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  • 101 capability

    1. возможность; способность
    4-D capability
    9-g capability
    accel-decel capability
    acceleration-deceleration capability
    acoustic processing capability
    aft-loading cargo capability
    air-defence capability
    air-superiority capability
    air-to-air capability
    air-to-air combat capability
    aircraft design capability
    airdrop capability
    all-aspect capability
    all-altitude penetration capability
    all-weather capability
    altitude reporting capability
    anti-g capability
    antihelicopter capability
    antisubmarine capability
    area navigation capability
    autolanding capability
    autonomous landing capability
    baseline capability
    beyond-visual-range capability
    birdstrike capability
    bump absorption capability
    Cat I capability
    climb capability
    CLmax capability
    computational capability
    continued takeoff capability
    cost-effective capability
    counter-countermeasures capability
    crossfeed capability
    crosswind capability
    decoupling capability
    degraded mode capability
    design capability
    diagnostic capability
    direct force capability
    dry-run capability
    dual-role capability
    endurance capability
    energy absorbing capability
    energy absorption capability
    engine-out capability
    enhanced capability
    fail-operational capability
    failure mode capability
    first-look capability
    first-shoot capability
    first-shot capability
    flutter prediction capability
    forward field capability
    full-aerobatic capability
    full-envelope 9-g load factor capability
    full-envelope escape capability
    full-lift capability
    full-envelope capability
    functional capability
    G capability
    g onset rate capability
    go-around capability
    gross weight capability
    hands-off landing capability
    hard-turning capability
    high-alpha capability
    high-g maneuver capability
    high-lift capability
    high-payload/long-range capability
    high-speed cruise capability
    hover capability
    IFR capability
    incidence capability
    independent capability
    inspection capability
    instantaneous maneuver capability
    instantaneous turn capability
    instantaneous turning capability
    instrument flight rule capability
    launch-and-leave capability
    lift capability
    limited all-weather capability
    load factor capability
    load-carrying capability
    loaded capability
    lock-on after launch capability
    look-ahead capability
    look-down shoot-down capability
    look-into-turn capability
    Mach 1.8 capability
    Mach number capability
    maneuver capability
    maneuvering capability
    moving-base capability
    multidesign-point capability
    multimission capability
    multiple-frequency capability
    multipoint tanker capability
    nap-of-the-earth capability
    naval attack capability
    negative-g capability
    night fighting capability
    nozzle vector capability
    off-airfield capability
    off-axis capability
    off-boresight capability
    off-boresight angle capability
    paradrop capability
    payload capability
    payload-carrying capability
    payload/range capability
    pilot-aircraft capability
    pitch rate capability
    pitch-snatch capability
    point-and-shoot capability
    post-stall capability
    probe-and-drogue capability
    PST capability
    range capability
    rate of climb capability
    real-time capability
    reduced-field-length capability
    rotor overspeed capability
    rough airfield capability
    rough field capability
    rough ground capability
    rough surface capability
    rugged-terrain capability
    see-through capability
    self-diagnostic capability
    short-field capability
    short-landing capability
    short-takeoff capability
    simulation capability
    sink-rate capability
    six degree-of-freedom capability
    snap/shoot attack capability
    sortie generation capability
    speed capability
    standoff capability
    stealth capability
    sustained turn capability
    sustained-g capability
    swing capability
    swing-role capability
    temperature capability
    terrain-clearance capability
    tolerance capability
    touchscreen capability
    tracking capability
    trim capability
    turn capability
    two-fail-operate capability
    unimproved-field capability
    variable-cycle capability
    vector capability
    vertical capability
    vertical landing capability
    zero altitude zero speed escape capability

    Авиасловарь > capability

  • 102 control

    1. управление; регулирование; управляемость; стабилизация/ управлять; регулировать
    2. управляющее устройство; регулятор; орган управления, средство управления; рычаг управления; поверхность управления, руль
    3. <pl> система управления; система регулирования
    4. управляющее воздействие, управление; отклонение органа управления; перемещение рычага управления
    6. подавление <напр. колебаний>; предотвращение
    см. тж. control,
    control in the pitch axis
    4-D control
    acceleration control
    adaptable control
    adaptive control
    aerodynamic control
    aeroelastic control
    aileron control
    air traffic control
    airborne control
    aircraft control
    airspeed control
    all-mechanical controls
    antispin controls
    approach control
    area control
    arrival control
    attitude control
    augmented controls
    autopilot control
    bang-bang control
    bank-to-turn control
    bimodal control
    boundary layer control
    bounded control
    BTT control
    buoyancy control
    bus control
    CG control
    cable control
    cable-operated controls
    camber control
    captain`s controls
    center-of-gravity control
    chattering control
    clearance control
    closed-loop control
    closed-loop controls
    cockpit control
    cockpit controls
    collective control
    collective-pitch control
    colocated control
    compensatory control
    configuration control
    continuous control
    cooperative control
    coordinated controls
    corrosion control
    cross controls
    crowd control
    cruise camber control
    cyclic control
    cyclic pitch control
    damper-induced control
    damping control
    decentralized control
    decoupled control
    deformable controls
    deformation control
    descent control
    differential control
    digital control
    direct force control
    direct lateral force control
    direct lift control
    direct lift controls
    direct sideforce control
    direct sideforce controls
    directional control
    directional attitude control
    directional flight path control
    discontinuous control
    discrete control
    displacement control
    distributed control
    divergence control
    drag control
    dual control
    elastic mode control
    electrical signalled control
    elevator control
    en route air traffic control
    engine controls
    error control
    evader control
    FBW controls
    feedback control
    fighter control
    final control
    fine control
    finger-on-glass control
    fingertip control
    finite-time control
    fixed-wing control
    flap control
    Flettner control
    flight control
    flight controls
    flight path control
    flow control
    fluidic control
    flutter control
    flutter mode control
    fly-by-glass control
    fly-by-light controls
    fly-by-wire controls
    flying control
    flying controls
    force control
    force sensitive control
    force sensitive controls
    forebody controls
    fountain control
    fracture control
    friend/foe control
    fuel control
    fuel distribution control
    fuel efficient control
    fuel feed control
    full control
    full nose-down control
    full nose-down to full nose-up control
    full-authority control
    full-authority controls
    full-state control
    full-time fly-by-wire control
    gain-scheduled control
    glide path control
    glideslope control
    ground-based control
    harmonized controls
    head-out control
    head-up control
    heading control
    held controls
    hierarchical control
    high-alpha control
    high-angle-of-attack control
    high-bandpass control
    high-bandwidth control
    high-speed control
    higher harmonic control
    higher harmonic controls
    highly augmented controls
    HOTAS controls
    hover mode control
    hovering control
    hydromechanical control
    in-flight control
    individual blade control
    individual flap cruise camber control
    infra-red emissions control
    inner-loop control
    input control
    input/output control
    integral control
    integrated control
    interactive controls
    intercom/comms controls
    irreversible control
    jet reaction control
    keyboard control
    keyboard controls
    knowledge-based control
    laminar flow control
    lateral control
    lateral-directional control
    leading-edge controls
    left control
    Liapunov optimal control
    linear quadratic Gaussian control
    linear quadratic regulator control
    load factor control
    longitudinal control
    longitudinal cyclic control
    low-bandwidth control
    low-speed control
    LQG control
    Lyapunov optimal control
    maneuver control
    maneuver camber control
    maneuver load control
    maneuvering control
    manual control
    mass-flow control
    microprocessor based control
    MIMO control
    minimax optimal control
    minimum time control
    minimum variance control
    misapplied controls
    mission-critical control
    mixing control
    modal control
    mode controls
    model-following control
    motion control
    multiaxis control
    multiple model control
    multiple-axis control
    multiple-input/multiple-output control
    multisurface control
    multivariable control
    neutral controls
    noise control
    noninertial control
    nonlinear feedback control
    nonunique control
    nose-down control
    nose-down pitch control
    open-loop control
    open-loop controls
    optimal control
    outer-loop control
    oxygen controls
    performance seeking control
    periodic control
    perturbational control
    pilot control
    pilot-induced oscillation prone control
    piloting control
    piloting controls
    pitch control
    pitch plane control
    pitch-recovery control
    pneumatic control
    pneumodynamic control
    pointing control
    positive control
    post stall control
    power control
    powered control
    predictive control
    pressurization control
    preview control
    pro-spin controls
    propeller control
    propeller controls
    proportional plus integral control
    propulsion controls
    propulsion system controls
    pursuer control
    pursuit control
    radio controls
    rate control
    rate controls
    ratio-type controls
    reaction control
    reconfigurable controls
    recovery control
    recovery controls
    reduced order control
    relay control
    remote pilot control
    responsive control
    restructurable control
    reverse control
    reversed control
    ride control
    rigid body control
    robust control
    roll control
    roll attitude control
    roll-axis control
    rotational control
    rotor control
    rudder control
    rudder controls
    rudder-only control
    sea control
    self-tuning control
    sequence control
    servo control
    servo-flap control
    servo-flap controls
    shock control
    shock wave/boundary layer control
    short period response control
    sideforce control
    sidestick control
    sidestick controls
    sight controls
    signature control
    single-axis control
    single-engine control
    single-lever control
    singular perturbation optimal control
    six degree-of-freedom control
    slew control
    slewing control
    sliding mode controls
    smoothed control
    snap-through control
    software-intensive flight controls
    space structure control
    station keeping control
    stepsize control
    stiffness control of structure
    stochastic control
    structural control
    structural mode control
    suboptimal control
    suction boundary layer control
    superaugmented control
    swashplate control
    sweep control
    systems control
    tactical controls
    tail control
    tail rotor control
    tailplane control
    task-oriented control
    task-tailored control
    taxying control
    terminal control
    thin control
    three-surface control
    throttle control
    thrust control
    thrust magnitude control
    tight control
    tilt control
    time-of-arrival control
    time-optimal control
    time/fuel optimal control
    tip clearance control
    to regain control
    torque control
    torque controls
    trailing-edge controls
    transient control
    translational control
    tri-surface control
    trim control
    turn coordination control
    upfront control
    upward-tilted control
    variable structure control
    vectorial control
    vehicular control
    velocity control
    vertical control
    vibration control
    voice actuated controls
    vortex control
    vortex manipulation control
    vortex-lift control
    wing-mounted controls
    yaw control

    Авиасловарь > control

  • 103 system

    system of axes
    3-component LDV system
    3-D LDV system
    4-D system
    4-D flight-management system
    4-D guidance system
    AC electrical system
    actuation system
    aerial delivery system
    aerostat system
    AEW system
    afterburning control system
    AI-based expert system
    aileron-to-rudder system
    air bleed offtake system
    air cushion system
    air cycle system
    air data system
    air defence system
    air induction system
    air refueling system
    air traffic control system
    air-combat advisory system
    air-conditioning system
    air-path axis system
    air-turbine starting system
    airborne early warning system
    aircooling system
    aircraft reference axis system
    aircraft weight-and-balance measuring system
    aircraft-autopilot system
    aircraft-based system
    aircraft-bifilar-pendulum system
    aircraft-carried earth axis system
    aircraft-carried normal earth axis system
    aircrew escape system
    airfield lighting control system
    airframe/rotor system
    airspeed system
    alcohol-wash system
    alignment control system
    all-electronic system
    all-weather mission system
    altitude loss warning system
    angle-of-attack command system
    anti-collision system
    anti-g system
    antitorque system
    anti-icing system
    antiskid system
    area-navigation system
    ARI system
    artificial feel system
    artificial intelligence-based expert system
    artificially augmented flight control system
    ATC system
    attitude and heading reference system
    audio system
    audiovisual system
    auto-diagnosis system
    auto-hover system
    autolanding system
    automatic cambering system
    automatic trim system
    autostabilization system
    autotrim system
    axis system
    B system
    balance-fixed coordinate system
    base-excited system
    basic axis system
    beam-foundation system
    bifilar pendulum suspension system
    bladder system
    blowing system
    blowing boundary layer control system
    blown flap system
    body axis system
    body axis coordinate system
    body-fitted coordinate system
    body-fixed reference system
    boom system
    boosted flight control system
    braking system
    breathing system
    buddy-buddy refuelling system
    cabin pressurization system
    cable-mount system
    CAD system
    canopy's jettison system
    cardiovascular system
    cargo loading system
    cargo-handling system
    carrier catapult system
    cartesian axis system
    Cat III system
    central nervous system
    CGI system
    circulating oil system
    closed cooling system
    closed-loop system
    cockpit system
    cockpit management system
    collision avoidance system
    combined cooling system
    command-by-voice system
    command/vehicle system
    commercial air transportation system
    compensatory system
    computer-aided design system
    computer-assisted system
    computer-generated image system
    computer-generated visual system
    concentrated-mass system
    conflict-alert system
    conservative system
    constant bandwidth system
    constant gain system
    consultative expert system
    control system
    control augmented system
    control loader system
    cooling system
    coordinate system
    counterstealth system
    coupled system
    coupled fire and flight-control system
    covert mission system
    crew systems
    cueing system
    curvilinear coordinate system
    damped system
    data system
    data acquisition system
    data handling system
    data transfer system
    data-gathering system
    DC electrical system
    decision support system
    defensive avionics system
    deicing system
    demisting system
    departure prevention system
    deterministic system
    dual-dual redundant system
    4-D navigation system
    6-DOF motion system
    diagnosable system
    dial-a-flap system
    direct impingement starting system
    displacement control system
    display system
    display-augmented system
    divergent system
    DLC system
    dogfight system
    door-to-door system
    Doppler ground velocity system
    double-balance system
    drive system
    drive train/rotor system
    dry air refueling system
    dual-field-of-view system
    dual-wing system
    dynamic system
    early-warning system
    Earth-centered coordinate system
    earth-fixed axis system
    earth/sky/horizon projector system
    ejection system
    ejection display system
    ejection seat escape system
    ejection sequence system
    ejector exhaust system
    ejector lift system
    election safety system
    electric starting system
    electro-expulsive deicing system
    electro-impulse deicing system
    electro-vibratory deicing system
    electronic flight instrumentation system
    Elint system
    emergency power system
    emitter locator system
    EMP-protected system
    engine monitoring system
    engine-propeller system
    engine-related system
    enhanced lift system
    envelope-limiting system
    environmental control system
    escape system
    excessive pitch attitude warning system
    exhaust system
    FADEC system
    fault-tolerant system
    FBW system
    feathering system
    feedback system
    feel system
    fin axis system
    fire detection system
    fire suppression system
    fire-extinguishing system
    fire-protection system
    five-point restraint system
    fixed-structure control system
    flap system
    flap/slat system
    flash-protection system
    flexible manufacturing system
    flight control system
    flight control actuation system
    flight director system
    flight inspection system
    flight management system
    flight path system
    flight path axis system
    flight test system
    flight-test instrumentation system
    flotation system
    fluid anti-icing system
    flutter control system
    flutter margin augmentation system
    flutter suppression system
    fluttering system
    fly-by-light system
    fly-by-light control system
    fly-by-wire system
    fly-by-wire/power-by-wire control system
    foolproof system
    force-excited system
    force-feel system
    forward vision augmentation system
    fuel conservative guidance system
    fuel management system
    fuel transfer system
    full-vectoring system
    full-authority digital engine control system
    full-motion system
    full-state system
    full-time system
    fully articulated rotor system
    fuselage axis system
    g-command system
    g-cueing system
    g-limiting system
    gas generator control system
    gas turbine starting system
    global positioning system
    governing system
    ground collision avoidance system
    ground proximity warning system
    ground-axes system
    ground-fixed coordinate system
    ground-referenced navigation system
    gust alleviation system
    gust control system
    gyroscopic system
    gyroscopically coupled system
    halon fire-extinguishing system
    halon gas fire-fighting system
    hands-off system
    head-aimed system
    headup guidance system
    helmet pointing system
    helmet-mounted visual system
    hierarchical system
    high-damping system
    high-authority system
    high-lift system
    high-order system
    high-pay-off system
    high-resolution system
    higher harmonic control system
    hose-reel system
    hot-gas anti-icing system
    hub plane axis system
    hub plane reference axis system
    hub-fixed coordinate system
    hydraulic system
    hydraulic starting system
    hydropneumatic system
    hydrostatic motion system
    hysteretic system
    ice-protection system
    icing cloud spray system
    icing-protection system
    identification friend or foe system
    image generator system
    in-flight entertainment system
    incidence limiting system
    inert gas generating system
    inertial coordinate system
    inertial navigation system
    inertial reference system
    infinite-dimensional system
    information management system
    inlet boundary layer control system
    inlet control system
    input system
    instruction system
    instrument landing system
    instrumentation system
    intelligence system
    intelligent system
    interconnection system
    intermediate axis system
    intrusion alarm system
    intrusion detection system
    inverted fuel system
    landing guidance system
    large-travel motion system
    laser-based visual system
    lateral attitude control system
    lateral control system
    lateral feel system
    lateral seat restraint system
    lateral-directional stability and command augmentation system
    lead compensated system
    left-handed coordinate system
    leg restraint system
    life support system
    liferaft deployment system
    lift-distribution control system
    lighter-than-air system
    lightly damped system
    lightning protection system
    lightning sensor system
    lightning warning system
    limited-envelope flight control system
    linear vibrating system
    liquid oxygen system
    load control system
    load indication system
    local-horizon system
    loom system
    low-damping system
    low-order system
    LQG controlled system
    lubrication system
    lumped parameter system
    Mach number system
    main transmission system
    maintenance diagnostic system
    maintenance record system
    man-in-the-loop system
    man-machine system
    maneuver demand system
    maneuvering attack system
    mass-spring-dashpot system
    mass-spring-damper system
    mast-mounted sight system
    mechanical-hydraulic flight control system
    microwave landing system
    MIMO system
    mine-sweeping system
    missile system
    missile-fixed system
    mission-planning system
    mobile aircraft arresting system
    modal cancellation system
    modal suppression system
    mode-decoupling system
    model reference system
    model-based visual system
    model-following system
    modelboard system
    molecular sieve oxygen generation system
    monopulse system
    motion system
    motion generation system
    multi-input single-output system
    multi-input, multi-output system
    multimode system
    multibody system
    multidegree-of-freedom system
    multiloop system
    multiple-input single output system
    multiple-input, multiple-output system
    multiple-loop system
    multiple-redundant system
    multiply supported system
    multishock system
    multivariable system
    navigation management system
    navigation/attack system
    navigation/bomb system
    NDT system
    neuromuscular system
    night/dusk visual system
    portable aircraft arresting system
    nitrogen inerting system
    no-tail-rotor system
    nonminimum phase system
    nonoscillatory system
    nonconservative system
    normal earth-fixed axis system
    Notar system
    nozzle control system
    nuclear-hardened system
    observer-based system
    obstacle warning system
    oil system
    on-board inert gas generation system
    on-board maintenance system
    on-board oxygen generating system
    on-off system
    one degree of freedom system
    one-shot lubrication system
    open cooling system
    open seat escape system
    open-loop system
    operability system
    optic-based control system
    optimally controlled system
    orthogonal axis system
    oxygen generation system
    parachute system
    partial vectoring system
    partial vibrating system
    performance-seeking system
    perturbed system
    pilot reveille system
    pilot vision system
    pilot-aircraft system
    pilot-aircraft-task system
    pilot-in-the-loop system
    pilot-manipulator system
    pilot-plus-airplane system
    pilot-vehicle-task system
    pilot-warning system
    pilot/vehicle system
    pitch change system
    pitch compensation system
    pitch stability and command augmentation system
    pitch rate system
    pitch rate command system
    pitch rate flight control system
    pneumatic deicing system
    pneumatic ice-protection system
    pneumodynamic system
    position hold system
    power system
    power-assisted system
    power-boosted system
    powered high-lift system
    powered-lift system
    precognitive system
    pressurization system
    preview system
    probabilistically diagnosable system
    probe refuelling system
    pronated escape system
    propeller-fixed coordinate system
    propulsive lift system
    proximity warning system
    pursuit system
    push-rod control system
    quantized system
    random system
    rating system
    reconfigurable system
    rectangular coordinate system
    reduced-gain system
    reference axis system
    refuelling system
    remote augmentor lift system
    remote combustion system
    response-feedback system
    restart system
    restraint system
    restructurable control system
    retraction system
    ride-control system
    ride-quality system
    ride-quality augmentation system
    ride-smoothing system
    right-handed axis system
    right-handed coordinate system
    rigid body system
    robotic refueling system
    rod-mass system
    roll augmentation system
    roll rate command system
    rotating system
    rotor system
    rotor isolation system
    rotor-body system
    rotor-wing lift system
    route planner system
    rudder trim system
    rudder-augmentation system
    sampled-data system
    scheduling system
    schlieren system
    sea-based system
    seat restraint system
    seatback video system
    self-adjoint system
    self-contained starting system
    self-diagnosable system
    self-excited system
    self-repairing system
    self-sealing fuel system
    self-tuning system
    shadow-mask system
    shadowgraph system
    ship-fixed coordinate system
    shock system
    short-closed oil system
    sighting system
    simulation system
    simulator-based learning system
    single degree of freedom system
    single-input multiple-output system
    singularly perturbed system
    situational awareness system
    six-axis motion system
    six-degree-of-freedom motion system
    six-puck brake system
    ski-and-wheel system
    skid-to-turn system
    snapping system
    soft mounting system
    soft ride system
    sound system
    speed-stability system
    spherical coordinate system
    spin recovery system
    spin-prevention system
    spring-mass-dashpot system
    stability and control augmentation system
    stability augmentation system
    stability axis coordinate system
    stability enhancement system
    stall detection system
    stall inhibitor system
    stall protection system
    stall warning system
    starting system
    stealth system
    stochastic system
    storage and retrieval system
    store alignment system
    stores management system
    strap-down inertial system
    structural system
    structural-mode compensation system
    structural-mode control system
    structural-mode suppression system
    STT system
    suppression system
    suspension system
    tactile sensory system
    tail clearance control system
    tail warning system
    task-tailored system
    terrain-aided navigation system
    terrain-referencing system
    test system
    thermal control system
    thermal protection system
    threat-warning system
    three-axis augmentation system
    three-body tethered system
    three-control system
    three-gyro system
    through-the-canopy escape system
    thrust modulation system
    thrust-vectoring system
    tilt-fold-rotor system
    time-invariant system
    time-varying system
    tip-path-plane coordinate system
    torque command/limiting system
    tractor rocket system
    trailing cone static pressure system
    training system
    trajectory guidance system
    translation rate command system
    translational acceleration control system
    trim system
    trim tank system
    triple-load-path system
    tutoring system
    twin-dome system
    two degree of freedom system
    two-body system
    two-input system
    two-input two-output system
    two-pod system
    two-shock system
    two-step shock absorber system
    unpowered flap system
    unpowered high-lift system
    utility services management system
    vapor cycle cooling system
    variable feel system
    variable stability system
    variable structure system
    vestibular sensory system
    vibrating system
    vibration isolation system
    vibration-control system
    vibration-damping system
    video-disc-based visual system
    visor projection system
    visual system
    visual display system
    visual flying rules system
    visual sensory system
    visual simulation system
    visually coupled system
    voice-activated system
    vortex system
    vortex attenuating system
    VTOL control system
    wake-imaging system
    warning system
    water injection cooling system
    water-mist system
    water-mist spray system
    weather system
    wheel steering system
    wide angle visual system
    wind coordinate system
    wind shear system
    wind-axes system
    wind-axes coordinate system
    wind-fixed coordinate system
    wing axis system
    wing flap system
    wing sweep system
    wing-load-alleviation system
    wing-mounted system
    wing/propulsion system
    wiring system
    yaw vane system

    Авиасловарь > system

  • 104 takeoff

    1. взлет; старт; отрыв (от земли)
    2. съем; отбор; отвод
    aborted takeoff
    afterburner takeoff
    clean takeoff
    confined area takeoff
    continued takeoff
    dual-engine takeoff
    free-deck takeoff
    high-altitude takeoff
    jet-assisted takeoff
    jump takeoff
    jump-assisted takeoff
    maximum performance takeoff
    maximum weight takeoff
    noise-abatement takeoff
    one-engine-inoperative takeoff
    pinnacle takeoff
    poor-visibility takeoff
    power takeoff
    ramp-assisted takeoff
    reduced thrust takeoff
    rejected takeoff
    rolling takeoff
    shipboard takeoff
    single-engined takeoff
    ski-jump takeoff
    steep takeoff
    STOL takeoff
    unassisted takeoff
    vertical takeoff
    water takeoff

    Авиасловарь > takeoff

  • 105 thrust

    тяга; сила тяги; осевое давление; импульс; создавать тягу или импульс

    start in reverse thrust — запускать (двигатель) в режиме реверса тяги [при включенном реверсе]

    Englsh-Russian aviation and space dictionary > thrust

  • 106 Arnold, Aza

    SUBJECT AREA: Textiles
    [br]
    b. 4 October 1788 Smithfield, Pawtucket, Rhode Island, USA
    d. 1865 Washington, DC, USA
    [br]
    American textile machinist who applied the differential motion to roving frames, solving the problem of winding on the delicate cotton rovings.
    [br]
    He was the son of Benjamin and Isabel Arnold, but his mother died when he was 2 years old and after his father's second marriage he was largely left to look after himself. After attending the village school he learnt the trade of a carpenter, and following this he became a machinist. He entered the employment of Samuel Slater, but left after a few years to engage in the unsuccessful manufacture of woollen blankets. He became involved in an engineering shop, where he devised a machine for taking wool off a carding machine and making it into endless slivers or rovings for spinning. He then became associated with a cotton-spinning mill, which led to his most important invention. The carded cotton sliver had to be reduced in thickness before it could be spun on the final machines such as the mule or the waterframe. The roving, as the mass of cotton fibres was called at this stage, was thin and very delicate because it could not be twisted to give strength, as this would not allow it to be drawn out again during the next stage. In order to wind the roving on to bobbins, the speed of the bobbin had to be just right but the diameter of the bobbin increased as it was filled. Obtaining the correct reduction in speed as the circumference increased was partially solved by the use of double-coned pulleys, but the driving belt was liable to slip owing to the power that had to be transmitted.
    The final solution to the problem came with the introduction of the differential drive with bevel gears or a sun-and-planet motion. Arnold had invented this compound motion in 1818 but did not think of applying it to the roving frame until 1820. It combined the direct-gearing drive from the main shaft of the machine with that from the cone-drum drive so that the latter only provided the difference between flyer and bobbin speeds, which meant that most of the transmission power was taken away from the belt. The patent for this invention was issued to Arnold on 23 January 1823 and was soon copied in Britain by Henry Houldsworth, although J.Green of Mansfield may have originated it independendy in the same year. Arnold's patent was widely infringed in America and he sued the Proprietors of the Locks and Canals, machine makers for the Lowell manufacturers, for $30,000, eventually receiving $3,500 compensation. Arnold had his own machine shop but he gave it up in 1838 and moved the Philadelphia, where he operated the Mulhausen Print Works. Around 1850 he went to Washington, DC, and became a patent attorney, remaining as such until his death. On 24 June 1856 he was granted patent for a self-setting and self-raking saw for sawing machines.
    [br]
    Bibliography
    28 June 1856, US patent no. 15,163 (self-setting and self-raking saw for sawing machines).
    Further Reading
    Dictionary of American Biography, Vol. 1.
    W.English, 1969, The Textile Industry, London (a description of the principles of the differential gear applied to the roving frame).
    D.J.Jeremy, 1981, Transatlantic Industrial Revolution. The Diffusion of Textile Technologies Between Britain and America, 1790–1830, Oxford (a discussion of the introduction and spread of Arnold's gear).
    RLH

    Biographical history of technology > Arnold, Aza

  • 107 Black, Harold Stephen

    [br]
    b. 14 April 1898 Leominster, Massachusetts, USA
    d. 11 December 1983 Summitt, New Jersey, USA
    [br]
    American electrical engineer who discovered that the application of negative feedback to amplifiers improved their stability and reduced distortion.
    [br]
    Black graduated from Worcester Polytechnic Institute, Massachusetts, in 1921 and joined the Western Electric Company laboratories (later the Bell Telephone Laboratories) in New York City. There he worked on a variety of electronic-communication problems. His major contribution was the discovery in 1927 that the application of negative feedback to an amplifier, whereby a fraction of the output signal is fed back to the input in the opposite phase, not only increases the stability of the amplifier but also has the effect of reducing the magnitude of any distortion introduced by it. This discovery has found wide application in the design of audio hi-fi amplifiers and various control systems, and has also given valuable insight into the way in which many animal control functions operate.
    During the Second World War he developed a form of pulse code modulation (PCM) to provide a practicable, secure telephony system for the US Army Signal Corps. From 1963–6, after his retirement from the Bell Labs, he was Principal Research Scientist with General Precision Inc., Little Falls, New Jersey, following which he became an independent consultant in communications. At the time of his death he held over 300 patents.
    [br]
    Principal Honours and Distinctions
    Institute of Electronic and Radio Engineers Lamme Medal 1957.
    Bibliography
    1934, "Stabilised feedback amplifiers", Electrical Engineering 53:114 (describes the principles of negative feedback).
    21 December 1937, US patent no. 2,106,671 (for his negative feedback discovery.
    1947, with J.O.Edson, "Pulse code modulation", Transactions of the American Institute of Electrical Engineers 66:895.
    1946, "A multichannel microwave radio relay system", Transactions of the American Institute of Electrical Engineers 65:798.
    1953, Modulation Theory, New York: D.van Nostrand.
    1988, Laboratory Management: Principles \& Practice, New York: Van Nostrand Rheinhold.
    Further Reading
    For early biographical details see "Harold S. Black, 1957 Lamme Medalist", Electrical Engineering (1958) 77:720; "H.S.Black", Institute of Electrical and Electronics Engineers Spectrum (1977) 54.
    KF

    Biographical history of technology > Black, Harold Stephen

  • 108 Booth, Hubert Cecil

    [br]
    b. 1871 Gloucester, England d. 1955
    [br]
    English mechanical, civil and construction engineer best remembered as the inventor of the vacuum cleaner.
    [br]
    As an engineer Booth contributed to the design of engines for Royal Navy battleships, designed and supervised the erection of a number of great wheels (in Blackpool, Vienna and Paris) and later designed factories and bridges.
    In 1900 he attended a demonstration, at St Paneras Station in London, of a new form of railway carriage cleaner that was supposed to blow the dirt into a container. It was not a very successful experiment and Booth, having considered the problem carefully, decided that sucking might be better than blowing. He tried out his idea by placing a piece of damp cloth over an upholstered armchair. When he sucked air by mouth through his cloth the dirt upon it was tangible proof of his theory.
    Various attempts were being made at this time, especially in America, to find a successful cleaner of carpets and upholstery. Booth produced the first truly satisfactory machine, which he patented in 1901, and coined the term "vacuum cleaner". He formed the Vacuum Cleaner Co. (later to become Goblin BVC Ltd) and began to manufacture his machines. For some years the company provided a cleaning service to town houses, using a large and costly vacuum cleaner (the first model cost £350). Painted scarlet, it measured 54×10×42 in. (137×25×110 cm) and was powered by a petrol-driven 5 hp piston engine. It was transported through the streets on a horse-driven van and was handled by a team of operators who parked outside the house to be cleaned. With the aid of several hundred feet of flexible hose extending from the cleaner through the windows into all the rooms, the machine sucked the dirt of decades from the carpets; at the first cleaning the weight of many such carpets was reduced by 50 per cent as the dirt was sucked away.
    Many attempts were made in Europe and America to produce a smaller and less expensive machine. Booth himself designed the chief British model in 1906, the Trolley- Vac, which was wheeled around the house on a trolley. Still elaborate, expensive and heavy, this machine could, however, be operated inside a room and was powered from an electric light fitting. It consisted of a sophisticated electric motor and a belt-driven rotary vacuum pump. Various hoses and fitments made possible the cleaning of many different surfaces and the dust was trapped in a cloth filter within a small metal canister. It was a superb vacuum cleaner but cost 35 guineas and weighed a hundredweight (50 kg), so it was difficult to take upstairs.
    Various alternative machines that were cheaper and lighter were devised, but none was truly efficient until a prototype that married a small electric motor to the machine was produced in 1907 in America.
    [br]
    Further Reading
    The Story of the World's First Vacuum Cleaner, Leatherhead: BSR (Housewares) Ltd. See also Hoover, William Henry.
    DY

    Biographical history of technology > Booth, Hubert Cecil

  • 109 Braun, Karl Ferdinand

    [br]
    b. 6 June 1850 Fulda, Hesse, Germany
    d. 20 April 1918 New York City, New York, USA
    [br]
    German physicist who shared with Marconi the 1909 Nobel Prize for Physics for developments in wireless telegraphy; inventor of the cathode ray oscilloscope.
    [br]
    After obtaining degrees from the universities of Marburg and Berlin (PhD) and spending a short time as Headmaster of the Thomas School in Berlin, Braun successively held professorships in theoretical physics at the universities of Marburg (1876), Strasbourg (1880) and Karlsruhe (1883) before becoming Professor of Experimental Physics at Tübingen in 1885 and Director and Professor of Physics at Strasbourg in 1895.
    During this time he devised experimental apparatus to determine the dielectric constant of rock salt and developed the Braun high-tension electrometer. He also discovered that certain mineral sulphide crystals would only conduct electricity in one direction, a rectification effect that made it possible to detect and demodulate radio signals in a more reliable manner than was possible with the coherer. Primarily, however, he was concerned with improving Marconi's radio transmitter to increase its broadcasting range. By using a transmitter circuit comprising a capacitor and a spark-gap, coupled to an aerial without a spark-gap, he was able to obtain much greater oscillatory currents in the latter, and by tuning the transmitter so that the oscillations occupied only a narrow frequency band he reduced the interference with other transmitters. Other achievements include the development of a directional aerial and the first practical wavemeter, and the measurement in Strasbourg of the strength of radio waves received from the Eiffel Tower transmitter in Paris. For all this work he subsequently shared with Marconi the 1909 Nobel Prize for Physics.
    Around 1895 he carried out experiments using a torsion balance in order to measure the universal gravitational constant, g, but the work for which he is probably best known is the addition of deflecting plates and a fluorescent screen to the Crooke's tube in 1897 in order to study the characteristics of high-frequency currents. The oscilloscope, as it was called, was not only the basis of a now widely used and highly versatile test instrument but was the forerunner of the cathode ray tube, or CRT, used for the display of radar and television images.
    At the beginning of the First World War, while in New York to testify in a patent suit, he was trapped by the entry of the USA into the war and remained in Brooklyn with his son until his death.
    [br]
    Principal Honours and Distinctions
    Nobel Prize for Physics (jointly with Marconi) 1909.
    Bibliography
    1874, "Assymetrical conduction of certain metal sulphides", Pogg. Annal. 153:556 (provides an account of the discovery of the crystal rectifier).
    1897, "On a method for the demonstration and study of currents varying with time", Wiedemann's Annalen 60:552 (his description of the cathode ray oscilloscope as a measuring tool).
    Further Reading
    K.Schlesinger \& E.G.Ramberg, 1962, "Beamdeflection and photo-devices", Proceedings of the Institute of Radio Engineers 50, 991.
    KF

    Biographical history of technology > Braun, Karl Ferdinand

  • 110 Carnot, Nicolas Léonard Sadi

    [br]
    b. 1 June 1796 Paris, France
    d. 24 August 1831 Paris, France
    [br]
    French laid the foundations for modern thermodynamics through his book Réflexions sur la puissance motrice du feu when he stated that the efficiency of an engine depended on the working substance and the temperature drop between the incoming and outgoing steam.
    [br]
    Sadi was the eldest son of Lazare Carnot, who was prominent as one of Napoleon's military and civil advisers. Sadi was born in the Palais du Petit Luxembourg and grew up during the Napoleonic wars. He was tutored by his father until in 1812, at the minimum age of 16, he entered the Ecole Polytechnique to study stress analysis, mechanics, descriptive geometry and chemistry. He organized the students to fight against the allies at Vincennes in 1814. He left the Polytechnique that October and went to the Ecole du Génie at Metz as a student second lieutenant. While there, he wrote several scientific papers, but on the Restoration in 1815 he was regarded with suspicion because of the support his father had given Napoleon. In 1816, on completion of his studies, Sadi became a second lieutenant in the Metz engineering regiment and spent his time in garrison duty, drawing up plans of fortifications. He seized the chance to escape from this dull routine in 1819 through an appointment to the army general staff corps in Paris, where he took leave of absence on half pay and began further courses of study at the Sorbonne, Collège de France, Ecole des Mines and the Conservatoire des Arts et Métiers. He was inter-ested in industrial development, political economy, tax reform and the fine arts.
    It was not until 1821 that he began to concentrate on the steam-engine, and he soon proposed his early form of the Carnot cycle. He sought to find a general solution to cover all types of steam-engine, and reduced their operation to three basic stages: an isothermal expansion as the steam entered the cylinder; an adiabatic expansion; and an isothermal compression in the condenser. In 1824 he published his Réflexions sur la puissance motrice du feu, which was well received at the time but quickly forgotten. In it he accepted the caloric theory of heat but pointed out the impossibility of perpetual motion. His main contribution to a correct understanding of a heat engine, however, lay in his suggestion that power can be produced only where there exists a temperature difference due "not to an actual consumption of caloric but to its transportation from a warm body to a cold body". He used the analogy of a water-wheel with the water falling around its circumference. He proposed the true Carnot cycle with the addition of a final adiabatic compression in which motive power was con sumed to heat the gas to its original incoming temperature and so closed the cycle. He realized the importance of beginning with the temperature of the fire and not the steam in the boiler. These ideas were not taken up in the study of thermodynartiics until after Sadi's death when B.P.E.Clapeyron discovered his book in 1834.
    In 1824 Sadi was recalled to military service as a staff captain, but he resigned in 1828 to devote his time to physics and economics. He continued his work on steam-engines and began to develop a kinetic theory of heat. In 1831 he was investigating the physical properties of gases and vapours, especially the relationship between temperature and pressure. In June 1832 he contracted scarlet fever, which was followed by "brain fever". He made a partial recovery, but that August he fell victim to a cholera epidemic to which he quickly succumbed.
    [br]
    Bibliography
    1824, Réflexions sur la puissance motrice du feu; pub. 1960, trans. R.H.Thurston, New York: Dover Publications; pub. 1978, trans. Robert Fox, Paris (full biographical accounts are provided in the introductions of the translated editions).
    Further Reading
    Dictionary of Scientific Biography, 1971, Vol. III, New York: C.Scribner's Sons. T.I.Williams (ed.), 1969, A Biographical Dictionary of Scientists, London: A. \& C.
    Black.
    Chambers Concise Dictionary of Scientists, 1989, Cambridge.
    D.S.L.Cardwell, 1971, from Watt to Clausius. The Rise of Thermodynamics in the Early Industrial Age, London: Heinemann (discusses Carnot's theories of heat).
    RLH

    Biographical history of technology > Carnot, Nicolas Léonard Sadi

  • 111 Casablancas, Fernando

    SUBJECT AREA: Textiles
    [br]
    fl. 1912 Spain
    [br]
    Spanish inventor of the first of the high-draft cotton-spinning systems.
    [br]
    In 1912, Casablancas took out three patents in Britain. The first of these was for putting false twist into textile fibres during the drawing part of spinning. In his next we can find the origins of his interest in his high-draft system, for it contains intermediate sectors or rollers between the usual drawing rollers. It was not until the third patent that there appeared the basis of the modern system with endless inextensible strips of material passing round the rollers to help support the fibres. His first system was for spinning fibres of medium length, giving a much greater draft. This consisted of two aprons around the middle pair of drafting rollers which reached almost to the front ones. The aprons lightly pressed the fibres together in the drafting zone and yet allowed the more-quickly rotating front rollers to pull fibres out of the aprons quite easily. This enabled slivers or rovings to be reduced in thickness more quickly and evenly. In 1913, a further patent showed a development of the apron system where guides made the aprons move in an "S" pattern. Then in 1914 a patent illustrated something similar to the modern layout, while two further patents in the following year contained slightly different layouts. His system was soon applied to both ring frames and the mule, and while it was first applied to cotton, it soon spread to worsted. High-draft spinning was also envisaged by Casablancas and he took out a further patent in 1920 to obtain drafts in a ratio of several hundreds. His principles are used today on some of the most recent open-end spinning frames.
    [br]
    Bibliography
    1912, British patent no. 11,376 (textile fibres with false twist). 1912, British patent no. 11,783.
    1912. British patent no. 12,477.
    1913. British patent no. 11,613.
    1914. British patent no. 19,372 1915. British patent no. 3,366.
    1915, British patent no. 14,228.
    Further Reading
    C.Singer (ed.), 1978, A History of Technology, Vol. 6, Oxford: Clarendon Press (mentions his spinning methods).
    RLH

    Biographical history of technology > Casablancas, Fernando

  • 112 Coolidge, William David

    SUBJECT AREA: Electricity, Metallurgy
    [br]
    b. 23 October 1873 Hudson, Massachusetts, USA
    d. 3 February 1975 New York, USA
    [br]
    American physicist and metallurgist who invented a method of producing ductile tungsten wire for electric lamps.
    [br]
    Coolidge obtained his BS from the Massachusetts Institute of Technology (MIT) in 1896, and his PhD (physics) from the University of Leipzig in 1899. He was appointed Assistant Professor of Physics at MIT in 1904, and in 1905 he joined the staff of the General Electric Company's research laboratory at Schenectady. In 1905 Schenectady was trying to make tungsten-filament lamps to counter the competition of the tantalum-filament lamps then being produced by their German rival Siemens. The first tungsten lamps made by Just and Hanaman in Vienna in 1904 had been too fragile for general use. Coolidge and his life-long collaborator, Colin G. Fink, succeeded in 1910 by hot-working directly dense sintered tungsten compacts into wire. This success was the result of a flash of insight by Coolidge, who first perceived that fully recrystallized tungsten wire was always brittle and that only partially work-hardened wire retained a measure of ductility. This grasped, a process was developed which induced ductility into the wire by hot-working at temperatures below those required for full recrystallization, so that an elongated fibrous grain structure was progressively developed. Sintered tungsten ingots were swaged to bar at temperatures around 1,500°C and at the end of the process ductile tungsten filament wire was drawn through diamond dies around 550°C. This process allowed General Electric to dominate the world lamp market. Tungsten lamps consumed only one-third the energy of carbon lamps, and for the first time the cost of electric lighting was reduced to that of gas. Between 1911 and 1914, manufacturing licences for the General Electric patents had been granted for most of the developed work. The validity of the General Electric monopoly was bitterly contested, though in all the litigation that followed, Coolidge's fibering principle was upheld. Commercial arrangements between General Electric and European producers such as Siemens led to the name "Osram" being commonly applied to any lamp with a drawn tungsten filament. In 1910 Coolidge patented the use of thoria as a particular additive that greatly improved the high-temperature strength of tungsten filaments. From this development sprang the technique of "dispersion strengthening", still being widely used in the development of high-temperature alloys in the 1990s. In 1913 Coolidge introduced the first controllable hot-cathode X-ray tube, which had a tungsten target and operated in vacuo rather than in a gaseous atmosphere. With this equipment, medical radiography could for the first time be safely practised on a routine basis. During the First World War, Coolidge developed portable X-ray units for use in field hospitals, and between the First and Second World Wars he introduced between 1 and 2 million X-ray machines for cancer treatment and for industrial radiography. He became Director of the Schenectady laboratory in 1932, and from 1940 until 1944 he was Vice-President and Director of Research. After retirement he was retained as an X-ray consultant, and in this capacity he attended the Bikini atom bomb trials in 1946. Throughout the Second World War he was a member of the National Defence Research Committee.
    [br]
    Bibliography
    1965, "The development of ductile tungsten", Sorby Centennial Symposium on the History of Metallurgy, AIME Metallurgy Society Conference, Vol. 27, ed. Cyril Stanley Smith, Gordon and Breach, pp. 443–9.
    Further Reading
    D.J.Jones and A.Prince, 1985, "Tungsten and high density alloys", Journal of the Historical Metallurgy Society 19(1):72–84.
    ASD

    Biographical history of technology > Coolidge, William David

  • 113 Deering, William

    [br]
    b. 1826 USA
    d. 1913 USA
    [br]
    American entrepreneur who invested in the developing agricultural machinery manufacturing industry and became one of the founders of the International Harvester Company.
    [br]
    Deering began work in his father's woollen mill and, with this business experience, developed Deering, Milliken \& Co., a wholesale dry goods business. Deering invested $40,000 in the Marsh reaper business in 1870, and became a partner in 1872. In 1880 he gained full control of the company and took up residence in Chicago, where he set up a factory. In 1878 he saw the Appleby binders, and in November of that year he negotiated a licence agreement for their manufacture. Deering was aware that with only two twine manufacturers operating in the US, the high price of twine was discouraging sales of binders. He therefore entered into an agreement with Edwin H.Fitler of Philadelphia for the production of very large quantities of twine, and in so doing dramatically reduced its price. In 1880 Deering released onto the market 3,000 binders and ten cartloads of twine that he had manufactured secretly. By 1890 McCormick and Deering were market leaders; Deering anticipated McCormick in a number of technical areas and also diversified his business into ore, timber, and a rolling and casting mill. After several false starts, a merger between the two companies took place on 12 August 1902 to form the International Harvester Company, with Deering as chairman of the voting trust which was established to control it. The company expanded into Canada in 1903 and into Europe in 1905. It began its first experiments with tractors in that same year and produced the first production models in 1906. The company went into truck production in 1907.
    [br]
    Further Reading
    C.H.Wendell, 1981, 150 Years of International Harvester, Crestlink Publishing (though more concerned with the machinery produced by International Harvester, this gives an account of its originating companies, and the personalities behind them).
    H.N.Casson, 1908, The Romance of the Reaper, Doubleday Page (deals with McCormick, Deering and the formation of International Harvester).
    AP

    Biographical history of technology > Deering, William

  • 114 Dony, Jean-Jacques Daniel

    SUBJECT AREA: Metallurgy
    [br]
    b. 24 February 1759 Liège, Belgium
    d. 6 November 1819 Liège, Belgium
    [br]
    Belgian inventor of the horizontal retort process of zinc manufacture.
    [br]
    Dony trained initially for the Church, and it is not known how he became interested in the production of zinc. Liège, however, was close to extensive deposits of the zinc ore calamine, and brass had been made since Roman times in the region between Liège and Aix-la-Chapelle (now Aachen). William Champion's technique of brass manufacture was known there and was considered to be too complicated and expensive for the routine manufacture of brass. Dony may have learned about earlier processes of manufacturing zinc on the European continent from his friend Professor Villette of Liège University, and about English methods from Henri Delloye, a friend of both Villette and Dony and who visited Birmingham and Bristol on their behalf to study zinc smelting processes and brass manufacture at first hand. By 21 March 1805 Dony had succeeded in extracting zinc from calamine and casting it in ingots. On the basis of this success he applied to the French Republican administration for assistance and in 1806 was assigned by Napoleon the sole mining rights to the calamine deposits of the Vieille Montagne, or Altenberg, near Moresnet, five miles (8 km) from Aachen. With these rights went the obligation of developing an industrially viable method of zinc refining. In 1807 he constructed a small factory at Isle and there, after much effort, he perfected his celebrated horizontal retort process, the "Liège Method". After July 1809 zinc was being produced in abundance, and in January 1810 Dony was granted an Imperial Patent giving him a monopoly of zinc manufacture for fifteen years. He erected a rolling mill at Saint-Léonard and attempted to persuade the Minister of Marine to use zinc sheets rather than copper for the protection of ships. Between 1809 and 1810 Dony reduced the price of zinc in Liège from 8.60 to 2.60 francs per kilo. However, after 1813 he began to encounter financial problems and in 1818 he surrendered his commercial interests to his partner Dominique Mosselman (d. 1837). The horizontal retort process soon rendered obsolete that of William Champion, and variants of the Liège Method were rapidly evolved in Germany, Britain and the USA.
    [br]
    Further Reading
    A.Dony, 1941, A Propos de l'industrie belge du zinc au début du XIXe siècle, Brussels. L.Boscheron, "The zinc industry of the Liège District", Journal of the Institution of
    Metals 36 (2):21–6.
    H.Delloye, 1810, Recherches sur la calamine, le zinc et les emplois, Liège: Dauvrain. 1836, Bibliographie Liégeoise.
    ASD

    Biographical history of technology > Dony, Jean-Jacques Daniel

  • 115 Du Yu (Tu Yu)

    [br]
    b. 222 China
    d. 284 China
    [br]
    Chinese general and engineer.
    [br]
    Du Yu was one of the generals who reduced the San Guo state of Wu for the Chin in 280. He is credited with the diffusion of the water-powered trip hammer and the multiple-geared watermill for the grinding of cereals. A battery of trip hammers was developed, operated by several shafts working off one large water-wheel. He was responsible for the construction of the Heyang pontoon bridges over the Yellow River north-east of Leyang in 274 and also devised new designs for water-powered blowing engines, against the advice of the imperial advisors but with the emperor's encouragement.
    [br]
    Further Reading
    Joseph Needham, Science and Civilisation in China, Cambridge: Cambridge University Press, 1959–1965, Vols III, p. 601; IV. 1, p. 35, IV. 2, pp. 30, 86, 195, 393, 394, 396; IV. 3, pp. 160–1.
    LRD

    Biographical history of technology > Du Yu (Tu Yu)

  • 116 Eiffel, Alexandre Gustave

    SUBJECT AREA: Civil engineering
    [br]
    b. 15 December 1832 Dijon, France
    d. 27 December 1923 Paris, France
    [br]
    French engineer, best known for the famous tower in Paris that bears his name.
    [br]
    During his long life Eiffel, together with a number of architects, was responsible for the design and construction of a wide variety of bridges, viaducts, harbour installations, exhibition halls, galleries and department stores; he set up his own firm in 1867 to handle such construction. Of particular note were his great arched bridges, such as the 530 ft (162 m) span arch over the River Douro at Oporto in Portugal (1877–9) and the 550 ft (168 m) span of the Pont de Garabit over the Truyère in France (1880–4). He was responsible in 1884 for the protective iron-work for the Statue of Liberty in New York and, a year later, for the great dome over the Nice Observatory. In 1876 he had collaborated with Boileau to build the Bon Marché department store in Paris. The predominant material for all these structures was iron, and, in some cases glass was important. The famous Eiffel Tower in Paris is entirely of wrought iron, and the legs are supported on masonry piers that are each set into concrete beneath the ground. The idea of the tower was first conceived in 1884 by Maurice Koechlin and Emile Nougier, and Eiffel won a competition for the commission to built the structure. His imaginative and practical scheme was for a strong lightweight construction 984 ft (300 m) high, with its 12,000 sections to be prefabricated and riveted together largely before erection; the open, perforated design reduced the problems of wind resistance. The tower was constructed on schedule by 1889 to commemorate the centenary of the outbreak of the French Revolution and was the tallest structure in the world until the erection of the Empire State Building in New York in 1930–2.
    [br]
    Further Reading
    J.Harriss, 1975, The Tallest Tower: Eiffel and the Belle Epoque, Boston: Hough ton Mifflin.
    F.Poncetton, 1939, Eiffel: Le Magicien du Fer, Paris: Tournelle.
    DY

    Biographical history of technology > Eiffel, Alexandre Gustave

  • 117 Giffard, Baptiste Henry Jacques (Henri)

    [br]
    b. 8 February 1825 Paris, France
    d. 14 April 1882 Paris, France
    [br]
    French pioneer of airships and balloons, inventor of an injector for steam-boiler feedwater.
    [br]
    Giffard entered the works of the Western Railway of France at the age of 16 but became absorbed by the problem of steam-powered aerial navigation. He proposed a steam-powered helicopter in 1847, but he then turned his attention to an airship. He designed a lightweight coke-burning, single-cylinder steam engine and boiler which produced just over 3 hp (2.2 kW) and mounted it below a cigar-shaped gas bag 44 m (144 ft) in length. A triangular rudder was fitted at the rear to control the direction of flight. On 24 September 1852 Giffard took off from Paris and, at a steady 8 km/h (5 mph), he travelled 28 km (17 miles) to Trappes. This can be claimed to be the first steerable lighter-than-air craft, but with a top speed of only 8 km/h (5 mph) even a modest headwind would have reduced the forward speed to nil (or even negative). Giffard built a second airship, which crashed in 1855, slightly injuring Giffard and his companion; a third airship was planned with a very large gas bag in order to lift the inherently heavy steam engine and boiler, but this was never built. His airships were inflated by coal gas and refusal by the gas company to provide further supplies brought these promising experiments to a premature end.
    As a draughtsman Giffard had the opportunity to travel on locomotives and he observed the inadequacies of the feed pumps then used to supply boiler feedwater. To overcome these problems he invented the injector with its series of three cones: in the first cone (convergent), steam at or below boiler pressure becomes a high-velocity jet; in the second (also convergent), it combines with feedwater to condense and impart high velocity to it; and in the third (divergent), that velocity is converted into pressure sufficient to overcome the pressure of steam in the boiler. The injector, patented by Giffard, was quickly adopted by railways everywhere, and the royalties provided him with funds to finance further experiments in aviation. These took the form of tethered hydrogen-inflated balloons of successively larger size. At the Paris Exposition of 1878 one of these balloons carried fifty-two passengers on each tethered "flight". The height of the balloon was controlled by a cable attached to a huge steam-powered winch, and by the end of the fair 1,033 ascents had been made and 35,000 passengers had seen Paris from the air. This, and similar balloons, greatly widened the public's interest in aeronautics. Sadly, after becoming blind, Giffard committed suicide; however, he died a rich man and bequeathed large sums of money to the State for humanitarian an scientific purposes.
    [br]
    Principal Honours and Distinctions
    Croix de la Légion d'honneur 1863.
    Bibliography
    1860, Notice théorique et pratique sur l'injecteur automoteur.
    1870, Description du premier aérostat à vapeur.
    Further Reading
    Dictionnaire de biographie française.
    Gaston Tissandier, 1872, Les Ballons dirigeables, Paris.
    —1878, Le Grand ballon captif à vapeur de M. Henri Giffard, Paris.
    W.de Fonvielle, 1882, Les Ballons dirigeables à vapeur de H.Giffard, Paris. Giffard is covered in most books on balloons or airships, e.g.: Basil Clarke, 1961, The History of Airships, London. L.T.C.Rolt, 1966, The Aeronauts, London.
    Ian McNeill (ed.), 1990, An Encyclopaedia of the History of Technology, London: Routledge, pp. 575 and 614.
    J.T.Hodgson and C.S.Lake, 1954, Locomotive Management, Tothill Press, p. 100.
    PJGR / JDS

    Biographical history of technology > Giffard, Baptiste Henry Jacques (Henri)

  • 118 Gramme, Zénobe Théophile

    [br]
    b. 4 April 1826 Jehay-Bodignée, Belgium
    d. 20 January 1901 Bois de Colombes, Paris, France
    [br]
    Belgian engineer whose improvements to the dynamo produced a machine ready for successful commercial exploitation.
    [br]
    Gramme trained as a carpenter and showed an early talent for working with machinery. Moving to Paris he found employment in the Alliance factory as a model maker. With a growing interest in electricity he left to become an instrument maker with Heinrich Daniel Rühmkorff. In 1870 he patented the uniformly wound ring-armature dynamo with which his name is associated. Together with Hippolyte Fontaine, in 1871 Gramme opened a factory to manufacture his dynamos. They rapidly became a commercial success for both arc lighting and electrochemical purposes, international publicity being achieved at exhibitions in Vienna, Paris and Philadelphia. It was the realization that a Gramme machine was capable of running as a motor, i.e. the reversibility of function, that illustrated the entire concept of power transmission by electricity. This was first publicly demonstrated in 1873. In 1874 Gramme reduced the size and increased the efficiency of his generators by relying completely on the principle of self-excitation. It was the first practical machine in which were combined the features of continuity of commutation, self-excitation, good lamination of the armature core and a reasonably good magnetic circuit. This dynamo, together with the self-regulating arc lamps then available, made possible the innumerable electric-lighting schemes that followed. These were of the greatest importance in demonstrating that electric lighting was a practical and economic means of illumination. Gramme also designed an alternator to operate Jablochkoff candles. For some years he took an active part in the operations of the Société Gramme and also experimented in his own workshop without collaboration, but made no further contribution to electrical technology.
    [br]
    Principal Honours and Distinctions
    Knight Commander, Order of Leopold of Belgium 1897. Chevalier de la Légion d'honneur. Chevalier, Order of the Iron Crown, Austria.
    Bibliography
    9 June 1870, British patent no. 1,668 (the ring armature machine).
    1871, Comptes rendus 73:175–8 (Gramme's first description of his invention).
    Further Reading
    W.J.King, 1962, The Development of Electrical Technology in the 19th Century, Washington, DC: Smithsonian Institution, Paper 30, pp. 377–90 (an extensive account of Gramme's machines).
    S.P.Thompson, 1901, obituary, Electrician 66: 509–10.
    C.C.Gillispie (ed.), 1972, Dictionary of Scientific Biography, Vol. V, New York, p. 496.
    GW

    Biographical history of technology > Gramme, Zénobe Théophile

  • 119 Hall, Charles Martin

    SUBJECT AREA: Metallurgy
    [br]
    b. 6 December 1863 Thompson, Ohio, USA
    d. 27 December 1914 USA
    [br]
    American metallurgist, inventor of the first feasible electrolytic process for the production of aluminium.
    [br]
    The son of a Congregationalist minister, Hall was educated at Oberlin College. There he was instructed in chemistry by Professor F.F.Jewett, a former student of the German chemist Friedrich Wöhler, who encouraged Hall to believe that there was a need for a cheap process for the manufacture of aluminium. After graduating in 1885, Hall set to work in his private laboratory exploring the method of fused salt electrolysis. On Wednesday 10 February 1886 he found that alumina dissolved in fused cryolite "like sugar in water", and that the bath so produced was a good conductor of electricity. He contained the solution in a pure graphite crucible which also acted as an efficient cathode, and by 16 February 1886 had produced the first globules of metallic aluminium. With two backers, Hall was able to complete his experiments and establish a small pilot plant in Boston, but they withdrew after the US Patent Examiners reported that Hall's invention had been anticipated by a French patent, filed by Paul Toussaint Héroult in April 1886. Although Hall had not filed until July 1886, he was permitted to testify that his invention had been completed by 16 February 1886 and on 2 April 1889 he was granted a seventeen-year monopoly in the United States. Hall now had the support of Captain A.E. Hunt of the Pittsburgh Testing Institute who provided the capital for establishing the Pittsburgh Reduction Company, which by 1889 was selling aluminium at $1 per pound compared to the $15 for sodium-reduced aluminium. Further capital was provided by the banker Andrew Mellon (1855–1937). Hall then turned his attention to Britain and began negotiations with Johnson Matthey, who provided land on a site at Patricroft near Manchester. Here the Aluminium Syndicate, owned by the Pittsburgh Reduction Company, began to produce aluminium in July 1890. By this time the validity of Hall's patent was being strongly contested by Héroult and also by the Cowles brothers, who attempted to operate the Hall process in the United States. Hall successfully sued them for infringement, and was confirmed in his patent rights by the celebrated ruling in 1893 of William Howard Taft, subsequently President of the USA. In 1895 Hall's company changed its name to the Pittsburgh Aluminium Company and moved to Niagara Falls, where cheap electrical power was available. In 1903 a legal compromise ended the litigation between the Hall and Héroult organizations. The American rights in the invention were awarded to Hall, and the European to Héroult. The Pittsburgh Aluminium Company became the Aluminium Company of America on 1 January 1907. On his death he left his estate, worth about $45 million, for the advancement of education.
    [br]
    Principal Honours and Distinctions
    Chemical Society, London, Perkin Medal 1911.
    Further Reading
    H.N.Holmes, 1930, "The story of aluminium", Journal of Chemical Education. E.F.Smith, 1914, Chemistry in America.
    ASD

    Biographical history of technology > Hall, Charles Martin

  • 120 Hamilton, Harold Lee (Hal)

    [br]
    b. 14 June 1890 Little Shasta, California, USA
    d. 3 May 1969 California, USA
    [br]
    American pioneer of diesel rail traction.
    [br]
    Orphaned as a child, Hamilton went to work for Southern Pacific Railroad in his teens, and then worked for several other companies. In his spare time he learned mathematics and physics from a retired professor. In 1911 he joined the White Motor Company, makers of road motor vehicles in Denver, Colorado, where he had gone to recuperate from malaria. He remained there until 1922, apart from an eighteenth-month break for war service.
    Upon his return from war service, Hamilton found White selling petrol-engined railbuses with mechanical transmission, based on road vehicles, to railways. He noted that they were not robust enough and that the success of petrol railcars with electric transmission, built by General Electric since 1906, was limited as they were complex to drive and maintain. In 1922 Hamilton formed, and became President of, the Electro- Motive Engineering Corporation (later Electro-Motive Corporation) to design and produce petrol-electric rail cars. Needing an engine larger than those used in road vehicles, yet lighter and faster than marine engines, he approached the Win ton Engine Company to develop a suitable engine; in addition, General Electric provided electric transmission with a simplified control system. Using these components, Hamilton arranged for his petrol-electric railcars to be built by the St Louis Car Company, with the first being completed in 1924. It was the beginning of a highly successful series. Fuel costs were lower than for steam trains and initial costs were kept down by using standardized vehicles instead of designing for individual railways. Maintenance costs were minimized because Electro-Motive kept stocks of spare parts and supplied replacement units when necessary. As more powerful, 800 hp (600 kW) railcars were produced, railways tended to use them to haul trailer vehicles, although that practice reduced the fuel saving. By the end of the decade Electro-Motive needed engines more powerful still and therefore had to use cheap fuel. Diesel engines of the period, such as those that Winton had made for some years, were too heavy in relation to their power, and too slow and sluggish for rail use. Their fuel-injection system was erratic and insufficiently robust and Hamilton concluded that a separate injector was needed for each cylinder.
    In 1930 Electro-Motive Corporation and Winton were acquired by General Motors in pursuance of their aim to develop a diesel engine suitable for rail traction, with the use of unit fuel injectors; Hamilton retained his position as President. At this time, industrial depression had combined with road and air competition to undermine railway-passenger business, and Ralph Budd, President of the Chicago, Burlington \& Quincy Railroad, thought that traffic could be recovered by way of high-speed, luxury motor trains; hence the Pioneer Zephyr was built for the Burlington. This comprised a 600 hp (450 kW), lightweight, two-stroke, diesel engine developed by General Motors (model 201 A), with electric transmission, that powered a streamlined train of three articulated coaches. This train demonstrated its powers on 26 May 1934 by running non-stop from Denver to Chicago, a distance of 1,015 miles (1,635 km), in 13 hours and 6 minutes, when the fastest steam schedule was 26 hours. Hamilton and Budd were among those on board the train, and it ushered in an era of high-speed diesel trains in the USA. By then Hamilton, with General Motors backing, was planning to use the lightweight engine to power diesel-electric locomotives. Their layout was derived not from steam locomotives, but from the standard American boxcar. The power plant was mounted within the body and powered the bogies, and driver's cabs were at each end. Two 900 hp (670 kW) engines were mounted in a single car to become an 1,800 hp (l,340 kW) locomotive, which could be operated in multiple by a single driver to form a 3,600 hp (2,680 kW) locomotive. To keep costs down, standard locomotives could be mass-produced rather than needing individual designs for each railway, as with steam locomotives. Two units of this type were completed in 1935 and sent on trial throughout much of the USA. They were able to match steam locomotive performance, with considerable economies: fuel costs alone were halved and there was much less wear on the track. In the same year, Electro-Motive began manufacturing diesel-electrie locomotives at La Grange, Illinois, with design modifications: the driver was placed high up above a projecting nose, which improved visibility and provided protection in the event of collision on unguarded level crossings; six-wheeled bogies were introduced, to reduce axle loading and improve stability. The first production passenger locomotives emerged from La Grange in 1937, and by early 1939 seventy units were in service. Meanwhile, improved engines had been developed and were being made at La Grange, and late in 1939 a prototype, four-unit, 5,400 hp (4,000 kW) diesel-electric locomotive for freight trains was produced and sent out on test from coast to coast; production versions appeared late in 1940. After an interval from 1941 to 1943, when Electro-Motive produced diesel engines for military and naval use, locomotive production resumed in quantity in 1944, and within a few years diesel power replaced steam on most railways in the USA.
    Hal Hamilton remained President of Electro-Motive Corporation until 1942, when it became a division of General Motors, of which he became Vice-President.
    [br]
    Further Reading
    P.M.Reck, 1948, On Time: The History of the Electro-Motive Division of General Motors Corporation, La Grange, Ill.: General Motors (describes Hamilton's career).
    PJGR

    Biographical history of technology > Hamilton, Harold Lee (Hal)

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