-
41 actuator
4) возд. рулевая машинка•-
actuator of sensitive switch
-
air actuator
-
air-oil actuator
-
arm actuator
-
band actuator
-
bellows actuator
-
bin actuator
-
brake valve actuator
-
cam actuator
-
control actuator
-
control-rod actuator
-
diaphragm actuator
-
digital actuator
-
double-vane actuator
-
driving actuator
-
electric actuator
-
electrostatic actuator
-
exhaust gas recirculation actuator
-
flap actuator
-
frequency-controlled actuator
-
governor control air actuator
-
high-output low-speed actuator
-
hydraulic actuator
-
hydraulic linear actuator
-
joint actuator
-
lens actuator
-
linear actuator
-
load feel actuator
-
manual valve actuator
-
master cylinder actuator
-
mechanical valve actuator
-
multiposition actuator
-
piezoelectric actuator
-
pilot solenoid controlled valve actuator
-
piston-rack type actuator
-
pitch trim actuator
-
pneumatic actuator
-
power-operated actuator
-
relay actuator
-
retracting actuator
-
reverse bucket actuator
-
rocker actuator
-
rotary actuator
-
self-contained actuator
-
single-vane actuator
-
spring-type brake actuator
-
tilt actuator
-
torque actuator
-
trim tab actuator
-
tuning actuator
-
valve actuator
-
vane-type rotary actuator -
42 actuator
механическое устройство для перемещения; исполнительный механизм; привод (силовой); привод регулирующей заслонки; соленоид; актуатор; приводной механизм; рулевой привод; пускатель (силовой); рабочий орган; рукоятка для приведения в действие; рукоятка привода; рычаг для пуска; усилитель; двигатель; управляющее устройство; переключатель; механизм управления клапанов; механизм управления штуцеров; привод головок- actuator arm - actuator assembly - actuator axis - actuator cylinder - actuator drive signal - actuator force - actuator-gear-load assembly - actuator handle - actuator length - actuator level - actuator lock - actuator mechanism - actuator of sensitive switch - actuator operated valve - actuator package - actuator pin - actuator power - actuator ramp - actuator response time - actuator screw - actuator solenoid - actuator valve - air actuator - air-oil actuator - arm actuator - band actuator - bellows actuator - bin actuator - brake valve actuator - cam actuator - control actuator - control-rod actuator - cylinder actuator - diaphragm actuator - digital actuator - double-toggle actuator - double-vane actuator - driving actuator - dual body actuator - electric actuator - electrostatic actuator - exhaust gas recirculation actuator - frequency-controlled actuator - governor actuator - governor control air actuator - high-output low-speed actuator - hydraulic actuator - hydraulic linear actuator - hydraulic motor actuator - joint actuator - linear actuator - load feel actuator - manual valve actuator - master cylinder actuator - mechanical valve actuator - multiposition actuator - pilot solenoid controlled valve actuator - piston-rack type actuator - pneumatic actuator - power-operated actuator - relay actuator - retracting actuator - rocker actuator - rotary actuator - self-contained actuator - single-vane actuator - spring-type brake actuator - torque actuator - valve actuator -
43 box
1. замковая муфта, муфта соединительного замка; соединение с внутренней замковой резьбой2. коробка, ящик; кожухsensor signal input box — блок приёма сигналов датчиков (напр., в системе позиционирования бурового судна)
— axle box— dump box— fire box— gear box— mud box— pump box— sand box
* * *
1. ящик; коробка2. втулка; гнездо— core box— dump box— mud box— sand box— slip box
* * *
соединение с внутренней замковой резьбой, замковая муфта, высаженный конец трубы с резьбой для соединения
* * *
1) ящик; коробка5) керновый ящик || упаковывать керн в ящики6) втулка; гнездо7) закладывать скважины по четырём углам квадрата при пробуренной скважине в центре•- box of tool joint
- barrier box
- bastard box
- blasting box
- blind box
- blowout prevention stuffing box
- bull wheel box
- cable terminal box
- calf wheel box
- casing head stuffing box
- cleanout box
- condenser box
- core box
- coupling box
- crossing box
- dehydration box
- discharge box
- dividing box
- dump box
- free-water knockout box
- impression box
- inserted box
- journal box
- knockout box
- measuring line stuffing box
- mud box
- mud stuffing box
- packing box
- polished rod stuffing box
- pulley box
- pump box
- ratchet box
- receiving box
- riser lock box
- rod stuffing box
- rose box
- run-down box
- safety box
- safety joint box
- sand box
- screen box
- screw-type stuffing box
- self-sealing stuffing box
- self-tightening packing box
- sensor signal input box
- separator box
- settling box
- shooting box
- slip box
- sludge box
- splash box
- square shouldered tool joint box
- still cheese box
- strum box
- stuffing box
- stuffing box for back washing
- three-speed gear box
- tool box
- tool joint box
- wet box
- wheel box
- worry box* * *• 1) камера; 2) муфта• закладывать скважины по четырем углам квадрата при пробуренной скважине в центре• муфта• отсек -
44 gear
-
45 valve
затвор
– actuator valve
– air bleed valve
– air valve
– air-admission valve
– angle valve
– balanced valve
– bang-bang valve
– bleeding valve
– blow-off valve
– brake valve
– butterfly valve
– butterfly-type valve
– by-pass valve
– bypass valve
– cam lifts the valve
– check valve
– chimney valve
– clack valve
– coupled valve
– cutoff valve
– diaphragm valve
– direct-acting valve
– discharge valve
– distribution valve
– double-seated valve
– drain valve
– drop valve
– dry back-pressure valve
– dump valve
– emergency valve
– equalizing valve
– exhaust valve
– expansion valve
– figure-of-merit of valve
– flanged valve
– flood valve
– four-way valve
– fuel valve
– gate valve
– globe valve
– grid valve
– grind a valve
– hot-cathode valve
– inhalation valve
– inlet valve
– jet-pipe valve
– kingston valve
– low-lift valve
– maneuvering valve
– mercury-arc valve
– metering valve
– motorized valve
– mud valve
– multi-way valve
– multielectrode valve
– multiway valve
– needle valve
– overload valve
– pilot valve
– pitted valve
– plug valve
– plunger valve
– poppet valve
– power valve
– pressure-operated valve
– pressure-relief valve
– propellant-control valve
– quick-acting valve
– rectifier valve
– reducing valve
– reface a valve
– release valve
– relief valve
– rotary valve
– safety valve
– selector valve
– shut-off valve
– single-seated valve
– single-stage valve
– slide valve
– spring-and-ball valve
– starting valve
– steam-admission valve
– step valve
– sticking of valve
– stop valve
– straightway valve
– suction valve
– swing valve
– swinging valve
– tempering air valve
– three-way valve
– throttle valve
– throttling valve
– tuyere valve
– two-electrode valve
– two-stage valve
– two-way valve
– valve accelerometer
– valve actuator
– valve body
– valve bounce
– valve box
– valve burns
– valve cage
– valve cap
– valve chamber
– valve chatters
– valve closing
– valve cup
– valve diameter
– valve fouling
– valve gas
– valve gear
– valve grinder
– valve grinding
– valve head
– valve holder
– valve lag
– valve lift
– valve needle
– valve opening
– valve passage
– valve plate
– valve port
– valve reclamation
– valve remover
– valve rocker
– valve rod
– valve seat
– valve shaft
– valve spindle
– valve spring
– valve tappet
– valve tube
– valve wavemeter
– valve wrench
– vent valve
– welding-end valve
liquid-flow throttling valve — переменный гидравлический дроссель
main isolating valve — <engin.> задвижка напорная главная
non-rising-stem gate valve — задвижка с невыдвижным шпинделем
poppet valve head — <engin.> тарель
pressure regulator valve — <engin.> золотник регулятора давления
safety regulator valve — <engin.> золотник регулятора безопасности
-
46 engine
-
47 box
1) ящик, коробка2) букса; кожух; муфта; втулка; гнездо3) будка; ложа4) камера шлюза6) заделывать досками (напр. концы стропильных ног)•- air box - air-suction box - annealing box - ash box - balance box - batch box - battery box - cable box - casting box - cementing box - cinder box - collapsible box - control box - culvert box - distributor box - dividing box - electronic control box - exhaust box - feed box - fermenting box - fire box - flothing box - flushing box - gauge box - gravel box - grease box - hog box - hoisting box - hydrant street box - ice box - inspection box - mortar box - moulding box - mud box - plug box - post box - putty box - sand box - sediment box - receiving box - service box - silt box - slaking box - sluice box - smoke box - speed box - spreader box - spring box - starting box - street surface box - switch box - terminal box - T-junction box - tool box - wall boxbox-out — образование проёмов, ниш в бетоне
* * *1. короб, коробка; ящик2. будка, кабина; небольшое отгороженное помещение; небольшой домик (охотника, рыболова)3. ложа в театре4. тюремная камера- air distribution boxto box out — образовывать отверстия или ниши в бетоне ( путём закладки обрамляющей рамки)
- air mixing box
- air supply box
- ash box
- balance box
- batch box
- beam box
- blender box
- branch box
- call box
- cess box
- conduit box
- core storage box
- core box
- culvert box
- curb-valve box
- distribution box
- division box
- dual duct box
- fan inlet box
- feeder box
- floor box
- flower box
- gauge box
- glove box
- gravel box
- grout box
- hydrant box
- inlet box
- junction box
- measuring box
- miter box
- mixing box
- mortar box
- mud box
- pipe box
- riffle box
- sand box
- sediment box
- settling box
- shaking box
- shear box
- silt box
- single duct box
- smoke box
- stilling box
- stone-filled box
- straining box
- stuffing box
- telephone box
- terminal box
- underwater concreting box
- valve box
- variable air volume box
- wall box
- weigh box
- weir box -
48 gauge
( измерительный) прибор; датчик; толщина; калибр; измерять; калибровать, градуироватьC.I.T. gauge — указатель температуры на входе в компрессор
cabin air temperature gauge — термометр воздуха в кабине, кабинный термометр
exhaust gas temperature gauge — указатель температуры [термометр] выходящих газов [газов за турбиной]
fly on the gauges — разг. лететь по приборам
jet pipe temperature gauge — термометр [указатель температуры] выходящих газов [газов за турбиной]
r.p.m. gauge — тахометр, указатель числа оборотов
stay on the gauges — разг. оставаться в полете [продолжать полет] по приборам
temperature compensated strain gauge — термокомпенсированный тензометр [тензодатчик]
turbine gas temperature gauge — термометр [указатель температуры] газов в турбине
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49 shaft
2) стержень (напр. колонны)3) шахта (напр. лифта); лестничная клетка4) вал; шпиндель; ось6) рукоятка; ручка ( инструмента)7) главный вал ( швейной машины)•-
actuating shaft
-
agitator shaft
-
air shaft
-
anchor shaft
-
armature shaft
-
auxiliary shaft
-
axle shaft
-
backup shaft
-
balancer shaft
-
bent shaft
-
blind shaft
-
bogie oscillating shaft
-
bolt shaft
-
boring bar shaft
-
boring shaft
-
brake shaft
-
cam shaft
-
capstan shaft
-
cardan shaft
-
carrier roller shaft
-
cathead shaft
-
center shaft
-
centershift drive shaft
-
change shaft
-
changeover box operating shaft
-
chimney shaft
-
circle drive pinion shaft
-
circular shaft
-
clamp shaft
-
clutch shaft
-
column shaft
-
concrete lined shaft
-
control shaft
-
coupling shaft
-
cross shaft
-
deep shaft
-
diminished column shaft
-
distributing shaft
-
downcast shaft
-
downhole motor bit shaft
-
drainage shaft
-
drive shaft
-
driven shaft
-
drop shaft
-
dummy shaft
-
eccentric shaft
-
eight-diameter stepped shaft
-
electric shaft
-
elevator shaft
-
engine drive shaft
-
entasized column shaft
-
exhaust shaft
-
expandable shaft
-
exploration shaft
-
feed lifting rock shaft
-
feed shaft
-
first-motion shaft
-
flap actuating shaft
-
flexible shaft
-
floating half shaft
-
front drive shaft
-
fuel pump drive shaft
-
gate shaft
-
gear shaft
-
generator shaft
-
half shaft
-
hollow shaft
-
idler shaft
-
inclined shaft
-
inclined surge shaft
-
input shaft
-
inspection shaft
-
intake shaft
-
lift shaft
-
line shaft
-
locklift rotary shaft
-
lower shaft
-
main drive shaft
-
main shaft
-
motor shaft
-
multidiameter shaft
-
oar shaft
-
oiling gear shaft
-
oscillating shaft
-
output shaft
-
picking shaft
-
pinion shaft
-
pitman shaft
-
pivot shaft
-
power shaft
-
production shaft
-
propeller shaft
-
propulsion shaft
-
pumping shaft
-
rectangular shaft
-
removable shaft
-
reverse shifter shaft
-
riser shaft
-
rock shaft
-
rocker shaft
-
rotor shaft
-
rotor synchronizing shaft
-
second-motion shaft
-
shallow shaft
-
shifter shaft
-
slender shaft
-
solid shaft
-
speed setting shaft
-
spilling surge shaft
-
spillway shaft
-
spindle shaft
-
spinning shaft
-
splined shaft
-
spline shaft
-
sprocket shaft
-
stepped shaft
-
stern-tube shaft
-
stern shaft
-
stiff shaft
-
straight shaft
-
sunk shaft
-
supply shaft
-
support shaft
-
surge shaft
-
tail shaft
-
takeoff shaft
-
tapered shaft
-
timing shaft
-
top gear shaft
-
torsion shaft
-
traction motor shaft
-
transmission clutch shaft
-
transmission main shaft
-
transmission shaft
-
traverse shaft
-
underground shaft
-
undersize shaft
-
unlined shaft
-
upcast shaft
-
valve lever shaft
-
vertical shaft
-
working shaft
-
worm shaft -
50 box
ящик; шкаф (для рабочей одежды, инструментов и т.п.); коробка; стойло; козлы; бокс; волокуша; букса; кожух; муфта; втулка; вкладыш (подшипника); рудничная вагонетка- box beam- box body- box end wrench - box-frame - box furnace - box garage - box girder - box-handling crane with grab - box-handling crane with magnet - box joint - box key - box-lid joint - box lock - box marking - box nut - box pipe end - box piston - box post - box ring wrench - box seat - box-section track roller frame - box-section frame - box spanner - box spar - box-type - box-type clip - box van- air box- antifriction box- ash box- axle box- brake box - branch box - brush box - buffer box - cam box - chain box - charging box - clack box - compensating stuffing box - connecting box - console box - core box - coupling box - distributor box - dividing box - drain box - exhaust box - expansion stuffing box - feed box - flushing box - frame box - gear box - grease box - guide box - hoist box - horizontal stuffing box - inserted stuffing box - inverted stuffing box - journal box - junction box - labyrinth box - lever box - link box - load box - main box - mitre box - moulding box - mud box - nave box - oil box - packing box - radiator box - scouring box - seal box - seed-box - service box - speed box - spindle box - splice box - spring box - starting box - steel box - steering box - straining box - stuffing box - switch box - T-junction box - tool box - transfer box - trifurcating box - valve box - vertical stuffing box - voltage control box - wheel box -
51 brake
тормоз; тормозное устройство; с.х. тяжёлая борона; II тормозить; притормаживать; разбивать комья (бороной); месить; мять- brake actuating piston - brake anchor plate - brake anchorage - brake application time - brake band clevis - brake band lining - brake bell crank - brake bleed nipple spanner - brake bleeder tank - brake bleeder tube - brake cable - brake caliper - brake caliper lever - brake cam - brake camshaft - brake camshaft lever - brake chamber - brake chatter - brake cheek - brake clevis - brake clip - brake compressor - brake conduit - brake cone - brake control - brake controller - brake controls - brake coupling - brake cross lever - brake cylinder - brake cylinder lever - brake cylinder piston - brake cylinder piston cup - brake cylinder pressure - brake cylinder release valve - brake diagram - brake disk - brake disk pack - brake drag - brake drum - brake drum anvil - brake drum dust cover - brake drum fin - brake drum lathe - brake-drum liner - brake dynamometer - brake equalizer - brake expander - brake fade - brake fluid - brake fluid header tank - brake fluid reservoir - brake fluid warning light - brake force - brake force limiter - brake fuel consumption - brake gear - brake governor - brake hand lever - brake handle - brake hard - brake head - brake hop - brake hood - brake horsepower - brake horsepower efficiency - brake horsepower-hour - brake hose - brake hose clip - brake housing - brake hub - brake hydraulic valve - brake intermediate shaft - brake latch - brake latch rod - brake latch spoon - brake latch spring - brake lever - brake lever pawl - brake lever quadrant - brake lever sector - brake lever segment - brake lights - brake line - brake lining - brake linkage - brake load - brake lug - brake master cylinder - brake mean effective pressure - brake motor - brake operating cam - brake operating lever - brake operating spindle - brake pad - brake pawl - brake pedal - brake pedal arm - brake pedal shaft - brake pipe - brake piston - brake power - brake pressure - brake pull-rod - brake pulley - brake push rod - brake ratchet - brake release - brake release spring - brake reliner - brake reservoir - brake resistance - brake rigging - brake ring - brake rod - brake rod yoke - brake scotch - brake shaft - brake shoe - brake shoe adjusting cam - brake shoe anchor bolt - brake shoe carrier - brake shoe expander - brake shoe facing - brake shoe fulcrum pin - brake shoe grinder - brake shoe hinge pin - brake shoe lining - brake shoe return spring - brake slack - brake specific fuel consumption - brake spring - brake spring pliers - brake squeak - brake support - brake surface - brake test - brake tester - brake thermal efficiency - brake thrust ring - brake thrust screw - brake toggle - brake torque - brake tube flaring tool set - brake up - brake value - brake valve - brake with two leading shoes - release the brake - air-brake failure - air-brake hose - air-over-hydraulic brake - baking brake plate - cable-operated brake - cable-operated hand brake - cam brake - cam-actuated brake - cam-operated brake - Carpenter brake - centrifugal brake - chain brake - cheek brake - clasp brake - clip brake - clutch brake - coaster brake - combined compressed-air and hydraulic brake - compressed-air brake - cone brake - contracting band brake - crane brake - dead-weight brake - differential brake - differential steering brake - disc brake - double-block brake - drum brake - duo-servo brake - dynamometer brake - eddy-current brake - effective brake - electric brake - electromagnetic brake - electromagnetic brake with clamping jaws - electropneumatic brake - emergency brake - emergency contracting brake - engine brake - exhaust brake - expanding brake - expanding band brake - expanding inside brake - expanding wedge brake - expansion brake - external brake - external block brake - external cheek brake - external contracting brake - externally acting brake - fan brake - fluid brake - foot brake - four-wheel brakes - friction brake - front-wheel brake - grip brake - gripper brake - half servo brake - hand brake - hand lever brake - hoist brake - hoisting gear brake - hub brake - hydraulic brake - hydraulic brake with vacuum power - hydraulic foot brake - inboard brake - inner brake - inside brake - internal brake - internal block brake - internal-expanding brake - internal wheel brake - internally acting brake - key-operated brake - knee brake - Kunze-Knorr brake - lever brake - lift brake - link brake - liquid brake - load-pressure brake - load reaction brake - lowering brake - magnetic brake - Maley brake - master clutch brake - mechanical brake - multiple-disc brake - needle brake - oil brake - outer brake - outer band brake - outside-mounted brake - overrunning trailer brake - parking brake - pedal brake - plate brake - pneumatic brake - power brake - progressive brake - Prony brake - quick-action air brake - regenerative brake - rim brake - rope brake - safety brake - screw brake - segmented rotor brake - self-acting brake - self-actuating brake - self-energizing brake - service brake - servo brake - servo and power brake - servo-assisted brake - shoe brake - single-block brake - skate brake - slipper brake - solenoid brake - speed brake - steering brake - steering-clutch brake - stopping brake - strap brake - thrust brake - toggle brake - track brake - transmission brake - triple servo brake - tyre brake - unbalanced brake - vacuum brake - vacuum power brake - V-block brake - water brake - water-cooled brake - wedge brake - wedge-operated brake - weight brake - Westinghouse brake - wheel brake - wing brake -
52 multiple
многократный; сложный; составной; гармоническая составляющая (колебаний); со сложной структурой; множественный; неоднократный; повторяющийся; кратное число; II кратный- multiple access - multiple asperity - multiple axis system - multiple barrier containment - multiple belting - multiple bladed shutter - apertured shutter - multiple blades - multiple burns - multiple bus structure - multiple cable - multiple cable joint - multiple capacitor bank - multiple capture - multiple charge exchange - multiple chucking - multiple clamping - multiple coating - multiple collet fixture - multiple component failures - multiple connected battery - multiple connection - multiple connector - multiple contact - multiple contact relay - multiple contact switch - multiple control - multiple cord tyre - multiple cracking - multiple crossing - multiple defects - multiple degree-of-freedom mechanism with single engine - multiple delay line - multiple detector - multiple determinations - multiple deviation - multiple disk brake - multiple earthing - multiple electrometer - multiple electrostatic deflector - multiple exhaust - multiple failure - multiple faults - multiple gear pump - multiple glazing - multiple groove valve stem - multiple hole tapping machine - multiple hydraulic fracturing - multiple impulsive burns - multiple insert tool - multiple layer - multiple line hydraulic hose - multiple lip seal - multiple machining - multiple manipulators - multiple metering - multiple nut runner - multiple operation - multiple oscillation - multiple parameter method - multiple-piece ring - multiple plough - multiple plug - multiple point welding - multiple position switch - multiple projection welding - multiple purpose meter - multiple range transmission - multiple reflection interferometer - multiple relay - multiple ring valve - multiple robot manipulator - multiple row milling cutter - multiple sensor head - multiple separation - multiple shank ripper - multiple sheave block - multiple shock air intake - multiple slip - multiple slip joint pliers with single joint - multiple slip joint pliers with tongue and groove - multiple slip-joint gripping pliers - multiple sputtering - multiple start - multiple station isolator valve - multiple-stepped piston - multiple strand chain - multiple switch - multiple tank - multiple thread - multiple thread cutter - multiple-type thread milling cutter - multiple-unit injection pump - multiple V-belt - multiple V-belt drive -
53 non-reversible pistol-grip drill with self-tightening chuck
= air exhaust through the handle and precise power regulation for the a better control of the speed нереверсивная дрель в виде пистолета с самозатягивающимся патроном, выпуском воздуха через ручку и точным регулятором мощности для лучшего управления скоростью вращенияАнгло-русский словарь по машиностроению > non-reversible pistol-grip drill with self-tightening chuck
-
54 guidance
beam(-climber, -follower, -rider,-riding) guidance — наведение (ракеты) по лучу
reference trajectory reentry guidance — управление КЛА при возвращении в атмосферу с использованием опорной траектории
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55 Priestman, William Dent
SUBJECT AREA: Steam and internal combustion engines[br]b. 23 August 1847 Sutton, Hull, Englandd. 7 September 1936 Hull, England[br]English oil engine pioneer.[br]William was the second son and one of eleven children of Samuel Priestman, who had moved to Hull after retiring as a corn miller in Kirkstall, Leeds, and who in retirement had become a director of the North Eastern Railway Company. The family were strict Quakers, so William was sent to the Quaker School in Bootham, York. He left school at the age of 17 to start an engineering apprenticeship at the Humber Iron Works, but this company failed so the apprenticeship was continued with the North Eastern Railway, Gateshead. In 1869 he joined the hydraulics department of Sir William Armstrong \& Company, Newcastle upon Tyne, but after a year there his father financed him in business at a small, run down works, the Holderness Foundry, Hull. He was soon joined by his brother, Samuel, their main business being the manufacture of dredging equipment (grabs), cranes and winches. In the late 1870s William became interested in internal combustion engines. He took a sublicence to manufacture petrol engines to the patents of Eugène Etève of Paris from the British licensees, Moll and Dando. These engines operated in a similar manner to the non-compression gas engines of Lenoir. Failure to make the two-stroke version of this engine work satisfactorily forced him to pay royalties to Crossley Bros, the British licensees of the Otto four-stroke patents.Fear of the dangers of petrol as a fuel, reflected by the associated very high insurance premiums, led William to experiment with the use of lamp oil as an engine fuel. His first of many patents was for a vaporizer. This was in 1885, well before Ackroyd Stuart. What distinguished the Priestman engine was the provision of an air pump which pressurized the fuel tank, outlets at the top and bottom of which led to a fuel atomizer injecting continuously into a vaporizing chamber heated by the exhaust gases. A spring-loaded inlet valve connected the chamber to the atmosphere, with the inlet valve proper between the chamber and the working cylinder being camoperated. A plug valve in the fuel line and a butterfly valve at the inlet to the chamber were operated, via a linkage, by the speed governor; this is believed to be the first use of this method of control. It was found that vaporization was only partly achieved, the higher fractions of the fuel condensing on the cylinder walls. A virtue was made of this as it provided vital lubrication. A starting system had to be provided, this comprising a lamp for preheating the vaporizing chamber and a hand pump for pressurizing the fuel tank.Engines of 2–10 hp (1.5–7.5 kW) were exhibited to the press in 1886; of these, a vertical engine was installed in a tram car and one of the horizontals in a motor dray. In 1888, engines were shown publicly at the Royal Agricultural Show, while in 1890 two-cylinder vertical marine engines were introduced in sizes from 2 to 10 hp (1.5–7.5 kW), and later double-acting ones up to some 60 hp (45 kW). First, clutch and gearbox reversing was used, but reversing propellers were fitted later (Priestman patent of 1892). In the same year a factory was established in Philadelphia, USA, where engines in the range 5–20 hp (3.7–15 kW) were made. Construction was radically different from that of the previous ones, the bosses of the twin flywheels acting as crank discs with the main bearings on the outside.On independent test in 1892, a Priestman engine achieved a full-load brake thermal efficiency of some 14 per cent, a very creditable figure for a compression ratio limited to under 3:1 by detonation problems. However, efficiency at low loads fell off seriously owing to the throttle governing, and the engines were heavy, complex and expensive compared with the competition.Decline in sales of dredging equipment and bad debts forced the firm into insolvency in 1895 and receivers took over. A new company was formed, the brothers being excluded. However, they were able to attend board meetings, but to exert no influence. Engine activities ceased in about 1904 after over 1,000 engines had been made. It is probable that the Quaker ethics of the brothers were out of place in a business that was becoming increasingly cut-throat. William spent the rest of his long life serving others.[br]Further ReadingC.Lyle Cummins, 1976, Internal Fire, Carnot Press.C.Lyle Cummins and J.D.Priestman, 1985, "William Dent Priestman, oil engine pioneer and inventor: his engine patents 1885–1901", Proceedings of the Institution ofMechanical Engineers 199:133.Anthony Harcombe, 1977, "Priestman's oil engine", Stationary Engine Magazine 42 (August).JBBiographical history of technology > Priestman, William Dent
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