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1 clock-operated contact
clock-operated contact Zeitgeberkontakt mEnglish-German dictionary of Electrical Engineering and Electronics > clock-operated contact
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2 Hipp, Matthäus
[br]b. 25 October 1813 Blaubeuren, Germanyd. 3 May 1893 Zurich, Switzerland[br]German inventor and entrepreneur who produced the first reliable electric clock.[br]After serving an apprenticeship with a clock-maker in Blaubeuren, Hipp worked for various clockmakers before setting up his own workshop in Reutlingen in 1840. In 1842 he made his first electric clock with an ingenious toggle mechanism for switching the current, although he claimed that the idea had occurred to him eight years earlier. The switching mechanism was the Achilles' heel of early electric clocks. It was usually operated by the pendulum and it presented the designer with a dilemma: if the switch made a firm contact it adversely affected the timekeeping, but if the contact was lightened it sometimes failed to operate due to dirt or corrosion on the contacts. The Hipp toggle switch overcame this problem by operating only when the amplitude of the pendulum dropped below a certain value. As this occurred infrequently, the contact pressure could be increased to provide reliable switching without adversely affecting the timekeeping. It is an indication of the effectiveness of the Hipp toggle that it was used in clocks for over one hundred years and was adopted by many other makers in addition to Hipp and his successor Favag. It was generally preferred for its reliability rather than its precision, although a regulator made in 1881 for the observatory at Neuchâtel performed creditably. This regulator was enclosed in an airtight case at low pressure, eliminating errors due to changes in barometric pressure. This practice later became standard for observatory regulators such as those of Riefler and Shortt. The ability of the Hipp toggle to provide more power when the clock was subjected to an increased load made it particularly suitable for use in turret clocks, whose hands were exposed to the vagaries of the weather. Hipp also improved the operation of slave dials, which were advanced periodically by an electrical impulse from a master clock. If the electrical contacts "chattered" and produced several impulses instead of a single sharp impulse, the slave dials would not indicate the correct time. Hipp solved this problem by producing master clocks which delivered impulses that alternated in polarity, and slave dials which only advanced when the polarity was changed in this way. Polarized impulses delivered every minute became the standard practice for slave dials used on the European continent. Hipp also improved Wheatstone's chronoscope, an instrument that was used for measuring very short intervals of time (such as those involved in ballistics).[br]Principal Honours and DistinctionsHonorary doctorate, University of Zurich 1875.Further ReadingNeue deutsche Biographie, 1972, Vol. 9, Berlin, pp. 199–200."Hipp's sich selbst conrolirende Uhr", Dinglers polytechnisches Journal (1843), 88:258– 64 (the first description of the Hipp toggle).F.Hope-Jones, 1949, Electrical Timekeeping, 2nd edn, London, pp. 62–6, 97–8 (a modern description in English of the Hipp toggle and the slave dial).C.A.Aked, 1983, "Electrical precision", Antiquarian Horology 14:172–81 (describes the observatory clock at Neuchâtel).DV -
3 generator
1) генератор3) датчик, (первичный) измерительный преобразователь5) генератриса, производящая функция6) вчт. генерирующая программа, генератор•to wind the generator — наматывать обмотку генератора-
hockey stick steam generator
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ac generator
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acetylene generator
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acoustic generator
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acoustic pulse generator
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acyclic generator
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address generator
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airborne ice nuclei generator
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air-cooled generator
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air-gap-conductor generator
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amplidyne generator
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analytical-function generator
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answer generator
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arbitrary-function generator
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arc generator
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arc-welding generator
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artwork generator
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asynchronous generator
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atmospheric steam generator
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audio-frequency generator
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auxiliary generator
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axle generator
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bar generator
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bar-and-dot generator
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bar-dot generator
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base generator
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basic frequency generator
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battery-charging generator
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bell-type generator
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bell generator
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bias generator
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binary generator
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bipolar generator
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bit-rate generator
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blocking generator
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booster generator
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borehole neutron generator
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brushless generator
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brushless salient-pole ac generator
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bulbwater-wheel generator
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bulb generator
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burst generator
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burst-controlled generator
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call generator
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caption generator
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carrier generator
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cascade generator
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character generator
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character-controlled generator
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charging generator
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chip generator
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chirp generator
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chromakey generator
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clock-pulse generator
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clock generator
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closed-cycle MHD generator
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coal fluidized-bed generator
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coaxial noise generator
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code generator
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collector-type generator
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color reference generator
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color-background generator
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color-bar generator
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color-pattern generator
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command generator
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compiler generator
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complex-wave generator
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compound generator
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compound signal generator
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computer-art generator
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constant-potential generator
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contact-type generator
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contact generator
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crossed-field generator
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cross-hatch generator
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current generator
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curve generator
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cylindrical-rotor generator
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data generator
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dc generator
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degaussing generator
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delay generator
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digital effects generator
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digitally tunable generator
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digit-symbol display generator
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digit-symbol generator
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dipping-type generator
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dipping generator
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direct-expansion ice generator
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display generator
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display vector generator
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document generator
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dot generator
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dot-matrix character generator
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double-current generator
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double-effect generator
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drive-pulse generator
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driving generator
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drooping characteristic generator
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drop generator
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dry residue-type generator
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dry residue generator
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electric generator
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electric steam generator
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electrochemical generator
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electrodynamic vibration generator
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electrolytic generator
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electromagnetic vibration generator
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electron-beam pattern generator
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electronically controlled generator
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electronic controlled generator
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electrostatic generator
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emergency generator
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encapsulated hydraulic turbine generator
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explicit-pole generator
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field generator
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fine triangular waveform generator
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fixed range mark generator
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fixed-format dot character generator
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fixed-format dot generator
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fluid pulse generator
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flying-spot color-signal generator
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flying-spot video generator
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foam generator
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foot-operated generator
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fork generator
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fourpolar generator
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frame generator
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free-running blocking generator
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frequency-modulated generator
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fuel-cell generator
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fully water-cooled turbine generator
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function generator
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gas generator
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gas target neutron generator
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gas-turbine driven generator
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gate-pulse generator
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gate generator
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Gaussian noise generator
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gear generator
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general-purpose function generator
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gold-device pattern generator
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graphic generator
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grating generator
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Hall generator
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harbor generator
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harmonic generator
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heteropolar generator
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high-frequency generator
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high-voltage generator
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homopolar generator
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horizontal deflection generator
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horizontal generator
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horizontal sweep generator
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horizontal-bar generator
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horizontal-shaft generator
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hot-air generator
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hot-water generator
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house generator
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hydraulic turbine generator
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hydraulic vibration generator
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hydroelectric generator
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hydrogen filled water-cooled turbine generator
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hydrogen-cooled generator
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ice generator
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ice-forming aerosol generator
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impact-excited generator
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implicit-pole generator
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impulse generator
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impulse-noise generator
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inclined-plate wave generator
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induction generator
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inductor-type generator
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inductor generator
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insertion signal generator
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integrated drive generator
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interpole generator
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isotopic power generator
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key-pulse generator
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klystron generator
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laser artwork generator
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laser character generator
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lightning generator
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line generator
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linear sweep generator
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liquid nitrogen generator
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list generator
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look-ahead carry generator
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low-frequency generator
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low-voltage generator
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macro generator
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magnetoelectric generator
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magneto generator
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magnetonydrodynamic generator
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magnetostriction generator
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magnetostrictive vibration generator
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major-state generator
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manual number generator
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marker generator
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mask pattern generator
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mask generator
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master clock generator
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master time code generator
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mechanical ice generator
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mismatched generator
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mobile call generator
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mobile generator
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modulation generator
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molecular generator
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monodisperse aerosol generator
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motion command generator
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motion generator
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motor generator
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multifrequency generator
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multifrequency-burst generator
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multilevel interconnection generator
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multioperator welding generator
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multiple channel generator
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narrow strobe-pulse generator
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natural function law generator
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natural function generator
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neutron generator
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noise generator
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noise-current generator
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noise-spectrum generator
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noise-voltage generator
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nonsalient-pole generator
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notch generator
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number generator
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off-on wave generator
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once-through steam generator
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one shot generator
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optical generator
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parallel generator
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pattern generator
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peak generator
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permanent-magnet generator
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phase-locked generator
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photoelectric generator
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picture generator
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piezoelectric vibration generator
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pink noise generator
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plasma generator
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polyphase generator
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portable generator
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pressure generator
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profile generator
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program generator
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programmable clock generator
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propulsion generator
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pseudorandom noise generator
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pseudorandom number generator
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pseudorandom sequence generator
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pulse generator
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pulsed generator
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pulse-series generator
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quench generator
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radio-frequency generator
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ramp generator
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random-noise generator
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random-number generator
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range-marker generator
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raster signal generator
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reaction-type vibration generator
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redundancy check generator
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reference frequency generator
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reference generator
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reference smoke generator
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regenerative generator
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reheat steam generator
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relaxation generator
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reluctance generator
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report program generator
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resonant vibration generator
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reversed polarity generator
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ringing generator
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rotary pulse generator
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routine generator
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salient-pole generator
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sampling-pulse generator
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sawtooth generator
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scanning generator
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scan generator
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scintillation noise generator
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screen generator
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seismic-wave generator
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self-contained ice generator
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self-excited generator
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self-excited induction generator
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selsyn generator
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separately excited generator
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series generator
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service generator
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shading generator
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shaft-driven generator
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shaft generator
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shunts-wound generator
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shunts generator
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signal generator
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simulation generator
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single sideband generator
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single-line turbine generator
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single-phase generator
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single-shaft turbine generator
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slave generator
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software simulator pattern generator
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solar generator
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solid rotor generator
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spark generator
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special-effects generator
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special-effect generator
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speech generator
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speed governor axle generator
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spot wobbler generator
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spot wobble generator
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sprocket pulse generator
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square-law generator
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square-wave generator
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staircase generator
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standard-signal generator
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standby generator
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stationary generator
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steam generator
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steam-gas generator
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step generator
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step-wave generator
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straight bevel gear generator
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straight-tube steam generator
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stress-wave generator
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stroke-character generator
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subaudio-frequency generator
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subcritical steam generator
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submerged generator
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superconducting generator
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supersonic generator
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surge generator
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sweep generator
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swept-frequency generator
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symbol generator
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sync generator
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synchro generator
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synchronization pulse generator
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synchronized trigger generator
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synchronizing generator
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synchronizing-waveform generator
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synchronous generator
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tachometer generator
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tandem-pulse generator
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target generator
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TC generator
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television test-pattern generator
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television-picture generator
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television generator
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terrestrial solar generator
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test-line generator
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test-pattern generator
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test-tone generator
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text generator
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thermoelectric generator
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Thevenin's generator
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three-phase generator
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tidal generator
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time-base generator
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time-code generator
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time-mark generator
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time-pulse generator
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timing-pulse generator
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timing generator
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tone generator
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tone-burst generator
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torque command generator
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track generator
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train heating generator
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tray-type acetylene generator
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triangle generator
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trigger generator
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triggered blocking generator
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tube generator
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turbine-driven generator
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turbine generator
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twice-horizontal frequency generator
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ultrasonic generator
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umbrella-type water-wheel generator
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umbrella water-wheel generator
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unbalanced mass vibration generator
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undercar generator
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unipolar generator
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Van de Graaff generator
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Van der Pol generator
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variable-frequency generator
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variable-pulse generator
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vector generator
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vertical deflection generator
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vertical generator
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vertical sweep generator
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vertical-bar generator
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vertical-shaft hydro generator
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vibration generator
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video effects generator
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vinegar generator
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visual alignment generator
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voltage generator
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voltage-controlled generator
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vortex generator
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water-cooled turbine generator
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water-displacement contact-type generator
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water-displacement contact generator
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water-gas generator
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water-recession generator
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water-to-carbide-type generator
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water-to-carbide generator
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water-turbine driven generator
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water-turbine generator
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water-wheel type generator
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wave generator
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waveform generator
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wave-powered generator
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welding generator
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white noise generator
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wide strobe-pulse generator
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wind-driven generator
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window generator
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wind-powered generator
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yeast generator -
4 Newcomen, Thomas
SUBJECT AREA: Steam and internal combustion engines[br]b. January or February 1663 Dartmouth, Devon, Englandd. 5 August 1729 London, England[br]English inventor and builder of the world's first successful stationary steam-engine.[br]Newcomen was probably born at a house on the quay at Dartmouth, Devon, England, the son of Elias Newcomen and Sarah Trenhale. Nothing is known of his education, and there is only dubious evidence of his apprenticeship to an ironmonger in Exeter. He returned to Dartmouth and established himself there as an "ironmonger". The term "ironmonger" at that time meant more than a dealer in ironmongery: a skilled craftsman working in iron, nearer to today's "blacksmith". In this venture he had a partner, John Calley or Caley, who was a plumber and glazier. Besides running his business in Dartmouth, it is evident that Newcomen spent a good deal of time travelling round the mines of Devon and Cornwall in search of business.Eighteenth-century writers and others found it impossible to believe that a provincial ironmonger could have invented the steam-engine, the concept of which had occupied the best scientific brains in Europe, and postulated a connection between Newcomen and Savery or Papin, but scholars in recent years have failed to find any evidence of this. Certainly Savery was in Dartmouth at the same time as Newcomen but there is nothing to indicate that they met, although it is possible. The most recent biographer of Thomas Newcomen is of the opinion that he was aware of Savery and his work, that the two men had met by 1705 and that, although Newcomen could have taken out his own patent, he could not have operated his own engines without infringing Savery's patent. In the event, they came to an agreement by which Newcomen was enabled to sell his engines under Savery's patent.The first recorded Newcomen engine is dated 1712, although this may have been preceded by a good number of test engines built at Dartmouth, possibly following a number of models. Over one hundred engines were built to Newcomen's design during his lifetime, with the first engine being installed at the Griff Colliery near Dudley Castle in Staffordshire.On the death of Thomas Savery, on 15 May 1715, a new company, the Proprietors of the Engine Patent, was formed to carry on the business. The Company was represented by Edward Elliot, "who attended the Sword Blade Coffee House in Birchin Lane, London, between 3 and 5 o'clock to receive enquiries and to act as a contact for the committee". Newcomen was, of course, a member of the Proprietors.A staunch Baptist, Newcomen married Hannah Waymouth, who bore him two sons and a daughter. He died, it is said of a fever, in London on 5 August 1729 and was buried at Bunhill Fields.[br]Further ReadingL.T.C.Rolt and J.S.Allen, 1977, The Steam Engine of Thomas Newcomen, Hartington: Moorland Publishing Company (the definitive account of his life and work).IMcN
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