The standard electrical dictionary : a popular encyclopaedia of words and terms used in the practice of electrical engineering (1898)
Sloane, T. O'Conor (Thomas O'Conor), 1851-1940 · London : Crosby Lockwood and Son · leaf 445
repetition of the ascent of themercury, is expelled, through D. Themercury is again lowered, producing afurther exhaustion, and the process isrepeated as often as necessary. Push=button. A switch for closing a circuit by means of pressureapplied to a button. The button is provided with a spring, so… … Fig. 273.Swinburnes Air Pump. STANDARD ELBCTRICAIy DICTIONARY. 441 nected to one of the wires, or by the stem of the button goingbetween two springs, not in contact, forcing them a little apart tosecure good contact, and thereby bridging over the space betweenthem. Pyro=electricity. A phemenon by…
Electricity
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