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 325
amps without regulating mechanism.These include lamps with converging carbons,whose object was to dispense with the regulatingmechanism, but which in some cases have aboutas much regulating mechanism as any of theordinary arc lamps. Lamp, Contact. A lamp depending for itsaction on loose contact… … E ■ Lamp, Differential Arc. An arc lamp, the ■Ma. regulation of the distance between whose carbons depends on the differential action of two separateelectrical coils. The diagram illustrates the prin-ciple. The two carbons are seen in black; theupper one is movable. The current arrives at y;/.It…
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