Hawkins electrical guide ... : questions, answers & illustrations : a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications ; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833-1928 · New York : T. Audel & Co. · leaf 338
and plunger, or theampere turns on the solenoid must be so adjusted that an arc of proper length is estab-lished when equilibrium is reached. 1. Manually operated; 2. Automatic. The feeding of carbons may be done by hand, as is the case insome stereopticons using an arc, but for ordinary… … SUPPORT ARM FOR LOWERCARBON MOVABLECARBON SDffORT Fig. 3,338.—Elementary shunt control lamp. In operation most of the current flows throughthe heavy wire connected in series with the carbon, the balance flowing through thsshunt solenoid. Normally, when the current is off, gravity causes the plunger…
Electrical engineering
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