Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. (1916)
American Technical Society · Chicago : American Technical Society · leaf 246
. It binds on the carbonand raises it, thus lengthening the arc. When the arc burns to such alength as to cut down the current by the increase of resistance, thecoil releases the core, the clutch returns to the position shown, andthe upper carbon slips down until current is increased sufficientlyto… … Fig. 115. Section of Incandescent Headlight 213 118 ELECTRIC RAILWAYS incandescent headlights is employed. The two lamps may be conven-iently located in the same reflector, although in this arrangement it isimpossible to have both lamps at the focus of the reflector. A two-wayswitch permits the…
Electrical engineering
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