Henry and Hora's modern electricity; a practical working encyclopedia (1915)
Henry, James. [from old catalog], Hora, Karel Jan, 1881- [from old catalog] joint author · Chicago, Laird & Lee, inc. · leaf 238
resistance of the arc becomesgreater, the current through the shunt magnet increases, caus-ing it to feed down the carbon and keep the arc at the properlength. As the length of the arc decreases, its resistancedecreases and the shunt magnet receives less current, so thatthe feeding is checked. When… … 236 MODERN ELECTRICITY clutch lifted by the spring which is connected to the levermechanism, so that the proper length of arc is thus main-tained at all times. Another form of arclamp, shown in fig. 99,has a much simplermechanism, requiringbut a single electro-magnet, which is inseries with the…
Electrical engineering
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