Elementary lessons in electricity and magnetism (1906)
Thompson, Silvanus P. (Silvanus Phillips), 1851-1916, Schwetzky, Otto H. L. [from old catalog] · Chicago, Thompson & Thomas · leaf 362
boscq;in this lamp the carbon-holdersare propelled by a train ofclockwork wheels actuated bya spring. An electromr/jnetat the base, through which thecurrent runs, attracts an arma-ture and governs the clock-work. If the current is toostrong the armature is drawn down, and the clockworkdraws the… … \ Hg; X38. CHAP. viL] ELECTRICITY AND MAGNETISM. 337 Clockwork arc lamps have also been devised by Serrinand by Crompton, in which the weight of the carbon-holders drive the clockwork mechanism. (^) Break-wheel Lamps,—Jaspar and Crompton havedevised mechanism for regulating the rate of feedingthe…
Electricity · Magnetism
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