Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 356
Fig. 10. 297 J6 ELECTRIC LIGHTING The feeding of the carbons may be done by hand, as is thecase in some stereoptieons using an arc, but for ordinary illumina-tion the strikincr and maintaining of the arc must be automatic.It is made so in all cases by means of solenoids acting against theforce of… … of such mechanisms, but a few only will be described here. Theymay be roughly divided into three cla.sses; 1. Shunt Mechanisms. 2. Series Mechanisms. 3. Ditierential Mechanisms. In Shunt Lamps, the carbons are held apart before the cur-rent is turned on, and the circuit i^ closed throucrh a…
Architecture · Building · Carpentry
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