Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 372
ated, namely, glower, heater, cut-outand ballast, are mounted in a suitable manner, the smaller lampshaving but one glower and arranged to fit an incandescent lampsocket, while the larger types have as many as six glowers and arearranged to be supported in a manner similar to arc lamps. Allof the… … Fig. 21. contacts of the cut-out 4, to the heater circuit 5, then to the con-tacts 4 and to terminal 2. When the glowers become hot enoughto conduct, the current divides at 1, part of it going through the
Architecture · Building · Carpentry
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