Hallberg, Josef Henrik, 1874- · New York city, The Moving picture world · leaf 95
should be smaller than thefirst main switch and fuse. The object of this differencein the sizes of the fuses on the main switches is to make itimpossible for the exit lights to go out, in case thereshould be a short circuit on the panel board or in the op-erating room, which might blow the fuses on… … 7 ~\ EXIT LAMP CIRCUIT SIDE LAMP CIRCUIT MAIN SWITCHNO. 2 LOCATED IN\TICKET BOOTHV, OR IN/FRONT OF THEATRE TO SIGN TO M.P. MACHINE TO SPOT OR STERIO LAMP LP—~ AGE PANEL BOAR J TO EXHAUST FANTO WALL FANSTO CEILING FANS SWJTCH BOX NO. 2 OPERATING ROOM CIRCUIT FOR AUDITORIUM CEILING LAMPS Fig. 44…
Motion picture theaters · Electric lighting
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![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer03inte-634-374.webp)
