Motion picture projection; an elementary text-book (1921)

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MOTION PICTURE PROJECTION 149 Plate No. 5, illustrates switchboard and connection for equipment of two projection machines, two meters in the booth and one for the orchestra pit. ROBIN ELECTRIC TIME SYSTEM PLATE 5 RI6HT MACH INOOTOR 1-niitr SWITCH StflTCH BCMRD //Die }0 HOT CMfHtt CAtLC LCN KfBIHS ClMfMA [UCTItlC TIME DICATORS Wff^ftO GENERATORS ATf Sc* i £ rrre \ C4SLC JOKTH l*rt fit CAC/ftlWC* Two Machines, Three Meters and Switchboard