Bauhaus-Universität Weimar

Titel:
Optic Projection: Principles, Installation and Use of the Magic Lantern, Projection Microscope, Reflecting Lantern, Moving Picture Machine
Person:
Gage, Henry Simon and Henry Phelps Gage
PURL:
https://digitalesammlungen.uni-weimar.de/viewer/image/lit39438/513/
Ch. XIII] 
INSTALLATION OF ARC LAMPS 
SOS 
Outlet 
Lamp House 
Condenser 
Supply Wires 
Arc Lamp 
Water 
VA I // 
Rheostat w3 
Fig. 270. Wiring of the Arc Lamp for Projection. 
For full explanation, see fig. 3 and fig. 40. 
ing post of the rheostat a suitable wire is carried to the positive 
binding post of the arc lamp, that is to the binding post for the 
upper carbon. This puts the rheostat, or other balancing device 
in one wire, or in series, not in parallel, or across both the wires of 
the circuit. 
In securing the ends of the wires to the binding posts, scrape 
them, and twist the strands, then make a loop and put under the 
binding screw of the switch as described for the attachment cap. 
Usually for the rheostat, and the arc lamp, the wires are twisted 
and kept straight, then inserted into a hole, and a set screw turned 
down upon them. 
If flexible cord or cables are used for these connections, the wires 
on the end, after being scraped clean should be twisted and 
soldered, then none of the strands will escape to lessen the carrying 
capacity, or possibly to make a short circuit.
        

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