Ivanhoe metal reflectors and fittings for industrial illumination. Catalog no. 276. (1918)
General Electric Company. Ivanhoe-Regent Works · General Electric Company: Ivanhoe-Regent Works · leaf 32
It Works The secret of the convenience and depend-ability of the arm lies in the construction ofthe two discs which form each joint. Thesedi^cs are made of cast iron, with the centerhollowed out so that one disc comes into con-tact with the other only at the extreme outeredge. The two discs are… … 29 ( ANDERSON SELF I 1111I ii } ADJUSTING ARMS motion, yet remains constant for years without readjustment. Thediscs are strong, and the weight of every part of the arm is carefullycalculated to produce a well-balanced, durable fixture. Adjustment The proper tension is put on the discs before they…
Electric lighting · Interior lighting fixtures, lamps, and ballasts
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