Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 535
d as the spring-jack which is used in con-nection with nearly all of the Western Electric common battervcircuits. In Fig. 359 is shown a strip of two-point jacks, which is of the MULTIPLE SWITCH-BOARD APPARATUS. 513 type used in nearly all of th,e two-wire switch-boards installed bythe Kellogg… … FIG. 359.—STRIP OF TWENTY KELLOGG TACKS. ing rearwardly-projecting portions for facilitating the soldering ofthe wires. The framework of this jack is composed mainly of twohard-rubber strips, the front strip being drilled to receive the tubu-lar portion of the sleeve contacts, while the rear strip…
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