Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 178
by screws and bushings in the manner shown, was or a long time typical of the Kellogg apparatus, but has now been ...dopted by several other manufacturers. This hook, moreover, is 156 AMERICAN TELEPHONE PRACTICE. entirely self-contained, and is, in that respect, a decided improve-ment over many… … FIG. 136.—MONARCH HOOK SWITCH. tact springs to any circuit requirements. In this the springs aremounted on a lug bent up from the base, the two outside springsbeing operated upon by a hard rubber cam carried on an upwardlyprojecting arm on the hook lever. This cam, when the hook isdepressed, wedges…
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