Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 177
is raised, and the signaling circuit when the lever is depressed.This switch has a distinct advantage over most other types, inthat the lever itself and the restoring spring, 5, form no part of the LOCAL BATTERY SUB-STATION EQUIPMENT. 155 circuit, and, therefore, no provision has been made to… … =^^ FIG. 134.—KELLOGG HOOK SWITCH. adapted to meet the requirements of almost any circuit, it beingvery easy to add more springs or to so arrange them that theircontacts will be made and broken in a definite order upon the raisingor lowering of the hook.
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