Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 177
=^^ 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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