US PATENT SUBCLASS 200 / 51.17
.~.~ Rotatable-key switch

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200 /   HD   ELECTRICITY: CIRCUIT MAKERS AND BREAKERS

51 R  DF  COMBINED WITH OR ACTUATED BY CONNECTOR COUPLING {10}
51.14  DF  .~ Screw-coupling {3}
51.17.~.~ Rotatable-key switch

DEFINITION

Classification: 200/51.17

(under subclass 51.14) Devices in which the switch is operated by means of a rotatable key.