Electrical controls

Claim 1

A ROTARY SWITCH COMPRISING A HOLLOW CYLINDRICAL HOUSING, SAID HOUSING AT ITS UPPER END HAVING A COLLAR SECURED THERETO, SAID COLLAR HAVING A CENTRAL APERTURE THEREIN, A CONTROL SHAFT, A KNOB UNITED TO ONE END OF SAID CONTROL SHAFT, SAID KNOB INCLUDING A DEPENDING SKIRT ENCLOSING A SUBSTANTIAL PORTION OF SAID HOUSING, SAID SHAFT EXTENDING THROUGH SAID CENTRAL APERTURE INTO SAID HOUSING, A CONTACT ASSEMBLY IN SAID HOUSING, SAID ASSEMBLY BEING KEYED TO THE FREE END OF SAID CONTROL SHAFT, AN INSULATIVE DISC CLOSING THE LOWER END OF SAID HOUSING, AN ELECTRICALLY CONDUCTIVE RING SECURED ON THE INTERIOR SURFACE OF SAID DISC, A PLURALITY OF ELECTRICAL CONTACTS IN SAID HOUSING CONCENTRIC WITH SAID RING, SAID ELECTRICAL CONTACTS BEING EMBEDDED IN SAID DISC, EACH OF SAID CONTACTS HAVING A RECESS THEREIN, SAID CONTACT ASSEMBLY INCLUDING A FIRST ARM RIDING UPON SAID RING AND A SECOND ARM ADAPTED TO BEAR UPON SAID ELECTRICAL CONTACTS, SAID SECOND ARM BEING PROVIDED WITH MEANS ADAPTED TO COOPERATE WITH THE RECESSES IN SAID CONTACT WHEREBY SAID SECOND ARM AND SAID CONTACTS FUNCTION AS DETENTS, MEANS ON SAID DISC PROVIDING EXTERIOR ELECTRICAL CONNECTION TO SAID RING AND SAID CONTACTS, SAID HOUSING PROVIDING AN EXTERNAL ABUTMENT EXTENDING BEYOND THE PORTION OF THE HOUSING BELOW THE ABUTMENT TO PROVIDE AN EXTERNAL FACE IMMEDIATELY BELOW THE DEPENDING SKIRT, AND MEANS ON THE LOWER END OF SAID HOUSING FOR CLAMPING AN INTERPOSED MEMBER AGAINST THE EXTERNAL FACE OF SAID ABUTMENT.