Electric switch with locking means

Claim 1

AN ELECTRIC SWITCH OF THE PUSH BUTTON TYPE PROVIDED WITH LOCKING MEANS FOR PREVENTING UNINTENTIONAL DEPRESSION AND ACTUATION OF THE SWITCH BUTTON, COMPRISING (A) A HOUSING PROVIDED WITH AN OPENING THEREIN SURROUNDED BY A BUTTON RETAINING STATIONARY RING, AN INWARDLY RADIALLY EXTENDING WEB FORMING A BEARING SURFACE IN THE HOUSING, (B) A SWITCH BUTTON ROTATABLY MOUNTED IN THE HOUSING OPENING AND PROVIDED ON ITS EXTERNAL FACE WITH MEANS FOR MANUALLY ROTATING THE BUTTON TO DEPRESSIBLE OR LOCKED, UNDEPRESSIBLE POSITONS, (C) DESIGNATIONS ON THE HOUSING ADJACENT THE OPENING COOPERATING WITH THE MANUALLY ROTATING MEANS WHICH INDICATE THE DEPRESSIBLE AND LOCKED POSITIONS OF THE BUTTON, (D) BEARING MEANS ON THE BUTTON CONTACTED BY THE RETAINING RING AND ENGAGING THE BEARING SURFACE ON THE WEB FOR PREVENTING DEPRESSION OF THE BUTTON WHEN IN LOCKED POSITION, (E) THE SAID BEARING SURFACE HAVING A RECESS THEREIN FOR RECEIVING SAID BEARING MEANS ON THE BUTTON AND PERMITTING DEPRESSION OF THE BUTTON WHEN ROTATED TO UNLOCKED POSITION, (F) A PAIR OF FIXED CONTACTS MOUNTED IN THE HOUSING, AND (G) A CONTACT MEMBER MOUNTED ON THE BUTTON WITHIN THE HOUSING AND ROTATABLE WITH THE BUTTON TO ENGAGE THE FIXED CONTACTS WHEN THE BUTTON HAS BEEN ROTATED TO UNLOCKED POSITION AND DEPRESSED.