Receptacle plug to protect appliance theft

Claim 1

IN COMBINATION, A SOCKET HAVING A HOT WIRE TERMINAL AND A GROUND WIRE TERMINAL FOR CONNECTING TO HOT AND GROUND CONDUCTORS, RESPECTIVELY, OF AN ELECTRIC POWER MAIN, SAID SOCKET HAVING A PAIR OF OPENINGS THEREIN FOR RECEIVING SPACED CONTACT PINS AND AN APERTURE EXTENDING THEREIN, MEANS INCLUDING A RESILIENT LEAF SPRING ATTACHED TO SAID HOT WIRE TERMINAL AND LOCATED DIRECTLY BELOW SAID APERTURE, A CONTACT BLADE ENGAGEABLE BY SAID LEAF SPRING, A WARNING DEVICE CONNECTED TO SAID CONTACT BLADE AND TO SAID GROUND TERMINAL, AND A PLUG FOR SAID SOCKET HAVING A PAIR OF SPACED CONTACT PINS FOR MAKING CONTACT WITH SAID HOT WIRE AND GROUND WIRE TERMINALS AND AN ACTUATOR PLUNGER FOR PASSING THROUGH SAID APERTURE IN SAID SOCKET FOR DEPRESSING SAID LEAF SPRING SO AS TO INTERRUPT THE CIRCUITRY BETWEEN THE HOT WIRE TERMINAL AND SAID ALARM DEVICE, WHEREBY WHEN SAID PLUG IS REMOVED FROM SAID SOCKET, THE CIRCUITRY BETWEEN SAID HOT WIRE TERMINAL AND SAID ALARM DEVICE IS COMPLETED TO GIVE AN INDICATION OF THE REMOVAL OF SAID PLUG.