Abstract: An electrical security apparatus includes an enclosure in which there is mounted an electrical receptacle which may be connected to a source of electrical power via its own power cord and plug. The enclosure is proportioned to receive the end of the power cord and the power plug of independently operated electrical device by plugging it into the electrical receptacle which makes direct connection to the power source provided in the apparatus through its power cord and plug. A keylock, operated by a removable key, is provided on the exterior of the enclosure. In the first position, the keylock, operated by a removable key, allows the top panel of the enclosure to be opened and closed. In the second position, the keylock locks the top panel and prevents removal of the power plug of the independently operated electrical device therefrom. In the third position, the keylock operates a switch to allow current to flow from the power source to the independently operated electrical device.

Abstract: A rotary switch includes a contact bar movable between a switch-open and a switch-closed position and a rotatable circular cam member controlling the movement of said contact bar. Spring means urges the contact bar into operative engagement with the surface of said cam member. The cam member is rotatably contained within a cavity in the switch housing, the cavity having a wall surface guiding the cam member during rotation of the latter. Biasing action of the spring means upon said contact bar urges the cam member against the wall surface of said cavity, with said wall surface serving as the only bearing surface for said cam member during rotation of the latter. A pin and slot coupling is also provided as an integral portion of the cam member and housing to limit rotary movement of said cam member between precise switch-open and switch-closed positions.