Abstract: A mechanical interlock socket outlet includes a female receptacle mounted to a face plate, a breaker box, a toggle switch for activating the breaker box, and an actuating rod for operating the toggle switch. A locking arm is provided for engaging the actuating rod and has a first position and a second position. A safety release saddle plate is engaged to the actuating rod. The plate has a locking arm release portion such that movement of the plate will contact the locking arm and move the locking arm from the first to a second position. Springs are connected between the plate and the face plate, and connected to a portion of the saddle plate adjacent a top portion of the plate. The springs act to return the saddle plate and toggle switch to a locked position. A push pin is provided to move the saddle plate.

Abstract: A receptacle for receiving a plug includes a frame and an electrical connector mounted on the frame. A switch is electrically connected to the connector and can disconnect it. A manually operable interlock has an on and off position. This interlock is mounted on the frame for operating the switch to apply power to the connector after the securing of the plug into the connector. The interlock has a grasping device for grasping the plug on a rearward external surface of the plug. The grasping device prevents the removal of the plug in response to the interlock being placed in the on position.