Abstract: A C-shaped clamp having elongated flanges at its ends defining the open portion of the "C". A bolt is inserted through holes provided in the flanges. A nut tightened on the bolt against one of the flanges compresses the C-shaped clamp. A U-shaped key slideably fitted in a lengthwise slot in the threaded end of the bolt engages the inside wall of one flange and the outwardly facing side of the nut and pulls the flanges apart when the nut is loosened on the bolt thus expanding the C-shaped clamp.

Abstract: Battery disconnect apparatus (1) for interrupting flow of power through an electrical circuit. A circuit breaker (3) is connected between a battery (B) and one or more components connected in the circuit. A switch (23) holds the circuit breaker in its closed position and moves the circuit breaker from its closed to an open position thereby interrupting the circuit. A force responsive mechanism 37 triggers the switch in response to extraordinary forces being exerted on a vehicle in which the battery and components are installed.