Abstract: Apparatus which is well suited for positioning a pin to immobilize a circuit breaker switch comprises an elongated base member and an aperture-defining means, such as a wire or plate, fastened to the base member. The base member is elongated and has a longitudinal axis, an upper face, and a transverse groove extending across the upper face. The defining means is positioned across the transverse groove and in a plane parallel to the longitudinal axis of the base member. A portion of the aperture defined by the aperture-defining means is positioned in alignment with the transverse groove. A pin having longitudinal axis, a preferably generally rectangular or square cross section, and a plurality of longitudinally spaced apart grooves is positioned in the groove of the base member and through a portion of the aperture to immobilize a breaker switch positioned alongside the elongated base member. A lock is also passed through the aperture to block extrication of the pin.

Abstract: Disclosed is apparatus well suited for positioning a pin to immobilize a circuit breaker switch. The apparatus comprises an elongated base member and an aperture-defining means, such as a wire or plate, fastened to the base member. The base member is elongated and has a longitudinal axis, an upper face, and a transverse groove extending across the upper face. The defining means is positioned across the transverse groove and in a plane parallel to the longitudinal axis of the base member. A portion of the aperture defined by the aperture-defining means is positioned in alignment with the transverse groove. A pin having longitudinal axis, a generally rectangular or square cross section, and a plurality of longitudinally spaced apart, circumferentially extending grooves is positioned in the groove of the base member and through a portion of the aperture to immobilize a breaker switch positioned alongside the elongated base member. A lock is also passed through the aperture to block extrication of the pin.

Abstract: A safety device for electrical circuit breakers has a base member adapted to be mounted adjacent at least one and preferable a column of circuit breakers. The base member has a plurality of parallel, spaced, transverse grooves. A cover assembly is hingedly attached to one end of the base member and has a like plurality of protrusions depending therefrom, each protrusion aligned to be received in a respective groove of the base member. A plurality of locking pins, each locking pin having an elongated body portion and an integral breaker engaging head, the body portion having a plurality of spaced apart, longitudinally extending, elongated slots, are adapted to be selectively received in the grooves of the body member. The protrusions of the cover assembly are received in respective slots in the locking pins to secure the locking pins in place in the base member.