Abstract: A circuit interrupter including separable main contacts, an operating mechanism interconnected with the contacts, and a housing in which the contacts and the operating mechanism are disposed. The housing includes a cover positioned on top of a base, the cover including first contact surfaces for contacting and mating with second contact surfaces of the base. The cover also includes a contact region. The operating mechanism includes a support member that is situated within the base and which has an upper surface with a raised region. The raised region is positioned to make contact with and pierce into the contact region before the first contact surfaces fully mate with the second contact surfaces.

Abstract: A circuit interrupter including a housing, separable main contacts disposed in the housing and rotatable between a contact open position and a contact closed position, and an operating mechanism disposed in the housing and interconnected with the contacts for rotating the contacts alternatively between the contact open position and the contact closed position. The operating mechanism includes a handle moveable by an operator between handle open and handle closed positions normally corresponding to and resulting in the contact open position and the contact closed position, with the handle including a protrusion. The operating mechanism further includes a crossbar assembly for rotating with the contacts as the contacts rotate between the contact open position and the contact closed position.

Abstract: A circuit interrupter including separable main contacts, an operating mechanism interconnected with the contacts, and a housing in which the contacts and the operating mechanism are disposed. The housing includes a cover positioned atop a base. The cover includes a recessed region in which are formed a first hole and a second hole. The first hole and the second hole extend through the cover and into the base, and the second hole extends through the base. A retainment device is positioned within the recessed region, and includes a first opening positioned above the first hole and a second opening positioned above the second hole. The second opening has an opening diameter. A first screw is inserted into the first opening and the first hole. A second screw is for inserting into the second opening and the second hole. The second screw includes a threaded portion having a first diameter and a non-threaded portion having a second diameter.