Patent ID: 6252480
Filing Date: 2001-06-26
Classification: H01H

Abstract:
A moving contact and crossbar assembly for a molded case circuit breaker, the circuit breaker having a housing, an operating mechanism including an intermediate latch, a trip mechanism, a handle, a line terminal, a load terminal and a cover, the moving contact and crossbar assembly comprising:a crossbar having a formation pivotally mounted in the housing, with the formation having two spaced apart sidewalls, with each side wall having a first cam surface, a cam node, a second cam surface and a bearing surface; and,a moving contact arm assembly mounted in the formation and mechanically coupled to the operating mechanism and coupled to the load terminal, with the moving contact arm comprising:a first end and a second end and includes a first member and a second member, with each member configured to define an open space between the members at the first end and coupled together at the second end, wherein a contact arm pressure spring is coupled to the pivot pin and the roller pin within the open space and a load contact is mounted on the second end;a pivot pin positioned between the sidewalls and in rotational contact with the bearing surface of each side wall;a slot provided in the movable contact arm, with the movable contact arm positioned between the sidewalls and coupled to the pivot pin; and,a roller pin slidingly mounted in the slot and in operative contact with the first and second cam surfaces and the cam node of each side wall.