Patent ID: 6621403
Filing Date: 2003-09-16
Classification: H01H

Abstract:
An overload tripping device for a circuit breaker, comprising:a main bimetal for detecting an overload, a differential shifter mechanism linked with the main bimetal and having an output end, and a temperature-compensating bimetal device situated adjacent to the output end of the differential shifter mechanism to transmit an output signal from the differential shifter to a latch receiver of an opening-and-closing mechanism section and acting as a tripping lever, said temperature-compensating bimetal device having an intermediate portion in a longitudinal direction thereof to be journaled to swing thereat, one end facing the output end of the differential shifter, and an operating arm made of a light molding material attached to the other end thereof and adapted to face the latch receiver of the opening-and-closing mechanism.