Patent ID: 6222143
Filing Date: 2001-04-24
Classification: H01H

Abstract:
A positive OFF toggle mechanism for a molded case circuit breaker having an ""ON"" ""OFF"" and ""TRIPPED"" condition, with the circuit breaker including a pair of contacts one of which is coupled to an operating mechanism having a pivoting member and a handle, the positive OFF toggle mechanism comprising:a lower toggle member having two ends, with a first end operatively coupled to the contact coupled to the operating mechanism and a second end coupled to a toggle pivot pin;an upper toggle member having two ends, with a first end having a cam finger with a cam surface, with the first end coupled to the toggle pivot pin and a second end in operative contact with a toggle pin mounted on the operating mechanism; and,a handle arm mounted on the pivoting member of the operating mechanism, with the handle arm having a catch surface arranged to engage the cam surface of the cam finger of the first end of the upper toggle when the circuit breaker is in a welded condition and the pair of contacts remain together.