Circuit interrupter with improved molded insulating housing formed with vent passage means

Claim 1

A circuit interrupter comprising a molded insulating housing, a circuit-interrupter mechanism supported in said insulating housing, said circuit-interrupter mechanism comprising a pair of cooperable contacts operable to open and close an electric circuit, said insulating housing comprising a molded generally planar end wall at one end thereof and molded projection means extending from said end wall to form a cavity at said one end, said molded projection means comprising generally planar spaced generally parallel surfaces that extend from said end wall along generally parallel planes that are generally normal to the plane of said end wall which generally parallel surfaces serve as cavity side wall means providing side walls of said cavity, said end wall having a thickness dimension, and said end wall being molded to form a vent passage through the thickness thereof which vent passage extends from the inner surface of said end wall to the outer surface of said end wall toward one of said side walls of said cavity.