Abstract: A molded case circuit breaker is provided with a pivotally mounted contact arm assembly, formed as a clinch joint. The contact arm assembly is a bifurcated assembly formed from two coextensive members fastened together at one end defining a surface for carrying a movable main contact. The other end of the members is bent outwardly defining spaced apart arm portions for receiving a pivot bracket. The pivot bracket is provided with an aperture and aligned with apertures in the spaced apart portions for receiving a pivot pin and defining a pivot axis. The pivot bracket is rigidly connected to a load conductor. The current that flows through the contact arm is transferred to bosses integrally formed adjacent the apertures in the pivot bracket. Screw adjustable spring members are provided for adjusting the friction and the electrical resistance between the contact surfaces of the contact arm assembly and the bosses.

Abstract: A high efficiency bistable tractive solenoid device includes a magnetic housing having an interior cylindrical wall supporting stacked electromagnetic parts including a pair of coils and plural end pole pieces having inner diameters which are concentrically arranged to define a center bore. A double-acting plunger has an armature which is received by the center bore and is terminated by shaft ends having reduced diameters and being journalled for sliding movement in end plates also assembled within the housing interior wall with one of the shaft ends carrying a cam having a detent for latching the plunger in place.