Abstract: For use in a welded resistor grid assembly moving a plurality of generally parallel, relatively think plate-like metal elements disposed between a pair of spaced-apart insulating support members having a plurality of slotted openings in their opposing sidewalls, a metal element having a substantially rectangular plate-like body of predetermined width, a coplanar flat segment of the same width at one end of the body, a laterally offset flat segment of the same width at the opposite end of the body, the upraised side of the later segment having a flat surface adapted to be joined by a seam weld to the flat surface of the other side of the coplanar segment of another duplicate element after two such elements are placed side by side with opposite orientation so that the offset flat segment of one adjoins the coplanar flat segment of the other, and a border segment of the same width contiguous and generally coplanar with a first one of the flat segments, the border segment being adapted to enter a slotted opening

Abstract: A bi-stable magnetically latched electromagnetic device has an E-shaped frame, a rocker-type armature spanning the distal ends of the two outer legs of the frame, with the mid-region of the armature being pivotally supported on the distal end of the center leg for reciprocal movement between alternative stable positions, and first and second electrically interconnected helical coils each encircling a magnetizable core in a different one of the two interleg spaces of the frame. First and second permanent magnets are disposed between the base of the frame and the first and second coils, respectively, and first and second magnetic flux diverters are interposed between the respectively associated coils and magnets. The coils are connected to relatively positive and negative control power terminals via selectively operative means for providing alternative first and second current paths.

Abstract: An asbestos-free, unitary insulating member comprises two juxtaposed layers: a first layer of refractory material, and a thicker layer of thermoset resin filled with glass fibers. The first layer was fully cured separate from the second layer, and its inboard side has a relatively coarse surface. The two layers were joined to one another concurrently with the resin in the second layer being cured under pressure in a heated mold, whereby some of the resin penetrates the interstices of the coarse surface of the first layer to form a strong interlayer bond.

Abstract: A static trip unit is comprised of a current transformer module and an electronic programmer module physically and electrically mated together for incorporation in a molded case industrial circuit breaker. Current transformer modules and programmer modules are separately interchangeable to change breaker current ratings and functional capabilities. A trip interlock is included to prevent breaker closure in the absence of either the trip unit or the trip solenoid.

Abstract: A static trip unit is comprised of a current transformer module and an electronic programmer module physically and electrically mated together for incorporation in a molded case industrial circuit breaker. Current transformer modules and programmer modules are separately interchangeable to change breaker current ratings and functional capabilities. A trip interlock is included to prevent breaker closure in the absence of either the trip unit or the trip solenoid.