Abstract: A circuit breaker having a pivotal movable contact arm (6) operated between open and closed positions with a stationary contact (14c) by an overcenter drive spring (8) in response to pivotal movement of a manual operating handle (4). A latch lever (10) is provided to locate the other end of the drive spring (8) and is releasable upon overload currents to carry the point of connection (10d) of the drive spring and latch lever essentially downward in line with the line of action of the drive spring to quickly reduce its force and stored energy, thereby quickly reducing the contact pressure provided thereby and enabling constriction and/or repulsion forces to separate the contacts (6c,14c). A further amount of movement of the latch lever (10) carries the point of connection (10d) of the drive spring and latch lever across the pivot plane of the movable contact arm (6) to separate the contacts. The latch lever (10) is released by a pivotally supported latch arm (12).

Abstract: A spring jaw fuse clip (18) having a backup spring (22) encircling the fuse clip and bearing inwardly upon the outer surfaces of the legs (18b) of the fuse clip, the spring being attached to the fuse clip by engagement of portions (22d) thereof with horizontal (18e) notches in the edges of the fuse clip legs to prevent displacement of the spring with respect to the clip, and having a insulating fuse puller loop (20) disposed within a pair of slots (18c) open to the upper ends of the fuse clip legs for linear movement therein. A rib (20c) is provided on the fuse puller loop in the area between the fuse clip legs to prevent tilting or displacement of the fuse puller loop with respect to the fuse clip and to facilitate insertion of the fuse (8) blade therein by camming the legs (18b) outwardly to the width of the fuse blade upon being displaced to its outermost position in said clip.