Cooper Industries, Inc.

Mcgraw-edison Company

J Howard Shaw

Lawrence M Burrage

David W Anderson

James R Marek

A flipper is described for a fuse of the type having a generally cylindrical fuse tube, a fusible element within the tube and a fuse leader, the fuse leader having two ends with one of the ends connected to the fusible element disposed within the tube and with the other end of the leader adapted to be connected to a fixed terminal such as one of the two terminals of a power factor capacitor. In one embodiment, the flipper has two elongated arms disposed adjacent one another, a helical torsion spring at one end of each arm, an eyelet connecting together the other end of the arms and adapted to pass through the fuse leader, and a hook or similar connection carried by the springs to mount the flipper assembly to the associated terminal to which the free end of the fuse leader is joined. The flipper assists in the extraction of the leader from the fuse tube and provides positive restraint of the leader after the fuse has blown. Several specific embodiments are described wherein the lateral displacement of the torsion springs is controlled, the lateral displacement of the leader arms is varied, and the angular relationship between the flipper arms and the terminal connection is changed.

Capacitor fuse leader flipper

A power class fuse comprises an insulative canister having a female load break contact at a closed end of the canister and a male load break contact, coupled electrically to a fuse element. The male load break contact is inserted into the canister for engagement with the female load break contact to complete a circuit through the fuse element. An arc gas control device including a pair of spaced parallel plates each having apertures formed therethrough and filter material sandwiched between the plates, is mounted on the male load break contact. The arc gas control device forms a partition in the canister upon insertion of the male load break contact thereinto. Arc gas generated upon engagement of the male and female load break contacts passes through the control device into the canister interior surrounding the fuse element to reduce back pressure in the canister, while metallic particles and other contaminants which could produce flashovers within the canister, are trapped in the filter material.

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Racine, WI, United States of America

J Howard Shaw