Circuit breaker hook apparatus
AssigneeGeneral Electric Company
InventorsRoger N. Castonguay, Charles L. Jencks
Life of this patent
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Abstract
Compound hook apparatus for intercepting and holding circuit breaker contacts in a hooked open position against the closing force of charged operating mechanism springs includes a primary hook releasably latching an intermediate hook in a hooking position to fixedly dispose a pin in intercepting relation with a hook cam carried by a breaker movable contact assembly. The primary hook is articulated to unlatch the intermediate hook, freeing the latter to thereby release the movable contacts from their hooked open position.
Claims11
Hook apparatus for releasably holding the movable contacts of a circuit breaker in a hooked open position against the force of a charged mechanism spring acting to propel the movable contact assemblies to a closed position;
- said hook apparatus comprising, in combination:
- A. a hook cam carried by the movable contact assemblies;
- B. an intermediate hook in the form of a lever pivotally mounted intermediate its ends for movement between hooking and unhooking positions;
- C. a hook pin mounted adjacent one end of said lever;
- D. a latch pin mounted adjacent the other end of said lever;
- and
- E. a primary hook mounted for movement between latching and unlatching positions, said primary hook including latching means for engaging said latch pin to latch said lever in its hooking position such as to fixedly position said hook pin in interfering relation with the edge of said hook cam and thus intercept and hold the movable contact assemblies in their hooked open position, upon movement of said primary hook to its unlatching position, said latching means disengages said latch pin, freeing said lever for movement to its unhooking position and releasing the movable contact assemblies from their hooked open position.
Dependencies are inferred from the claim text.