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US 5,262,744 AGranted
Molded case circuit breaker multi-pole crossbar assembly
AssigneeGeneral Electric Company
InventorsDavid Arnold, Roger N. Castonguay
Life of this patent
Estimating the term…
Abstract
A modular crossbar arrangement for molded case circuit breakers allows a plurality of contact arm assemblies to be interconnected from a single modular unit. To provide increased acceleration to the movable contact arms a contact arm accelerator lever interfaces with the contact arm and crossbar assembly. To promote further acceleration of the movable contact arms to their closed positions, the movable contact arms in a multi-pole circuit breaker are staggered with respect to their rotational alignment within each pole on the crossbar assembly.
Claims5
A molded case circuit breaker comprising:
- a circuit breaker case and cover, said case including a plurality of separate compartments;
- a pair of contacts within each of said compartments for interrupting current within a protected circuit;
- an operating mechanism within one of said compartments and arranged for separating said contacts upon occurrence of an overcurrent condition within said protected circuit;
- a plurality of movable contact arms one of said movable contact arms being arranged within each of said compartments and having one of said contacts affixed to one end and a pivot pin arranged at an opposite end;
- a plurality of movable contact arm supports one of said movable contact arm supports being arranged within each of said compartments pivotally-supporting an associated one of said movable contact arms;
- and
- a plurality of separate crossbar modular units, one of said crossbar modular units connecting between adjoining pairs of said contact arm supports, each of said movable contact arm supports comprises a U-shaped metal piece having a pair of side arms joined at a top by means of a crosspiece and each of said crossbar modular units comprises a central plastic barrier unit integrally-formed between a pair of outer cylinders.
4 more elements
Dependencies are inferred from the claim text.