Molded case circuit breaker with reduced contact mounts

Details Molded case circuit breaker with reduced contact mounts Molded case circuit breaker with reduced contact mounts

1984-11-16

1986-05-13

Marcus, Stephen

Electricity: circuit makers and breakers

Liquid contact

Time delay

200327, H01H 346

Patent

active

045888787

ABSTRACT:
A molded case industrial circuit breaker is provided with a shortened contact separation distance upon manual operation to reduce the stresses imposed upon the breaker operating mechanism when the breaker is manually operated to open or close the contacts. A camming surface is provided on the cradle operator to provide a stop for the toggle pin both upon opening as well as upon closing the contacts. The decreased separation which occurs between the contacts upon manual operation allows a savings in the amount of contact braid material as well as reducing the size of both the fixed and movable contacts. The decreased stresses on the mechanism correspondingly allows for a reduction in the material strength and mass of the breaker flexible connectors, operating springs, and contacts.

REFERENCES:
patent: 3003046 (1961-10-01), Torre
patent: 3155803 (1964-11-01), Klein et al.
patent: 3158716 (1964-11-01), Koval
patent: 3265833 (1966-08-01), Murphy
patent: 3286067 (1966-11-01), Menickella et al.
patent: 3621189 (1971-11-01), Link
patent: 4001742 (1977-01-01), Jencks et al.
patent: 4245140 (1981-01-01), Jencks et al.

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