Circuit breaker with increased electrical spacing

Details Circuit breaker with increased electrical spacing Circuit breaker with increased electrical spacing

1982-04-05

1983-06-21

Shepperd, John W.

Electricity: circuit makers and breakers

Electric switch details

Cases and bases

200293, 200306, H07H 904

Patent

active

043895557

ABSTRACT:
A circuit breaker in which the case comprises two half-cases abutting together to jointly form the case. A handle link includes a handle with a portion extending through the half-cases. The half-cases have abutting, interfitting tongue and groove portions to increase the creepage and clearance distances from outside the circuit breaker to the closest electrically energized parts within the circuit breaker. Further the handle link and the half-cases have a pivotally semi-circular interfitting tongue and groove connection. The abutting, interfitting tongue and groove portions of the half-cases are disposed on both sides of said semi-circular connection and pivotally adjacent thereto so as to form a tongue and groove connection at the opening of the case through which the handle extends and on either side thereof. Also, the handle link has pintles pivotally extending into recesses provided therefor in the half-cases.

REFERENCES:
patent: 3144506 (1964-08-01), Gunthel, Jr.
patent: 3422235 (1969-01-01), Camp
patent: 3571545 (1971-03-01), Haderer
patent: 3632927 (1972-01-01), Gribble
patent: 3655925 (1972-04-01), Lincoln et al.
patent: 3739122 (1973-06-01), Pierzchala
patent: 3786380 (1974-01-01), Harper
patent: 4075446 (1978-02-01), Aadahl
patent: 4245274 (1981-01-01), MacDonald et al.
patent: 4319107 (1982-03-01), Haskins
patent: 9112270 (1978-09-01), Rys

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