Circuit breaker closing mechanism

Details Circuit breaker closing mechanism Circuit breaker closing mechanism

1976-10-22

1979-03-27

Tudor, Harold J.

Electricity: circuit makers and breakers

Liquid contact

Time delay

74 2, 185 40R, H01H 330

Patent

active

041467655

ABSTRACT:
A circuit breaker the moving contacts of which are closed by a charged spring or plurality of springs in which the circuit breaker is of minimum size for any given application and maximum simplicity in manufacture. The circuit breaker closing system is a cam closed system in which the closing cam acts also as a prop latch for supporting the spring operating mechanism in charged position. The cam follower path is determined by three cam surfaces between which the closing forces are transmitted through free floating rollers; this obviates the need for toggle links for the transmission of forces or the guiding of the cam follower rollers. This arrangement, by permitting the distribution of the variable mechanical advantage of a cam slope among three members, instead of building it into just one member allows the use of a smaller diameter primary closing cam; it also permits an application of closing forces appropriately tailored to the requirements of each circuit breaker.

REFERENCES:
patent: 3794792 (1974-02-01), Wilson
patent: 3835275 (1974-09-01), Preuss
patent: 3849619 (1974-11-01), Patel

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