Stored energy circuit breaker

Details Stored energy circuit breaker Stored energy circuit breaker

1976-12-30

1979-08-28

Hart, Ro E.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200153SC, H01H 360

Patent

active

041662059

ABSTRACT:
A circuit breaker having stationary and movable contacts operable between open and closed positions with the movable contact being biased in an open position. The movable contact is mounted to a contact and spring holder which engages one link in a toggle means. The first link is connected to a second link which has a drive pin secured thereto, and the second link is pivotally connected to a toggle lever. A cam is secured to a rotatable drive shaft, and the cam engages a cam roller which is secured to a follower plate. The follower plate, which rotates about an axis different from the drive shaft axis, has a drive pawl attached thereto, with the drive pawl being disposed adjacent the drive pin. Spring means are pivotally connected to the follower plate and are capable of being in spring charged and discharged positions. The spring is charged by rotation of the drive shaft and cam causing the cam roller to move outwardly. The outward movement of the cam roller causes rotation of the follower plate, resulting in charging of the spring means. The degree of rotation of the cam during the charging rotation is more than twice the degree of rotation of the follower plate, thereby gaining a mechanical advantage. When the spring means discharges, it causes rotation of the follower plate such that the drive pawl is capable of engaging the drive pin to move the toggle means into toggle position. Upon moving into toggle position, the toggle means moves the contact holder and movable contact into closed position. Also included are releasable toggle and drive latch means for holding the toggle means in toggle position and the follower plate in the spring charged position, respectively.

REFERENCES:
patent: 2431440 (1947-11-01), Willis
patent: 2902274 (1959-09-01), McIntyre
patent: 3095489 (1963-06-01), Baird
patent: 3139494 (1964-06-01), Caswell
patent: 3183332 (1965-05-01), Frink et al.
patent: 3214556 (1965-10-01), Zimsky
patent: 3371746 (1968-03-01), Engel
patent: 3635096 (1972-01-01), Caufield
patent: 3684848 (1972-08-01), Davies

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