Electricity: circuit makers and breakers – Liquid contact – Time delay
Patent
1982-03-12
1984-03-27
Marcus, Stephen
Electricity: circuit makers and breakers
Liquid contact
Time delay
200153G, 200308, H01H 306
Patent
active
044396538
ABSTRACT:
A circuit breaker operating apparatus is provided which includes a frame, a rotatable closing shaft attached to the frame, a first member disposed on one end of the closing shaft for rotating the closing shaft only in one direction, a second member disposed on the other end of the closing shaft for rotating the closing shaft only in the same direction as the first member rotates, and alternately with the first member and a closing cam fixedly secured to the closing shaft which rotates pivotally about the closing shaft in the same direction as the closing shaft rotates. The circuit breaker operating apparatus also includes a spring member provided with one end fixedly secured to the frame, the other end, to the closing cam respectively. The closing cam rotates for charging closing energy into the spring member, and rotates also for discharging the closing energy charged within the spring member after having rotated in a specified constant angle. The circuit breaker operating apparatus further includes a linkage provided with one end sliding on the closing cam, a coupling shaft disposed on the frame and coupled to the other end of the linkage, which rotates depending upon the linkage movement effected by rotation of the closing cam, thereby moving movable contacts into open or closed position, and a tripping member which operates in response to a command signal based on occurrence of overcurrent of abnormalities, thereby driving the linkage.
REFERENCES:
patent: 3234803 (1966-02-01), Caswell et al.
patent: 3835275 (1974-09-01), Preuss
patent: 4146765 (1979-03-01), Wilson
patent: 4152561 (1979-05-01), Maier et al.
patent: 4166205 (1979-08-01), Maier et al.
patent: 4264796 (1981-04-01), Nelson et al.
patent: 4301342 (1981-11-01), Castonguay et al.
Takano Ikuo
Umino Hiroshi
Cusick Ernest G.
Marcus Stephen
Tokyo Shibaura Denki Kabushiki Kaisha
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