Electricity: circuit makers and breakers – Liquid contact – Time delay
Patent
1976-07-08
1979-05-08
Tudor, Harold J.
Electricity: circuit makers and breakers
Liquid contact
Time delay
185 40B, 200153V, H01H 330
Patent
active
041538285
ABSTRACT:
This operating means comprises a circuit-breaker closing spring, a rotatable spring-controller mounted for rotation between first and second dead-center positions with respect to said spring, and means for transmitting charging forces to the spring in response to rotation of the spring-controller in a forward direction from said second toward said first dead-center position. The spring acts to discharge and thereby further rotate said spring-controller in a forward direction when the spring-controller has been rotated in a forward direction past said first dead-center position. Discharge of the spring drives the spring-controller into said second dead-center position, following which the spring-controller oscillates about said second dead-center position to dissipate excess energy then remaining in the parts.
Means is provided for closing the circuit breaker in response to said forward rotation of the spring-controller into said second dead-center position, and this means comprises: a mechanically trip-free operating mechanism coupled to the movable contact of the circuit breaker and a linkage interconnecting said spring-controller and said operating mechanism through a pin and slot coupling. The pin and slot coupling (i) transmits closing force between the spring controller and the operating mechanism during spring-discharge, (ii) allows the spring-controller to oscillate about said second dead-center position without actuating the operating mechanism, and (iii) allows the spring-controller to be moved from said second to said first dead-center position during spring-charging without actuating said operating mechanism.
REFERENCES:
patent: 2909629 (1959-10-01), McCloud
patent: 3590192 (1971-06-01), Bould et al.
patent: 3689721 (1972-09-01), McGuffie
patent: 3729065 (1973-04-01), Baskeville et al.
patent: 3794798 (1974-02-01), Trayer
patent: 3801765 (1974-04-01), Hodgson
patent: 3876847 (1975-04-01), Dykes et al.
patent: 3894204 (1975-07-01), May
patent: 3905247 (1975-09-01), Cook
Freedman William
General Electric Company
Tudor Harold J.
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