Electricity: circuit makers and breakers – Liquid contact – Time delay
Patent
1974-11-19
1977-04-05
Scott, James R.
Electricity: circuit makers and breakers
Liquid contact
Time delay
200 82B, 200308, H01H 3300, H01H 900
Patent
active
040163849
ABSTRACT:
An improved circuit-breaker position-indicator is provided for a gas-type circuit-interrupter in which the circuit-breaker structure is enclosed within an outer pressurized casing at a different pressure than the gas pressure interiorly of the circuit-breaker itself. Improved means are provided for effecting manual movement of the circuit-breaker contacts by a hand-jack assembly, when desired. Visible safe indication of the correct circuit-breaker open and closed-circuit positions is obtained at all times for safe and dependable operation of the circuit-breaker.
REFERENCES:
patent: 3225170 (1965-12-01), Chabala et al.
patent: 3590189 (1971-06-01), Fischer et al.
patent: 3639713 (1972-02-01), Fischer et al.
patent: 3852556 (1974-12-01), Kane et al.
Crookston Ronald W.
LeRow, Jr. Charles E.
Crout W. R.
Scott James R.
Westinghouse Electric Corporation
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