US3345486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blast-valve operation for gas-blast circuit breakers having two currentresponsive means
Assignee: Westinghouse Electric Corp
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Filing: 1964-10-29
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Granted: 1967-10-03
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Expires: 1984-10-29
Abstract
No abstract record available.
Inventors
- 👤 Jr Robert G Colclaser
- 👤 Charles F Cromer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:01
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/02; H01H33/53; H01H33/56; H01H33/70; H01H33/7007
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
IN A COMPRESSED GAS-TYPE OF CIRCUIT BREAKER, IN COMBINATION, FIRST ELECTROMAGNETIC MEANS RESPONSIVE TO THE MAGNITUDE OF THE CURRENT FLOW THROUGH THE BREAKER, MEANS DEFINING A HIGH-PRESSURE STORAGE RESERVIOR CONTAINING AN INTERRUPTING GAS UNDER PRESSURE, A CIRCUIT-INTERRUPTER UNIT, A BLAST VALVE FOR ADMITTING GAS UNDER PRESSURE FROM THE RESERVOIR INTO THE INTERRUPTER UNIT FOR EXTINGUISHING PURPOSES, MECHANICAL MEANS RESPONSIVE TO SAID FIRST ELECTROMAGNETIC MEANS FOR OPENING THE VALVE AT LOW CURRENTS, AND SECOND ELECTROMAGNETIC MEANS RESPONSIVE TO THE CURRENT FLOWING THROUGH THE CIRCUIT BREAKER FOR OPENING THE VALVE ONLY AT HIGH CURRENTS WHEREBY AN INCREASED TIME OF VALVE OPENING IS OBTAINED DURING HEAVY FAULT CURRENT INTERRUPTION.
Claim 2
Dependent Claim
106 words
IN A COMPRESSED GAS-TYPE OF CIRCUIT BREAKER, IN COMBINATION, FIRST ELECTROMAGNETIC MEANS RESPONSIVE TO THE MAGNITUDE OF THE CURRENT FLOW THROUGH THE BREAKER, MEANS DEFINING A HIGH-PRESSURE STORAGE RESERVIOR CONTAINING AN INTERRUPTING GAS UNDER PRESSURE, A CIRCUIT-INTERRUPTER UNIT, A BLAST VALVE FOR ADMITTING GAS UNDER PRESSURE FROM THE RESERVOIR INTO THE INTERRUPTER UNIT FOR EXTINGUISHING PURPOSES, MECHANICAL MEANS RESPONSIVE TO SAID FIRST ELECTROMAGNETIC MEANS FOR OPENING THE VALVE AT LOW CURRENTS, AND SECOND ELECTROMAGNETIC MEANS RESPONSIVE TO THE CURRENT FLOWING THROUGH THE CIRCUIT BREAKER FOR OPENING THE VALVE ONLY AT HIGH CURRENTS WHEREBY AN INCREASED TIME OF VALVE OPENING IS OBTAINED DURING HEAVY FAULT CURRENT INTERRUPTION.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-02 | 1971-04-03 | 1971-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-02 | 1975-04-03 | 1975-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-02 | 1979-04-03 | 1979-10-03 | $7700.00 | Window Closed / Lapsed |