US3293496A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switching device for interruption of alternating current
Assignee: BBC Brown Boveri AG Germany
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Filing: 1963-02-06
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Granted: 1966-12-20
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Expires: 1983-02-06
Abstract
No abstract record available.
Inventors
- 👤 Induni Giovanni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:05
CPC Classifications
H; H01; H01H; H01H9/00; H01H9/54; H01H9/541
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
IN A SWITCHING APPARATUS FOR INTERRUPTION OF ALTERNATING CURRENT LOADS, THE COMBINATION COMPRISING A MAIN SWITCH INSERTED IN THE CIRCUIT CARRYING THE ALTERNATING CURRENT TO BE INTERRUPTED, TWO BRANCH SWITCHING CIRCUITS CONNECTED IN PARALLEL WITH SAID MAIN SWITCH, EACH SAID BRANCH CIRCUIT INCLUDING A BRANCH INTERRUPTER AND A ONE-WAY ELECTRIC VALVE CONNECTED IN SERIES, SAID ONE-WAY ELECTRIC VALVES BEING CONNECTED ANTIPARALLEL SO AS TO HAVE OPPOSITELY DIRECTED CURRENT PASSING DIRECTIONS, SAID BRANCH INTERRUPTERS BEING CLOSED WHEN SAID MAIN SWITCH IS CLOSED AND SAID MAIN SWITCH THEN CARRYING SUBSTANTIALLY ALL OF THE LOAD CURRENT, AT LEAST ONE TRIPPING DEVICE RESPONSIVE TO CURRENT FLOW IN SAID BRANCH CIRCUITS AND AT LEAST TWO OTHER TRIPPING DEVICES RESPONSIVE TO THE RECOVERY VOLTAGE APPEARING ACROSS THE CONTACTS OF SAID MAIN SWITCH WHEN OPENED, AND CIRCUIT MEANS CONNECTING SAID TRIPPING DEVICES WITH SAID BRANCH CIRCUIT INTERRUPTERS SUCH THAT OPENING OF THE INTERRUPTER IN EACH SAID BRANCH CIRCUIT TAKES PLACE ONLY DURING THAT HALF WAVE OF THE ALTERNATING CURRENT FOR WHICH THE APPERTAINING ONE-WAY ELECTRIC VALVE IS BLOCKED.
Claim 2
Dependent Claim
171 words
IN A SWITCHING APPARATUS FOR INTERRUPTION OF ALTERNATING CURRENT LOADS, THE COMBINATION COMPRISING A MAIN SWITCH INSERTED IN THE CIRCUIT CARRYING THE ALTERNATING CURRENT TO BE INTERRUPTED, TWO BRANCH SWITCHING CIRCUITS CONNECTED IN PARALLEL WITH SAID MAIN SWITCH, EACH SAID BRANCH CIRCUIT INCLUDING A BRANCH INTERRUPTER AND A ONE-WAY ELECTRIC VALVE CONNECTED IN SERIES, SAID ONE-WAY ELECTRIC VALVES BEING CONNECTED ANTIPARALLEL SO AS TO HAVE OPPOSITELY DIRECTED CURRENT PASSING DIRECTIONS, SAID BRANCH INTERRUPTERS BEING CLOSED WHEN SAID MAIN SWITCH IS CLOSED AND SAID MAIN SWITCH THEN CARRYING SUBSTANTIALLY ALL OF THE LOAD CURRENT, AT LEAST ONE TRIPPING DEVICE RESPONSIVE TO CURRENT FLOW IN SAID BRANCH CIRCUITS AND AT LEAST TWO OTHER TRIPPING DEVICES RESPONSIVE TO THE RECOVERY VOLTAGE APPEARING ACROSS THE CONTACTS OF SAID MAIN SWITCH WHEN OPENED, AND CIRCUIT MEANS CONNECTING SAID TRIPPING DEVICES WITH SAID BRANCH CIRCUIT INTERRUPTERS SUCH THAT OPENING OF THE INTERRUPTER IN EACH SAID BRANCH CIRCUIT TAKES PLACE ONLY DURING THAT HALF WAVE OF THE ALTERNATING CURRENT FOR WHICH THE APPERTAINING ONE-WAY ELECTRIC VALVE IS BLOCKED.
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) | 1969-12-19 | 1970-06-20 | 1970-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-19 | 1974-06-20 | 1974-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-19 | 1978-06-20 | 1978-12-20 | $7700.00 | Window Closed / Lapsed |