Patent US3294193A successfully refreshed from Google Patents.
Patent US3353067A successfully refreshed from Google Patents.
US3353067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ac circuit breaker
Assignee: Dickson Electronics Corp
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Filing: 1964-10-12
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Granted: 1967-11-14
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Expires: 1984-10-12
Abstract
No abstract record available.
Inventors
- 👤 Richard L White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:35
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/72; H03K17/722; H03K17/723
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
214 words
AN AC CIRCUIT BREAKER COMPRISING: (A) A FIRST AND A SECOND TERMINAL, (B) A FIRST AND A SECOND CONTROLLED RECTIFIER EACH HAVING AN ANODE ELECTRODE, A CATHODE ELECTRODE, AND A CONTROL ELECTRODE, (C) MEANS CONNECTING THE ANODE AND CATHODE ELECTRODES OF SAID FIRST CONTROLLED RECTIFIER TO SAID FIRST AND SECOND TERMINALS RESPECTIVELY, (D) MEANS CONNECTING THE CATHODE AND ANODE ELECTRODES OF SAID SECOND CONTROLLED RECTIFIER TO SAID FIRST AND SECOND TERMINALS RESPECTIVELY, (E) A TRANSFORMER HAVING A PRIMARY AND A SECONDARY WINDING, (F) MEANS CONNECTING ONE SIDE OF SAID PRIMARY WINDING TO THE CONTROL ELECTRODE OF SAID FIRST CONTROLLED RECTIFIER AND THE OTHER SIDE OF SAID PRIMARY WINDING TO SAID SECOND TERMINAL, (G) MEANS CONNECTING ONE SIDE OF SAID SECONDARY WINDING TO THE CONTROL ELECTRODE OF SAID SECOND CONTROLLED RECTIFIER AND THE OTHER SIDE OF SAID SECONDARY WINDING TO SAID FIRST TERMINAL, (H) SAID PRIMARY AND SECONDARY WINDINGS INDUCTIVELY RELATED TO PROVIDE VOLTAGES AT THE RESPECTIVE SIDES OF SAID WINDINGS CONNECTED TO SAID CONTROL ELECTRODES FOR GATING THE CORRESPONDING CONTROLLED RECTIFIER, NI) A CONTROL WINDING ON SAID TRANSFORMER, (J) VARIABLE IMPEDANCE MEANS CONNECTED IN SERIES WITH SAID CONTROL WINDING, AND (K) TRANSIENT PRODUCING MEANS CONNECTED TO SAID CONTROL ELECTRODES FOR INITIATING CONDUCTION THROUGH ONE OF SAID CONTROLLED RECTIFIERS WHEN SAID VARIABLE IMPEDANCE IS LOW.
Claim 2
Dependent Claim
214 words
AN AC CIRCUIT BREAKER COMPRISING: (A) A FIRST AND A SECOND TERMINAL, (B) A FIRST AND A SECOND CONTROLLED RECTIFIER EACH HAVING AN ANODE ELECTRODE, A CATHODE ELECTRODE, AND A CONTROL ELECTRODE, (C) MEANS CONNECTING THE ANODE AND CATHODE ELECTRODES OF SAID FIRST CONTROLLED RECTIFIER TO SAID FIRST AND SECOND TERMINALS RESPECTIVELY, (D) MEANS CONNECTING THE CATHODE AND ANODE ELECTRODES OF SAID SECOND CONTROLLED RECTIFIER TO SAID FIRST AND SECOND TERMINALS RESPECTIVELY, (E) A TRANSFORMER HAVING A PRIMARY AND A SECONDARY WINDING, (F) MEANS CONNECTING ONE SIDE OF SAID PRIMARY WINDING TO THE CONTROL ELECTRODE OF SAID FIRST CONTROLLED RECTIFIER AND THE OTHER SIDE OF SAID PRIMARY WINDING TO SAID SECOND TERMINAL, (G) MEANS CONNECTING ONE SIDE OF SAID SECONDARY WINDING TO THE CONTROL ELECTRODE OF SAID SECOND CONTROLLED RECTIFIER AND THE OTHER SIDE OF SAID SECONDARY WINDING TO SAID FIRST TERMINAL, (H) SAID PRIMARY AND SECONDARY WINDINGS INDUCTIVELY RELATED TO PROVIDE VOLTAGES AT THE RESPECTIVE SIDES OF SAID WINDINGS CONNECTED TO SAID CONTROL ELECTRODES FOR GATING THE CORRESPONDING CONTROLLED RECTIFIER, NI) A CONTROL WINDING ON SAID TRANSFORMER, (J) VARIABLE IMPEDANCE MEANS CONNECTED IN SERIES WITH SAID CONTROL WINDING, AND (K) TRANSIENT PRODUCING MEANS CONNECTED TO SAID CONTROL ELECTRODES FOR INITIATING CONDUCTION THROUGH ONE OF SAID CONTROLLED RECTIFIERS WHEN SAID VARIABLE IMPEDANCE IS LOW.
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) | 1970-11-13 | 1971-05-15 | 1971-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-13 | 1975-05-15 | 1975-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-13 | 1979-05-15 | 1979-11-14 | $7700.00 | Window Closed / Lapsed |