US3168691A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistorized servo amplifier
Assignee: Regulator AG
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Filing: 1962-11-23
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Granted: 1965-02-02
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Expires: 1982-11-23
Abstract
No abstract record available.
Inventors
- 👤 Olofsson Erik Herbert
- 👤 Jansson Lars Eric
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:44
CPC Classifications
H; H02; H02P; H02P23/00; H02P23/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
181 words
TRANSISTORIZED SERVO AMPLIFIER COMPRISING: AN INPUT TRANSFORMER, TWO SECONDARY WINDINGS ON SAID TRANSFORMER, A FIRST TRANSISTOR AND A SECOND TRANSISTOR, A LEAD CONNECTING THE COLLECTOR OF SAID FIRST TRANSISTOR TO THE EMITTER OF SAID SECOND TRANSISTOR, SAID WINDINGS BEING CONNECTED EACH TO THE BASE AND THE EMITTER OF A SEPARATE ONE OF SAID TRANSISTORS IN SUCH A MANNER AS TO FEED THEM IN OPPOSITION, A BRIDGE CIRCUIT HAVING FOUR BRANCHES A RECTIFIER INSERTED IN EACH OF SAID BRANCHES, THE TERMINALS OF A FIRST DIAGONAL OF SAID BRIDGE BEING CONNECTED TO THE EMITTER OF THE FIRST TRANSISTOR AND TO THE COLLECTOR TO THE SECOND TRANSISTOR, RESPECTIVELY, THE RECTIFIERS HAVING THEIR DIRECTIONS OF CONDUCTIVITY COINCIDING WITH THE DIRECTIONS OF CONDUCTIVITY OF THE TRANSISTORS, A CURRENT SUPPLY TRANSFORMER, TWO SECONDARY WINDINGS ON SAID TRANSFORMER, A LOAD COMPRISING TWO WINDINGS, SAID LOAD WINDINGS BEING AT THEIR ONE ENDS CONNECTED TOGETHER AND TO SAID LEAD CONNECTING THE TRANSISTORS, SAID LOAD WINDINGS BEING EACH IN SERIES WITH A SEPARATE ONE OF SAID LAST-MENTONED SECONDARY WINDING CONNECTED TO OPPOSITE TERMINALS OF A SECOND DIAGONAL OF SAID RECTIFIER BRIDGE.
Claim 2
Dependent Claim
181 words
TRANSISTORIZED SERVO AMPLIFIER COMPRISING: AN INPUT TRANSFORMER, TWO SECONDARY WINDINGS ON SAID TRANSFORMER, A FIRST TRANSISTOR AND A SECOND TRANSISTOR, A LEAD CONNECTING THE COLLECTOR OF SAID FIRST TRANSISTOR TO THE EMITTER OF SAID SECOND TRANSISTOR, SAID WINDINGS BEING CONNECTED EACH TO THE BASE AND THE EMITTER OF A SEPARATE ONE OF SAID TRANSISTORS IN SUCH A MANNER AS TO FEED THEM IN OPPOSITION, A BRIDGE CIRCUIT HAVING FOUR BRANCHES A RECTIFIER INSERTED IN EACH OF SAID BRANCHES, THE TERMINALS OF A FIRST DIAGONAL OF SAID BRIDGE BEING CONNECTED TO THE EMITTER OF THE FIRST TRANSISTOR AND TO THE COLLECTOR TO THE SECOND TRANSISTOR, RESPECTIVELY, THE RECTIFIERS HAVING THEIR DIRECTIONS OF CONDUCTIVITY COINCIDING WITH THE DIRECTIONS OF CONDUCTIVITY OF THE TRANSISTORS, A CURRENT SUPPLY TRANSFORMER, TWO SECONDARY WINDINGS ON SAID TRANSFORMER, A LOAD COMPRISING TWO WINDINGS, SAID LOAD WINDINGS BEING AT THEIR ONE ENDS CONNECTED TOGETHER AND TO SAID LEAD CONNECTING THE TRANSISTORS, SAID LOAD WINDINGS BEING EACH IN SERIES WITH A SEPARATE ONE OF SAID LAST-MENTONED SECONDARY WINDING CONNECTED TO OPPOSITE TERMINALS OF A SECOND DIAGONAL OF SAID RECTIFIER BRIDGE.
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) | 1968-02-02 | 1968-08-03 | 1969-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-02 | 1972-08-03 | 1973-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-02 | 1976-08-03 | 1977-02-02 | $7700.00 | Window Closed / Lapsed |