US3237089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for improving constant voltage transformers
Assignee: LAMBDA ELECTRONICS CORP
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Filing: 1961-06-21
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Granted: 1966-02-22
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Expires: 1981-06-21
Abstract
No abstract record available.
Inventors
- 👤 Dubin Lester
- 👤 Manor Pelham
- 👤 Hastings Raymond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:35
CPC Classifications
G; G05; G05F; G05F3/00; G05F3/02; G05F3/04; G05F3/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
IN A CONSTANT VOLTAGE TRANSFORMER CIRCUIT, THE COMBINATION OF A SATURABLE TRANSFORMER CORE; A PRIMARY WINDING OPERATIVELY ASSOCIATED WITH SAID CORE AND HAVING END TERMINALS AND A TAP TERMINAL THEREBETWEEN; AND INDUCTANCE CIRCUIT MEANS CONNECTED TO ONE OF SAID END TERMINALS AND SAID TAP TERMINAL FOR SERIALLY COUPLING A PORTION OF SAID PRIMARY WINDING TO AN A.C.COURCE VIA SAID INDUCTANCE A CAPACITOR CONNECTED BETWEEN SAID END TERMINALS HAVING A CAPACITOR VALUE LESS THAN THAT NORMALLY REQUIRED TO CHIEVE SATISFACTORY CONSTANT VOLTAGE OPERATION; A RESISTOR CONNECTED IN SERIES WITH SAID CAPACITANCE BETWEEN SAID END TERMINALS HAVING A VALUE SUFFICIENT TO ELIMINATE NO-LOAD INSTABILITY; AND AT LEAST ONE OUTPUT WINDING OPERATIVELY COUPLED TO SAID CORE.
Claim 2
Dependent Claim
113 words
IN A CONSTANT VOLTAGE TRANSFORMER CIRCUIT, THE COMBINATION OF A SATURABLE TRANSFORMER CORE; A PRIMARY WINDING OPERATIVELY ASSOCIATED WITH SAID CORE AND HAVING END TERMINALS AND A TAP TERMINAL THEREBETWEEN; AND INDUCTANCE CIRCUIT MEANS CONNECTED TO ONE OF SAID END TERMINALS AND SAID TAP TERMINAL FOR SERIALLY COUPLING A PORTION OF SAID PRIMARY WINDING TO AN A.C.COURCE VIA SAID INDUCTANCE A CAPACITOR CONNECTED BETWEEN SAID END TERMINALS HAVING A CAPACITOR VALUE LESS THAN THAT NORMALLY REQUIRED TO CHIEVE SATISFACTORY CONSTANT VOLTAGE OPERATION; A RESISTOR CONNECTED IN SERIES WITH SAID CAPACITANCE BETWEEN SAID END TERMINALS HAVING A VALUE SUFFICIENT TO ELIMINATE NO-LOAD INSTABILITY; AND AT LEAST ONE OUTPUT WINDING OPERATIVELY COUPLED TO SAID CORE.
References Cited (Backward Citations)
US1985634A
Cited
US2143745A
Cited
US2530011A
Cited
GB583497A
Cited
US2432343A
Cited
US2505620A
Cited
FR1125127A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |