Patent US3152298A successfully refreshed from Google Patents.
US3152298A
Expired / Lapsed
US
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Generator field winding regulation with direct thermistor control of the field winding control circuit
Assignee: Motorola Solutions Inc
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Filing: 1961-10-17
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Granted: 1964-10-06
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Expires: 1981-10-17
Abstract
No abstract record available.
Inventors
- 👤 Theodore A Byles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:18
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/14; H02J7/16; H02J7/60; H02J7/65
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
IN A VEHICULAR ELECTRICAL SYSTEM INCORPORATING A BATTERY CHARGING CIRCUIT INCLUDING VOLTAGE PRODUCING MEANS HAVING A FIELD WINDING THEREIN, A TRANSISTOR TYPE REGULATOR HAVING AN OUTPUT TRANSISTOR AND MEANS FOR CONNECTING THE SAME BETWEEN THE OUTPUT OF THE VOLTAGE PRODUCING MEANS TO CONTROL THE CURRENT THEREIN, A THERMISTOR HAVING A NEGATIVE TEMPERATURE COEFFICIENT AND ADAPTED TO BE LOCATED IN THERMAL PROXIMITY TO A HEAT VULNERABLE ELEMENT OF THE SYSTEM, MEANS CONNECTING SAID THERMISTOR TO SAID OUTPUT TRANSISTOR TO DECREASE THE FORWARD BIAS THEREON AS THE RESISTANCE OF SAID THERMISTOR DECRESES THEREBY REDUCING THE CURRENT IN SAID FIELD WINDING OF SAID VOLTAGE PRODUCING MEANS.
Claim 2
Dependent Claim
103 words
IN A VEHICULAR ELECTRICAL SYSTEM INCORPORATING A BATTERY CHARGING CIRCUIT INCLUDING VOLTAGE PRODUCING MEANS HAVING A FIELD WINDING THEREIN, A TRANSISTOR TYPE REGULATOR HAVING AN OUTPUT TRANSISTOR AND MEANS FOR CONNECTING THE SAME BETWEEN THE OUTPUT OF THE VOLTAGE PRODUCING MEANS TO CONTROL THE CURRENT THEREIN, A THERMISTOR HAVING A NEGATIVE TEMPERATURE COEFFICIENT AND ADAPTED TO BE LOCATED IN THERMAL PROXIMITY TO A HEAT VULNERABLE ELEMENT OF THE SYSTEM, MEANS CONNECTING SAID THERMISTOR TO SAID OUTPUT TRANSISTOR TO DECREASE THE FORWARD BIAS THEREON AS THE RESISTANCE OF SAID THERMISTOR DECRESES THEREBY REDUCING THE CURRENT IN SAID FIELD WINDING OF SAID VOLTAGE PRODUCING MEANS.
References Cited (Backward Citations)
DE383917C
Cited
US2892143A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-06 | 1968-04-06 | 1968-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-06 | 1972-04-06 | 1972-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-06 | 1976-04-06 | 1976-10-06 | $7700.00 | Window Closed / Lapsed |