Patent US3303349A successfully refreshed from Google Patents.
US3303349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuits employing alternators
Assignee: Lucas Support Services Ltd
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Filing: 1963-03-20
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Granted: 1967-02-07
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Expires: 1983-03-20
Abstract
No abstract record available.
Inventors
- 👤 Sinclair Walter
- 👤 Hempstead Hemel
- 👤 Philipp Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:09
CPC Classifications
H; H02; H02J; H02J3/00; H02J3/38; H02J3/46; H02J3/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
AN ALTERNATING CURRENT SYSTEM COMPRISING IN COMBINATION A FIRST ALTERNATOR HAVING A FIELD COIL, A FIRST ALTERNATING CURRENT LOAD CONNECTED TO SAID ALTERNATOR, VOLTAGE REGULATOR CONNECTED TO SAID ALTERNATOR, SAID VOLTAGE REGULATOR BEING SENSITIVE TO THE OUTPUT VOLTAGE OF SAID ALTERNATOR AND VARYING THE CURRENT FLOWING IN THE FIELD COIL OF SAID ALTERNATOR IN A MANNER TO MAINTAIN THE OUTPUT VOLTAGE OF SAID ALTERNATOR SUBSTANTIALLY CONSTANT, A SECOND ALTERNATOR HAVING A FIELD COIL, A SECOND ALTERNATING CURRENT LOAD CONNECTED TO SAID SECOND ALTERNATOR, A SECOND VOLTAGE REGULATOR CONNECTED TO SAID SECOND ALTERNATOR, SAID SECOND VOLTAGE REGULATOR BEING SENSITIVE TO THE OUTPUT VOLTAGE OF SAID SECOND ALTERNATOR AND VARYING THE CURRENT FLOW TO THE FIELD COIL OF SAID SECOND ALTERNATOR SO AS TO MAINTAIN THE OUTPUT VOLTAGE OF SAID SECOND ALTERNATOR SUBSTANTIALLY CONSTANT, FIRST AND SECOND TRANSFORMER-
Claim 2
Dependent Claim
136 words
AN ALTERNATING CURRENT SYSTEM COMPRISING IN COMBINATION A FIRST ALTERNATOR HAVING A FIELD COIL, A FIRST ALTERNATING CURRENT LOAD CONNECTED TO SAID ALTERNATOR, VOLTAGE REGULATOR CONNECTED TO SAID ALTERNATOR, SAID VOLTAGE REGULATOR BEING SENSITIVE TO THE OUTPUT VOLTAGE OF SAID ALTERNATOR AND VARYING THE CURRENT FLOWING IN THE FIELD COIL OF SAID ALTERNATOR IN A MANNER TO MAINTAIN THE OUTPUT VOLTAGE OF SAID ALTERNATOR SUBSTANTIALLY CONSTANT, A SECOND ALTERNATOR HAVING A FIELD COIL, A SECOND ALTERNATING CURRENT LOAD CONNECTED TO SAID SECOND ALTERNATOR, A SECOND VOLTAGE REGULATOR CONNECTED TO SAID SECOND ALTERNATOR, SAID SECOND VOLTAGE REGULATOR BEING SENSITIVE TO THE OUTPUT VOLTAGE OF SAID SECOND ALTERNATOR AND VARYING THE CURRENT FLOW TO THE FIELD COIL OF SAID SECOND ALTERNATOR SO AS TO MAINTAIN THE OUTPUT VOLTAGE OF SAID SECOND ALTERNATOR SUBSTANTIALLY CONSTANT, FIRST AND SECOND TRANSFORMER-
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) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |