US3238439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alternator voltage regulator
Assignee: Stone J and Co Ltd
•
Filing: 1962-05-28
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Granted: 1966-03-01
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Expires: 1982-05-28
Abstract
No abstract record available.
Inventors
- 👤 Hobbs Edwin Daniel
- 👤 Cole Peter John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:42
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/14; H02J7/16; B; B60; B60L; B60L9/00; B60L9/16; B60L9/24; B60L9/26; B60L2200/00; B60L2200/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
AN ELECTRICAL SUPPLY SYSTEM COMPRISING A VARIABLESPEED, HIGH-FREQUENCY, UNSATURATED ALTERNATOR, A LOAD CONNECTED TO SAID ALTERNATOR, SAID LOAD HAVING AN IMPEDANCE OF THE SAME ORDER AS THE INTERNAL IMPEDANCE OF SAID ALTERNATOR, SAID ALTERNATOR BEING PROVIDED WITH A FIELD WINDING, MEANS FOR SUPPLYING THE SAID WINDING WITH A SUBSTANTIALLY CONSTANT CURRENT, SAID ALTERNATOR ALSO BEING PROVIDED WITH AN AUXILIARY ADDITIVE, FIELD WINDING, A FREQUENCY-SENSITIVE CIRCUIT HAVING A LOW IMPEDANCE AT LOW ALTERNATOR SPEED, WHEN THE FREQUENCY IS LOW, AND
Claim 2
Dependent Claim
79 words
AN ELECTRICAL SUPPLY SYSTEM COMPRISING A VARIABLESPEED, HIGH-FREQUENCY, UNSATURATED ALTERNATOR, A LOAD CONNECTED TO SAID ALTERNATOR, SAID LOAD HAVING AN IMPEDANCE OF THE SAME ORDER AS THE INTERNAL IMPEDANCE OF SAID ALTERNATOR, SAID ALTERNATOR BEING PROVIDED WITH A FIELD WINDING, MEANS FOR SUPPLYING THE SAID WINDING WITH A SUBSTANTIALLY CONSTANT CURRENT, SAID ALTERNATOR ALSO BEING PROVIDED WITH AN AUXILIARY ADDITIVE, FIELD WINDING, A FREQUENCY-SENSITIVE CIRCUIT HAVING A LOW IMPEDANCE AT LOW ALTERNATOR SPEED, WHEN THE FREQUENCY IS LOW, AND
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) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |