US3084324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alternator drive
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1960-08-02
•
Granted: 1963-04-02
•
Expires: 1980-08-02
Abstract
No abstract record available.
Inventors
- 👤 Achilles C Sampietro
- 👤 Grigsby John De Rolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:19
CPC Classifications
H; H02; H02P; H02P9/00; H02P9/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
187 words
A SYSTEM FOR PRODUCING ALTERNATING CURRENT AT A CONSTANT FREQUENCY COMPRISING A PLURALITY OF UNITS, EACH OF SAID UNITS HAVING A ROTATABLY MOUNTED MEMBER THAT IS ADAPTED TO BE COUPLED TO A DRIVE MOTOR, A FIRST WINDING INDUCTIVELY COUPLED WITH SAID MEMBER, A VARIABLE FREQUENCY ALTERNATING CURRENT SOURCE COUPLED TO SAID FIRST WINDING, A SECOND WINDING MOUNTED ADJACENT TO SAID MEMBER SUCH THAT A VOLTAGE IS INDUCED IN SAID SECOND WINDING WHEN CURRENT FLOWS THROUGH SAID FIRST WINDING AND SAID MEMBER IS ROTATED BY ITS ASSOCIATED DRIVE MOTOR, MEANS RESPONSIVE TO THE RATE OF ROTATION OF SAID MEMBER AND COUPLED TO SAID ALTERNATING CURRENT SOURCE FOR VARYING THE FREQUENCY OF SAID ALTERNATING CURRENT SOURCE IN ACCORDANCE WITH VARIATIONS IN THE RATE OF ROTATION OF SAID MEMBER, A PLURALITY OF SWITCH MEANS COUPLING SAID SECOND WINDING OF EACH OF SAID UNITS TO A BUS SYSTEM, EACH OF SAID SWITCH MEANS BEING ADAPTED TO OPEN IN THE EVENT THE FREQUENCY OF THE VOLTAGE INDUCED IN ITS ASSOCIATED SECOND WINDING FALLS BELOW THE FREQUENCY OF THE VOLTAGES INDUCED IN SAID SECOND WINDINGS OF THE OTHER OF SAID PLURALITY OF UNITS.
Claim 2
Independent Claim
187 words
A SYSTEM FOR PRODUCING ALTERNATING CURRENT AT A CONSTANT FREQUENCY COMPRISING A PLURALITY OF UNITS, EACH OF SAID UNITS HAVING A ROTATABLY MOUNTED MEMBER THAT IS ADAPTED TO BE COUPLED TO A DRIVE MOTOR, A FIRST WINDING INDUCTIVELY COUPLED WITH SAID MEMBER, A VARIABLE FREQUENCY ALTERNATING CURRENT SOURCE COUPLED TO SAID FIRST WINDING, A SECOND WINDING MOUNTED ADJACENT TO SAID MEMBER SUCH THAT A VOLTAGE IS INDUCED IN SAID SECOND WINDING WHEN CURRENT FLOWS THROUGH SAID FIRST WINDING AND SAID MEMBER IS ROTATED BY ITS ASSOCIATED DRIVE MOTOR, MEANS RESPONSIVE TO THE RATE OF ROTATION OF SAID MEMBER AND COUPLED TO SAID ALTERNATING CURRENT SOURCE FOR VARYING THE FREQUENCY OF SAID ALTERNATING CURRENT SOURCE IN ACCORDANCE WITH VARIATIONS IN THE RATE OF ROTATION OF SAID MEMBER, A PLURALITY OF SWITCH MEANS COUPLING SAID SECOND WINDING OF EACH OF SAID UNITS TO A BUS SYSTEM, EACH OF SAID SWITCH MEANS BEING ADAPTED TO OPEN IN THE EVENT THE FREQUENCY OF THE VOLTAGE INDUCED IN ITS ASSOCIATED SECOND WINDING FALLS BELOW THE FREQUENCY OF THE VOLTAGES INDUCED IN SAID SECOND WINDINGS OF THE OTHER OF SAID PLURALITY OF UNITS.
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) | 1966-04-01 | 1966-10-01 | 1967-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-01 | 1970-10-01 | 1971-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-01 | 1974-10-01 | 1975-04-02 | $7700.00 | Window Closed / Lapsed |