US3075137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machines with slip-drives, particularly as applied to a.-c. generators
Assignee: Precision Mecanique Labinal SA
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Filing: 1960-01-20
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Granted: 1963-01-22
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Expires: 1980-01-20
Abstract
No abstract record available.
Inventors
- 👤 Bessiere Pierre Etienne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:10
CPC Classifications
H; H02; H02K; H02K51/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
IN A FIXED FREQUENCY ALTERNATING CURRENTS GENERATING MACHINE DRIVEN BY A SHAFT THE ROTATIONAL SPEED OF WHICH IS VARIABLE AND COMPRISING, BETWEEN AN ALTERNATOR AND SAID SHAFT, AN INTERPOSED SLIP COUPLING THE SLIP-ACTION OF WHICH IS MONITORED BY SAID FIXED FREQUENCY ALTERNATING CURRENTS, IN COMBINATION, AT LEAST A COILED FIELD-MAGNET MECHANICALLY DRIVEN IN ROTATION BY SAID SHAFT, MEANS FOR ENERGIZING SAID COILED FIELD-MAGNET, AT LEAST A CORRESPONDING COILED ARMATURE, MEANS FOR COLLECTING ELECTRIC CUR-
Claim 2
Dependent Claim
74 words
IN A FIXED FREQUENCY ALTERNATING CURRENTS GENERATING MACHINE DRIVEN BY A SHAFT THE ROTATIONAL SPEED OF WHICH IS VARIABLE AND COMPRISING, BETWEEN AN ALTERNATOR AND SAID SHAFT, AN INTERPOSED SLIP COUPLING THE SLIP-ACTION OF WHICH IS MONITORED BY SAID FIXED FREQUENCY ALTERNATING CURRENTS, IN COMBINATION, AT LEAST A COILED FIELD-MAGNET MECHANICALLY DRIVEN IN ROTATION BY SAID SHAFT, MEANS FOR ENERGIZING SAID COILED FIELD-MAGNET, AT LEAST A CORRESPONDING COILED ARMATURE, MEANS FOR COLLECTING ELECTRIC CUR-
References Cited (Backward Citations)
US2682618A
Cited
US2883611A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-21 | 1966-07-23 | 1967-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-21 | 1970-07-23 | 1971-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-21 | 1974-07-23 | 1975-01-22 | $7700.00 | Window Closed / Lapsed |