Patent US3405340A successfully refreshed from Google Patents.
US3405340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dc motor power supply having single control unit alternatively varying armature and field voltages
Assignee: Westinghouse Electric Corp
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Filing: 1966-02-28
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Granted: 1968-10-08
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Expires: 1986-02-28
Abstract
No abstract record available.
Inventors
- 👤 Earl B Aukenman
- 👤 Stanley E Morgan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:11
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/28; H02P7/298; Y; Y10; Y10S; Y10S388/00; Y10S388/907; Y10S388/917
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
APPARATUS FOR CONTROLLING A DC MOTOR HAVING RESPECTIVE FIELD AND ARMATURE WINDINGS, SAID APPARATUS COMPRISING A CONTROLLABLE FIRST AC TO DC RECTIFIER HAVING A FIRST DC OUTPUT CIRCUIT, A SECOND AC TO DC RECTIFIER HAVING A SECOND DC OUTPUT CIRCUIT, SWITCH MEANS SELECTIVELY OPERABLE IN FIRST AND SECOND MODES, SAID SWITCH MEANS BEING CONNECTED TO SAID FIRST AND SECOND DC OUTPUT CIRCUITS AND TO SAID ARMATURE AND FIELD WINDINGS, SAID SWITCH MEANS IN THE FIRST MODE CONNECTING THE FIRST DC OUTPUT CIRCUIT TO THE ARMATURE WINDING AND THE SECOND DC OUTPUT CIRCUIT TO THE FIELD WINDING, SAID SWITCH MEANS IN THE SECOND MODE CONNECTING THE FIRST DC OUTPUT CIRCUIT TO THE FIELD WINDING AND THE SECOND DC OUTPUT CIRCUIT TO THE ARMATURE WINDING.
Claim 2
Dependent Claim
123 words
APPARATUS FOR CONTROLLING A DC MOTOR HAVING RESPECTIVE FIELD AND ARMATURE WINDINGS, SAID APPARATUS COMPRISING A CONTROLLABLE FIRST AC TO DC RECTIFIER HAVING A FIRST DC OUTPUT CIRCUIT, A SECOND AC TO DC RECTIFIER HAVING A SECOND DC OUTPUT CIRCUIT, SWITCH MEANS SELECTIVELY OPERABLE IN FIRST AND SECOND MODES, SAID SWITCH MEANS BEING CONNECTED TO SAID FIRST AND SECOND DC OUTPUT CIRCUITS AND TO SAID ARMATURE AND FIELD WINDINGS, SAID SWITCH MEANS IN THE FIRST MODE CONNECTING THE FIRST DC OUTPUT CIRCUIT TO THE ARMATURE WINDING AND THE SECOND DC OUTPUT CIRCUIT TO THE FIELD WINDING, SAID SWITCH MEANS IN THE SECOND MODE CONNECTING THE FIRST DC OUTPUT CIRCUIT TO THE FIELD WINDING AND THE SECOND DC OUTPUT CIRCUIT TO THE ARMATURE WINDING.
References Cited (Backward Citations)
US3181050A
Cited
US3205396A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-08 | 1972-04-08 | 1972-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-08 | 1976-04-08 | 1976-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-08 | 1980-04-08 | 1980-10-08 | $7700.00 | Window Closed / Lapsed |