US3401325A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speed regulating system providing slowdown control for a motor having a unidirectional converter armature supply
Assignee: Westinghouse Electric Corp
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Filing: 1966-04-25
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Granted: 1968-09-10
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Expires: 1986-04-25
Abstract
No abstract record available.
Inventors
- 👤 Loren F Stringer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:13
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/28; H02P7/298; H02P7/2985; H02P7/281; H02P7/2815; H02P7/285; H02P7/292; H02P7/293
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A CONTROL SYSTEM FOR A DIRECT CURRENT MOTOR COMPRISING A UNIDIRECTIONAL CONVERTER FOR SUPPLYING THE MOTOR ARMATURE CURRENT, AN ARMATURE CONTROL RESPONSIVE TO A SPEED ERROR SIGNAL TO CONTROL SAID UNIDIRECTIONAL CONVERTER AND PROVIDE SPEED REGULATION BY ARMATURE VOLTAGE AND CURRENT CONTROL, A FIELD CONTROL NORMALLY ESTABLISHING FORWARD FIELD EXCITATION, AND MEANS FOR APPLYING REVERSE FIELD EXCITATION AND FOR OPERATING SAID ARMATURE CONTROL TO PRODUCE BRAKING ARMATURE CURRENT FLOW DURING AT LEAST A PART OF ANY TIME PERIOD WHEN THE ACTUAL MOTOR SPEED EXCEEDS THE SET POINT SPEED.
Claim 2
Dependent Claim
88 words
A CONTROL SYSTEM FOR A DIRECT CURRENT MOTOR COMPRISING A UNIDIRECTIONAL CONVERTER FOR SUPPLYING THE MOTOR ARMATURE CURRENT, AN ARMATURE CONTROL RESPONSIVE TO A SPEED ERROR SIGNAL TO CONTROL SAID UNIDIRECTIONAL CONVERTER AND PROVIDE SPEED REGULATION BY ARMATURE VOLTAGE AND CURRENT CONTROL, A FIELD CONTROL NORMALLY ESTABLISHING FORWARD FIELD EXCITATION, AND MEANS FOR APPLYING REVERSE FIELD EXCITATION AND FOR OPERATING SAID ARMATURE CONTROL TO PRODUCE BRAKING ARMATURE CURRENT FLOW DURING AT LEAST A PART OF ANY TIME PERIOD WHEN THE ACTUAL MOTOR SPEED EXCEEDS THE SET POINT SPEED.
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) | 1971-09-10 | 1972-03-11 | 1972-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-10 | 1976-03-11 | 1976-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-10 | 1980-03-11 | 1980-09-10 | $7700.00 | Window Closed / Lapsed |