US3148318A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Generator-fed extended range motor control
Assignee: Louis Allis Co
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Filing: 1960-04-11
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Granted: 1964-09-08
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Expires: 1980-04-11
Abstract
No abstract record available.
Inventors
- 👤 Jr William J Bradburn
- 👤 Alan W Wilkerson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:50
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
IN A D.C. MOTOR CONTROL SYSTEM OF THE TYPE IN WHICH BOTH THE MOTOR ARMATURE VOLTAGE AND MOTOR FIELD WINDING EXCITATION ARE VARIABLE TO EFFECT SPEED CONTROL, THE COMBINATION COMPRISING AN ARMATURE VOLTAGE SUPPLY SOURCE CONNECTED TO SAID ARMATURE, A FIELD WINDING VOLTAGE SUPPLY SOURCE CONNECTED TO SAID FIELD WINDING, A SETTABLE SPEED SELECTING MEANS CONNECTED ACROSS SAID FIELD WINDING FOR OBTAINING A SELECTED PORTION OF THE FIELD VOLTAGE CORRESPONDING TO THE SETTING OF SAID SELECTING MEANS, FIRST CONTROL MEANS RESPONSIVE TO SAID SELECTED PORTION FOR CONTROLLING THE VOLTAGE APPLIED TO SAID ARMATURE BY SAID ARMATURE VOLTAGE SUPPLY SOURCE, SECOND CONTROL MEANS
Claim 2
Dependent Claim
102 words
IN A D.C. MOTOR CONTROL SYSTEM OF THE TYPE IN WHICH BOTH THE MOTOR ARMATURE VOLTAGE AND MOTOR FIELD WINDING EXCITATION ARE VARIABLE TO EFFECT SPEED CONTROL, THE COMBINATION COMPRISING AN ARMATURE VOLTAGE SUPPLY SOURCE CONNECTED TO SAID ARMATURE, A FIELD WINDING VOLTAGE SUPPLY SOURCE CONNECTED TO SAID FIELD WINDING, A SETTABLE SPEED SELECTING MEANS CONNECTED ACROSS SAID FIELD WINDING FOR OBTAINING A SELECTED PORTION OF THE FIELD VOLTAGE CORRESPONDING TO THE SETTING OF SAID SELECTING MEANS, FIRST CONTROL MEANS RESPONSIVE TO SAID SELECTED PORTION FOR CONTROLLING THE VOLTAGE APPLIED TO SAID ARMATURE BY SAID ARMATURE VOLTAGE SUPPLY SOURCE, SECOND CONTROL MEANS
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) | 1967-09-08 | 1968-03-09 | 1968-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-08 | 1972-03-09 | 1972-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-08 | 1976-03-09 | 1976-09-08 | $7700.00 | Window Closed / Lapsed |