Patent US3086238A successfully refreshed from Google Patents.
US3086238A
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Electric motor speed controller
Assignee: Ford Motor Co
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Filing: 1961-10-18
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Granted: 1963-04-23
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Expires: 1981-10-18
Abstract
No abstract record available.
Inventors
- 👤 Donald H Baumhart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:59
CPC Classifications
H; H01; H01C; H01C10/00; H01C10/10; H01C10/12; B; B60; B60S; B60S1/00; B60S1/02; B60S1/04; B60S1/06; B60S1/08; H02; H02P; H02P29/00; H02P29/40; Y; Y10; Y10S; Y10S318/00; Y10S318/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
IN AN ELECTRIC CIRCUIT THE COMBINATION COMPRISING, AN ELECTRIC MOTOR HAVING AN ARMATURE, A VARIABLE RESISTOR POSITIONED IN SERIES WITH THE ARMATURE OF SAID ELECTRIC MOTOR, AND MEANS RESPONSIVE TO THE CURRENT DRAWN BY SAID ARMATURE FOR VARYING THE RESISTANCE OF SAID VARIABLE RESISTOR AS AN INVERSE FUNCTION OF THE CURRENT DRAWN BY SAID ARMATURE.
Claim 2
Dependent Claim
55 words
IN AN ELECTRIC CIRCUIT THE COMBINATION COMPRISING, AN ELECTRIC MOTOR HAVING AN ARMATURE, A VARIABLE RESISTOR POSITIONED IN SERIES WITH THE ARMATURE OF SAID ELECTRIC MOTOR, AND MEANS RESPONSIVE TO THE CURRENT DRAWN BY SAID ARMATURE FOR VARYING THE RESISTANCE OF SAID VARIABLE RESISTOR AS AN INVERSE FUNCTION OF THE CURRENT DRAWN BY SAID ARMATURE.
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) | 1966-04-22 | 1966-10-22 | 1967-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-22 | 1970-10-22 | 1971-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-22 | 1974-10-22 | 1975-04-23 | $7700.00 | Window Closed / Lapsed |