Patent US3108212A successfully refreshed from Google Patents.
US3108212A
Expired / Lapsed
US
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Duty-factor controlled motor
Assignee: Hrb-Singer Inc
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Filing: 1960-02-29
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Granted: 1963-10-22
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Expires: 1980-02-29
Abstract
No abstract record available.
Inventors
- 👤 Harold J Nearhoof
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:13
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/28; H02P7/285; H02P7/29; H02P7/2913
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
AN ELECTRIC MOTOR CONTROL SYSTEM FOR CONTROLLING AN ANGULAR ROTATIONAL CHARACTERISTIC OF A MOTOR SHAFT COMPRISING, IN COMBINATION, A MOTOR INCLUDING A DRIVEN SHAFT AND WINDING MEANS ENERGIZABLE TO DRIVE SAID SHAFT AND TO DETERMINE AN ANGULAR ROTATIONAL CHARACTERISTIC THEREOF, A CONTROLLABLE SOURCE OF ENERGY FOR SAID MOTOR WINDING MEANS, UNIDIRECTIONAL CONDUCTING MEANS CONNECTED IN SHUNT RELATIONSHIP WITH SAID WINDING MEANS IN SUCH POLARITY AS TO PROVIDE A LOW IMPEDANCE PATH FOR REVERSE CURRENT FLOW THROUGH SAID WINDING MEANS UPON THE COLLAPSE OF THE FIELD THEREOF WHEN SAID WINDING MEANS ARE DE-ENERGIZED AND MEANS FOR CONTROLLING SAID ENERGY SOURCE IN ACCORDANCE WITH A DESIRED ANGULAR ROTATIONAL CHARACTERISTIC OF SAID MOTOR SHAFT.
Claim 2
Dependent Claim
111 words
AN ELECTRIC MOTOR CONTROL SYSTEM FOR CONTROLLING AN ANGULAR ROTATIONAL CHARACTERISTIC OF A MOTOR SHAFT COMPRISING, IN COMBINATION, A MOTOR INCLUDING A DRIVEN SHAFT AND WINDING MEANS ENERGIZABLE TO DRIVE SAID SHAFT AND TO DETERMINE AN ANGULAR ROTATIONAL CHARACTERISTIC THEREOF, A CONTROLLABLE SOURCE OF ENERGY FOR SAID MOTOR WINDING MEANS, UNIDIRECTIONAL CONDUCTING MEANS CONNECTED IN SHUNT RELATIONSHIP WITH SAID WINDING MEANS IN SUCH POLARITY AS TO PROVIDE A LOW IMPEDANCE PATH FOR REVERSE CURRENT FLOW THROUGH SAID WINDING MEANS UPON THE COLLAPSE OF THE FIELD THEREOF WHEN SAID WINDING MEANS ARE DE-ENERGIZED AND MEANS FOR CONTROLLING SAID ENERGY SOURCE IN ACCORDANCE WITH A DESIRED ANGULAR ROTATIONAL CHARACTERISTIC OF SAID MOTOR SHAFT.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-10-21 | 1967-04-22 | 1967-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-21 | 1971-04-22 | 1971-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-21 | 1975-04-22 | 1975-10-22 | $7700.00 | Window Closed / Lapsed |