Patent US3079523A successfully refreshed from Google Patents.
US3079523A
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Speed-regulating system for direct-current commutator motors
Assignee: ELAC Electroacustic GmbH
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Filing: 1961-08-21
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Granted: 1963-02-26
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Expires: 1981-08-21
Abstract
No abstract record available.
Inventors
- 👤 Thieme Siegfried
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:04
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/28; H02P7/285; H02P7/29; H02P7/291; Y; Y10; Y10S; Y10S388/00; Y10S388/907; Y10S388/922
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A SYSTEM FOR REGULATING THE SPEED OF A DIRECT-CURRENT MOTOR, COMPRISING DIRECT-VOLTAGE SUPPLY LEADS, A DIRECTCURRENT MOTOR HAVING A COMMUTATOR CIRCUIT CONNECTED TO SAID LEADS TO BE ENERGIZED THEREFROM, AN ELECTRONIC VARIABLE RESISTANCE MEMBER SERIES-CONNECTED IN SAID CIRCUIT AND HAVING A CONTROL ELECTRODE FOR CONTROLLING THE RESISTANCE OF SAID MEMBER, SENSING MEANS COUPLED WITH SAID CIRCUIT AND RESPONSIVE TO THE FREQUENCY OF THE PULSATING VOLTAGE COMPONENT DUE TO COMMUTATION OF SAID MOTOR, AND CIRCUIT MEANS CONNECTING SAID SENSING MEANS WITH SAID CONTROL ELECTRODE FOR CAUSING THE LATTER TO CONTROL SAID RESISTANCE FOR CONSTANT SPEED OF SAID MOTOR.
Claim 2
Independent Claim
97 words
A SYSTEM FOR REGULATING THE SPEED OF A DIRECT-CURRENT MOTOR, COMPRISING DIRECT-VOLTAGE SUPPLY LEADS, A DIRECTCURRENT MOTOR HAVING A COMMUTATOR CIRCUIT CONNECTED TO SAID LEADS TO BE ENERGIZED THEREFROM, AN ELECTRONIC VARIABLE RESISTANCE MEMBER SERIES-CONNECTED IN SAID CIRCUIT AND HAVING A CONTROL ELECTRODE FOR CONTROLLING THE RESISTANCE OF SAID MEMBER, SENSING MEANS COUPLED WITH SAID CIRCUIT AND RESPONSIVE TO THE FREQUENCY OF THE PULSATING VOLTAGE COMPONENT DUE TO COMMUTATION OF SAID MOTOR, AND CIRCUIT MEANS CONNECTING SAID SENSING MEANS WITH SAID CONTROL ELECTRODE FOR CAUSING THE LATTER TO CONTROL SAID RESISTANCE FOR CONSTANT SPEED OF SAID MOTOR.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-02-25 | 1966-08-27 | 1967-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-25 | 1970-08-27 | 1971-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-25 | 1974-08-27 | 1975-02-26 | $7700.00 | Window Closed / Lapsed |