Patent US3215918A successfully refreshed from Google Patents.
US3215918A
Expired / Lapsed
US
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Servo controlled drive mechanism
Assignee: Ampex Corp
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Filing: 1962-06-01
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Granted: 1965-11-02
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Expires: 1982-06-01
Abstract
No abstract record available.
Inventors
- 👤 Lichowsky Abraham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:52
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/04; G; G11; G11B; G11B15/00; G11B15/18; G11B15/46; G11B15/54; H02; H02P; H02P23/00; H02P23/18; H02P23/186; H02P21/00; Y; Y10; Y10S; Y10S388/00; Y10S388/923; Y10S388/93; Y10S388/932
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A MOTOR CONTROLLING ARRANGEMENT FOR REGULATING A MOTOR AT A PRESELECTED SPEED COMPRISING: A DRIVE MOTOR HAVING CONTINUOUSLY ENERGIZED DRIVE AND BRAKE WINDINGS; MEANS FOR CONNECTING THE DRIVE WINDING TO A SOURCE OF ELECTRICAL POWER; A SPEED DETECTOR MECHANICALLY COUPLED TO THE MOTOR; MEANS FOR SELECTING A DESIRED SPEED OF ROTATION FOR SAID MOTORS COUPLED TO THE SPEED DETECTOR; MEANS COUPLED TO THE SPEED SELECTOR AND ADAPTER TO RECEIVE ELECTRICAL SIGNAL INDICATIVE OF THE MOTOR SPEED
Claim 2
Dependent Claim
76 words
A MOTOR CONTROLLING ARRANGEMENT FOR REGULATING A MOTOR AT A PRESELECTED SPEED COMPRISING: A DRIVE MOTOR HAVING CONTINUOUSLY ENERGIZED DRIVE AND BRAKE WINDINGS; MEANS FOR CONNECTING THE DRIVE WINDING TO A SOURCE OF ELECTRICAL POWER; A SPEED DETECTOR MECHANICALLY COUPLED TO THE MOTOR; MEANS FOR SELECTING A DESIRED SPEED OF ROTATION FOR SAID MOTORS COUPLED TO THE SPEED DETECTOR; MEANS COUPLED TO THE SPEED SELECTOR AND ADAPTER TO RECEIVE ELECTRICAL SIGNAL INDICATIVE OF THE MOTOR SPEED
References Cited (Backward Citations)
US2636157A
Cited
US2866143A
Cited
US2945997A
Cited
US3097267A
Cited
US3005940A
Cited
US3084307A
Cited
US3090901A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |