Patent US557986A successfully refreshed from Google Patents.
Patent US3203635A successfully refreshed from Google Patents.
US3203635A
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Servo control system
Assignee: Unisys Corp
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Filing: 1962-07-30
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Granted: 1965-08-31
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Expires: 1982-07-30
Abstract
No abstract record available.
Inventors
- 👤 Harry F Rayfield
- 👤 Wilkinson Gregory
- 👤 Rahmat A Aziz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:48
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/56; G11B15/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
168 words
A REEL SERVO CONTROL SYSTEM FOR CONTROLLING THE POSITION OF THE END OF A LOOP OF A LONGITUDINALLY MOVING FLEXIBLE MATERIAL RELATIVE TO A REFEREENCE POSITION, COMPRISING: A REEL HAVING A LENGTH OF FLEXIBLE MATERIAL WOUND THEREON; MEAS FOR DIRECTING THE MATERIAL FROM THE REEL TO FORM A LOOP; MEANS FOR LINGITUDINALLY DRIVING THE MATERIAL TO CAUSE THE REEL TO ROTATE; A LIGHT SOURCE POSITIONED ON ONE SIDE OF THE LOOP; A PLURALAITY OF SEPARATE TIGHT DETECTING MEANS PHYSICALLY ALIGNED ON AN OPPOSITE SIDE OF THE LOOP SUCH THAT THE MATERIAL, IN MOVING, CAUSES THE END OF THE LOOP IN MOVE IN A PLANE SUBSTANTIALLY PARALLEL WITH THE LIGHT SOURCE; A MOTOR FOR DEVELOPING A ROTATIONAL OUTPUT, THE DIRECTION OF WHICH IS DETERMINED BY THE DIRECTION OF UNIDIRECTIONAL CURRENT FLOW THROUGH THE MOTOR; MEANS FOR COUPLING THE MOTOR TO THE REEL TO DRIVE THE REEL IN A DIRECTION DETERMINED BY THE DIRECTION OF THE ROTATIONAL OUTPUT OF THE MOTOR; INPUT MEANS FOR RECEIVING AN ALTERNATING CURRENT INPUT SIGNAL;
Claim 2
Dependent Claim
168 words
A REEL SERVO CONTROL SYSTEM FOR CONTROLLING THE POSITION OF THE END OF A LOOP OF A LONGITUDINALLY MOVING FLEXIBLE MATERIAL RELATIVE TO A REFEREENCE POSITION, COMPRISING: A REEL HAVING A LENGTH OF FLEXIBLE MATERIAL WOUND THEREON; MEAS FOR DIRECTING THE MATERIAL FROM THE REEL TO FORM A LOOP; MEANS FOR LINGITUDINALLY DRIVING THE MATERIAL TO CAUSE THE REEL TO ROTATE; A LIGHT SOURCE POSITIONED ON ONE SIDE OF THE LOOP; A PLURALAITY OF SEPARATE TIGHT DETECTING MEANS PHYSICALLY ALIGNED ON AN OPPOSITE SIDE OF THE LOOP SUCH THAT THE MATERIAL, IN MOVING, CAUSES THE END OF THE LOOP IN MOVE IN A PLANE SUBSTANTIALLY PARALLEL WITH THE LIGHT SOURCE; A MOTOR FOR DEVELOPING A ROTATIONAL OUTPUT, THE DIRECTION OF WHICH IS DETERMINED BY THE DIRECTION OF UNIDIRECTIONAL CURRENT FLOW THROUGH THE MOTOR; MEANS FOR COUPLING THE MOTOR TO THE REEL TO DRIVE THE REEL IN A DIRECTION DETERMINED BY THE DIRECTION OF THE ROTATIONAL OUTPUT OF THE MOTOR; INPUT MEANS FOR RECEIVING AN ALTERNATING CURRENT INPUT SIGNAL;
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) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |