US3089988A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slewing motor servo system with null sensing relay circuit
Assignee: International Business Machines Corp
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Filing: 1960-06-29
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Granted: 1963-05-14
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Expires: 1980-06-29
Abstract
No abstract record available.
Inventors
- 👤 Warner E Stillings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:10
CPC Classifications
G; G05; G05D; G05D3/00; G05D3/12; G05D3/14; G05D3/1445
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A SERVO SYSTEM COMPRISING MEANS MOVABLE TO A NUMBER OF POSITIONS, MEANS RESPONSIVE TO THE ACTUAL POSITION OF SAID MOVABLE MEANS AND A DESIRED POSITION FOR SAID MOVABLE MEANS FOR GENERATING AN ERROR SIGNAL OF VARIABLE MAGNITUDE, FIRST TORQUE PRODUCING MEANS RESPONSIVE TO SAID ERROR SIGNAL FOR MOVING SAID MOVABLE MEANS, A ZENER DIODE CONNECTED TO BE BROKEN DOWN BY A CERTAIN MAGNITUDE RANGE OF SAID ERROR SIGNAL, SWITCH MEANS RESPONSIVE TO SAID ERROR SIGNAL ONLY WHEN SAID ZENER DIODE IS BROKEN DOWN, AND SECOND TORQUE PRODUCING MEANS RESPONSIVE TO THE OPERATION OF SAID SWITCH MEANS FOR MOVING SAID MOVABLE MEANS.
Claim 2
Dependent Claim
101 words
A SERVO SYSTEM COMPRISING MEANS MOVABLE TO A NUMBER OF POSITIONS, MEANS RESPONSIVE TO THE ACTUAL POSITION OF SAID MOVABLE MEANS AND A DESIRED POSITION FOR SAID MOVABLE MEANS FOR GENERATING AN ERROR SIGNAL OF VARIABLE MAGNITUDE, FIRST TORQUE PRODUCING MEANS RESPONSIVE TO SAID ERROR SIGNAL FOR MOVING SAID MOVABLE MEANS, A ZENER DIODE CONNECTED TO BE BROKEN DOWN BY A CERTAIN MAGNITUDE RANGE OF SAID ERROR SIGNAL, SWITCH MEANS RESPONSIVE TO SAID ERROR SIGNAL ONLY WHEN SAID ZENER DIODE IS BROKEN DOWN, AND SECOND TORQUE PRODUCING MEANS RESPONSIVE TO THE OPERATION OF SAID SWITCH MEANS FOR MOVING SAID MOVABLE MEANS.
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) | 1966-05-13 | 1966-11-12 | 1967-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-13 | 1970-11-12 | 1971-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-13 | 1974-11-12 | 1975-05-14 | $7700.00 | Window Closed / Lapsed |