US3104349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Backlash compensation position control servosystem
Assignee: Bell and Howell Co
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Filing: 1960-08-08
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Granted: 1963-09-17
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Expires: 1980-08-08
Abstract
No abstract record available.
Inventors
- 👤 Du Wayne E Stevens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:40
CPC Classifications
B; B23; B23Q; B23Q15/00; B24; B24B; B24B47/00; B24B47/28; G; G05; G05D; G05D3/00; G05D3/12; G05D3/14; G05D3/1418; G05B; G05B2219/00; G05B2219/30; G05B2219/41; G05B2219/41068; G05B2219/41354; G05B2219/45; G05B2219/45161; Y; Y10; Y10T; Y10T409/00; Y10T409/30; Y10T409/306664; Y10T82/00; Y10T82/20; Y10T82/25; Y10T82/2531; Y10T82/2549
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
118 words
IN A SERVO SYSTEM INCLUDING A TOOL AND MEANS FOR MOVING THE TOOL WITHIN PREDETERMINED LIMITS OF ERROR, THE COMBINATION THEREWITH OF AN ELECTROSTATIC SCREW, AN ELECTROSTATIC NUT FORMING CAPACITOR MEANS WITH THE ELECTROSTATIC SCREW, BRIDGE CIRCUIT MEANS INCLUDING THE CAPACITOR MEANS, OSCILLATOR MEANS FOR SUPPLYING A REFERENCE ALTERNATING CURRENT SIGNAL TO THE BRIDGE CIRCUIT MEANS, AMPLIFYING MEANS FOR AMPLIFYING THE OUTPUT OF THE BRIDGE CIRCUIT MEANS, PHASE DISCRIMINATOR MEANS RESPONSIVE TO PHASE DIFFERENCE BETWEEN THE INPUT TO THE BRIDGE CIRCUIT MEANS AND THE AMPLIFIED OUTPUT THEREFROM, AMPLIFIER MEANS DRIVEN BY THE OUTPUT OF THE PHASE DISCRIMINATOR MEANS, AND TRANSDUCER MEANS OPERABLE BY THE AMPLIFIER MEANS TO MOVE THE TOOL RELATIVE TO THE MEANS FOR MOVING THE TOOL.
References Cited (Backward Citations)
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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) | 1966-09-16 | 1967-03-18 | 1967-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-16 | 1971-03-18 | 1971-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-16 | 1975-03-18 | 1975-09-17 | $7700.00 | Window Closed / Lapsed |