US3561261A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Torsional exciter apparatus
Assignee: Brookside Corp
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Filing: 1969-06-30
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Granted: 1971-02-09
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Expires: 1989-06-30
Abstract
Abstract TORSIONAL EXCITER APPARATUS COMPRISING A DC MOTOR WITH RELATIVELY FIXED MAGNETIC FIELDS ONE OF WHICH IS CONNECTED WITH AN AC SUPPLY ADJUSTABLE AS TO FREQUENCY AND AMPLITUDE FOR PROVIDING TORQUE PULSATIONS OF SELECTED FREQUENCY AND AMPLITUDE. THE APPARATUS IS USABLE AS BOTH A STATIONARY AND A ROTARY TORSIONAL SHAKER, AS A PRELOADING AND TORSIONAL SHAKING DEVICE, AND AS AN ABSORPTION DYNAMOMETER WHICH TRANSMITS TROSIONAL PULSATIONS TO A DRIVING DEVICE UNDER TEST.
Inventors
- 👤 Jay P Conniff
- 👤 William F Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:46
CPC Classifications
G; G01; G01N; G01N3/00; G01N3/08; G01N3/16; G01M; G01M7/00; G01N3/32; G01N2291/00; G01N2291/02; G01N2291/028; G01N2291/02827
Claims Analysis
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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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |