US3608366A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Torsion pendulum
Assignee: UNIROYAL HOLDING Inc WORLD HEADQUARTERS MIDDLEBURY CONNECTICUT 06749 A CORP OF NEW JERSEY
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Filing: 1969-08-25
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Granted: 1971-09-28
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Expires: 1989-08-25
Abstract
Abstract TORSION PENDULUM TEST APPARATUS IN WHICH A SAMPLE OF MATERIAL UNDER TEST IS USED AS THE RESTORING ELEMENT IN AN ANGULAR OSCILLATION SYSTEM. IN CONTRAST TO EARLIER DEVICES OF THIS TYPE, A COUNTERBALANCE WEIGHT IS EMPLOYED TO ELIMINATE COMPLETELY ALL VERTICAL FORCES UPON THE SAMPLE, AN ANGULARLY OSCILLATING OPTICAL WEDGE AND PHOTOELECTRIC SYSTEM IS USED FOR SENSING THE AMPLITUDE OF OSCILLATION, AND AIR BEARINGS ARE USED FOR STABILIZATION. THE DEVICE GIVES VERY ACCURATE READINGS FOR DETERMINING DYNAMIC MECHANICAL PROPERTIES AND PHASE TRANSITION TEMPERATURES.
Inventors
- 👤 Noboru Tokita
- 👤 Randolph Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:08
CPC Classifications
G; G01; G01N; G01N3/00; G01N3/32; G01N2203/00; G01N2203/0014; G01N2203/0021
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |