US3105381A
Expired / Lapsed
US
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Arrangement for measuring the damping of the oscillations of a mechanical system
Assignee: Institut de Recherches de la Siderurgie Francaise IRSID
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Filing: 1961-01-31
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Granted: 1963-10-01
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Expires: 1981-01-31
Abstract
No abstract record available.
Inventors
- 👤 Collette Gaston Alexandre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:32
CPC Classifications
G; G01; G01N; G01N3/00; G01N3/32; G01H; G01H9/00; G01N2203/00; G01N2203/0014; G01N2203/0021
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
AN ARRANGEMENT FOR MEASURING THE DAMPING OF THE OSCILLATIONS OF A MECHANICAL SYSTEM, COMPRISING AN OPAQUE RULE PROVIDED WITH A PLURALITY OF FINE PARALLEL TRANSPARENT SLOTS, A SOURCE OF LUMINOUS RAYS, AN OPTICAL SYSTEM SECURED TO THE OSCILLATING MECHANICAL SYSTEM FOR PROJECTING AN IMAGE OF SAID SOURCE ON THE RULE ALONG A SECTION THEREOF DEPENDING ON THE MOMENTARY ANGULAR POSITION OF THE MECHANICAL SYSTEM TO REGISTER DURING EACH OSCILLATION OF THE MECHANICAL SYSTEM WITH A NUMBER OF SLOTS INCREASING WITH THE AMPLITUDE OF THE OSCILLATION, AND A PLURALITY OF COUNTING MEANS SENSITIVE TO PREDETERMINED MODIFICATIONS IN ILLUMINATION AND RESPECTIVELY LOCATED BEHIND SAID SLOTS.
Claim 2
Dependent Claim
103 words
AN ARRANGEMENT FOR MEASURING THE DAMPING OF THE OSCILLATIONS OF A MECHANICAL SYSTEM, COMPRISING AN OPAQUE RULE PROVIDED WITH A PLURALITY OF FINE PARALLEL TRANSPARENT SLOTS, A SOURCE OF LUMINOUS RAYS, AN OPTICAL SYSTEM SECURED TO THE OSCILLATING MECHANICAL SYSTEM FOR PROJECTING AN IMAGE OF SAID SOURCE ON THE RULE ALONG A SECTION THEREOF DEPENDING ON THE MOMENTARY ANGULAR POSITION OF THE MECHANICAL SYSTEM TO REGISTER DURING EACH OSCILLATION OF THE MECHANICAL SYSTEM WITH A NUMBER OF SLOTS INCREASING WITH THE AMPLITUDE OF THE OSCILLATION, AND A PLURALITY OF COUNTING MEANS SENSITIVE TO PREDETERMINED MODIFICATIONS IN ILLUMINATION AND RESPECTIVELY LOCATED BEHIND SAID SLOTS.
References Cited (Backward Citations)
DE649213C
Cited
US2593389A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-09-30 | 1967-04-01 | 1967-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-30 | 1971-04-01 | 1971-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-30 | 1975-04-01 | 1975-10-01 | $7700.00 | Window Closed / Lapsed |