US3313148A
Expired / Lapsed
US
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Apparatus for measurement of the characteristics of internal friction
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
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Filing: 1964-05-21
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Granted: 1967-04-11
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Expires: 1984-05-21
Abstract
No abstract record available.
Inventors
- 👤 Dautreppe Daniel
- 👤 Friess Emmanuel
- 👤 Salvi Antoine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:05
CPC Classifications
G; G01; G01N; G01N3/00; G01N3/32; G01N3/38; G01M; G01M99/00; G01N2203/00; G01N2203/0014; G01N2203/0021; G01N2203/02; G01N2203/022; G01N2203/0222
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
DEVICE FOR THE DETERMINATION OF THE CHARACTERISTICS OF INTERNAL FRICTION OF A SAMPLE COMPRISING A TORSION PENDULUM, THE TORSION WIRE OF WHICH IS CONSTITUTED BY THE SAMPLE, A FIRST OSCILLATOR IN WHICH THE TUNED CIRCUIT COMPRISES AN ELEMENT WHICH IS COUPLED TO THE PENDULUM SO AS TO MODULATE ITS FREQUENCY WITH A SWING WHICH IS PROPORTIONAL TO THE AMPLITUDE OF OSCILLATORY MOVEMENTS OF THE PENDULUM, A FREQUENCY-GENERATOR DESIGNED TO SUPPLY A VOLTAGE WHICH IS PROPORTIONAL TO THE FREQUENCY SWING OF THE FIRST OSCILLATOR, MEANS FOR MEASURING SAID VOLTAGE AND ITS DIFFERENCE WITH RESPECT TO A REFERENCE VOLT-
Claim 2
Dependent Claim
97 words
DEVICE FOR THE DETERMINATION OF THE CHARACTERISTICS OF INTERNAL FRICTION OF A SAMPLE COMPRISING A TORSION PENDULUM, THE TORSION WIRE OF WHICH IS CONSTITUTED BY THE SAMPLE, A FIRST OSCILLATOR IN WHICH THE TUNED CIRCUIT COMPRISES AN ELEMENT WHICH IS COUPLED TO THE PENDULUM SO AS TO MODULATE ITS FREQUENCY WITH A SWING WHICH IS PROPORTIONAL TO THE AMPLITUDE OF OSCILLATORY MOVEMENTS OF THE PENDULUM, A FREQUENCY-GENERATOR DESIGNED TO SUPPLY A VOLTAGE WHICH IS PROPORTIONAL TO THE FREQUENCY SWING OF THE FIRST OSCILLATOR, MEANS FOR MEASURING SAID VOLTAGE AND ITS DIFFERENCE WITH RESPECT TO A REFERENCE VOLT-
References Cited (Backward Citations)
US2150377A
Cited
US2836060A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-04-10 | 1970-10-10 | 1971-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-10 | 1974-10-10 | 1975-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-10 | 1978-10-10 | 1979-04-11 | $7700.00 | Window Closed / Lapsed |