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US3308476A
Expired / Lapsed
US
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Resonant sensing devices
Assignee: Individual
•
Filing: 1964-01-21
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Granted: 1967-03-07
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Expires: 1984-01-21
Abstract
No abstract record available.
Inventors
- 👤 Kleesattel Claus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:04
CPC Classifications
G; G01; G01L; G01L1/00; G01L1/16; G01L1/162; G01L1/10; G01N; G01N3/00; G01N3/40; G01N3/405; G01N2203/00; G01N2203/003; G01N2203/005; G01N2203/0051; G01N2291/00; G01N2291/02; G01N2291/028; G01N2291/02827; Y; Y10; Y10S; Y10S73/00; Y10S73/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
230 words
A RESONANT SENSING DEVICE COMPRISING AN ELONGATED METAL ROD HAVING A TIP AT ONE END WITH A ROUNDED CONTACT SURFACE ADAPTED TO ENGAGE A SOLID MEMBER SO THAT THE RESONANCE FREQUENCY OF SAID ROD IS DEPENDENT UPON THE COMPLIANCE AT THE AREA OF CONTACT OF SAID TIP WITH THE SOLID MEMBER, ELECTRICALLY ENERGIZED MEANS FOR LONGITUDINALLY VIBRATING SAID ROD AT SAID RESONANCE FREQUENCY OF THE LATTER, SAID ROD HAVING A LENGTH EQUAL TO $/4+(N-1)$/2, IN WHICH $ IS THE WAVELENGTH OF THE STANDING WAVE ON THE ROD AT THE RESONANCE FREQUENCY OF THE LATTER FOR INFINITE COMPLIANCE AT SAID TIP AND N IS A WHOLE INTEGER, A BODY JOINED TO THE OTHER END OF SAID ROD AND HAVING A MECHANICAL IMPEDANCE SUBSTANTIALLY GREATER THAN THE MECHANICAL IMPEDANCE OF SAID ROD SO THAT THE RESONANCE FREQUENCY OF SAID ROD IS SUBJECT TO RELATIVELY LARGE CHANGES IN RESPONSE TO CHANGES IN SAID COMPLIANCE AT THE AREA OF CONTACT OF SAID TIP AND SAID BODY HAS SMALL AMPLITUDE OF VIBRATION THEREALONG AS COMPARED WITH THE AMPLITUDE OF VIBRATION AT SAID TIP, AND MEANS FOR APPLYING AN AXIAL FORCE TO SAID ROD AT SAID OTHER END IN THE DIRECTION TOWARD SAID ONE END SO THAT THE COMPLIANCE AT THE AREA OF CONTACT OF THE TIP WITH THE SOLID MEMBER IS DETERMINED BY THE SURFACE CHARACTERISTICS OF SAID MEMBER AND THE MAGNITUDE OF SAID FORCE.
Claim 2
Dependent Claim
230 words
A RESONANT SENSING DEVICE COMPRISING AN ELONGATED METAL ROD HAVING A TIP AT ONE END WITH A ROUNDED CONTACT SURFACE ADAPTED TO ENGAGE A SOLID MEMBER SO THAT THE RESONANCE FREQUENCY OF SAID ROD IS DEPENDENT UPON THE COMPLIANCE AT THE AREA OF CONTACT OF SAID TIP WITH THE SOLID MEMBER, ELECTRICALLY ENERGIZED MEANS FOR LONGITUDINALLY VIBRATING SAID ROD AT SAID RESONANCE FREQUENCY OF THE LATTER, SAID ROD HAVING A LENGTH EQUAL TO $/4+(N-1)$/2, IN WHICH $ IS THE WAVELENGTH OF THE STANDING WAVE ON THE ROD AT THE RESONANCE FREQUENCY OF THE LATTER FOR INFINITE COMPLIANCE AT SAID TIP AND N IS A WHOLE INTEGER, A BODY JOINED TO THE OTHER END OF SAID ROD AND HAVING A MECHANICAL IMPEDANCE SUBSTANTIALLY GREATER THAN THE MECHANICAL IMPEDANCE OF SAID ROD SO THAT THE RESONANCE FREQUENCY OF SAID ROD IS SUBJECT TO RELATIVELY LARGE CHANGES IN RESPONSE TO CHANGES IN SAID COMPLIANCE AT THE AREA OF CONTACT OF SAID TIP AND SAID BODY HAS SMALL AMPLITUDE OF VIBRATION THEREALONG AS COMPARED WITH THE AMPLITUDE OF VIBRATION AT SAID TIP, AND MEANS FOR APPLYING AN AXIAL FORCE TO SAID ROD AT SAID OTHER END IN THE DIRECTION TOWARD SAID ONE END SO THAT THE COMPLIANCE AT THE AREA OF CONTACT OF THE TIP WITH THE SOLID MEMBER IS DETERMINED BY THE SURFACE CHARACTERISTICS OF SAID MEMBER AND THE MAGNITUDE OF SAID FORCE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |