US4386527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic measuring instrument
Assignee: EIDP Inc
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Filing: 1981-05-04
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Granted: 1983-06-07
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Expires: 2001-05-04
Abstract
Abstract An instrument for distinguishing between gray and ductile cast iron pipes. Signals from a relatively movable pair of ultrasonic probes and a distance transducer are inputs to a circuit for generating a signal related to the velocity of sound through a chord of a pipe.
Inventors
- 👤 Charles Maucher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:01
CPC Classifications
G; G01; G01N; G01N29/00; G01N29/04; G01N29/07
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
113 words
A portable instrument comprising: an elongated support; a first ultrasonic transducer fixed mounted with respect to said support; a second ultrasonic transducer slidably mounted with respect to said support; a potentiometer operably connected between the transducers for generating a signal dependent on the distance therebetween; first circuitry connected to the transducers for generating a signal related to the elapsed time for transmission of sound energy through an object located between the transducers; and second circuitry connected to the first circuitry and said potentiometer for generating a signal representative of the velocity of the sound energy, said velocity signal being based on the distance between said transducers and the output of said first circuitry.
Claim 2
Dependent Claim
113 words
A portable instrument comprising: an elongated support; a first ultrasonic transducer fixed mounted with respect to said support; a second ultrasonic transducer slidably mounted with respect to said support; a potentiometer operably connected between the transducers for generating a signal dependent on the distance therebetween; first circuitry connected to the transducers for generating a signal related to the elapsed time for transmission of sound energy through an object located between the transducers; and second circuitry connected to the first circuitry and said potentiometer for generating a signal representative of the velocity of the sound energy, said velocity signal being based on the distance between said transducers and the output of said first circuitry.
Claim 3
Dependent Claim
47 words
The instrument of claim 1 wherein is provided a pair of plastic shoes, each having an angularly disposed surface adapted to bear against a round object and carrying one of the transducers, one shoe being fixedly mounted, the other for sliding movement with respect to said support.
Claim 4
Dependent Claim
24 words
The instrument of claim 1 wherein said potentiometer is a rotary potentiometer and wherein is provided a rack-and-pinion coupling between the support and potentiometer.
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) | 1986-06-06 | 1986-12-06 | 1987-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-06 | 1990-12-06 | 1991-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-06 | 1994-12-06 | 1995-06-07 | $7700.00 | Window Closed / Lapsed |