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US3982219A Expired / Lapsed US ⏱️ 0.0 years remaining

Digital pressure/range transducer

Assignee: United States Department of the Army
•
Filing: 1975-02-19
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Granted: 1976-09-21
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Expires: 1995-02-19
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Abstract

Abstract A digital pressure/range transducer is disclosed. The transducer transformsn applied force into a mechanical movement which in turn closes a plurality of switches in ordered sequence. The number of switches closed gives a measure of the applied force. The transducer can be configured as a cable and when so configured the location of a closed switch or switches along the length of the cable can be determined.

Inventors

  • 👤 Dale J. Rehak

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-06 05:02
CPC Classifications
G; G01; G01L; G01L9/00; G01L9/0001; G01L9/0002; G01L1/00; G01L1/20; G01L1/205

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 312 words
A pressure transducer comprising: a first element made of rigid material; a plurality of parallel bare conductors attached to one surface of said first element; and a second element having at least one electrically conductive surface; and means to assemble said first and second element in such a manner that said plurality of parallel bare conductors is facing said at least one conductive surface of said second element but spaced apart therefrom, and such that the space between said at least one conductive surface and said plurality of parallel bare conductor progressively increases in a direction at right angles to the longitudinal axis of each of said plurality of parallel conductors such that said first and second elements form a wedge shape, said means to assemble said first and second elements being compressible whereby said plurality of parallel bare conductors will, under the influence of a force applied to said transducer, progressively contact said at least one conductive surface in an ordered sequence, the number of said plurality of parallel bare conductors contacting said at least one conductive surface under the influence of a given force being directly related to the magnitude of said force; the last said means including a first irregular shaped compressible element having a pocket in which said second element is secured, a ledge to support one edge of said first element and a channel, a second irregular shaped compressible element located in said channel and having a protrusion to support the other edge of said first element such that said other edge of said first element is separated from said at least one conductive surface of said first element by a distance greater than the distance that said one edge of said first element is separated from said at least one conductive surface of said second element, and a protective sheath covering the entire assembled pressure transducer.
Claim 2
Dependent Claim 312 words
A pressure transducer comprising: a first element made of rigid material; a plurality of parallel bare conductors attached to one surface of said first element; and a second element having at least one electrically conductive surface; and means to assemble said first and second element in such a manner that said plurality of parallel bare conductors is facing said at least one conductive surface of said second element but spaced apart therefrom, and such that the space between said at least one conductive surface and said plurality of parallel bare conductor progressively increases in a direction at right angles to the longitudinal axis of each of said plurality of parallel conductors such that said first and second elements form a wedge shape, said means to assemble said first and second elements being compressible whereby said plurality of parallel bare conductors will, under the influence of a force applied to said transducer, progressively contact said at least one conductive surface in an ordered sequence, the number of said plurality of parallel bare conductors contacting said at least one conductive surface under the influence of a given force being directly related to the magnitude of said force; the last said means including a first irregular shaped compressible element having a pocket in which said second element is secured, a ledge to support one edge of said first element and a channel, a second irregular shaped compressible element located in said channel and having a protrusion to support the other edge of said first element such that said other edge of said first element is separated from said at least one conductive surface of said first element by a distance greater than the distance that said one edge of said first element is separated from said at least one conductive surface of said second element, and a protective sheath covering the entire assembled pressure transducer.
Claim 3
Dependent Claim 18 words
A pressure transducer as defined in claim 1 wherein said pressure transducer is configured as a short segment.
Claim 4
Dependent Claim 17 words
A pressure transducer as defined in claim 1 wherein said transducer is configured as a long cable.
Claim 5
Dependent Claim 40 words
A pressure transducer as defined in claim 2 wherein a signal source is coupled to said second element and an individual conductor monitor responsive to said signal source is coupled to each conductor of said plurality of parallel bare conductors.
Claim 6
Dependent Claim 40 words
A pressure transducer as defined in claim 3 wherein a signal source is coupled to said second element and an individual conductor monitor responsive to said signal source is coupled to each conductor of said plurality of parallel bare conductors.
Claim 7
Dependent Claim 42 words
A pressure transducer as defined in claim 1 wherein said plurality of parallel bare conductors are round wires that are attached to said one surface of said first element by imbedding said round wires in said one surface of said first element.
Claim 8
Dependent Claim 28 words
A pressure transducer as defined in claim 1 wherein said plurality of parallel bare conductors are flat ribbon conductors formed on said one surface of said first element.
Claim 9
Dependent Claim 20 words
A pressure transducer as defined in claim 6 wherein said second element is entirely formed of an electrically conductive material.
Claim 10
Dependent Claim 20 words
A pressure transducer as defined in claim 7 wherein said second element is entirely formed from an electrically conductive material.

References Cited (Backward Citations)

US2345409A Cited
US2586544A Cited
GB1059186A Cited
US3610699A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1979-09-21 1980-03-22 1980-09-21 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1983-09-21 1984-03-22 1984-09-21 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1987-09-21 1988-03-22 1988-09-21 $7700.00 Window Closed / Lapsed

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