Patent US3956924A successfully refreshed from Google Patents.
US4066855A
Expired / Lapsed
US
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Vented membrane-type touch panel
Assignee: ST. CLAIR INTELLECTUAL PROPERTY CONSULTANTS, INC. A CORP. OF MI
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Filing: 1976-11-22
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Granted: 1978-01-03
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Expires: 1996-11-22
Abstract
Abstract A location sensitive touch panel for use on a rigid substrate. The substrate carries a first set of conductive strips. A resilient plastic membrane overlaying it carries a second set of conductive strips orthogonal to and spaced from the first set. Finger pressure can cause electrical contact between any one of the first set of strips and any one of the second set of strips. The substrate may be either flat or curved, with the membrane conforming to its contour. A vent in the membrane allows the membrane to assume its natural shape more quickly by allowing air to flow between the substrate and the membrane.
Inventors
- 👤 George Edward Zenk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:20
CPC Classifications
H; H01; H01H; H01H13/00; H01H13/70; H01H13/702; H01H13/82; H01H2213/00; H01H2213/002
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
163 words
A transparent switch matrix to be carried on the face of a rigid insulator substrate having a predetermined radius of curvature, and comprising: a. a plurality of spaced apart transparent conductive first strips firmly adhering to the face of the substrate; b. a transparent resilient membrane having an undistorted contour substantially alike the predetermined contour, and attached about its periphery to the face of the substrate in a position matching the membrane contour to the substrate contour and spaced apart from the first strips thereon in a predetermined area of the membrane, and having a vent permitting air flow into the space between the membrane and the substrate; and c. a plurality of transparent, flexible, spaced apart conductive second strips firmly adhering to the resilient membrane surface facing the substrate, each of said second strips located in the area spaced apart from the first strips and thinner than the spacing therefrom, and each of said second strips crossing at least two first strips.
Claim 2
Dependent Claim
163 words
A transparent switch matrix to be carried on the face of a rigid insulator substrate having a predetermined radius of curvature, and comprising: a. a plurality of spaced apart transparent conductive first strips firmly adhering to the face of the substrate; b. a transparent resilient membrane having an undistorted contour substantially alike the predetermined contour, and attached about its periphery to the face of the substrate in a position matching the membrane contour to the substrate contour and spaced apart from the first strips thereon in a predetermined area of the membrane, and having a vent permitting air flow into the space between the membrane and the substrate; and c. a plurality of transparent, flexible, spaced apart conductive second strips firmly adhering to the resilient membrane surface facing the substrate, each of said second strips located in the area spaced apart from the first strips and thinner than the spacing therefrom, and each of said second strips crossing at least two first strips.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-02 | 1981-07-04 | 1982-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-02 | 1985-07-04 | 1986-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-02 | 1989-07-04 | 1990-01-03 | $7700.00 | Window Closed / Lapsed |