Patent EP0058849A2 successfully refreshed from Google Patents.
EP0058849A2
Expired / Lapsed
EP
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Membrane keyboard assembly
Assignee: Motorola Solutions Inc
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Filing: 1982-02-03
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Granted: —
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Expires: 2002-02-03
Abstract
Abstract The assembly includes a flexible insulating film (12) with indicia (21) visible on the upper surface and conductive contacts (14, 16, 18) on the lower surface. The top film may be comprised of two separate films (20, 12) for ease of applying the indicia and the contacts. The other contact of each SPST switch is a ground or reference contact formed by a chassis (10) or other relatively large and rigid conductive surface. A resilient spacer (22) is retained between the upper and lower switch contact surfaces and contains an aperture in registration with each upper switch contact.
Inventors
- 👤 Robert Langford Anderson, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 20:59
CPC Classifications
H; H01; H01H; H01H13/00; H01H13/70; H01H13/702; H01H2209/00; H01H2209/024; H01H2209/026; H01H2229/00; H01H2229/002; H01H2229/004; H01H2239/00; H01H2239/008
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
129 words
A membrane keyboard assembly for a device including electronic circuitry and comprising: a flexible insulating member (12); conductive areas (14, 16, 18) on a first surface of the insulating member, each area including at least one pad portion and a connecting link extending at least near the edge of the member for connecting to respective portions of the electronic circuitry; a rigid conductive member (10) adapted to be coupled to a reference terminal in the circuitry; and a resilient insulating foam spacer (22) with one surface of the spacer being adhesively attached to the rigid member, the other surface of the spacer being adhesively attached to the first surface of the insulating member, and the spacer having one aperture in registration with each pad portion of the conductive areas.
Claim 2
Dependent Claim
129 words
A membrane keyboard assembly for a device including electronic circuitry and comprising: a flexible insulating member (12); conductive areas (14, 16, 18) on a first surface of the insulating member, each area including at least one pad portion and a connecting link extending at least near the edge of the member for connecting to respective portions of the electronic circuitry; a rigid conductive member (10) adapted to be coupled to a reference terminal in the circuitry; and a resilient insulating foam spacer (22) with one surface of the spacer being adhesively attached to the rigid member, the other surface of the spacer being adhesively attached to the first surface of the insulating member, and the spacer having one aperture in registration with each pad portion of the conductive areas.
Claim 3
Dependent Claim
25 words
A membrane keyboard assembly in accordance with claim 1 wherein the rigid conductive member forms at least a portion of the chassis of the device.
Claim 4
Dependent Claim
21 words
A membrane keyboard assembly in accordance with claim 1 wherein the flexible insulating member is comprised of a film of polyester.
Claim 5
Dependent Claim
32 words
A membrane keyboard assembly in accordance with claim 1 wherein the flexible insulating member is comprised of a first polyester film bearing the conductive surfaces and a second polyester film bearing indicia.
References Cited (Backward Citations)
No citation records indexed.
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