DE2164202

A keyboard switching arrangement that is mechanically simple, reliable, and which can be fabricated with an overall thickness of less than 1/4 inch, includes a plurality of independent conductive elements aligned with holes in a protective front cover. A single sheet of a metallized foil electret is...

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Bibliographic Details
Main Authors WEST, JAMES EDWARD, PLAINFIELD, SESSLER, GERHARD MARTIN, SUMMIT, WALLACE JUN., ROBERT LEE, WARREN TOWNSHIP
Format Patent
LanguageEnglish
Published 18.10.1973
Edition1
Subjects
BASIC ELECTRIC ELEMENTS
BASIC ELECTRONIC CIRCUITRY
CAPACITORS
CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES ORLIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
PULSE TECHNIQUE
TELEPHONIC COMMUNICATION
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Summary:A keyboard switching arrangement that is mechanically simple, reliable, and which can be fabricated with an overall thickness of less than 1/4 inch, includes a plurality of independent conductive elements aligned with holes in a protective front cover. A single sheet of a metallized foil electret is interposed between the cover and the conductive members. The metal layer of the foil forms a capacitive transducer with each backplate section. Each switch is operated by touching the foil electret through one of the cover holes. The resulting displacement generates an electric output signal which is utilized for actuating an associated switching element or the like.
Bibliography:Application Number: DE19712164202