Solid state keyboard

Details Solid state keyboard Solid state keyboard

H - Electricity

03

M

340/175

H03M 11/00 (2006.01) H03K 17/96 (2006.01) H03M 11/22 (2006.01)

Patent

CA 1249046

ABSTRACT OF THE DISCLOSURE A housing constructed to define individual areas for depression to identify individual indicia, a hard electrically insulating material attached to the housing to transmit strains produced in the housing by the depression of the individual areas, a plurality of thin sheets of an electrically insulating material each attached to the insulating material at positions corresponding to the individual areas in the housing, a plurality of thin sheets of an electrically conductive member each attached to an individual one of the electrically insulating sheets, and a plurality of ceramic crystals each attached to an individual one of the electrically conductive sheets.

435818

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