04490587 is referenced by 44 patents and cites 12 patents.

A switch assembly comprising a flexible face cover membrane; a flexible keyboard membrane positioned immediately below the face cover membrane and including a base portion and a plurality of raised hollow contact pad portions projecting upwardly from the base portion through openings in the face cover member; a flexible printed circuit board membrane positioned below the keyboard membrane for switching coaction with the contact pad portions of the keyboard membrane; and adhesive means bonding the membranes together into a thin, flexible sealed switch sandwich. In one embodiment of the invention, the keyboard membrane is formed of a non-conductive elastomeric material and conductive elastomeric buttons are secured to the underside of the contact pad portions of the keyboard membrane for coaction with printed circuitry on the upper surface of the circuit board membrane.

Title
Switch assembly
Application Number
6/482832
Publication Number
4490587
Application Date
April 7, 1983
Publication Date
December 25, 1984
Inventor
Charles D Stelzner
Hoffman Estates
IL, US
Paul H Miller
Wheaton
IL, US
Agent
Lyman R Lyon
Assignee
Microdot
CT, US
IPC
H01H 13/70
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