Browse Prior Art Database

ELASTOMERIC KEYSWITCH

IP.com Disclosure Number: IPCOM000023905D
Original Publication Date: 1979-Apr-30
Included in the Prior Art Database: 2004-Apr-01
Document File: 2 page(s) / 212K

Publishing Venue

Xerox Disclosure Journal

Abstract

Disclosed is a keyswitch which provides an indication of switch closure free of a hard-stop condition, That result is achieved by providing a conductive elastomer 2 between a moveable, metallic, spring-type contact 4 and a stationary member -6. The force-displacement characteristic of the keyswitch is substantially linear until the metallic, spring-type contact 4 meets the elastomer 2 with the force required to produce additional displacement, increasing greatly when the metallic spring-type contact 4 and elastomer 2 move together. The increased force needed to provide displacement of the spring-type switch after it meets the elastomer 2 provides an indication of switch closure free of a hard-stop condition,

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ELASTOMERIC KEYSWITCH

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XEROX DISCLOSURE JOURNAL

Proposed Classification U~S~CL 200/5A
mt CL HOlh 9/26

           ELASTOMERIC 5PR~NC, ~If~CH CLOSURE ME~ALLJCSPR~NG~TYPECONTACT DISPLACEMENT

Disclosed is a keyswitch which provides an indication of switch closure free of a hard-stop condition, That result is achieved by providing a conductive elastomer 2 between a moveable, metallic, spring-type contact 4 and a stationary member ~6.

The force-displacement characteristic of the keyswitch is substantially linear until the metallic, spring-type contact 4 meets the elastomer 2 with the force required to produce additional displacement, increasing greatly when the metallic spring- type contact 4 and elastomer 2 move together. The increased force needed to provide displacement of the spring-type switch after it meets the elastomer 2 provides an indication of switch closure free of a hard-stop condition,

Volume 4 Number 2 March/April 1979 185

FIG, 1

FORCE

FIG. 2

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[This page contains 1 picture or other non-text object]