OPTIMIZED PRINTED-CIRCUIT PATTERN FOR MINIATURIZED TRIPLE-POLE SWITCH CONTACT
Original Publication Date: 1993-Oct-01
Included in the Prior Art Database: 2002-Feb-15
The purpose of this invention is to provide an improved printed-circuit ("PC") contact pattern which ensures reliable operation of a triple-pole switch. For proper operation of such a switch in a keyboard application, the drive, sense, and ground lines must be shorted together simultaneously by the actuator. A PC pattern which improves the prob- ability of this occuring offers improved reliability over other patterns. Some factors which atfect switch reliability are noted in Table I.