H - Electricity – 03 – M
Patent
H - Electricity
03
M
340/187
H03M 11/00 (2006.01) H01H 13/702 (2006.01)
Patent
CA 1240763
Abstract of the Invention An encoding keyboard construction comprising a common input lead, a plurality N of output leads, and a plurality Y of key locations, each of which key locations has associated therewith aligned first and second contact sites defining a contact site pair, which contact sites are biased apart but can be moved into engagement with one another to establish contact therebetween. Each contact site pair includes three electrodes, one of which electrodes is connected to the common input lead, and each contact site includes at most two electrodes, each of which electrodes is connected to a respective single output lead. The output leads are each respectively connected to one or more selected contact sites such that, for each actuation of a key location, contact is effected between the contact sites of the contact site pair associated with such key location, which contact effects application of the signal present on the common input lead to a distinct pair of output leads, thereby effecting production of a distinct 2-of-N multi-bit output signal representative of such key location.
496585
Coin Acceptors Inc.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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