Momentary digital encoding device for keyboards

Details Momentary digital encoding device for keyboards Momentary digital encoding device for keyboards

1982-07-07

1985-02-19

Scott, J. R.

Electricity: circuit makers and breakers

Multiple circuit control

Multiple switch

200159B, 200264, 340365R, 340365A, H01H 1370, G08C 900

Patent

active

045007578

ABSTRACT:
A keyboard encoding device which directly develops a digital, valid and reliable output signal without electronic encoding circuitry. The preferred device has a plurality of juxtaposed, flexible conductive strands or wires each having a number of axially spaced impact zones which are either insulated or conductive; corresponding zones on the separate wires are aligned to cooperatively define a series of spaced impact zone sets each made of a unique pattern of conductive and insulated zones. An electrically conductive, rubber-like resilient pad having a series of ridge-like elongated members respectively aligned with corresponding impact zone sets is oriented for shifting of the members into momentary contact with the associated zone sets, whereby electrical contact is made between the ridge members and the conductive impact zones of the set. This directly generates a momentary unique, digitalized output signal. The device is particularly suited for use in impact-type keyboards.

REFERENCES:
patent: 3592979 (1971-07-01), Redman
patent: 3696408 (1972-10-01), Bouchard et al.
patent: 3723673 (1973-03-01), Clary et al.
patent: 3725908 (1973-04-01), Brisebarre et al.
patent: 3911780 (1975-10-01), Dyle et al.
patent: 4359613 (1982-11-01), Rooney

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