Keyboard

Details Keyboard Keyboard

1988-08-02

1989-05-16

Scott, J. R.

Electricity: circuit makers and breakers

Multiple circuit control

Multiple switch

235145R, 273153S, 341 22, 340706, 200512, H01H 1370, A63F 906

Patent

active

048312193

ABSTRACT:
A keyboard including a plurality of key switches and a plurality of keys mounted slidably on the keyboard over the key switches, each key overlying one of the key switches and the top of each key provided with a marking, upon each key being depressed into engagement with the underlying key switch, the key switch being operated to provide an indication of the marking provided on the top of the depressed key, and the number of plurality of keys being less in number by one than that of the key switches to provide a vacant key space on the keyboard to allow the keys to slide freely two-dimensionally over the key switches and through the vacent key space to permit each key to be slid over and overlie each of the key switches in a pattern as desired.

REFERENCES:
patent: 3699294 (1972-10-01), Sudduth
patent: 3860771 (1975-01-01), Lynn et al.
patent: 4127740 (1978-11-01), LaMarche
patent: 4408103 (1983-10-01), Smith, III
patent: 4580018 (1986-04-01), Yoshihara
patent: 4659879 (1987-04-01), Hasegawa
patent: 4720609 (1988-01-01), Hochgesang et al.

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