Thin keyboard with changeable key indicia

Details Thin keyboard with changeable key indicia Thin keyboard with changeable key indicia

1981-01-16

1982-06-22

Groody, James J.

Communications: electrical

Audible indication

Percussion-type sound producer

340712, 400493, G06F 302

Patent

active

043365302

ABSTRACT:
A substantially thin keyboard for use in credit card sized clock calculators or the like includes a rigid plate carrying a plurality of stationary key contacts, a flexible member integral with a plurality of electrically conductive rubber movable contacts and a keyboard surface member, all of which are stacked in the named order. An indicia sheet is interposed between the flexible member and the keyboard surface member, which carries a plurality of groups of key indicia or markings. A slide switch is movably attached so as to shift the key indicia carried on the sheet in relation to the plurality of the stationary key contacts group by group. Masking members are secured on part of the keyboard surface member to conceal all the groups of the key indicia from view other than one group of the key indicia is presented in register with the stationary key contacts.

REFERENCES:
patent: 3200375 (1965-08-01), Lutz
patent: 4078257 (1978-03-01), Bagley
IBM Technical Disclosure Bulletin, Johnson, vol. 13, No. 7, Dec. 1970, pp. 2041-2042.
IBM Technical Disclosure Bulletin, Weber, vol. 6, No. 1, Jun. 1963, p. 39.
IBM Technical Disclosure Bulletin, Cooper et al., vol. 11, No. 5, Oct. 1968, p. 524.

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