Membrane keyboard apparatus with tactile feedback

Details Membrane keyboard apparatus with tactile feedback Membrane keyboard apparatus with tactile feedback

1978-06-12

1980-03-18

Scott, James R.

Electricity: circuit makers and breakers

Multiple circuit control

Multiple switch

200159B, H01H 1370

Patent

active

041940970

ABSTRACT:
There is disclosed a membrane-type keyboard comprising a support member, a pair of spaced-apart sheets of flexible insulating material having designated key portions positioned adjacent to and spaced from said support member and a pair of electrical conductors each attached to adjacent inner surfaces of said key portions. The depression of a key portion of the top sheet forces the adjacent electrical conductors into contact. Further depression of the key portion of the top sheet moves both electrical conductors and the key portions of the spaced-apart sheets a distance sufficient to provide a positive degree of tactile feedback to the operator.

REFERENCES:
patent: 3120584 (1964-02-01), Grunfelder et al.
patent: 3383487 (1968-05-01), Wiener
patent: 3617666 (1971-11-01), Brave
patent: 3860771 (1975-01-01), Lynn et al.
patent: 3988551 (1976-10-01), Larson
patent: 4046975 (1977-09-01), Seeger, Jr.
Johnson, D. O., Jr.; IBM Tech. Disc. Bull., "Keyboard and Wiping Contact Assembly;" Dec. 1970; vol. 13, No. 7; pp. 1962, 1963.

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