Keyboard

Details Keyboard Keyboard

1984-10-15

1985-12-24

Scott, J. R.

Electricity: circuit makers and breakers

Multiple circuit control

Multiple switch

200159B, 200293, 235145R, 400488, H01H 900, H01H 1370

Patent

active

045608458

ABSTRACT:
A keyboard having multiple key-switches each comprising a key having a finger-pressed top face, a movable electrode and at least two stationary electrodes. The keyboard comprises a key holder plate of generally planar flat shape supporting the multiple keys in plural rows movably in a direction perpendicular to a plane of the key holder plate, and retaining device for holding the key holder plate downwardly convexed in cross section across the plural rows of keys, with elastic deformation of the key holder plate. The key holder plate has a deformation-facilitating portion located between each pair of rows of keys, and having a longitudinal recess array formed in parallel to the rows of keys, having a plural number of recesses in the upper and lower surfaces of the key holder plate, as viewed in a direction perpendicular to the rows of keys.

REFERENCES:
patent: Re30435 (1980-11-01), Fukao
patent: 3311210 (1967-03-01), Peroni
patent: 4271333 (1981-06-01), Adams et al.
patent: 4294555 (1981-10-01), Galaske et al.
patent: 4363942 (1982-12-01), Deeg et al.
patent: 4423464 (1983-12-01), Tamura et al.
patent: 4440515 (1984-04-01), Nassimbene
patent: 4467150 (1984-08-01), Leitermann et al.

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