Key-holding structure of keyboard with curved operating surface

Details Key-holding structure of keyboard with curved operating surface Key-holding structure of keyboard with curved operating surface

1984-04-10

1985-07-09

Scott, J. R.

Electricity: circuit makers and breakers

Multiple circuit control

Multiple switch

200159B, 361398, 361288, 4004791, 400488, H01H 900, H01H 1370

Patent

active

045284288

ABSTRACT:
A keyboard assembly having key-switches, comprising a key holder plate supporting multiple keys in plural rows and movably across the thickness of the plate, and further comprising an upper casing which has a rectangular aperture closed by the key holder plate. The key holder plate has holes through which the keys extend, and integral guide portions concentric with the holes and extend toward the rectangular aperture. Opposite right and left sides of the aperture perpendicular to the rows of the keys are defined by side walls of the upper casing each of which has a downward extension toward the key holder plate. The extension has a convex lower end profile with which the key holder plate is held in pressed contact by fasteners, with elastic deformation thereof following the convex lower end profile of the downward extension, such that a surface generally defined by top faces of the keys is curved in cross section across the rows of the keys.

REFERENCES:
patent: 4294555 (1981-10-01), Galaske et al.
patent: 4363942 (1982-12-01), Deeg et al.
patent: 4440515 (1984-04-01), Nassimbene
patent: 4467150 (1984-08-01), Leitermann et al.
Akers, A. L., et al.; IBM Technical Disclosure Bulletin; "Electronic Keyboard", vol. 25, No. 11B, Apr. 1983, pp. 6219, 6220.

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