Keyboard

Details Keyboard Keyboard

1976-08-03

1977-11-22

Scott, James R.

Electricity: circuit makers and breakers

Multiple circuit control

Multiple switch

200159A, 200275, 200302, H01H 1370

Patent

active

040597377

ABSTRACT:
This invention relates to a keyboard comprising a support member, first and second sets of spaced-apart parallel conducting strips and a plurality of keys. The upper surface of the support has recesses formed therein arranged in a matrix, there being an aperture in each recess extending to the lower surface of the support. A key is adapted to fit in each recess and has a portion extending through the aperture therein. The lower surface is formed with recesses to receive the first and second sets of conducting strips which are arranged generally perpendicular to each other. Strips in the first set intersect with those in the second set, each point of intersection being generally beneath and to one side of a key. The strips of the first set are fixed in the support lower recesses. The second set of conducting strips are formed in a manner beneath each key to hold the key in its upper position when the key is at rest, and to engage a strip of the first set in a wiping action when a key is depressed. A flexible plastic material covers the upper surface of the support to hold the keys within the upper surface recesses.

REFERENCES:
patent: 3786205 (1974-01-01), Lier
patent: 3819882 (1974-06-01), Anderson et al.
patent: 3978297 (1976-08-01), Lynn et al.
Harris, R. H.; IBM Tech. Disc. Bull.; "Positive Action Keyboard," vol. 16, No. 11; 4-1974, pp. 3714, 3715.

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