Touch checking key tops for keyboard

Details Touch checking key tops for keyboard Touch checking key tops for keyboard

1977-11-25

1979-12-25

Wright, Jr., Ernest T.

Typewriting machines

Key-board or key lever-actuating mechanism

Key-cap or key-stem structure

400483, 400494, 235145R, B41J 508

Patent

active

041803361

ABSTRACT:
Touch checking key tops for keyboard on a cash register in which the keyboard is provided with a plurality of keys arranged in a generally rectangular matrix with the keys being arranged in three rows extending in one direction and three rows extending in a direction at substantially right angles to the other three rows. The keys are assigned the digits 1 through 9 with four of the keys being disposed on the corners of the matrix. The keys have key tops. The key tops for the four keys on the four corners of the rectangular matrix have diagonally disposed ridges formed thereon which serve as tactile indicia to the operator using the keyboard to improve the operator's confidence and productivity and to minimize operator errors.

REFERENCES:
patent: 1718694 (1929-06-01), Kurowski
patent: 3396827 (1968-08-01), Harwell
patent: 3860771 (1975-01-01), Lynn et al.

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