Typewriting machines – Key-board or key lever-actuating mechanism – Key-board arranged according to character location
Patent
1978-03-13
1980-07-08
Sewell, Paul T.
Typewriting machines
Key-board or key lever-actuating mechanism
Key-board arranged according to character location
400479, B41J 510
Patent
active
042114977
ABSTRACT:
This disclosure relates to data input system keyboards that are designed in accordance with human engineering principles for use in conjunction with a specific data input activity. Each keyboard has a plurality of keys adapted for actuation in response to minimum movement of the fingers of an operator and each having a substantially smooth upper surface to facilitate sliding movement of the fingers of the operator between the keys of the keyboard. The keys of each keyboard are arranged such that the most often used keys are situated in the most readily accessible locations with respect to the fingers of the operator, and with keys which are frequently utilized in sequence. That is, the keys that comprise digraphs & trigrams as well as keys carrying individual words or characters used frequently in sequence are positioned adjacent one another. The keys may be arranged along arcuate paths corresponding to the natural movement of the fingers, hands, and arms of the operator.
REFERENCES:
patent: 2040248 (1936-05-01), Dvorak et al.
patent: 3600528 (1971-08-01), Leposavic
patent: 3847263 (1974-11-01), X
patent: 3929216 (1975-12-01), Einbinder
IBM Tech. Disc. Bulletin, P. E. Stuckert, "Input Keyboard," vol. 14, No. 3, Aug. 1971, pp. 952-959.
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