Typewriting machines – Key-board or key lever-actuating mechanism – Key-board arranged according to character location
Reexamination Certificate
2006-11-21
2006-11-21
Colilla, Daniel J. (Department: 2854)
Typewriting machines
Key-board or key lever-actuating mechanism
Key-board arranged according to character location
C400S485000, C400S489000
Reexamination Certificate
active
07137749
ABSTRACT:
A keyboard for computers and data entry devices is disclosed, which increases typing speed, but at the same time eases the transition from the Standard Qwerty keyboard for experienced typists. Two letter sequences called digraphs are typed rapidly when struck by opposite hands. The proposed keyboard places frequently used digraphs on opposite hands and avoids the use of small fingers to increase typing speed. The home row is not emphasized and only three high frequency letters are moved relative to Qwerty positions, making the keyboard easy to learn. The constraints of maximal speed and minimal modification are satisfied concurrently. A second key is dedicated to the letter “E”, the most frequently used letter in the English language, to further enhance typing speed and ease of transition from Qwerty. The result is a faster and highly practical electronic keyboard.
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Colilla Daniel J.
Ghatt Dave A.
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