Typewriting machines – Key-board or key lever-actuating mechanism – Key-cap or key-stem structure
Patent
1992-02-19
1993-10-19
Burr, Edgar S.
Typewriting machines
Key-board or key lever-actuating mechanism
Key-cap or key-stem structure
400490, 400719, 379110, B41J 508
Patent
active
052539407
ABSTRACT:
Enhancements to computer keyboards and calculator devices are provided that permit a user to select the function and labelling of said device's numeric keypad to conform to either the 123 layout or the 789 layout. The enhancements comprising labelling means for selectively labelling the numeric keypad keys as either a 123 layout or as a 789 layout; switching means for changing the signal associated with each key independent of the application; and circuit board means for transmitting the signals associated with either layout.
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IBM Technical Disclosure Bulletin, vol. 30, No. 1, Jun. 87 "Compact Keyboard Based on G Layout".
Burr Edgar S.
Nguyen Anthony H.
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