Communications: electrical – Audible indication – Percussion-type sound producer
Patent
1986-04-25
1987-09-15
Rowland, James L.
Communications: electrical
Audible indication
Percussion-type sound producer
340365E, 340365S, 400100, 364709, G06F 302, G08C 900
Patent
active
046942807
ABSTRACT:
A keyboard entry system is disclosed which comprises a keyboard which includes a plurality of letter keys, one for each letter of a selected language. The entry system responds to conventional sequential activation of individual keys by providing output signals indicative of the respective individual letters associated with the activated keys to an application program such as a word processor or printer control program. The keyboard entry system also responds to chords of simultaneously activated multiple keys by using these chords to retrieve stored words from a dictionary. It is the stored words rather than the entered chords which are applied as inputs to the application program. This system allows an operator to use both conventional sequential key entry techniques and chorded entry techniques for rapid data entry. Chords are detected by comparing a stored constant with the elapsed time between a key release and the immediately preceding key depression of an overlapping key. The overlapping keys are characterized as a chord when the elapsed time is greater than the stored constant. A biofeedback mechanism alerts the operator of inadvertent chords.
REFERENCES:
patent: 3225883 (1965-12-01), Ayres
patent: 3381270 (1968-04-01), James
patent: 3597538 (1971-08-01), Birenbaum
patent: 3892915 (1975-07-01), Budworth et al.
patent: 4042777 (1977-08-01), Bequaert et al.
patent: 4344069 (1982-08-01), Prame
patent: 4360892 (1982-11-01), Endfield
patent: 4381502 (1983-04-01), Prame
patent: 4502038 (1985-02-01), Lowenthal et al.
Endo Yukio
Rollhaus Philip E.
Quixote Corporation
Rittmaster T.
Rowland James L.
LandOfFree
Keyboard entry system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Keyboard entry system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Keyboard entry system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1388406