Communications: electrical – Digital comparator systems
Patent
1973-12-05
1976-01-13
Shaw, Gareth D.
Communications: electrical
Digital comparator systems
3401725, 340365E, G06F 302, B41J 522
Patent
active
039328384
ABSTRACT:
The potential errors introduced by contact bounce are eliminated by a system which accepts applied key data. The system will accept key data provided first, that it is a proper logic code; second, that the system is in a state to accept new data; and, finally, that it is either different than the previous acceptable logic code or that it is preceded by a no key period measurably exceeding the contact bounce time and shorter than the normal human response time of the typist.
REFERENCES:
patent: 3292764 (1966-12-01), Midgette et al.
patent: 3308429 (1967-03-01), MacWilliams
patent: 3308918 (1967-03-01), James
patent: 3470539 (1969-09-01), Proud, Jr. et al.
patent: 3623016 (1971-11-01), Winkler
patent: 3750160 (1973-07-01), Elzinga
patent: 3753007 (1973-08-01), Viswanathan
IBM Tech. Disclosure Bulletin, Keyboard Circuit by L. G. Lankford, Vol. 9, No. 6, Nov. 1966, pp. 586-587.
IBM Tech. Disclosure Bulletin "Keyboard Scanning" by Beavsoleil et al. Vol. 9, No. 5, Oct. 1966 pp. 532-533.
IBM Tech. Disclosure Bulletin "Typewriter with Electronic Separation of Input" by Becker, Vol. 8, No. 11, Apr. 1966 pp. 1502-1504.
General Electric Company
Shaw Gareth D.
Woods Paul R.
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