Communications: electrical – Audible indication – Percussion-type sound producer
Patent
1975-11-24
1977-05-17
Habecker, Thomas B.
Communications: electrical
Audible indication
Percussion-type sound producer
340365E, G08C 100
Patent
active
040245349
ABSTRACT:
A keyboard encoding system having a pause built into the repeat key function. A multi-stage counter has a first of its stages coupled to a first bistable switching device and another, higher order stage coupled to a second bistable switching device. When a repeat key is closed, the counter is incremented past the first stage to the higher order stage which renders the second bistable switching device conductive and, due to the interconnection between the switching devices, primes the first bistable switching device. When the counter again increments to the first stage, the first bistable switching device conducts to produce, after the pause provided by the system, a repeat key encoding signal.
REFERENCES:
patent: 3675239 (1972-07-01), Ackerman
patent: 3792466 (1974-02-01), Arnold
patent: 3886543 (1975-05-01), Marin
patent: 3892915 (1975-07-01), Budworth
patent: 3918051 (1975-11-01), Bernin
patent: 3932838 (1976-01-01), Sitter
Anderson T. J.
Colitz M. J.
Habecker Thomas B.
Xerox Corporation
Zalman Leonard
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