Key-operated arrangement for producing code characters

Details Key-operated arrangement for producing code characters Key-operated arrangement for producing code characters

1977-09-16

1980-12-23

Caldwell, Sr., John W.

Communications: electrical

Audible indication

Percussion-type sound producer

178 17C, 340365E, G06F 302

Patent

active

042413338

ABSTRACT:
A key-operated arrangement for teleprinters as a keyboard for encoding characters and data arranged in matrix fashion in rows and columns. Along with the keyboard an addressable fixed-value store is provided. A scanning device periodically scans the keyboard and fixed-value store and produces a coded character from the store when a signal is present which is provided by operation of a contact on the keyboard. At least one additional matrix column is arranged on the keyboard for special functions. A mode register connected via a column selector to the additional matrix column stores signals arriving from the scanning device and converts them into control signals which appear in parallel at outputs of the mode register.

REFERENCES:
patent: 3645441 (1972-02-01), De Sandre
patent: 3760409 (1973-09-01), Ruben et al.
patent: 3786497 (1974-01-01), Davis et al.
patent: 3834616 (1974-09-01), Washizuka et al.
patent: 3886539 (1975-05-01), Gould
patent: 3911424 (1975-10-01), Giannuzzi et al.
patent: 4124843 (1978-11-01), Bramson et al.
"The Integrated Circuit Catalog", Texas Instruments, Dec. 1971, pp. 9-72 to 9-79.

Affiliated with

Also associated with

Rating

Key-operated arrangement for producing code characters does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Key-operated arrangement for producing code characters, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Key-operated arrangement for producing code characters will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2245414