Chord entry keying of data fields

Details Chord entry keying of data fields Chord entry keying of data fields

1981-12-14

1987-07-14

Crosland, Donnie L.

Communications: electrical

Audible indication

Percussion-type sound producer

340365E, 340365S, 4004791, 400485, H04Q 400, G06F 302

Patent

active

046805729

ABSTRACT:
A keyboard system for chord entry keying of alphanumeric data fields includes decoding logic permitting substantially or near-simultaneous depression of numeric or alpha data keys and entry or function keys. The logic provides a decoding algorithm for resolving simultaneous entries by utilizing one or another rule of time of key depression. Depression of a numeric or alpha key within 60 milliseconds of an entry key is permitted for decoding of the data as the last key of the current data field. In a time frame between 60 and 100 milliseconds, a warning tone is received for purposes of verifying the last data field entry and to allow the operator to monitor timing performance.

REFERENCES:
patent: 3683370 (1972-08-01), Nagono et al.
patent: 3761918 (1973-09-01), Hatano et al.

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