Keyboard arrangements

Details Keyboard arrangements Keyboard arrangements

1985-11-06

1987-06-23

Caldwell, Sr., John W.

Communications: electrical

Audible indication

Percussion-type sound producer

340365R, 379 95, 379369, G06F 302

Patent

active

046756531

ABSTRACT:
A keyboard arrangement for computer equipment in which the full set of keys is utilized for computing functions has a restricted set of the full set of keys used for operating a telephony function. The equipment is normally mainspowered, but in the event of mains failure, only the restricted set of keys is scanned by means envisaged from standby battery power, thereby reducing the power required from the battery.

REFERENCES:
patent: 2880372 (1959-03-01), Greppin
patent: 4408511 (1983-10-01), Deforeit
patent: 4438431 (1984-03-01), Toyomura
patent: 4591833 (1986-05-01), Ishii et al.

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