Multiple keyboard switch

Details Multiple keyboard switch Multiple keyboard switch

1988-11-17

1990-10-23

Brier, Jeffery A.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340711, G09G 500

Patent

active

049655604

ABSTRACT:
A switch module for coupling a plurality of keyboards to an AT-type personal computer includes a plurality of inputs. An input is associated with each of the keyboards. The plurality of inputs is selectively switched to a set of output lines which are coupled to the keyboard input of the AT-type computer. A plurality of displays is provided, driven from a common display output of the AT-type computer. The switch module includes one or more electrically operable relays.

REFERENCES:
patent: 4064560 (1977-12-01), Baxter
patent: 4371871 (1983-02-01), Adams
patent: 4651299 (1987-03-01), Miyazaki et al.

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