Electronic apparatus

Details Electronic apparatus Electronic apparatus

1983-04-11

1984-04-24

Pitts, Harold I.

Registers

Record controlled calculators

Key operators

235379, G06C 960

Patent

active

044450273

ABSTRACT:
An electronic apparatus is disclosed which comprises numeral input keys, plural unit input keys, a device for judging whether a combination of actuations of the numeral input keys and the unit input keys has a meaning as a figure, a device of forbidding the entry of the key signals of said combination in case said combination does not represent a meaning as a figure, and a device for generating an alarm signal simultaneously with the forbidding of said key signal entry.

REFERENCES:
patent: 3483553 (1969-12-01), Blankenbaker
patent: 4126949 (1978-11-01), Simone

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