Telephone calculator

Details Telephone calculator Telephone calculator

1974-01-09

1976-11-30

Claffy, Kathleen H.

Registers

Coded record sensors

Particular sensor structure

179 2DP, 235156, H04M 150

Patent

active

039951235

ABSTRACT:
Apparatus and method for providing a standard telephone with localized calculating and read-out capabilities. Miniaturized electronic calculator circuits are integrally mounted within a standard telephone chassis and operatively share use of the telephone keyboard selector buttons with the existing telephone circuits. Input stimuli applied to the push-button selector keys are simultaneously converted into touch-tone dialing information for the telephone circuits and into digital information for the calculator circuits. A plurality of calculator function input keys supplement the shared standard telephone keyboard and provide function information input capability to the calculator circuits. Easily operated switches enable either independent or simultaneous use of the telephone and/or the calculator circuits. A numerical display panel mounted on the face of the telephone chassis provides visual read-out capability for the calculator and for entered telephone numbers.

REFERENCES:
patent: 3725907 (1973-04-01), Boulanger
patent: 3760121 (1973-09-01), Nissim
patent: 3829783 (1974-08-01), Groenendaal et al.

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