Telephone having reiterative dialing feature

Details Telephone having reiterative dialing feature Telephone having reiterative dialing feature

1978-09-20

1980-06-24

Brigance, Gerald

179 90BD, H04M 1272

Patent

active

042096685

ABSTRACT:
A telephone having a dialer for repetitively dialing a desired number at 40 second time intervals. The telephone is initially used in the normal manner, and when the number being called is busy, the user hangs up the telephone and depresses a button to place it in a reiterative dialing mode. Thereafter the telephone, at 40 second intervals, repetitively dials the desired number. Each time a busy signal is detected the telephone disconnects from the line, and dials again 40 seconds later. When a ring signal is detected, indicating the number called is no longer busy, an alarm alerts the user to pick up the receiver. All of the logic and control circuitry involved, except the power supply, is built into the telephone.

REFERENCES:
patent: 3792203 (1974-02-01), Martin
patent: 3868479 (1975-02-01), Schweitzer et al.
patent: 3885108 (1975-05-01), Zock
patent: 3899640 (1975-08-01), Piacente et al.
patent: 4052570 (1977-10-01), Sutton

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