Electronic tone ringer

Details Electronic tone ringer Electronic tone ringer

1974-05-28

1976-06-22

Claffy, Kathleen H.

H04M 100

Patent

active

039653072

ABSTRACT:
An electronic tone ringer for use in telephone subsets. Operating in response to and powered from incoming received ringing signals, the ringer circuitry provides audible multitone signals. The circuitry employed eliminates so-called "bell tapping" or "chirping" during dialing.

REFERENCES:
patent: 3165591 (1965-01-01), Flowers
patent: 3218395 (1965-11-01), Suda
patent: 3609579 (1971-09-01), Chappell
patent: 3808379 (1974-04-01), Lind
patent: 3867585 (1975-02-01), Morstadt

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