Electronic tone ringer

Details Electronic tone ringer Electronic tone ringer

Filed on

1980-04-15

Date issued

1982-01-05

Examiner

Konick, Bernard

Other Related Categories

H04M 100

Type

Patent

Status

active

Patent number

043095747

Description

ABSTRACT:
An electronic tone ringer for use in telephone substations. This circuit operates in response to conventional ringing signals and generates a single tone alert signal interrupted at a low frequency. The audible tone alert signal is generated by a piezo-ceramic transducer.

REFERENCES:
patent: 3965307 (1976-06-01), Dimmer
patent: 4214131 (1980-07-01), Bush et al.

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