Electronic audio signalling device for telephones

Details Electronic audio signalling device for telephones Electronic audio signalling device for telephones

1981-06-22

1983-09-27

Popek, Joseph A.

H04M 100

Patent

active

RE0313980

ABSTRACT:
A signalling device to be substituted for the usual electromechanical ringer of a telephone, either as a replacement for that ringer in existing telephone instruments or as a part of the original manufactured instrument. It includes solid-state circuitry for eliminating noise pulses and an electronic oscillator circuit which will operate effectively on a minimum current supply along with a mechanical arrangement of components to obtain a compact unit with a folded horn or Helmholtz resonator type acoustical loading system and adjustable volume control.

REFERENCES:
patent: 1884724 (1932-10-01), Keller
patent: 2808463 (1957-10-01), Jenkins
patent: 3826333 (1974-07-01), Buckwalter
patent: 3860838 (1975-01-01), Kumon
patent: 3867585 (1975-02-01), Morstadt
patent: 3965307 (1976-06-01), Dimmer
patent: 4157459 (1979-06-01), Bush et al.

Affiliated with

Also associated with

Rating

Electronic audio signalling device for telephones does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electronic audio signalling device for telephones, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electronic audio signalling device for telephones will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2123786