Push button to rotary dial converter systems

Details Push button to rotary dial converter systems Push button to rotary dial converter systems

1977-10-17

1979-09-11

Claffy, Kathleen H.

179 84R, H04M 144

Patent

active

041676556

ABSTRACT:
A push button to rotary dial converter system for converting push button telephones to provide rotary dial type pulsed outputs. The system provided is universal and can be used with almost any subscriber set that is made to provide push button signals to the telephone system and is especially useful when the telephone system involved is not equipped to receive variable frequency dialing signals. Responsive to the operation of the selected push buttons, pulses are transmitted through the line. The system is unique, among other ways, in that the connection to the network is electronically opened during out pulsing and a parallel power supply arrangement is employed; and it is applicable even when only one pair of hook switche contacts are available, and one side of the pair of hook switch contacts are tied together. The system further includes a bridge circuit for maintaining the polarity on the subscriber set independent of telephone line polarity reversals, a portion of the bridge circuit also being used to prevent operation of the subscriber set ringer in response to the rotary dial type pulses.

REFERENCES:
patent: 3856982 (1974-12-01), Lawson et al.
patent: 3896270 (1975-07-01), Kopec et al.
patent: 3932707 (1976-01-01), Connolly et al.
patent: 3956596 (1976-05-01), Connolly et al.
patent: 3973084 (1976-08-01), Hovland
patent: 3980837 (1976-09-01), Jakobsson
patent: 4008380 (1977-02-01), La Borde
patent: 4046971 (1977-09-01), Losehand
patent: 4081619 (1978-03-01), Losehand

Affiliated with

Also associated with

Rating

Push button to rotary dial converter systems does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Push button to rotary dial converter systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Push button to rotary dial converter systems will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-478842