Alarm system backup with cut line detector

Telephonic communications – Emergency or alarm communications

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

379 33, 379 51, H04M 1104

Patent

active

057373914

ABSTRACT:
A security system backup device which provides a system that recognizes when an outdoor telephone line near the building has been severed and provides a means by which a distress message can be sent over the operable part of the outdoor telephone lines. The system utilizes a signal generator connected to a phone line inside of the building and a signal detector connected to the outdoor phone line outside of the building in a discreet and hard to reach location. When the signal no longer appears on the line, a telephonic calling unit, which is located with the signal detector, places a distress call.

REFERENCES:
patent: 4148020 (1979-04-01), Siemer et al.
patent: 4262283 (1981-04-01), Chamberlain et al.
patent: 4278841 (1981-07-01), Regennitter et al.
patent: 4361730 (1982-11-01), Barber et al.
patent: 4390750 (1983-06-01), Bartelink
patent: 4465904 (1984-08-01), Gottsegen et al.
patent: 4654640 (1987-03-01), Carll et al.
patent: 4718079 (1988-01-01), Rabito
patent: 4731810 (1988-03-01), Watkins
patent: 4737776 (1988-04-01), Wireman
patent: 4825457 (1989-04-01), Lebowitz
patent: 4868859 (1989-09-01), Sheffer
patent: 4887290 (1989-12-01), Dop et al.
patent: 5185779 (1993-02-01), Dop et al.
patent: 5195126 (1993-03-01), Carrier et al.
patent: 5233640 (1993-08-01), Kostusiak

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Alarm system backup with cut line detector does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Alarm system backup with cut line detector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Alarm system backup with cut line detector will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-20849

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.