Single-wire loop alarm system

Details Single-wire loop alarm system Single-wire loop alarm system

1986-03-11

1988-06-14

Crosland, Donnie L.

Communications: electrical

Condition responsive indicating system

With particular system function

340505, 340506, 340508, 340511, 340525, 340534, 340537, 34082507, G08B 2500, G08B 2600

Patent

active

047514981

ABSTRACT:
A single-wire loop alarm system in which an identification module is placed across each alarm switch. Any module which is across an open switch is powered by the loop current and, in response to a pulse count in the loop representing its address, changes the loop impedance in order to report on its status. The loop current may alternate in direction so that oppositely poled modules may be used, thus allowing a larger number of powered modules to accommodated at the same time.

REFERENCES:
patent: 4067008 (1978-01-01), Sprowls, III
patent: 4228424 (1980-10-01), LeNay et al.
patent: 4491828 (1985-01-01), Galvin et al.
patent: 4536748 (1985-08-01), Tonello
patent: 4612534 (1986-09-01), Buehler et al.
patent: 4613848 (1986-09-01), Watkins

Affiliated with

Also associated with

Rating

Single-wire loop alarm system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Single-wire loop alarm system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Single-wire loop alarm system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-507327