Alarm loop supervision

Details Alarm loop supervision Alarm loop supervision

1983-03-14

1985-07-16

Crosland, Donnie L.

Communications: electrical

Condition responsive indicating system

With particular system function

340506, 340509, G08B 2900

Patent

active

045299714

ABSTRACT:
Apparatus for indicating a break in the lines leading from a base station to a monitored instrumentality. Two pairs of wires conduct signals to each contact of a normally open switch-like element in the monitored instrumentality (the closure of which signifies an alarm condition) and return these signals to the base station. The presence or absence of the return signals at predetermined times indicates the condition of the lines and also an alarm condition, even if one of the lines leading to the instrumentality is broken.

REFERENCES:
patent: 4253091 (1981-02-01), Frydman
patent: 4361833 (1982-11-01), Allgood
patent: 4378554 (1983-03-01), Saigal

Affiliated with

Also associated with

Rating

Alarm loop supervision 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 loop supervision, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Alarm loop supervision will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1738425