Danger alarm system

Details Danger alarm system Danger alarm system

1979-04-13

1981-08-25

Popek, Joseph A.

H04M 1104

Patent

active

042861179

ABSTRACT:
A danger alarm system has a plurality of alarm circuits which are operable to provide environmental signals concerning the area about the respective alarm circuits. The alarm circuits are connected to a central exchange by way of respective lines which are terminated in the exchange by respective alarm connection circuits. A write-read memory is provided for storing the busy state of the respective lines, and receives the busy state information via an input multiplexer which is connected to a line state multiplexer through a plurality of logic gates. A comparator gates through alarm and line interrupt signals for each line in response to such signals together with busy condition signals from the memory. An output multiplexer connects the comparator to respective output indicator circuits for alarm conditions and line interrupt conditions.

REFERENCES:
patent: 3842208 (1974-10-01), Paraskevakos

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1159620