Sensor monitoring alarm system

Details Sensor monitoring alarm system Sensor monitoring alarm system

1978-04-06

1980-05-13

Waring, Alvin H.

Communications: electrical

Condition responsive indicating system

With particular coupling link

340521, 340533, G08B 2500

Patent

active

042030960

ABSTRACT:
A time multiplexed sensor monitoring system. A plurality of remote sensor units are connected to a central control unit by a two-wire bus line. Power is supplied to the remote unit sensors by the central control unit. Synchronization of the remote units is provided through momentary interruptions in the power supplied to the remote sensor units. The use of a single two-wire bus line for both application of DC signals to the respective remote sensor units and communication of data from the remote sensor units to the central control unit is facilitated by use of double tone multi-frequency (DTMF) signalling techniques.

REFERENCES:
patent: 2406165 (1946-08-01), Schroeder
patent: 2701748 (1954-04-01), Anderson
patent: 2723309 (1955-11-01), Lair et al.
patent: 3510841 (1970-05-01), Lejon
patent: 3697984 (1972-10-01), Atkinson et al.
patent: 4044351 (1977-08-01), Everson
patent: 4053714 (1977-10-01), Long

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-932107