Multiple sensor intrusion detection system

Details Multiple sensor intrusion detection system Multiple sensor intrusion detection system

1978-05-30

1982-03-23

Caldwell, Sr., John W.

Communications: electrical

Condition responsive indicating system

Specific condition

340521, 340524, 340531, G08B 2500

Patent

active

043215920

ABSTRACT:
A multiple zone intrusion detection system in which a plurality of intrusion sensors can be readily converted into the system without system modification, and in which mode control signals from a central control unit and alarm signals from the sensors are both conveyed on a single conductor of the system cable. Each sensor has an associated interface module which permits coupling of different types of sensors to the system and sharing of a single conductor for mode control signals and alarm signals.

REFERENCES:
patent: 3713142 (1973-01-01), Getchell
patent: 3716834 (1973-02-01), Adams
patent: 3735396 (1973-05-01), Getchell
patent: 3927404 (1975-12-01), Cooper
patent: 4044351 (1977-08-01), Everson
patent: 4093946 (1978-06-01), Fowler
patent: 4101875 (1978-07-01), Humphries
patent: 4117479 (1978-09-01), Galvin et al.

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