Composite type crime preventive sensor

Details Composite type crime preventive sensor Composite type crime preventive sensor

1989-03-31

1990-07-17

Orsino, Joseph A.

Communications: electrical

Condition responsive indicating system

With particular system function

340541, 340567, G08B 1300

Patent

active

049423843

ABSTRACT:
A composite type crime preventive sensor processes output detection signals from a plurality of sensor units of mutually different detection systems for ranking the signals into a plurality of grades depending on signal level, and provides an intruder detection signal when a sum of ranked level values is above a preset reference value, whereby any risk of alarm failing and erroneous alarming can be effectively minimized.

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patent: 4103293 (1978-07-01), La Forge, Jr.
patent: 4401976 (1983-08-01), Stadelmayr
patent: 4630246 (1986-12-01), Fogler
patent: 4660024 (1987-04-01), McMaster
patent: 4710750 (1987-12-01), Johnson
patent: 4728935 (1988-03-01), Pantus et al.
patent: 4857912 (1989-08-01), Everett, Jr. et al.

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