Method to detect penetration of a surface and apparatus implemen

Details Method to detect penetration of a surface and apparatus implemen Method to detect penetration of a surface and apparatus implemen

1993-05-20

1996-10-22

Mullen, Thomas

Communications: electrical

Condition responsive indicating system

Specific condition

109 29, 109 42, G08B 1300

Patent

active

055681247

ABSTRACT:
Apparatus and method for detecting unauthorized disturbance of a protected surface, includes a substrate adapted to conformably encase and adhere to the surface that is to be protected. A plurality of layers, each comprising a plurality of frangible conduits is embedded in the substrate and randomly overlays a majority of the protected surface. Each of the conduits has its ends protruding from the substrate to permit a monitor to be coupled thereto for monitoring the integrity of the continuity of each conduits, and for switching from a first state to a second state whenever the continuity of any of the conduits is broken. A warning alarm is coupled to the monitor for displaying the state of the monitor.

REFERENCES:
patent: 3594770 (1971-07-01), Ham et al.
patent: 3763795 (1973-10-01), Wetz, Jr.
patent: 4367460 (1983-01-01), Hodara
patent: 4791410 (1988-12-01), Larsson
patent: 4922228 (1990-05-01), Jacobson
patent: 4972175 (1990-11-01), MacPherson
patent: 5258741 (1993-11-01), Fuller

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