Method to detect penetration of a surface and apparatus implementing same
US5568124A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 20, 1993 |
| Grant date | Oct 22, 1996 |
| Priority date | — |
| Expiry date | May 20, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B13/126
- WIPO fieldControl
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.