Portable personal electronic perimeter alarm
US4998093A · kind A · utility
Inventor
Key dates
| Filing date | Dec 16, 1988 |
| Grant date | Mar 5, 1991 |
| Priority date | — |
| Expiry date | Dec 16, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B13/183
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An extremely reliable, easily portable perimeter alarm system. It is comprised of a light beam controlled radio transmitter and personal warning devices capable of individually warning preoccupied highway workers of the imminent danger present when an errant vehicle violates the established perimeter of a work site. This warning will allow the workers to take evasive action and potentially avoid injury and/or death. It is also the object of this invention to allow for an extremely reliable, easily portable perimeter penetration alarm system that can be utilized in other appropriate settings by security guards, military personnel, etc., and which would provide for confidential notification to such personnel that a temporarily established portable perimeter line had been violated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.