Disaster alert system
US4155042A · kind A · utility
Inventors
Key dates
| Filing date | Oct 31, 1977 |
| Grant date | May 15, 1979 |
| Priority date | — |
| Expiry date | Oct 31, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B27/00
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A disaster alert system is disclosed which consists of two major sub-systems. The first sub-system is a central disaster alert station which transmits coded R.F. activation signals specifying the geographic area and/or the official personnel to be alerted. Said central disaster alert station also transmits audio signals containing the disaster warning message to be disseminated to potential disaster victims and/or pre-selected official personnel. The second and companion sub-system consists of a plurality of independent and remotely located disaster alert modules which can be placed in any location to which disaster alert information is to be disseminated. Said disaster alert modules operate on continuous low-power standby, receiving and analyzing R.F. signals of a pre-determined carrier frequency and bandwidth. In the absence of said coded activation signal, said disaster alert modules remain in low-power standby. Detection and decoding of said coded activation signals results in activation of the module main power circuits. Activation of main power circuits results in a plurality of module outputs, including but not limited to, production of a clearly audible alarm signal, displa…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.