Electrical monitoring system
US5422626A · kind A · utility
Inventor
Key dates
| Filing date | Nov 19, 1992 |
| Grant date | Jun 6, 1995 |
| Priority date | — |
| Expiry date | Nov 19, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B29/02
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A system for monitoring a location for the occurrence of a predetermined condition thereat includes a transmitter located at the monitored location for normally transmitting a series of first electrical signals at a first repetition rate and in a first time slot; a sensor at the monitored location for sensing the predetermined condition; and a control circuit effective, upon sensing the predetermined condition, to interrupt the transmission of the first electrical signals and to initiate the transmission of a series of second electrical signals at a second repetition rate and in a second time slot both having a predetermined relation to the first repetition rate and the first time slot of said first electrical signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.