Programmable monitoring system and method
US5438607A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 25, 1992 |
| Grant date | Aug 1, 1995 |
| Priority date | — |
| Expiry date | Nov 25, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M11/04
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A programmable monitoring system for personal use in a home, medical ward, office or other localized area features a radio receiving base unit and one or more low power, radio-frequency battery-powered wireless transmitter units, each capable of transmitting uniquely encoded pulse-encoded serial digital signals at a common high frequency to the base unit. The base unit has a superregenerative receiver and a microcomputer for deciphering and validating the encoded information to ensure that the coded signal originated with a transmitter unit associated with the base unit. The portable transmitters, once activated, send a coded signal to the base unit indicative of a distress or alarm situation or a low battery condition, and which transmitter unit is transmitting. The base unit deciphers the coded signal and automatically contacts a central monitoring station via a telephone link. The base unit sends the serial number of the base unit, and the specific condition requiring attention, i.e., medical, fire, low-battery, etc., to the central monitoring station. A voice message may optionally be generated by the base unit to indicate contact has been made with the monitoring station, and …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.