Monitoring alarm system
US4091384A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 17, 1976 |
| Grant date | May 23, 1978 |
| Priority date | — |
| Expiry date | Aug 17, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B19/00
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An alarm system, including a first station at a site to be monitored, and a second station at a site for monitoring the first station, and phone lines inter-connecting the first and second stations. First and second alarm control assemblies are provided in the first station responsive to different alarm initiating conditions. A first indicator in the second station indicates a first alarm condition by a first mode of operation thereof, and indicates a second alarm condition by a second mode of operation thereof. A second indicating means in the second station indicates a third alarm condition by a mode of operation thereof. First circuitry connected to the phone lines effects energization of the second-indicating means should the voltage of the phone lines be lost, and second circuitry connected to the phone lines effects operation of the first indicator in the first mode thereof in response to actuation of the first alarm control assembly and effects operation of the first indicator in the second mode thereof, in response to actuation of the second alarm control system. A switch in the second station is utilized for resetting portions of the second circuitry which effect operation…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.