Integrated alarm, security, building management, and communications system
US4375637A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 24, 1981 |
| Grant date | Mar 1, 1983 |
| Priority date | — |
| Expiry date | Feb 24, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B26/006
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A fully integrated alarm, communication, and building management system has a central control station and a plurality of remotely located sensing and controlling devices. Each remote device has an individual digital address, which is a parallel address present on a plurality of parallel lines. The parallel address is converted to a serial address and sent to the various remote locations where it is then reconverted to a parallel address and decoded to determine the specific device being interrogated. A multiple amplifier system is provided at the central control unit and provides communication capability involving remotely located loudspeakers and microphones. The amplifiers are provided in a dual channel arrangement so as to provide a fail-safe arrangement and a failure detector is located in each channel such that if a selected amplifier channel fails, the back-up or redundant channel is immediately switched into use. A number of controlling devices or actuating devices may be employed which operate in conjunction with the sensing devices and a programmable read only memory, or a programmable multiplexer, located at the central control unit. Each remotely located controlling or a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.