Smoke detector with digital display
US5565852A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 13, 1994 |
| Grant date | Oct 15, 1996 |
| Priority date | — |
| Expiry date | Jul 13, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B25/014
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An improved environmental alarm system has centralized control of local sensor display capabilities displays, on the sensor itself, a variety of sensor data including sensor address, and detected levels of one or more environmental conditions. Alphanumeric characters are displayed at individual sensors in response to commands from a master microprocessor directing local sensor display content and timing. A local microcontroller within each sensor interprets the detected signal and prepares a resulting data signal that is available for downloading into the alphanumeric display in compliance with a coded message from the master microprocessor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.