Exit guiding system
US4796018A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 22, 1987 |
| Grant date | Jan 3, 1989 |
| Priority date | — |
| Expiry date | May 22, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B17/00
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An exit guiding system comprising detectors of changes in ambient condition due to a fire, a guiding device positioned near each fire exit or exit access, instruction means controlling operation or non-operation of each guiding device based upon signal levels from said detectors, operation of each guiding device being initiated when any detector outputs a signal indicating a dangerous condition, operation of individual guiding devices being suspended when ambient conditions local to said guiding device are dangerous, except the guiding device continuing operation when local conditions inside a door are dangerous but local conditions outside the same door are acceptable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.