Fire detector housing
US4236822A · kind A · utility
28Cited by
1References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 22, 1979 |
| Grant date | Dec 2, 1980 |
| Priority date | — |
| Expiry date | Jan 22, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B17/113
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A housing for a fire detector has a circumferential area including a series of vanes or slats, each positioned at an angle with respect to the tangent at the periphery of the housing. The angle is about 45.degree., which not only allows ready entrance of gases through the major portion of the "window" defined by the vanes, but also prevents particles from passing straight through the housing and out the other side. This effects good mixing of the gases, better detection of combustion particles, and also decreases the likelihood of spurious or incorrect signals due to extraneous air currents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.