GB424594A - Improvements in or relating to the detection of incipient fires - Google Patents
Improvements in or relating to the detection of incipient firesInfo
- Publication number
- GB424594A GB424594A GB25760/33A GB2576033A GB424594A GB 424594 A GB424594 A GB 424594A GB 25760/33 A GB25760/33 A GB 25760/33A GB 2576033 A GB2576033 A GB 2576033A GB 424594 A GB424594 A GB 424594A
- Authority
- GB
- United Kingdom
- Prior art keywords
- chamber
- light
- atmosphere
- chambers
- smoke
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
- G08B17/11—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using an ionisation chamber for detecting smoke or gas
- G08B17/113—Constructional details
Landscapes
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fire-Detection Mechanisms (AREA)
Abstract
424,594. Smoke detectors. FOAMITE FIREFOAM, Ltd., and GILBERT, V. G. W., 55, Great Marlborough Street, London. Sept. 18, 1933, No. 25760. [Class 47 (i)] In a smoke-pipe system for detecting incipient fire at any of a number of places, a stream of atmosphere drawn by a fan through each smoke-pipe 5 is discharged diagonally across an individual inspection chamber 1. A beam of light L is projected across each chamber to intersect the stream of atmosphere a in a vertical plane which includes the line of sight from the inspection window 2 of the chamber. All the chambers are arranged in a common casing, and each chamber consists of a casting comprising inlet and outlet conduits c<1>, c<2>. The inlet and outlet i and l and the light opening o are formed with inwardly projecting flanges, and a similar light-screening flange is provided on the wall 1<c> of the chamber opposite to the light opening. Light from a common source 3 is distributed to the several chambers by mirrors 4. The streams of atmosphere discharged from the chambers 1 by the pipes 6 are passed successively to a photo-electric detector and alarm by means of a rotary conduit, u, Fig. 4, which is brought into register successively with the ports p to which the pipes 6 are connected, the ports normally opening into a space s connected to the suction fan by a pipe d. The detector unit, not shown, is arranged in the byepass g, n.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB25760/33A GB424594A (en) | 1933-09-18 | 1933-09-18 | Improvements in or relating to the detection of incipient fires |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB25760/33A GB424594A (en) | 1933-09-18 | 1933-09-18 | Improvements in or relating to the detection of incipient fires |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB424594A true GB424594A (en) | 1935-02-25 |
Family
ID=10232856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB25760/33A Expired GB424594A (en) | 1933-09-18 | 1933-09-18 | Improvements in or relating to the detection of incipient fires |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB424594A (en) |
-
1933
- 1933-09-18 GB GB25760/33A patent/GB424594A/en not_active Expired
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