GB272914A - Improvements relating to the detection of suspended matter in fluids and the operation of means for indicating its presence - Google Patents
Improvements relating to the detection of suspended matter in fluids and the operation of means for indicating its presenceInfo
- Publication number
- GB272914A GB272914A GB15863/27A GB1586327A GB272914A GB 272914 A GB272914 A GB 272914A GB 15863/27 A GB15863/27 A GB 15863/27A GB 1586327 A GB1586327 A GB 1586327A GB 272914 A GB272914 A GB 272914A
- Authority
- GB
- United Kingdom
- Prior art keywords
- light
- cell
- source
- suspended matter
- circuit
- 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
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
- G01N21/53—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Fire-Detection Mechanisms (AREA)
Abstract
272,914. Kidde & Co., Inc., W., (Assignees of Freygang, W. H.). June 17, 1926, [Convention date]. Light radiations, control of apparatus by.-In a method for giving automatic warning of the presence of suspended matter in fluid, for example smoke, light is directed by the suspended matter by reflection and/or refraction upon a normally non-illuminated light sensitive element, for example a photo-electric cell, arranged in an alarm circuit. As shown in Fig. 1, smoke-laden gases are drawn from spaces to be protected by pipes 3 and pass through tubes 5 to a detection chamber 6. At one side of this chamber is a light-sensitive cell 1 in a casing 2 having a window 11. Light from a source 8 is directed through the tubes 5 by suitable lenses and mirrors, and is reflected or refracted by the suspended particles upon the cell 1, energizing the latter and operating an alarm. As shown in Fig. 6, the cell 1 is in circuit with a resistance 14, battery 13, and relay 21 through a three-electrode thermionic amplifier 16. The relay 21 is in circuit with a battery 25 and bell 24. In a modification, the light from the source 8 is concentrated to a parallel beam travelling across the path of gases issuing from a single smoke pipe. In modifications of the first arrangement, the reflected light is concentrated on the cell by a parabolic mirror, or by a lens arranged in the window of the casing 2. In another modification, several sensitive cells are provided, light from the source 8 being distributed by a lens system. Specification 191,856, [Class 47 (ii), Fire-extinguishing &c.], is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US272914XA | 1926-06-17 | 1926-06-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB272914A true GB272914A (en) | 1928-11-14 |
Family
ID=21836829
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB15863/27A Expired GB272914A (en) | 1926-06-17 | 1927-06-14 | Improvements relating to the detection of suspended matter in fluids and the operation of means for indicating its presence |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB272914A (en) |
-
1927
- 1927-06-14 GB GB15863/27A patent/GB272914A/en not_active Expired
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