GB477338A - Improvements in or relating to the detection and indication of the presence of inflammable vapours or gases - Google Patents
Improvements in or relating to the detection and indication of the presence of inflammable vapours or gasesInfo
- Publication number
- GB477338A GB477338A GB1761436A GB1761436A GB477338A GB 477338 A GB477338 A GB 477338A GB 1761436 A GB1761436 A GB 1761436A GB 1761436 A GB1761436 A GB 1761436A GB 477338 A GB477338 A GB 477338A
- Authority
- GB
- United Kingdom
- Prior art keywords
- switch
- diaphragm
- carbon dioxide
- contact
- atmosphere
- 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
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
- G01N25/22—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures
- G01N25/28—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures the rise in temperature of the gases resulting from combustion being measured directly
- G01N25/34—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures the rise in temperature of the gases resulting from combustion being measured directly using mechanical temperature-responsive elements, e.g. bimetallic
- G01N25/36—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures the rise in temperature of the gases resulting from combustion being measured directly using mechanical temperature-responsive elements, e.g. bimetallic for investigating the composition of gas mixtures
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
<PICT:0477338/III/1> <PICT:0477338/III/2> In apparatus for the detection and estimation of inflammable gases or vapours having a thermally-operated switch, e.g. a bi-metallic switch, designed to operate at a heating effect corresponding to a given percentage of combustible gas, the switch is automatically adjusted to compensate for oxygen deficiency or variations in the carbon dioxide content of the atmosphere. For example, the thermal switch may be a bi-metallic diaphragm 1 arranged over the flame or burner 12, and operating a warning lamp 13. Connection between the inner side of the diaphragm and the atmosphere is made via pipe 4, through a vessel 5 containing an absorbent for carbon dioxide, so that on increase in the carbon dioxide content, or decrease in oxygen, an increased vacuum is applied to the diaphragm bringing contacts 2 and 3 closer together, so that the switch will be operated by the less heat generated in an oxygen-deficient atmosphere when the predetermined content of combustible gas is attained. Initial adjustments are made by adjusting the contact 3 by screw 11. By applying a vacuum through branch pipe 8, the accuracy of the warning device may be tested. In a modification shown in Fig. 2, one contact 22 is carried by a bi-metallic strip 21, the other contact being carried by a hollow diaphragm 24 which collapses as before bringing the contacts closer together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1761436A GB477338A (en) | 1936-06-25 | 1936-06-25 | Improvements in or relating to the detection and indication of the presence of inflammable vapours or gases |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1761436A GB477338A (en) | 1936-06-25 | 1936-06-25 | Improvements in or relating to the detection and indication of the presence of inflammable vapours or gases |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB477338A true GB477338A (en) | 1937-12-28 |
Family
ID=10098215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1761436A Expired GB477338A (en) | 1936-06-25 | 1936-06-25 | Improvements in or relating to the detection and indication of the presence of inflammable vapours or gases |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB477338A (en) |
-
1936
- 1936-06-25 GB GB1761436A patent/GB477338A/en not_active Expired
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