GB480335A - Device for signalling the presence of illuminating gas in inhabited premises - Google Patents
Device for signalling the presence of illuminating gas in inhabited premisesInfo
- Publication number
- GB480335A GB480335A GB23045/36A GB2304536A GB480335A GB 480335 A GB480335 A GB 480335A GB 23045/36 A GB23045/36 A GB 23045/36A GB 2304536 A GB2304536 A GB 2304536A GB 480335 A GB480335 A GB 480335A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bulb
- thermometer
- pict
- iii
- signalling
- 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
- G01N25/44—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 heat developed being transferred to a fixed quantity of fluid
- G01N25/46—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 heat developed being transferred to a fixed quantity of fluid for investigating the composition of gas mixtures
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (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 Materials Using Thermal Means (AREA)
Abstract
<PICT:0480335/III/1> <PICT:0480335/III/2> In inflammable-gas detectors of the type comprising a differential gas thermometer with electric contact operating a signalling circuit, one bulb of the thermometer being externally provided with a catalyst, the following improvements are embodied together or separately, viz.: (1) the bulb A is surrounded by a cylinder 6 of inert material having the same thermal conductivity as the cylinder 7 of catalyst surrounding the bulb B; (2) the contact wires 1, 2, Fig. 3, are situated partly within the bulb A so that closing of the circuit heats this bulb and breaks the contact again, producing an intermittent signal; (3) the thermometer is of rectilinear form and may have two small bulbs 1, 2, Fig. 2, in its capillary part. The Specification as open to inspection under Sect. 91 comprises also all detectors of the type referred to which are sensitive to very small increases of temperature, namely less than 12 DEG C. and preferably only 3 DEG C. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT2178486X | 1935-12-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB480335A true GB480335A (en) | 1938-02-21 |
Family
ID=32071296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB23045/36A Expired GB480335A (en) | 1935-12-19 | 1936-08-21 | Device for signalling the presence of illuminating gas in inhabited premises |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2178486A (en) |
| FR (1) | FR811440A (en) |
| GB (1) | GB480335A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2666105A (en) * | 1948-08-10 | 1954-01-12 | Menozzi Giuseppe | Apparatus for signaling the escape of illuminating gas and other similar combustiblegases |
| US2881274A (en) * | 1957-06-24 | 1959-04-07 | Gen Controls Co | Gas detector and system for gas detection |
| US3801973A (en) * | 1972-12-04 | 1974-04-02 | Gen Motors Corp | Emission sensor |
-
1936
- 1936-08-21 FR FR811440D patent/FR811440A/en not_active Expired
- 1936-08-21 GB GB23045/36A patent/GB480335A/en not_active Expired
- 1936-08-29 US US98613A patent/US2178486A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US2178486A (en) | 1939-10-31 |
| FR811440A (en) | 1937-04-14 |
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