GB507219A - Device for signalling the presence of gas in inhabited premises - Google Patents
Device for signalling the presence of gas in inhabited premisesInfo
- Publication number
- GB507219A GB507219A GB3426437A GB3426437A GB507219A GB 507219 A GB507219 A GB 507219A GB 3426437 A GB3426437 A GB 3426437A GB 3426437 A GB3426437 A GB 3426437A GB 507219 A GB507219 A GB 507219A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bulb
- gas
- bulbs
- capillary
- mercury
- 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
Abstract
507,219. Gas detectors; switches. MENOZZI, G. Dec. 10, 1937, No. 34264. Addition to 480,335. [Class 1 (i)] [Also in Group XXXVII] In the inflammable-gas detector of the parent Specification, which is of the type in which a differential gas thermometer having one bulb surrounded by a catalyst is provided with electric contacts operating a signalling circuit, one or more of the following further improvements is or are embodied. As the expansion medium in the bulbs there is used a saturated vapour, or a gas under pressure. The movement of the mercury to close the circuit is facilitated by a conical expansion of the capillary, Fig. 1, and/or by sealing the wires into the glass at a point remote from the point of contact, Fig. 11, to avoid distortion of the capillary. Instead of a straight tube a U-tube may be used provided that the mercury extends over only a small segment of the bend. The capillary may be extended into the bulbs or constricted-near its ends 5, Fig. 11, to prevent spilling of the mercury. The bulbs may be covered with a thin layer of heatconducting material. The heating of the non-catalytic bulb when the circuit is closed, in order to give an intermittent signal, may be effected by an internal resistance 2, Fig. 6, which may be regulated by a shunt 4, or by an external resistance wound found the bulb. Where there are equal lengths of wire in each bulb as shown in Fig. 11, that in the catalytic bulb may have a heat-insulating covering 4, or may be partly shunted by an external variable resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3426437A GB507219A (en) | 1937-12-10 | 1937-12-10 | Device for signalling the presence of gas in inhabited premises |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3426437A GB507219A (en) | 1937-12-10 | 1937-12-10 | Device for signalling the presence of gas in inhabited premises |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB507219A true GB507219A (en) | 1939-06-12 |
Family
ID=10363476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3426437A Expired GB507219A (en) | 1937-12-10 | 1937-12-10 | Device for signalling the presence of gas in inhabited premises |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB507219A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1176399B (en) * | 1960-10-03 | 1964-08-20 | Bendix Corp | Method for measuring a quantity of heat measured value proportional to the oxygen content of a natural or artificial atmosphere and device for displaying the oxygen content of such atmospheres |
| WO2007128987A2 (en) | 2006-04-10 | 2007-11-15 | Fusion Antibodies Limited | Therapy targeting cathepsin s |
-
1937
- 1937-12-10 GB GB3426437A patent/GB507219A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1176399B (en) * | 1960-10-03 | 1964-08-20 | Bendix Corp | Method for measuring a quantity of heat measured value proportional to the oxygen content of a natural or artificial atmosphere and device for displaying the oxygen content of such atmospheres |
| WO2007128987A2 (en) | 2006-04-10 | 2007-11-15 | Fusion Antibodies Limited | Therapy targeting cathepsin s |
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