GB652133A - Improvements in and relating to the electrical detection of vapours and the like - Google Patents
Improvements in and relating to the electrical detection of vapours and the likeInfo
- Publication number
- GB652133A GB652133A GB23410/48A GB2341048A GB652133A GB 652133 A GB652133 A GB 652133A GB 23410/48 A GB23410/48 A GB 23410/48A GB 2341048 A GB2341048 A GB 2341048A GB 652133 A GB652133 A GB 652133A
- Authority
- GB
- United Kingdom
- Prior art keywords
- loud
- sept
- speaker
- current
- produce
- 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
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
- G01M3/202—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material using mass spectrometer detection systems
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Abstract
652,133. Determining physical qualities of materials. BRITISH THOMSON-HOUSTON CO., Ltd. Sept. 6, 1948, No. 23410. Convention date, Sept. 18, 1947. Addition to 652,132. [Class 37] Apparatus as described. in Specification 648,367 and the parent Specification for detecting certain finely divided substances in a gas by bringing the gas into contact with a positively charged electrode to produce a flow of positive ions is characterized by the addition of audible or visual means for indicating the presence of the detected substance by means of a bridge circuit. As shown, the discharge cell 1, together with resistance 15 and potentiometer 16, form a bridge, whose unbalance current is amplified by valve 17 and indicated by a meter 22 in the anode lead. The anode current may also produce a pulsating current by charging condenser 29 in parallel with discharge tube 23, the resulting A.C. being fed to a loud-speaker 30 via an amplifier valve 31. Visual indications may be obtained from the discharge tube 23, or the loud-speaker 30 may be replaced by suitable light producing means.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US652133XA | 1947-09-18 | 1947-09-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB652133A true GB652133A (en) | 1951-04-18 |
Family
ID=22061098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB23410/48A Expired GB652133A (en) | 1947-09-18 | 1948-09-06 | Improvements in and relating to the electrical detection of vapours and the like |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB652133A (en) |
-
1948
- 1948-09-06 GB GB23410/48A patent/GB652133A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3114877A (en) | Particle detector having improved unipolar charging structure | |
| ES471120A1 (en) | Method and apparatus for particle analysis | |
| GB854594A (en) | Process and device for the electrical detection of aerosols in gases | |
| GB398722A (en) | Improvements in process and apparatus for detecting, controlling and analysing gases, mixtures of gases, smokes and dusts suspended in said gases | |
| SU654193A3 (en) | Method of determining relative volume of particles in liquid and device for effecting same | |
| GB652061A (en) | Improvements in and relating to electrical detectors of vapours and the like | |
| ES445837A1 (en) | Moisture indicating apparatus | |
| GB678430A (en) | Improvements in method of and apparatus for determining moisture content of tobacco | |
| DE3578952D1 (en) | APPARATUS FOR DETECTING AND MEASURING SUSPENDED PARTICLES IN MOLTEN METAL. | |
| GB652133A (en) | Improvements in and relating to the electrical detection of vapours and the like | |
| GB652132A (en) | Improvements in and relating to the electrical detection of vapours and the like | |
| GB567280A (en) | Improvements in and relating to apparatus for testing by x-ray ionization | |
| GB648367A (en) | Improvements in and relating to electric detector of vapours and the like | |
| GB1024552A (en) | Improvements in and relating to the electrical detection of aerosols in air | |
| ATE98798T1 (en) | PROCEDURE FOR OPERATING AN IONIZATION SMOKE DETECTOR AND IONIZATION SMOKE DETECTOR. | |
| GB804323A (en) | Improvements relating to the detection of surface cracks in electrically conducting materials | |
| JPS5697865A (en) | Ionization detector | |
| GB840935A (en) | Improvements in and relating to apparatus for continuously measuring the concentration of substances present in a fluid | |
| Bednarkiewicz et al. | Comparison of the utility of several tensammetric techniques for the determination of traces of surfactants after preconcentration at the hanging mercury drop electrode | |
| GB1436287A (en) | Ion monitoring method and apparatus | |
| JPS527785A (en) | Counter tube for measuring low-speed electrons | |
| JPS53119094A (en) | Particle size distribution measuring instrument | |
| JPS5284795A (en) | Analyzer using ion selective electrode | |
| GB681675A (en) | Improvements in and relating to leak detectors | |
| JPS51111386A (en) | Apparatus for radiation analysis |