GB396390A - - Google Patents
Info
- Publication number
- GB396390A GB396390A GB396390DA GB396390A GB 396390 A GB396390 A GB 396390A GB 396390D A GB396390D A GB 396390DA GB 396390 A GB396390 A GB 396390A
- Authority
- GB
- United Kingdom
- Prior art keywords
- light
- lens
- scattered
- cambridge
- focus
- 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.)
- Active
Links
Abstract
396,390. Turbidometers. MOSS, E. B., 19, Leys Road, Cambridge, and CAMBRIDGE INSTRUMENT CO., Ltd., Cambridge. Feb. 1, 1932, No. 3020. [Class 97 (iii).] Apparatus for the detection, measurement, or recording of suspended particles, e.g. smoke or thin fogs, in a transparent medium comprises an optical system with an illuminating beam which together with the light scattered by the optical parts is prevented from reaching a light sensitive element by stops arranged to allow light scattered by the suspended matter to reach the sensitive element. In the form shown, light from a source a is focused by a lens combination b on to a lens d and is arrested by a stop c, preferably of reflecting material, placed in front of the lens d. The light scattered by imperfections in or dust on the lens b is brought to a focus by the lens d and falls on the stop e. Light falling on suspended particles, e.g. the particle x, between the lenses b, d, is scattered and some of the scattered light is brought by the lens d to a focus at y at which point is placed a light sensitive device such as a photo-electric cell or thermopile.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB396390A true GB396390A (en) |
Family
ID=1745613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB396390D Active GB396390A (en) |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB396390A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2721495A (en) * | 1952-03-06 | 1955-10-25 | Gen Electric | Method and apparatus for detecting minute crystal forming particles suspended in a gaseous atmosphere |
| US2731874A (en) * | 1953-06-22 | 1956-01-24 | Smoke detecting apparatus | |
| US2760417A (en) * | 1953-01-21 | 1956-08-28 | Jr Clande Laval | Submersible photographic apparatus |
| US2769365A (en) * | 1949-08-22 | 1956-11-06 | Loeschcke Hans | Counting device for microscopic particles |
| US2788702A (en) * | 1951-09-24 | 1957-04-16 | Leeds & Northrup Co | Measurement of light scattering |
| US2812686A (en) * | 1953-12-22 | 1957-11-12 | Johns Manville | Smoke photometer |
| US2816479A (en) * | 1954-07-06 | 1957-12-17 | Du Pont | Particle measurement |
| US3361030A (en) * | 1961-09-21 | 1968-01-02 | Leonard J. Goldberg | System and method for detecting small particles |
| US3597087A (en) * | 1968-12-31 | 1971-08-03 | Ball Brothers Res Corp | Sample degradation determining method and apparatus |
| US5024527A (en) * | 1986-02-12 | 1991-06-18 | British Aerospace Public Limited Company | Method and apparatus for remote position sensing using edge diffraction |
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0
- GB GB396390D patent/GB396390A/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2769365A (en) * | 1949-08-22 | 1956-11-06 | Loeschcke Hans | Counting device for microscopic particles |
| US2788702A (en) * | 1951-09-24 | 1957-04-16 | Leeds & Northrup Co | Measurement of light scattering |
| US2721495A (en) * | 1952-03-06 | 1955-10-25 | Gen Electric | Method and apparatus for detecting minute crystal forming particles suspended in a gaseous atmosphere |
| US2760417A (en) * | 1953-01-21 | 1956-08-28 | Jr Clande Laval | Submersible photographic apparatus |
| US2731874A (en) * | 1953-06-22 | 1956-01-24 | Smoke detecting apparatus | |
| US2812686A (en) * | 1953-12-22 | 1957-11-12 | Johns Manville | Smoke photometer |
| US2816479A (en) * | 1954-07-06 | 1957-12-17 | Du Pont | Particle measurement |
| US3361030A (en) * | 1961-09-21 | 1968-01-02 | Leonard J. Goldberg | System and method for detecting small particles |
| US3597087A (en) * | 1968-12-31 | 1971-08-03 | Ball Brothers Res Corp | Sample degradation determining method and apparatus |
| US5024527A (en) * | 1986-02-12 | 1991-06-18 | British Aerospace Public Limited Company | Method and apparatus for remote position sensing using edge diffraction |
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