GB645511A - Improvements in and relating to nephelometers - Google Patents
Improvements in and relating to nephelometersInfo
- Publication number
- GB645511A GB645511A GB2479148A GB2479148A GB645511A GB 645511 A GB645511 A GB 645511A GB 2479148 A GB2479148 A GB 2479148A GB 2479148 A GB2479148 A GB 2479148A GB 645511 A GB645511 A GB 645511A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tube
- cells
- light
- photo
- bars
- 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
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
- G01N21/51—Scattering, i.e. diffuse reflection within a body or fluid inside a container, e.g. in an ampoule
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Optical Measuring Cells (AREA)
Abstract
645,511. Photo - - electric turbidometers. EVANS ELECTROSELENIUM, Ltd., and COLLINS, G. C. Sept. 22, 1948, No. 24791. [Class 40 (iii)] The cloudiness of suspensions in a liquid is measured by passing light axially upward through a test tube containing the liquid, the light being collimated by the convex bottom of the tube so that the presence of suspensions, e.g. bacterial growths, causes diffusion of light to photo-cells situated around the walls of the tube. As shown, the test tube 1, here shown dotted, is maintained vertical by a bush 14 and rests in a cup-shaped recess 4 in a plate 5. Light from a lamp 3 passes through a small aperture 7 in the bottom of the recess and is collimated by the convex bottom of the tube. The presence of suspensions diffuses some of this light to six photo-cells 8 situated around the base of the tube, all these cells being connected in parallel and their output indicated on a suitable meter (hidden). The quantity of light passing through the tube may be adjusted by means of a slidable apertured plate 11 adjustable by a screw 33 and a knob 13. The cells are held between a hexagonal boss 24 on the plate 5 and a larger boss 25 on an insulating ring 19 and spaced from the plate 5 by conducting bars 17. This causes the top of the photocells to incline away from the axis of the tube so as to avoid the danger of direct illumination. The photo-cells are urged towards the axis of the test tube by leaf-springs 26 which also serve to make contact with the backs of the photo-cells, the springs being screwed to the bars 17. These bars make contact with a conducting ring 20 situated between insulating ring 19 and a further insulating ring 18 by means of the screws by which bars 17 are attached to these rings. The supporting rings in turn depend from vertical bars 21 screwed to the instrument casing. Connections to the front of the cells are made by tags 28. A domed hinged cover 15 is provided to prevent light entering the top of the tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2479148A GB645511A (en) | 1948-09-22 | 1948-09-22 | Improvements in and relating to nephelometers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2479148A GB645511A (en) | 1948-09-22 | 1948-09-22 | Improvements in and relating to nephelometers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB645511A true GB645511A (en) | 1950-11-01 |
Family
ID=10217296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2479148A Expired GB645511A (en) | 1948-09-22 | 1948-09-22 | Improvements in and relating to nephelometers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB645511A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018081218A1 (en) * | 2016-10-25 | 2018-05-03 | Hach Company | Vial and cap for turbidity standard |
-
1948
- 1948-09-22 GB GB2479148A patent/GB645511A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018081218A1 (en) * | 2016-10-25 | 2018-05-03 | Hach Company | Vial and cap for turbidity standard |
| CN109564161A (en) * | 2016-10-25 | 2019-04-02 | 哈希公司 | Bottle and closure for turbidity standard |
| CN109564161B (en) * | 2016-10-25 | 2021-11-26 | 哈希公司 | Bottle and cap for turbidity standard liquids |
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