GB722947A - Improvements relating to measuring apparatus for estimating the number of particles in a suspension - Google Patents

Improvements relating to measuring apparatus for estimating the number of particles in a suspension

Info

Publication number
GB722947A
GB722947A GB21070/52A GB2107052A GB722947A GB 722947 A GB722947 A GB 722947A GB 21070/52 A GB21070/52 A GB 21070/52A GB 2107052 A GB2107052 A GB 2107052A GB 722947 A GB722947 A GB 722947A
Authority
GB
United Kingdom
Prior art keywords
light
angle
cells
cell
mirror
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
Application number
GB21070/52A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HANS HERMANN LOESCHCKE
Original Assignee
HANS HERMANN LOESCHCKE
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by HANS HERMANN LOESCHCKE filed Critical HANS HERMANN LOESCHCKE
Publication of GB722947A publication Critical patent/GB722947A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N15/06—Investigating concentration of particle suspensions
    • 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

  • Chemical & Material Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Dispersion Chemistry (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

722,947. Examining solutions photo-electrically. LOESCHCKE, H. H., and WEVER, R. Aug. 21, 1952 [Aug. 21, 1951], No. 21070/52. Addition to 688,653 and 688,945. Class 40 (3). The invention of the parent Specification in which the number of particles in a solution is estimated by measuring the proportion of light diffracted outside an angle 2#<SP>1</SP> where sin #<SP>1</SP>#0.73 #/fm, fm being the predominating projected area of the individual particle is now modified so that one photocell responds to the light outside this angle and another to the light within the angle, the outputs of the cells being applied in opposition to each other to a common indicating circuit. As shown, light from a source 1 passes through a circular diaphragm 1a, is made monochromatic by a filter 3, and is focused by a lens 2 in a converging beam through specimen carrier 4. The beam of light from the lens converges in a point image of the source on to a concave mirror 5 which subtends an angle #<SP>1</SP> at the centre 0 of the specimen carrier, while a larger concave mirror 6 subtends an angle #<SP>2</SP> at 0, #<SP>2</SP> being not less than four times #<SP>1</SP>. The small mirror 5 is arranged in front of the large mirror 6 and as nearly as possible concentrically with it, but the optical axes of the mirrors are inclined in opposite directions to the main beam. Thus light within the angle #<SP>1</SP> is reflected to photo-cell 7 while light between #<SP>1</SP> and #<SP>2</SP> is reflected to cell 8. The outputs of the two cells are supplied to potentiometers 9 and 10 respectively (Fig. 2), and cell 7 is used for the measurement, tapping 12 being adjusted until meter 11 reads zero when the position of the tapping indicates particle concentration. Potentiometer 10 is used to reset the apparatus to take account of variation in cell characteristics. The potentiometers may be replaced by means for stopping down the light reaching one of the cells. The apparatus may be used to indicate total light absorption by replacing filters 3 by a diffusing plate, the cells being connected in parallel so that they both feed the same potentiometer. A variable shutter may be used for adjustment of the absorption calibrations.
GB21070/52A 1949-08-22 1952-08-21 Improvements relating to measuring apparatus for estimating the number of particles in a suspension Expired GB722947A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE688653X 1949-08-22
DE297254X 1949-08-22
DE141150X 1950-11-14
DE305644X 1951-08-21

Publications (1)

Publication Number Publication Date
GB722947A true GB722947A (en) 1955-02-02

Family

ID=27430521

Family Applications (3)

Application Number Title Priority Date Filing Date
GB20685/50A Expired GB688653A (en) 1949-08-22 1950-08-21 Improvements relating to photo-electric measuring apparatus
GB29522/50A Expired GB688945A (en) 1949-08-22 1950-12-01 Improvements relating to measuring apparatus for estimating the number of particles in a suspension
GB21070/52A Expired GB722947A (en) 1949-08-22 1952-08-21 Improvements relating to measuring apparatus for estimating the number of particles in a suspension

Family Applications Before (2)

Application Number Title Priority Date Filing Date
GB20685/50A Expired GB688653A (en) 1949-08-22 1950-08-21 Improvements relating to photo-electric measuring apparatus
GB29522/50A Expired GB688945A (en) 1949-08-22 1950-12-01 Improvements relating to measuring apparatus for estimating the number of particles in a suspension

Country Status (4)

Country Link
CH (3) CH278998A (en)
DE (3) DE881877C (en)
FR (1) FR1088567A (en)
GB (3) GB688653A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4167335A (en) * 1977-12-16 1979-09-11 Leeds & Northrup Company Apparatus and method for linearizing a volume loading measurement utilizing particle scattering

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2816479A (en) * 1954-07-06 1957-12-17 Du Pont Particle measurement
US2873644A (en) * 1955-02-08 1959-02-17 American Instr Co Inc Optical system for the measurement of turbidity
US3011346A (en) * 1957-07-11 1961-12-05 California Research Corp Apparatus for gravity gradient surveying
US3008370A (en) * 1958-07-21 1961-11-14 Antonjo M Uribe Photometric apparatus
DE1296828B (en) * 1963-02-18 1969-06-04 Toa Tokushu Denki Kabushiki Ka Device for measuring the concentration of a colloid
US3597087A (en) * 1968-12-31 1971-08-03 Ball Brothers Res Corp Sample degradation determining method and apparatus
DE2103318B2 (en) * 1970-01-29 1973-10-04 Beckman Instruments, Inc., Fullerton, Calif. (V.St.A.) Scatter photometer
DE3018021A1 (en) * 1979-05-16 1980-11-27 Honeywell Inc OPTICAL SMOKE DETECTOR
DE3608552A1 (en) * 1986-03-14 1987-09-17 Bayer Ag Nephelometer
DE3630292C1 (en) * 1986-09-05 1988-02-11 Suck Thomas Adolf Scattered light photometer
DE59609823D1 (en) * 1995-11-30 2002-11-28 Thermo Labsystems Oy Vantaa nephelometer
SE530896C2 (en) * 2005-04-01 2008-10-14 Diaspect Medical Ab Device for determining a blood hemoglobin concentration
EP2957896A1 (en) * 2014-06-17 2015-12-23 Siemens Healthcare Diagnostics Products GmbH Optical device for guiding a beam of radiation and aperture for integration into the same
CN105784552B (en) * 2014-12-24 2019-08-06 周志斌 Particle concentration detection method
CN115629025A (en) * 2017-02-06 2023-01-20 霍尼韦尔国际公司 Particulate matter sensor with novel turnover mechanism for forming air flow

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH258050A (en) * 1944-12-15 1948-11-15 Gmbh Ernst Leitz Device for measuring the turbidity of a liquid.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4167335A (en) * 1977-12-16 1979-09-11 Leeds & Northrup Company Apparatus and method for linearizing a volume loading measurement utilizing particle scattering

Also Published As

Publication number Publication date
FR1088567A (en) 1955-03-08
GB688945A (en) 1953-03-18
CH305644A (en) 1955-02-28
CH297254A (en) 1954-03-15
DE881877C (en) 1953-07-02
DE913590C (en) 1954-06-14
DE924173C (en) 1955-02-28
CH278998A (en) 1951-11-15
GB688653A (en) 1953-03-11

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