FR1177774A - Perfectionnements aux appareils de comptage des petites particules - Google Patents

Perfectionnements aux appareils de comptage des petites particules

Info

Publication number
FR1177774A
FR1177774A FR1177774DA FR1177774A FR 1177774 A FR1177774 A FR 1177774A FR 1177774D A FR1177774D A FR 1177774DA FR 1177774 A FR1177774 A FR 1177774A
Authority
FR
France
Prior art keywords
small particle
particle counting
counting devices
devices
small
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
Other languages
English (en)
Inventor
Paul James Crosland-Taylor
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.)
Evans Electroselenium Ltd
Original Assignee
Evans Electroselenium Ltd
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 Evans Electroselenium Ltd filed Critical Evans Electroselenium Ltd
Application granted granted Critical
Publication of FR1177774A publication Critical patent/FR1177774A/fr
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
    • G01N15/10—Investigating individual particles
    • G01N15/14—Optical investigation techniques, e.g. flow cytometry
    • G01N15/1429—Signal processing
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06M—COUNTING MECHANISMS; COUNTING OF OBJECTS NOT OTHERWISE PROVIDED FOR
    • G06M11/00—Counting of objects distributed at random, e.g. on a surface
    • G06M11/02—Counting of objects distributed at random, e.g. on a surface using an electron beam scanning a surface line by line, e.g. of blood cells on a substrate
    • G06M11/04—Counting of objects distributed at random, e.g. on a surface using an electron beam scanning a surface line by line, e.g. of blood cells on a substrate with provision for distinguishing between different sizes of objects
    • 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
    • G01N15/10—Investigating individual particles
    • G01N15/14—Optical investigation techniques, e.g. flow cytometry
    • G01N2015/1486—Counting the particles
    • 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
    • G01N15/10—Investigating individual particles
    • G01N15/14—Optical investigation techniques, e.g. flow cytometry
    • G01N2015/1493—Particle size
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S55/00—Gas separation
    • Y10S55/34—Indicator and controllers

Landscapes

  • Chemical & Material Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Dispersion Chemistry (AREA)
  • Signal Processing (AREA)
  • Theoretical Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
FR1177774D 1960-04-26 1957-05-16 Perfectionnements aux appareils de comptage des petites particules Expired FR1177774A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US24768A US3127505A (en) 1960-04-26 1960-04-26 Aerosol particle counter

Publications (1)

Publication Number Publication Date
FR1177774A true FR1177774A (fr) 1959-04-29

Family

ID=21822303

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1177774D Expired FR1177774A (fr) 1960-04-26 1957-05-16 Perfectionnements aux appareils de comptage des petites particules

Country Status (3)

Country Link
US (1) US3127505A (fr)
FR (1) FR1177774A (fr)
GB (1) GB953715A (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3392331A (en) * 1961-04-06 1968-07-09 Coulter Electronics Particle analyzer threshold level control
NL294827A (fr) * 1962-07-02
US3388260A (en) * 1964-04-23 1968-06-11 Boon William Photosensitive device for conveying and counting fabrics
US3345502A (en) * 1964-08-14 1967-10-03 Robert H Berg Pulse analyzer computer
USB420712I5 (fr) * 1964-12-23
US3493304A (en) * 1965-02-03 1970-02-03 Leopold Rovner Electronic microparticle counter
US3449053A (en) * 1965-04-29 1969-06-10 Mc Donnell Douglas Corp Microscopic examining apparatus utilizing scanning techniques
US3331950A (en) * 1966-07-11 1967-07-18 Coulter Electronics Particle distribution plotting apparatus
US3557352A (en) * 1967-11-01 1971-01-19 Coulter Electronics Apparatus and method for measuring a dividing particle size of a particulate system
US3441848A (en) * 1968-04-29 1969-04-29 Coulter Electronics Particle length measuring apparatus
CH538787A (de) * 1971-11-09 1973-06-30 Contraves Ag Verfahren und Einrichtung zur Erzeugung einer Grösse, die der mittleren Impulsscheitelhöhe einer Vielzahl von Eingangsimpulsen proportional ist
US3894221A (en) * 1974-03-01 1975-07-08 Coulter Electronics Speed up circuit in an apparatus for measuring a dividing particle size of a particulate system

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1219373A (en) * 1916-03-27 1917-03-13 Cyrus D Byers Reversing device for pumps.
US1482376A (en) * 1921-12-26 1924-02-05 Albert C Anderson Pump
US2520932A (en) * 1945-04-26 1950-09-05 Conrad H Hoeppner Secondary emission circuit for amplitude discrimination
US2494441A (en) * 1948-07-28 1950-01-10 Rca Corp Method and apparatus for electronically determining particle size distribution
US2661902A (en) * 1950-01-10 1953-12-08 Nat Res Dev Apparatus for counting microscopic particles
US2731202A (en) * 1951-04-03 1956-01-17 Rca Corp Electronic particle counting apparatus
US2673294A (en) * 1951-08-10 1954-03-23 Ca Nat Research Council Discriminator circuit
US2775159A (en) * 1952-02-20 1956-12-25 Joseph C Frommer Method and apparatus for the counting of particles per unit volume in a fluid
US2920525A (en) * 1956-08-13 1960-01-12 Arthur V Appel Apparatus for automatically counting and sizing airborne particles

Also Published As

Publication number Publication date
GB953715A (en) 1964-04-02
US3127505A (en) 1964-03-31

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