GB1330587A - Particle size analyzing apparatus and method using threshold level control - Google Patents

Particle size analyzing apparatus and method using threshold level control

Info

Publication number
GB1330587A
GB1330587A GB2254671A GB2254671A GB1330587A GB 1330587 A GB1330587 A GB 1330587A GB 2254671 A GB2254671 A GB 2254671A GB 2254671 A GB2254671 A GB 2254671A GB 1330587 A GB1330587 A GB 1330587A
Authority
GB
United Kingdom
Prior art keywords
switch
time
circuit
accumulated
gate
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
GB2254671A
Other languages
English (en)
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.)
Coulter Electronics Ltd
Coulter Electronics Inc
Original Assignee
Coulter Electronics Ltd
Coulter Electronics Inc
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 Coulter Electronics Ltd, Coulter Electronics Inc filed Critical Coulter Electronics Ltd
Publication of GB1330587A publication Critical patent/GB1330587A/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
    • G01N15/10—Investigating individual particles
    • G01N15/1031—Investigating individual particles by measuring electrical or magnetic effects
    • G01N15/12—Investigating individual particles by measuring electrical or magnetic effects by observing changes in resistance or impedance across apertures when traversed by individual particles, e.g. by using the Coulter principle
    • 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
    • G01N15/1031—Investigating individual particles by measuring electrical or magnetic effects
    • G01N15/12—Investigating individual particles by measuring electrical or magnetic effects by observing changes in resistance or impedance across apertures when traversed by individual particles, e.g. by using the Coulter principle
    • G01N15/131—Details
    • G01N15/132—Circuits

Landscapes

  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
GB2254671A 1970-05-25 1971-04-19 Particle size analyzing apparatus and method using threshold level control Expired GB1330587A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US4023170A 1970-05-25 1970-05-25

Publications (1)

Publication Number Publication Date
GB1330587A true GB1330587A (en) 1973-09-19

Family

ID=21909862

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2254671A Expired GB1330587A (en) 1970-05-25 1971-04-19 Particle size analyzing apparatus and method using threshold level control

Country Status (12)

Country Link
US (1) US3757213A (enExample)
BE (1) BE763433A (enExample)
CA (1) CA937289A (enExample)
CH (1) CH535954A (enExample)
DE (1) DE2109046A1 (enExample)
ES (1) ES388642A1 (enExample)
FR (1) FR2092378A5 (enExample)
GB (1) GB1330587A (enExample)
IL (1) IL36295A (enExample)
NL (1) NL7102426A (enExample)
SE (1) SE369119B (enExample)
ZA (1) ZA711210B (enExample)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3810011A (en) * 1970-05-25 1974-05-07 Coulter Electronics Apparatus and method for analyzing the particle volume distribution for a plurality of particles of different size in a quantity of liquid
US3973189A (en) * 1972-05-15 1976-08-03 General Science Corporation Hematology system
US3828260A (en) * 1973-04-02 1974-08-06 Royco Instr Inc Hematocrit measuring apparatus
US3863056A (en) * 1973-06-29 1975-01-28 Coulter Electronics Method and apparatus for multichannel voting
US3982183A (en) * 1975-02-20 1976-09-21 Coulter Electronics, Inc. Particle sizing apparatus
US4110604A (en) * 1976-11-04 1978-08-29 Becton, Dickinson And Company Particle density measuring system
US4450435A (en) * 1981-11-30 1984-05-22 Bobby Dencil James Analog debris alarm
US4704364A (en) * 1984-05-18 1987-11-03 Coulter Electronics, Inc. Hematology control compositions for three populations of leukocytes; and methods for their preparation and use in whole blood control systems
US5204884A (en) * 1991-03-18 1993-04-20 University Of Rochester System for high-speed measurement and sorting of particles
US6999171B2 (en) * 2001-08-07 2006-02-14 Sysmex Corporation Apparatus and method for measuring particle size
US7701193B2 (en) * 2003-09-02 2010-04-20 Chempaq A/S Pulse height analyser
RU2296327C2 (ru) * 2004-08-30 2007-03-27 Федеральное государственное учреждение науки "Государственный научный центр вирусологии и биотехнологии "Вектор" Федеральной службы по надзору в сфере защиты прав потребителей и благополучия человека (ФГУН ГНЦ ВБ "Вектор" Роспотребнадзора) Способ дифференциальной диагностики заболеваний печени
AU2005291725B2 (en) * 2004-10-01 2011-07-14 Koninklijke Philips Electronics N.V. A method for calibrating a particle counting apparatus
WO2009109190A1 (en) * 2008-03-03 2009-09-11 Chempaq A/S High resolution classification

Also Published As

Publication number Publication date
FR2092378A5 (enExample) 1972-01-21
CH535954A (fr) 1973-04-15
SE369119B (enExample) 1974-08-05
ES388642A1 (es) 1974-02-16
CA937289A (en) 1973-11-20
ZA711210B (en) 1972-09-27
BE763433A (fr) 1971-08-25
NL7102426A (enExample) 1971-11-29
IL36295A (en) 1973-11-28
IL36295A0 (en) 1971-04-28
US3757213A (en) 1973-09-04
DE2109046A1 (de) 1971-12-02

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Legal Events

Date Code Title Description
414F Notice of opposition given (sect. 14/1949)
414E Application relinquished (sect. 14/1949)
CSNS Application of which complete specification have been accepted and published, but patent is not sealed