GB1468332A - Particle counting system including a coincidence correction circuit - Google Patents

Particle counting system including a coincidence correction circuit

Info

Publication number
GB1468332A
GB1468332A GB608675A GB608675A GB1468332A GB 1468332 A GB1468332 A GB 1468332A GB 608675 A GB608675 A GB 608675A GB 608675 A GB608675 A GB 608675A GB 1468332 A GB1468332 A GB 1468332A
Authority
GB
United Kingdom
Prior art keywords
pulse
gate
output
particle
count
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
GB608675A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB1468332A publication Critical patent/GB1468332A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K21/00—Details of pulse counters or frequency dividers
    • H03K21/02—Input circuits
    • 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)
  • Measurement Of Radiation (AREA)
GB608675A 1974-03-01 1975-02-13 Particle counting system including a coincidence correction circuit Expired GB1468332A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US447530A US3864551A (en) 1974-03-01 1974-03-01 Coincidence correction circuit

Publications (1)

Publication Number Publication Date
GB1468332A true GB1468332A (en) 1977-03-23

Family

ID=23776728

Family Applications (1)

Application Number Title Priority Date Filing Date
GB608675A Expired GB1468332A (en) 1974-03-01 1975-02-13 Particle counting system including a coincidence correction circuit

Country Status (10)

Country Link
US (1) US3864551A (enExample)
JP (1) JPS5639417B2 (enExample)
BE (1) BE826007A (enExample)
CA (1) CA1013434A (enExample)
DE (1) DE2505837C3 (enExample)
ES (1) ES435131A1 (enExample)
FR (1) FR2262835B1 (enExample)
GB (1) GB1468332A (enExample)
NL (1) NL168333C (enExample)
ZA (1) ZA75616B (enExample)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE377612B (enExample) * 1973-11-09 1975-07-14 T L B Greverus
US3938038A (en) * 1974-07-01 1976-02-10 Coulter Electronics, Inc. Method and apparatus for providing primary coincidence correction during particle analysis
US3944791A (en) * 1974-07-10 1976-03-16 General Science Corporation Platelet count correction circuit
US4042808A (en) * 1975-08-11 1977-08-16 Angel Engineering Corporation Particle count correction
DE2547885C3 (de) * 1975-10-25 1980-05-08 Dr. Johannes Heidenhain Gmbh, 8225 Traunreut Elektronischer Zähler
JPS5598333A (en) * 1979-01-22 1980-07-26 Toa Medical Electronics Co Ltd Particle counting device
US4366372A (en) * 1979-06-01 1982-12-28 Innovative Design, Inc. Apparatus and method for counting repetitive marks on a running web
US4447883A (en) * 1981-05-26 1984-05-08 Technicon Instruments Corporation Coincidence-error correcting apparatus and method
JPS61113806A (ja) * 1984-11-07 1986-05-31 丸善工業株式会社 肩当パツトの製造方法
JPS62170507A (ja) * 1986-01-22 1987-07-27 北岸　茂 肩当パツトの製造方法
JPS63115027U (enExample) * 1987-01-14 1988-07-25
DE102006021487B3 (de) * 2006-05-05 2007-09-06 Parsum Gmbh Verfahren und Vorrichtung zur Bestimmung der in einem Partikelstrom enthaltenen Partikel
FR2917842A1 (fr) * 2007-06-19 2008-12-26 Commissariat Energie Atomique Dispositif et methode de comptage de particules elementaires emises par un fluide dans un conduit.

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3209130A (en) * 1962-04-30 1965-09-28 Westinghouse Electric Corp Digital measuring device
US3686665A (en) * 1969-12-31 1972-08-22 Leeds & Northrup Co Digital function generator

Also Published As

Publication number Publication date
CA1013434A (en) 1977-07-05
US3864551A (en) 1975-02-04
DE2505837C3 (de) 1979-07-26
NL168333B (nl) 1981-10-16
ES435131A1 (es) 1977-02-01
DE2505837A1 (de) 1975-09-25
BE826007A (fr) 1975-06-16
JPS50120880A (enExample) 1975-09-22
NL168333C (nl) 1982-03-16
JPS5639417B2 (enExample) 1981-09-12
ZA75616B (en) 1976-01-28
AU7808275A (en) 1976-08-12
FR2262835B1 (enExample) 1979-06-08
DE2505837B2 (de) 1978-11-16
NL7502387A (nl) 1975-09-03
FR2262835A1 (enExample) 1975-09-26

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee