US2791697A - Particle counting apparatus - Google Patents

Particle counting apparatus Download PDF

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Publication number
US2791697A
US2791697A US418050A US41805054A US2791697A US 2791697 A US2791697 A US 2791697A US 418050 A US418050 A US 418050A US 41805054 A US41805054 A US 41805054A US 2791697 A US2791697 A US 2791697A
Authority
US
United States
Prior art keywords
particle
line
signal
valve
scanning
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 - Lifetime
Application number
US418050A
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English (en)
Inventor
Dell Hugh Alexander
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.)
US Philips Corp
North American Philips Co Inc
Original Assignee
US Philips Corp
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 US Philips Corp filed Critical US Philips Corp
Application granted granted Critical
Publication of US2791697A publication Critical patent/US2791697A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K21/00—Details of pulse counters or frequency dividers

Definitions

  • Figure 3 is a circuit diagram of a pulse limiter and shaper unit
  • Negative-going signals from the new signal indicator 12 are applied to the control grid of valve Vs which is initially in the conducting state the valve V7 being cut oil.
  • the multivibrator may be tripped -to its original stable condition by negative going signals applied to the control grid of valve Vr these signals being those derived'from the explore sync head 20.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)
  • Particle Accelerators (AREA)
US418050A 1953-03-23 1954-03-23 Particle counting apparatus Expired - Lifetime US2791697A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB7985/53A GB786885A (en) 1953-03-23 1953-03-23 Improvements in or relating to particle counting apparatus

Publications (1)

Publication Number Publication Date
US2791697A true US2791697A (en) 1957-05-07

Family

ID=9843551

Family Applications (1)

Application Number Title Priority Date Filing Date
US418050A Expired - Lifetime US2791697A (en) 1953-03-23 1954-03-23 Particle counting apparatus

Country Status (5)

Country Link
US (1) US2791697A (US07122603-20061017-C00294.png)
BE (1) BE527537A (US07122603-20061017-C00294.png)
DE (1) DE1039265B (US07122603-20061017-C00294.png)
FR (1) FR1099236A (US07122603-20061017-C00294.png)
GB (1) GB786885A (US07122603-20061017-C00294.png)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2891722A (en) * 1956-09-25 1959-06-23 Rank Cintel Ltd Apparatus for sizing objects
US2918216A (en) * 1956-08-31 1959-12-22 Rca Corp Particle counting apparatus
US2935619A (en) * 1954-12-29 1960-05-03 Ibm Data handling system
US2936953A (en) * 1956-09-13 1960-05-17 American Cyanamid Co Apparatus for extracting particle size data
US2948470A (en) * 1957-03-15 1960-08-09 Du Mont Allen B Lab Inc Particle counter
US2948469A (en) * 1955-08-08 1960-08-09 Coal Industry Patents Ltd Apparatus for counting particles
US2957104A (en) * 1956-12-18 1960-10-18 Richard M Roppel Analogue to digital converter
US2958464A (en) * 1953-06-26 1960-11-01 Bayer Ag Process of and apparatus for the automatic counting of particles of any size and shape
US3013467A (en) * 1957-11-07 1961-12-19 Minsky Marvin Microscopy apparatus
US3019972A (en) * 1954-11-30 1962-02-06 West Point Mfg Co Apparatus for counting neps
US3028501A (en) * 1959-06-01 1962-04-03 Rieter Joh Jacob & Cie Ag Method for measuring the volume or the weight of bodies having different size and irregularly passing through a channel or of accumulations of such bodies, particularly of fibre tufts
US3073521A (en) * 1957-04-04 1963-01-15 Francois Joseph Gerard V Bosch Method for electronic counting and device for the working thereof
US3173015A (en) * 1962-03-20 1965-03-09 Gkn Group Services Ltd Electronic outline follower and reject system
US4984073A (en) * 1954-12-24 1991-01-08 Lemelson Jerome H Methods and systems for scanning and inspecting images
US5119190A (en) * 1963-03-11 1992-06-02 Lemelson Jerome H Controlling systems and methods for scanning and inspecting images
US5144421A (en) * 1954-12-24 1992-09-01 Lemelson Jerome H Methods and apparatus for scanning objects and generating image information
US5283641A (en) * 1954-12-24 1994-02-01 Lemelson Jerome H Apparatus and methods for automated analysis

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2427319A (en) * 1945-01-12 1947-09-09 Rca Corp Beverage inspection machine
US2494441A (en) * 1948-07-28 1950-01-10 Rca Corp Method and apparatus for electronically determining particle size distribution

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE919268C (de) * 1950-05-04 1954-10-18 David William Gillings Verfahren und Einrichtung zum Zaehlen kleiner Teilchen, insbesondere fuer Kohlenstaub-Untersuchungen
BE509736A (US07122603-20061017-C00294.png) * 1951-03-06
BE512383A (US07122603-20061017-C00294.png) * 1951-06-27

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2427319A (en) * 1945-01-12 1947-09-09 Rca Corp Beverage inspection machine
US2494441A (en) * 1948-07-28 1950-01-10 Rca Corp Method and apparatus for electronically determining particle size distribution

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2958464A (en) * 1953-06-26 1960-11-01 Bayer Ag Process of and apparatus for the automatic counting of particles of any size and shape
US3019972A (en) * 1954-11-30 1962-02-06 West Point Mfg Co Apparatus for counting neps
US5144421A (en) * 1954-12-24 1992-09-01 Lemelson Jerome H Methods and apparatus for scanning objects and generating image information
US4984073A (en) * 1954-12-24 1991-01-08 Lemelson Jerome H Methods and systems for scanning and inspecting images
US5283641A (en) * 1954-12-24 1994-02-01 Lemelson Jerome H Apparatus and methods for automated analysis
US5351078A (en) * 1954-12-24 1994-09-27 Lemelson Medical, Education & Research Foundation Limited Partnership Apparatus and methods for automated observation of objects
US2935619A (en) * 1954-12-29 1960-05-03 Ibm Data handling system
US2948469A (en) * 1955-08-08 1960-08-09 Coal Industry Patents Ltd Apparatus for counting particles
US2918216A (en) * 1956-08-31 1959-12-22 Rca Corp Particle counting apparatus
US2936953A (en) * 1956-09-13 1960-05-17 American Cyanamid Co Apparatus for extracting particle size data
US2891722A (en) * 1956-09-25 1959-06-23 Rank Cintel Ltd Apparatus for sizing objects
US2957104A (en) * 1956-12-18 1960-10-18 Richard M Roppel Analogue to digital converter
US2948470A (en) * 1957-03-15 1960-08-09 Du Mont Allen B Lab Inc Particle counter
US3073521A (en) * 1957-04-04 1963-01-15 Francois Joseph Gerard V Bosch Method for electronic counting and device for the working thereof
US3013467A (en) * 1957-11-07 1961-12-19 Minsky Marvin Microscopy apparatus
US3028501A (en) * 1959-06-01 1962-04-03 Rieter Joh Jacob & Cie Ag Method for measuring the volume or the weight of bodies having different size and irregularly passing through a channel or of accumulations of such bodies, particularly of fibre tufts
US3173015A (en) * 1962-03-20 1965-03-09 Gkn Group Services Ltd Electronic outline follower and reject system
US5119190A (en) * 1963-03-11 1992-06-02 Lemelson Jerome H Controlling systems and methods for scanning and inspecting images

Also Published As

Publication number Publication date
GB786885A (en) 1957-11-27
BE527537A (US07122603-20061017-C00294.png)
DE1039265B (de) 1958-09-18
FR1099236A (fr) 1955-08-31

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