US3844413A - Particle size distribution analyser - Google Patents

Particle size distribution analyser Download PDF

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Publication number
US3844413A
US3844413A US00366688A US36668873A US3844413A US 3844413 A US3844413 A US 3844413A US 00366688 A US00366688 A US 00366688A US 36668873 A US36668873 A US 36668873A US 3844413 A US3844413 A US 3844413A
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US
United States
Prior art keywords
cup member
shaft
side walls
particles
size distribution
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
US00366688A
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English (en)
Inventor
T Mizushima
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Tokyo Research Service KK
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Tokyo Research Service KK
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Filing date
Publication date
Application filed by Tokyo Research Service KK filed Critical Tokyo Research Service KK
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    • 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
    • G01N15/04—Investigating sedimentation of particle suspensions

Definitions

  • ABSTRACT A device for analysing the particle size distribution of (gill. 209/20gb'37g/g/ld3 very Small particles Such as sand, etc" from a given [58] Fieid 210/83 quantity of water of river or sea by precipitation onto E 73/6l 432 a receiving plate rotating at a very .low speed in a body of water, larger particles descending earlier than [56] R f n Cit d smaller ones, whereby the particles of different sizes e e are separately precipitated onto the receiving plate UNITED STATES PATENTS and collected according to size distribution.
  • a known automatic particle size measuring device includes a water vessel in which a balance is provided to measure particles stirred up and descended onto a receiving dish, thereby measuring the distribution of the particle size, based upon the amount of particles precipitated in a determined time.
  • Such a device requires a relatively large amount of samples to operate satisfactorily.
  • such a device can analyze distribution of particles sizes but since the particles precipitated on the balancedish are not sorted according to the sizes thereof, it is not known what sized particles are contained in the samples in what percentage.
  • It is the object of this invention is to provide a device having an easy-operable and simplestructure to accurately analyze, sort and measure particles even with a small amount of samples.
  • the device comprises a transparent water vessel, a top sealing cover, a shaft perpendicularly passing through said cover and rotatably carried by said cover, an horological mechanism to drive said shaft, a first inserted cap member having two concentric side walls and fixed to said shaft to be co-rotatable therewith, a second cup member having two concentric side walls adapted to receive said two concentric side walls of saidfirst cup member, said second cup member being carried by said shaft to be adjustable of its position along said shaft. and an annular dish mounted in said in said second cup member in an annular space defined the two concentric side walls thereof, said first cup member having a sample inlet port opening to said, annular space.
  • FIG. I is a longitudinal section of an embodiment of the device according to this invention.
  • FIGS. 2 and 3 are plan views of two examples of the annular dishes to be incorporated in the device as shown in FIG. 1.
  • a water vessel I made of a transparent synthetic resin or glass having feet 2 is equipped with a top cover 3 sealing the upper opening of said vessel, and a rotary shaft 4 is perpendicularly passing through the cover 3 at the center of the vessel 1.
  • the rotary shaft 4 is abutting against the bottom of the vessel I at the lower-most end thereof where it is conically shaped and is carried at its upper portion by rollers 6 of a bearing 5 provided at the cover 3.
  • the shaft 4 is in turn carrying a gear 7 at its upper end portion, which is in meshing engagement with a gear 8 of an horological mechanism 9 to be driven by the mechanism.
  • An upper end plate 11a of a first cup member 10 is fixed to the rotary shaft 4 and inner and outer cylindrical side walls 11b, 11c integrally connected with the end plate 11a extend downward therefrom.
  • the end plate 11a is provided with a funnel shaped sample inlet port 12.
  • a second cup member 13 includes a bottom plate 14a through which the rotary shaft 4 passes in a manner to permit axial movement therebetween.
  • Side walls 14b, of the second cup member 13 receive therebetween the side walls l lb, llc of the first cup member 10, thereby defining an annular space closed at upper and lower ends thereof.
  • the bottom plate 14a is provided with several draining holes 15 opening in the region of the annular space.
  • An annular receiving dish 16 is placed at the bottom of the annular space to fit the side walls 14b, 14c.
  • the receiving dish 16 may, for example, be of the shapes in FIGS. 2 and 3.
  • the receiving dish 16 shown in FIG. 2 is used to analyse and sort. particles of diameter d in the range of 0.005 d 0.05mm.
  • the annular dish is divided by partitions 17 to provide separate receiver sections A, B. C, and D on the receiving dish 16.
  • the receiving dish 16 shown in FIG. 3 provides receiver sections E and F adapted to sort particles two parts of d 0.005mm and d 0.005.
  • the bottom plate 14a of the second cup member 13 is provided with a stopper 18 to adljustably mount the second cup member 13 to the shaft 4 with respect to its height.
  • the shaft 4 is provided with centimetric measuring marks 19 at the lower end portion thereof for the convenience of adjusting the height of the second cup member. Said centimetric measuring marks 19 is conversely marked from up to down to give the height h from the inlet point of the sample introduced through the inlet port 12 to the bottom of the receiving dish 16.
  • the particles to be sorted in the receiver sections A, B, C, and D of the receiving dish 16 are within the range of 0.005 d 0.05mm particle size as mentioned above.
  • the descending speed (cm/sec) of the particles varies according to water temperature and specific gravity of the particles and as a result of experiments, the inventor has obtained the data as shown in Table I.
  • Table I. Descending speed (cm/sec) of the Particles in ewmn Thus, assuming conditions that the descending height h is 20cm and the water temperature is 15C, a particle having diameter of 0.05 mm and specific weight 2.65
  • the sorting device is of descending and precipitating type wherein the samples are dropped in the still water thereby analyzing the particles regardless the quantity of the samples, and since the samples descend perpendicularly in the water, the weight of the samples themselves is clearly distinguished whereby no differently-sized particles are mixed in a group of the particles precipitated on a funnel shaped section.
  • the device itself is operated with a simple mechanism and construction in such a manner that the receiving dish 16 is rotated with an horological gear through gears 9, 10, thereby allowing cheaper installation cost, wherein the height (h) of the receiving dish 16 is indicated on the given centimetric marks through the transparent vessel 1.
  • the transparent vessel there are obtained other features of permitting to check the descending and precipitating condition of the samples.
  • the device is used to analyze and sort the particle sizes of medicines and other materials which are not soluble.
  • the sorting device of this invention can be widely used in the industries for sorting and classifying particles.
  • a device for sorting and classifying very small particles comprising:
  • second cup member having two concentric side walls adapted to receive said two concentric side walls of said first cup member, said second cup member being carried by said shaft and including means for adjusting its position along said shaft, and
  • annular dish mounted in said second cup member in an annular spaced defined by the two concentric side walls thereof, said first cup member having a sample inlet port opening to said annular space.

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  • Chemical & Material Sciences (AREA)
  • Biochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
US00366688A 1972-07-26 1973-06-04 Particle size distribution analyser Expired - Lifetime US3844413A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP47074765A JPS4934391A (it) 1972-07-26 1972-07-26

Publications (1)

Publication Number Publication Date
US3844413A true US3844413A (en) 1974-10-29

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ID=13556689

Family Applications (1)

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US00366688A Expired - Lifetime US3844413A (en) 1972-07-26 1973-06-04 Particle size distribution analyser

Country Status (7)

Country Link
US (1) US3844413A (it)
JP (1) JPS4934391A (it)
CA (1) CA1003787A (it)
DE (1) DE2336318A1 (it)
FR (1) FR2193974B1 (it)
GB (1) GB1396231A (it)
IT (1) IT993605B (it)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5834642A (en) * 1997-07-25 1998-11-10 International Business Machines Corporation Downstream monitor for CMP brush cleaners

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4178197A (en) * 1979-03-05 1979-12-11 International Business Machines Corporation Formation of epitaxial tunnels utilizing oriented growth techniques

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1046447A (en) * 1909-11-01 1912-12-10 George R Delamater Apparatus for separating materials of different specific gravity.
US2702122A (en) * 1948-08-17 1955-02-15 Nathan E Joaquin Process and apparatus for separating materials
US2887227A (en) * 1955-12-27 1959-05-19 Gen Electric Dust particle counting apparatus
US3222925A (en) * 1959-06-25 1965-12-14 Robert D Kracke Apparatus for the classification and evaluation of fallout from aerosols
US3405548A (en) * 1965-01-19 1968-10-15 Samartzopoulos Costas George Apparatus and method for analysing liquid sprays
FR2053448A5 (en) * 1969-07-04 1971-04-16 Commissariat Energie Atomique Particle size classification by sedimentation

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1046447A (en) * 1909-11-01 1912-12-10 George R Delamater Apparatus for separating materials of different specific gravity.
US2702122A (en) * 1948-08-17 1955-02-15 Nathan E Joaquin Process and apparatus for separating materials
US2887227A (en) * 1955-12-27 1959-05-19 Gen Electric Dust particle counting apparatus
US3222925A (en) * 1959-06-25 1965-12-14 Robert D Kracke Apparatus for the classification and evaluation of fallout from aerosols
US3405548A (en) * 1965-01-19 1968-10-15 Samartzopoulos Costas George Apparatus and method for analysing liquid sprays
FR2053448A5 (en) * 1969-07-04 1971-04-16 Commissariat Energie Atomique Particle size classification by sedimentation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5834642A (en) * 1997-07-25 1998-11-10 International Business Machines Corporation Downstream monitor for CMP brush cleaners
US5974868A (en) * 1997-07-25 1999-11-02 International Business Machines Corporation Downstream monitor for CMP brush cleaners

Also Published As

Publication number Publication date
FR2193974B1 (it) 1974-11-08
GB1396231A (en) 1975-06-04
IT993605B (it) 1975-09-30
FR2193974A1 (it) 1974-02-22
DE2336318A1 (de) 1974-02-14
AU5826873A (en) 1975-01-30
JPS4934391A (it) 1974-03-29
CA1003787A (en) 1977-01-18

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