GB980206A - Improvements in and relating to apparatus for studying the physical properties of particles - Google Patents
Improvements in and relating to apparatus for studying the physical properties of particlesInfo
- Publication number
- GB980206A GB980206A GB33604/62A GB3360462A GB980206A GB 980206 A GB980206 A GB 980206A GB 33604/62 A GB33604/62 A GB 33604/62A GB 3360462 A GB3360462 A GB 3360462A GB 980206 A GB980206 A GB 980206A
- Authority
- GB
- United Kingdom
- Prior art keywords
- contact
- aperture
- particles
- conductive fluid
- specifications
- 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
Links
- 239000002245 particle Substances 0.000 title abstract 4
- 230000000704 physical effect Effects 0.000 title 1
- 239000012530 fluid Substances 0.000 abstract 3
- 238000004513 sizing Methods 0.000 abstract 2
- 239000006194 liquid suspension Substances 0.000 abstract 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 abstract 1
- 229910052753 mercury Inorganic materials 0.000 abstract 1
- 239000000725 suspension Substances 0.000 abstract 1
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
- G01N15/131—Details
- G01N15/132—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
- G01N2015/135—Electrodes
- G01N2015/136—Scanning electrodes
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)
- Measuring Fluid Pressure (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
980, 206. Counting and sizing particles. COULTER ELECTRONICS Ltd. Aug. 31, 1962 [Sept. 20, 1961], No. 33604/62. Heading G1N. In an arrangement for counting and sizing particles in a liquid suspension wherein a predetermined volume of the suspension is drawn through a metering aperture to effect, in the presence of particles, a change of impedance between two electrodes 66, 74 spaced one on each side of the aperture, and the predetermined volume is drawn through by a metering device 60 including an insulative conduit 88 through which a conductive fluid 84 flows between a pair of contacts 90, 91 arranged to start and stop the counter when contacted by the conductive fluid as described in Specifications 927,346 and 865,069, an additional contact 92 is included in the conduit, to be engaged by the conductive fluid shortly after contact with the second contact whereby the aperture is short circuited to prevent the flow of current therethrough. The stop contact connections are arranged so that the preamplifier and/or subsequent stages may be described. Earthing of contact 91 by the mercury, drops the potential at the junction of resistor R18 with diode V7 and cuts off valve section V8B. Subsequent contact with contact 92 short circuits the two electrodes 66, 74 and prevents the flow of current through the aperture. Specifications 722,418 and 865,070 also are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US13951661A | 1961-09-20 | 1961-09-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB980206A true GB980206A (en) | 1965-01-13 |
Family
ID=22487040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB33604/62A Expired GB980206A (en) | 1961-09-20 | 1962-08-31 | Improvements in and relating to apparatus for studying the physical properties of particles |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE1297346B (en) |
| GB (1) | GB980206A (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2656508A (en) * | 1949-08-27 | 1953-10-20 | Wallace H Coulter | Means for counting particles suspended in a fluid |
-
1962
- 1962-08-31 GB GB33604/62A patent/GB980206A/en not_active Expired
- 1962-09-19 DE DEC27972A patent/DE1297346B/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| DE1297346B (en) | 1969-06-12 |
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