GB1341940A - Aperture tube assembly for a particle study apparatus - Google Patents
Aperture tube assembly for a particle study apparatusInfo
- Publication number
- GB1341940A GB1341940A GB3881872A GB3881872A GB1341940A GB 1341940 A GB1341940 A GB 1341940A GB 3881872 A GB3881872 A GB 3881872A GB 3881872 A GB3881872 A GB 3881872A GB 1341940 A GB1341940 A GB 1341940A
- Authority
- GB
- United Kingdom
- Prior art keywords
- turret
- aperture
- tubes
- aug
- arms
- 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 3
- 230000006835 compression Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 abstract 1
- 239000012530 fluid Substances 0.000 abstract 1
- 238000011010 flushing procedure Methods 0.000 abstract 1
- 230000013011 mating Effects 0.000 abstract 1
- 238000012544 monitoring process Methods 0.000 abstract 1
- 230000003287 optical effect Effects 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
-
- 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
- G01N15/134—Devices using two or more apertures
Landscapes
- 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)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Sampling And Sample Adjustment (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Abstract
1341940 Particle analysis COULTER ELECTRONICS Ltd 21 Aug 1972 [23 Aug 1971 12 April 1972] 38818/72 Heading G1N A Coulter-type particle analyser is provided with a rotatable turret carrying a plurality of aperture tubes, (preferably with different sized apertures), and the rotary turret mounting acts as a cock to connect only one tube to the measuring system. As shown (Fig. 4) the turret with two arms 52, 54 is urged upwardly by compression spring 40 to mate with the conical surface of a housing 30 and port 35 connects the arm 54 to the fluid system. Aperture tubes 46, 48 with conical mating surfaces are detachably held to the turret arms by springs 47, 49, in known manner. Flexible tubes 76, 78 connect to the rapid-filling and flushing cock (14) Fig. 1 (not shown). An alternative turret arrangement with 3 aperture tubes is illustrated in Fig. 6. Alternative details (i) the turret may be connected to existing apparatus by an 'S' bend to provide sufficient stand-off space from the back board Fig. 2 (not shown) and (ii) a connection (90) may be provided when a concentric "rapidfill" pipe exists; (iii) electrodes may be provided in the aperture tubes to reduce internal resistance Fig. 3 (not shown); (iv) optical monitoring of the aperture may be provided in known manner Fig. 5 (not shown).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US17398871A | 1971-08-23 | 1971-08-23 | |
| US24326972A | 1972-04-12 | 1972-04-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1341940A true GB1341940A (en) | 1973-12-25 |
Family
ID=26869755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3881872A Expired GB1341940A (en) | 1971-08-23 | 1972-08-21 | Aperture tube assembly for a particle study apparatus |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPS535833B2 (en) |
| AU (1) | AU460302B2 (en) |
| DE (1) | DE2241080A1 (en) |
| FR (1) | FR2151323A5 (en) |
| GB (1) | GB1341940A (en) |
| IT (1) | IT962170B (en) |
| NL (1) | NL7210912A (en) |
| SE (1) | SE379855B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2148510A (en) * | 1983-08-05 | 1985-05-30 | Orbec Ltd | Apparatus for detecting the presence of microorganisms in liquid |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2758107C2 (en) * | 1977-12-24 | 1982-07-15 | Bayer Ag, 5090 Leverkusen | Thiazoldiazacyanine dyes, processes for their preparation and their use |
-
1972
- 1972-08-10 NL NL7210912A patent/NL7210912A/xx not_active Application Discontinuation
- 1972-08-21 DE DE2241080A patent/DE2241080A1/en not_active Withdrawn
- 1972-08-21 AU AU45802/72A patent/AU460302B2/en not_active Expired
- 1972-08-21 FR FR7229784A patent/FR2151323A5/fr not_active Expired
- 1972-08-21 GB GB3881872A patent/GB1341940A/en not_active Expired
- 1972-08-21 IT IT52273/72A patent/IT962170B/en active
- 1972-08-21 SE SE7210852A patent/SE379855B/xx unknown
- 1972-08-21 JP JP8287572A patent/JPS535833B2/ja not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2148510A (en) * | 1983-08-05 | 1985-05-30 | Orbec Ltd | Apparatus for detecting the presence of microorganisms in liquid |
Also Published As
| Publication number | Publication date |
|---|---|
| IT962170B (en) | 1973-12-20 |
| FR2151323A5 (en) | 1973-04-13 |
| JPS535833B2 (en) | 1978-03-02 |
| NL7210912A (en) | 1973-02-27 |
| AU4580272A (en) | 1974-02-28 |
| DE2241080A1 (en) | 1973-03-15 |
| AU460302B2 (en) | 1975-04-24 |
| SE379855B (en) | 1975-10-20 |
| JPS4830990A (en) | 1973-04-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |