GB1459869A - Circuit arrangement for determining deposits in or at a measure ment aperture of equipment for the granulometric determination of particles suspended in an electrolytic liquid - Google Patents
Circuit arrangement for determining deposits in or at a measure ment aperture of equipment for the granulometric determination of particles suspended in an electrolytic liquidInfo
- Publication number
- GB1459869A GB1459869A GB483974A GB483974A GB1459869A GB 1459869 A GB1459869 A GB 1459869A GB 483974 A GB483974 A GB 483974A GB 483974 A GB483974 A GB 483974A GB 1459869 A GB1459869 A GB 1459869A
- Authority
- GB
- United Kingdom
- Prior art keywords
- aperture
- filter
- blocked
- granulometric
- determination
- 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
- 239000007788 liquid Substances 0.000 title 1
- 238000005259 measurement Methods 0.000 title 1
- 238000012544 monitoring process Methods 0.000 abstract 2
- 230000003111 delayed effect Effects 0.000 abstract 1
- 238000007599 discharging Methods 0.000 abstract 1
- 239000006194 liquid suspension Substances 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
Classifications
-
- G01N15/132—
Abstract
1459869 Particle analysis systems KOMBINAT MEDIZIN-UND-LABORTECHNIK VEB 1 Feb 1974 [2 Feb 1973] 04839/74 Heading G1N In aperture type apparatus for the analysis of particles in a liquid suspension a monitoring circuit is provided to detect and clear a blocked aperture. The monitoring circuit comprises a first low-pass "ripple filter" to remove particle pulses. The signal is then fed through an attenuator 10 and a further long-time-constant low pass filter 8 to the respective inputs of a differential amplifier 11. A sudden change in D.C. level due to a blocked or partially blocked aperture provides a differential input due to the delayed response of the filter 8. This operates relay 13 to disconnect the filter input at 9; energize (i) indicator 15; (ii) device 16 to stop the measuring counter 6; and (iii) device 17 to clear the aperture. In a modification Fig. 2 (not shown) (i) contact 9 may be a change-over contact to connect a discharging bias to the filter 8 and (ii) the relay 13 may be de-energized by a timer contact controlling an automatic analysis apparatus.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DD168626A DD102215A1 (en) | 1973-02-02 | 1973-02-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1459869A true GB1459869A (en) | 1976-12-31 |
Family
ID=5489957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB483974A Expired GB1459869A (en) | 1973-02-02 | 1974-02-01 | Circuit arrangement for determining deposits in or at a measure ment aperture of equipment for the granulometric determination of particles suspended in an electrolytic liquid |
Country Status (6)
| Country | Link |
|---|---|
| CS (1) | CS176485B1 (en) |
| DD (1) | DD102215A1 (en) |
| DE (1) | DE2401041A1 (en) |
| GB (1) | GB1459869A (en) |
| HU (1) | HU170188B (en) |
| SE (1) | SE388939B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2337600A (en) * | 1996-11-20 | 1999-11-24 | Microbial Systems Ltd | Particle sizing apparatus |
| GB2319618B (en) * | 1996-11-20 | 2000-08-23 | Microbial Systems Ltd | Particle sizing apparatus |
| US6418802B1 (en) * | 1996-11-21 | 2002-07-16 | Michael Anthony Wood | Particle sizing apparatus and method of use thereof |
-
1973
- 1973-02-02 DD DD168626A patent/DD102215A1/xx unknown
-
1974
- 1974-01-10 DE DE2401041A patent/DE2401041A1/en not_active Withdrawn
- 1974-01-21 HU HUME1698A patent/HU170188B/hu unknown
- 1974-01-30 CS CS623A patent/CS176485B1/cs unknown
- 1974-02-01 GB GB483974A patent/GB1459869A/en not_active Expired
- 1974-02-01 SE SE7401355A patent/SE388939B/en unknown
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2337600A (en) * | 1996-11-20 | 1999-11-24 | Microbial Systems Ltd | Particle sizing apparatus |
| GB2337600B (en) * | 1996-11-20 | 2000-08-16 | Microbial Systems Ltd | Particle sizing apparatus |
| GB2319618B (en) * | 1996-11-20 | 2000-08-23 | Microbial Systems Ltd | Particle sizing apparatus |
| US6389912B1 (en) | 1996-11-20 | 2002-05-21 | Michael Anthony Wood | Particle sizing apparatus and method of use thereof |
| US6418802B1 (en) * | 1996-11-21 | 2002-07-16 | Michael Anthony Wood | Particle sizing apparatus and method of use thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| HU170188B (en) | 1977-04-28 |
| SE388939B (en) | 1976-10-18 |
| DE2401041A1 (en) | 1974-08-08 |
| DD102215A1 (en) | 1973-12-12 |
| CS176485B1 (en) | 1977-06-30 |
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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 |