GB1492548A - Apparatus for the measurement of the specific surface of pulverised materials - Google Patents
Apparatus for the measurement of the specific surface of pulverised materialsInfo
- Publication number
- GB1492548A GB1492548A GB5541074A GB5541074A GB1492548A GB 1492548 A GB1492548 A GB 1492548A GB 5541074 A GB5541074 A GB 5541074A GB 5541074 A GB5541074 A GB 5541074A GB 1492548 A GB1492548 A GB 1492548A
- Authority
- GB
- United Kingdom
- Prior art keywords
- circuit
- specific surface
- measuring
- generator
- pulse generator
- 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
- 238000005259 measurement Methods 0.000 title 1
- 230000005484 gravity Effects 0.000 abstract 1
- 230000010355 oscillation 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
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/088—Investigating volume, surface area, size or distribution of pores; Porosimetry
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)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
- Crushing And Grinding (AREA)
Abstract
1492548 Measuring specific surface of pulverized materials VYZKUMNY USTAV STAVEBNICH HMOT 23 Dec 1974 [22 Dec 1973] 55410/74 Heading G1N Apparatus for measuring the specific surface P of a pulverized material comprises a sensor 6 for producing a signal of which the duration is representative of the time interval t required for the passage of a predetermined volume of air through a sample bed of the material, means 4 for measuring the temperature T of the sample bed, and a circuit for producing an output signal in accordance with the equation: where k 1 , k 2 , k 3 are constants and Q, V and γ are the mass, volume and specific gravity of the sample, the circuit comprising means such as potentiometers 2, 3 for setting the values of k 1 and γ, a pulse generator 5, and a circuit 7 for gating the pulses from generator 5, the frequency of the pulse generator 5 and the length of time during which the gating circuit 7 is open and the pulse generator is in oscillation being controlled such that the number of pulses produced at the output of the gating circuit is proportional to P or P<SP>2</SP>. The means 4, sensor 6 and potentiometers 2, 3 are connected to a circuit 1 which controls the frequency of generator 5. If the output of gate 7 represents P<SP>2</SP>, P may be derived by a square root device 8. Unit 9 may be used to calculate the mean of two consecutive values. Units 11, 12 and 13 are a store, a digital display and a digital to analogue converter respectively.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS895573A CS169200B1 (en) | 1973-12-22 | 1973-12-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1492548A true GB1492548A (en) | 1977-11-23 |
Family
ID=5440820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5541074A Expired GB1492548A (en) | 1973-12-22 | 1974-12-23 | Apparatus for the measurement of the specific surface of pulverised materials |
Country Status (13)
| Country | Link |
|---|---|
| JP (1) | JPS50115087A (en) |
| AT (1) | AT350819B (en) |
| BE (1) | BE823709A (en) |
| CA (1) | CA1017598A (en) |
| CH (1) | CH574599A5 (en) |
| CS (1) | CS169200B1 (en) |
| DE (1) | DE2459418A1 (en) |
| DK (1) | DK643174A (en) |
| ES (1) | ES433252A1 (en) |
| FR (1) | FR2255592B1 (en) |
| GB (1) | GB1492548A (en) |
| IT (1) | IT1027960B (en) |
| YU (1) | YU334974A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3225894A1 (en) * | 1982-07-10 | 1984-01-12 | Výzkumný ústav stavebních hmot, 61700 Brno | METHOD FOR DETERMINING THE SPECIFIC SURFACE OF POWDER-SHAPED SUBSTANCES AND DEVICE FOR IMPLEMENTING THE METHOD |
| DE8802341U1 (en) * | 1987-12-30 | 1988-04-14 | Heubach Engineering Gmbh, 3394 Langelsheim, De |
-
1973
- 1973-12-22 CS CS895573A patent/CS169200B1/cs unknown
-
1974
- 1974-12-10 AT AT984574A patent/AT350819B/en not_active IP Right Cessation
- 1974-12-11 DK DK643174A patent/DK643174A/da unknown
- 1974-12-11 CH CH1648674A patent/CH574599A5/xx not_active IP Right Cessation
- 1974-12-16 DE DE19742459418 patent/DE2459418A1/en not_active Withdrawn
- 1974-12-16 YU YU334974A patent/YU334974A/en unknown
- 1974-12-18 JP JP14549074A patent/JPS50115087A/ja active Pending
- 1974-12-20 BE BE151813A patent/BE823709A/en unknown
- 1974-12-20 CA CA216,844A patent/CA1017598A/en not_active Expired
- 1974-12-20 IT IT3091474A patent/IT1027960B/en active
- 1974-12-21 ES ES433252A patent/ES433252A1/en not_active Expired
- 1974-12-23 FR FR7442564A patent/FR2255592B1/fr not_active Expired
- 1974-12-23 GB GB5541074A patent/GB1492548A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| YU334974A (en) | 1982-02-28 |
| CS169200B1 (en) | 1976-07-29 |
| IT1027960B (en) | 1978-12-20 |
| DK643174A (en) | 1975-09-08 |
| ES433252A1 (en) | 1976-11-16 |
| CH574599A5 (en) | 1976-04-15 |
| AU7673374A (en) | 1976-06-24 |
| CA1017598A (en) | 1977-09-20 |
| ATA984574A (en) | 1978-11-15 |
| FR2255592A1 (en) | 1975-07-18 |
| DE2459418A1 (en) | 1975-07-03 |
| AT350819B (en) | 1979-06-25 |
| JPS50115087A (en) | 1975-09-09 |
| FR2255592B1 (en) | 1978-09-29 |
| BE823709A (en) | 1975-04-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |