EP0062042A1 - Manometre-micromanometre superficiel a balancier - Google Patents
Manometre-micromanometre superficiel a balancierInfo
- Publication number
- EP0062042A1 EP0062042A1 EP19810902626 EP81902626A EP0062042A1 EP 0062042 A1 EP0062042 A1 EP 0062042A1 EP 19810902626 EP19810902626 EP 19810902626 EP 81902626 A EP81902626 A EP 81902626A EP 0062042 A1 EP0062042 A1 EP 0062042A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pendulum
- manometer
- micromanometer
- balance
- surface pressure
- 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.)
- Withdrawn
Links
- 230000004888 barrier function Effects 0.000 claims abstract description 7
- 238000006073 displacement reaction Methods 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 229920005372 Plexiglas® Polymers 0.000 claims description 2
- 238000005259 measurement Methods 0.000 claims description 2
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims 1
- 239000012188 paraffin wax Substances 0.000 claims 1
- 239000007864 aqueous solution Substances 0.000 abstract description 3
- 238000009530 blood pressure measurement Methods 0.000 abstract description 3
- 239000004094 surface-active agent Substances 0.000 abstract description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 229920005615 natural polymer Polymers 0.000 description 1
- 150000003904 phospholipids Chemical class 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920001059 synthetic polymer Polymers 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
- G01N13/02—Investigating surface tension of liquids
Definitions
- MANOMETER - SURFACE MICROMANOMETER WITH BALANCE MANOMETER - SURFACE MICROMANOMETER WITH BALANCE.
- amphiphilic substances such as fatty acids with a long carbon chain or their salts, phospholipids, natural or synthetic polymers, can be spread out in a monomolecular layer on the surface of the water.
- a large number of properties of surface films can be deduced from the study of the variation of surface pressure, as a function of the average area occupied by each molecule at the surface of water.
- the present invention relates to a "surface manometer-micromanometer", an apparatus which automatically records the curves of variation of the surface pressure as a function of the molecular area.
- This recording superficial manometer-micromanometer has a system for measuring the surface pressure which comprises a pendulum balanced on two very fine points.
- the force opposing the surface pressure is the weight of the pendulum.
- the balance is coupled to a displacement sensor of a particular type which operates without mechanical contact with the balance.
- the result is an extremely sensitive and faithful measurement system due to the almost total absence of inertia and friction.
- the device is provided with several interchangeable pendulums of different weights, which makes it possible to work in a very wide range of pressures, including manometry and micromanometry.
- FIG. i of the appended drawings represents an overall view of the pendulum recording manometer-micromanometer.
- FIG. 2 represents the surface pressure measurement system which is the subject of the present invention.
- a floating barrier 3 on which the pressure of the surface film is exerted is connected to the frame by two very flexible floating wires 4 and 5 circular curls format on the surface of the water.
- the surface film is spread in the superficially sealed compartment A, delimited on the right by the barrier-wire assembly 3,4,5, on the left by a movable strip 6, usually called "piston", resting on the frame by its ends and having its middle part in contact with the aqueous surface.
- the piston can advance parallel to the small c ⁇ tés of the frame, moved by the arm 7 to which it is connected by two vertical rods which are housed in the corresponding holes of the piston.
- the arm is set in motion by a system comprising two pulleys 8, 9, a cable 30 and an electric motor 11.
- the rotary potentiometer 12, whose axis is integral with that of the pulley 9, is connected to its power supply and to channel X of an XY plotter via wires 13, which makes it possible to record the advance of the piston and consequently the molecular area of the surface film.
- the surface pressure measurement system which is the subject of the present invention, is shown in Figure 1, and reproduced separately in Figure 2.
- a stainless steel rocker arm B composed of three parallel and coplanar rods 14, 15, 16 welded at right angles respectively to the ends and in the middle of the rod 17.
- a weight 18 On the rod 16 is fixed a weight 18 whose value depends on the range of surface pressure to be measured.
- two fine points 19, 20, parallel to rods 14 and 15, have been welded symmetrically on either side of rod 16.
- the rod 21 In the middle of rod 17, perpendicular to it and to rod 16, is welded the rod 21 which carries a durai pad 22 and a counterweight 23.
- the pendulum is balanced on the horizontal bridge 24, via the points 19, 20 which are housed in two recesses made on the bridge.
- the rods 14, 15, 16 pass through the corresponding holes drilled in the bridge and the ends of the rods 14, 15 are housed in two holes drilled in the barrier 3.
- the pendulum tilts, and the patch 22 moves away from the sensor by a distance (maximum 0.5 mm) proportional to the pressure.
- the electrical signal, proportional, is received on the Y channel of the XY plotter.
- the pendulum manometer-micromanometer object of the invention, can be used in fundamental research laboratories, in the physicochemistry of surfaces, in the medical, pharmaceutical and biological fields. It can also be used in the industrial field for the development of new surfactant products, such as detergents for example.
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Measuring Fluid Pressure (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8021896A FR2492100A1 (fr) | 1980-10-14 | 1980-10-14 | Manometre-micromanometre superficiel a balancier |
| FR8021896 | 1980-10-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0062042A1 true EP0062042A1 (fr) | 1982-10-13 |
Family
ID=9246838
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19810902626 Withdrawn EP0062042A1 (fr) | 1980-10-14 | 1981-09-16 | Manometre-micromanometre superficiel a balancier |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0062042A1 (OSRAM) |
| FR (1) | FR2492100A1 (OSRAM) |
| WO (1) | WO1982001417A1 (OSRAM) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2635463A (en) * | 1947-07-08 | 1953-04-21 | Eastman Kodak Co | Apparatus for measuring and recording variable quantities |
| DE1211821B (de) * | 1964-10-10 | 1966-03-03 | Bayer Ag | Geraet zur Messung und Registrierung der Grenzflaecheneigenschaften von Fluessigkeiten |
-
1980
- 1980-10-14 FR FR8021896A patent/FR2492100A1/fr active Granted
-
1981
- 1981-09-16 EP EP19810902626 patent/EP0062042A1/fr not_active Withdrawn
- 1981-09-16 WO PCT/FR1981/000120 patent/WO1982001417A1/fr not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO8201417A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2492100A1 (fr) | 1982-04-16 |
| WO1982001417A1 (fr) | 1982-04-29 |
| FR2492100B1 (OSRAM) | 1984-09-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 19820527 |
|
| AK | Designated contracting states |
Designated state(s): CH DE GB |
|
| DET | De: translation of patent claims | ||
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 19841124 |