JPS56118633A - Method and apparatus for measuring suction pressure - Google Patents
Method and apparatus for measuring suction pressureInfo
- Publication number
- JPS56118633A JPS56118633A JP2235980A JP2235980A JPS56118633A JP S56118633 A JPS56118633 A JP S56118633A JP 2235980 A JP2235980 A JP 2235980A JP 2235980 A JP2235980 A JP 2235980A JP S56118633 A JPS56118633 A JP S56118633A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- mouthpiece
- thin tube
- measuring
- measuring thin
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L7/00—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements
- G01L7/18—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements using liquid as the pressure-sensitive medium, e.g. liquid-column gauges
- G01L7/182—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements using liquid as the pressure-sensitive medium, e.g. liquid-column gauges constructional details, e.g. mounting
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
PURPOSE:To enable the suction pressure to be readily measured with a simple constitution by a method wherein the pressure in the measuring thin tube is made negative by sucking from a mouthpiece, after the suction the mouthpiece is opened, and the pressure water head having risen in the measuring thin tube is measured. CONSTITUTION:The measuring instrument consists of a liquid container 2 communicating with the atmosphere through only a mouthpiece 1 and a measuring thin tube 6. Accordingly, with a resetting small hole 9 closed with a finger 10, making an infant suck at the mouthpiece 1 causes the pressure in the liquid container 2 to become negative. Consequently, the air in the measuring thin tube 6 expands to flow out from the lower opening end 4 as bubbles. Then, when there is no more bubbles produced during the suction, removing the infant from the mouthpiece 1 causes the air to flow back into the liquid container 2 through the mouthpiece 1 and press down the surface of a liquid 3. Consequently, a portion of the liquid 3 rises in the measuring thin tube 6 and appears as a pressure water head 7 at the postion where the pressure in the measuring thin tube 6 balances with the atmospheric pressure, and the pressure water head 7 is read on a measuring graduation portion 5. Thereby the suction pressure can be readily measured with a simple constitution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2235980A JPS56118633A (en) | 1980-02-25 | 1980-02-25 | Method and apparatus for measuring suction pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2235980A JPS56118633A (en) | 1980-02-25 | 1980-02-25 | Method and apparatus for measuring suction pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS56118633A true JPS56118633A (en) | 1981-09-17 |
Family
ID=12080433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2235980A Pending JPS56118633A (en) | 1980-02-25 | 1980-02-25 | Method and apparatus for measuring suction pressure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56118633A (en) |
-
1980
- 1980-02-25 JP JP2235980A patent/JPS56118633A/en active Pending
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