DE237247C - - Google Patents
Info
- Publication number
- DE237247C DE237247C DENDAT237247D DE237247DA DE237247C DE 237247 C DE237247 C DE 237247C DE NDAT237247 D DENDAT237247 D DE NDAT237247D DE 237247D A DE237247D A DE 237247DA DE 237247 C DE237247 C DE 237247C
- Authority
- DE
- Germany
- Prior art keywords
- measuring
- liquid
- manometer
- contact tip
- carried out
- 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.)
- Active
Links
- 239000007788 liquid Substances 0.000 claims description 10
- 238000005259 measurement Methods 0.000 description 6
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
Description
KAISERLICHESIMPERIAL
PATENTAMT.PATENT OFFICE.
Die genaue Messung sehr geringer Drücke durch direkte Ablesung der Höhenunterschiede der Flüssigkeitsspiegel an einem Flüssigkeitsmanometer begegnet erheblichen Schwierigkeiten, weil die direkte Ablesung an einem Maßstab mit bloßem Auge nicht genügend genau ist. Die augenfällige und leicht kontrollierbare direkte Höhenmessung ist aber in zahlreichen Fällen der Meßpraxis unbedingtes Erfordernis,The exact measurement of very low pressures through direct reading of the height differences the liquid level on a liquid manometer encounters considerable difficulties, because direct reading on a scale with the naked eye is not accurate enough. The eye-catching and easily controllable one Direct height measurement is, however, an absolute requirement in many cases of measurement practice,
ίο und es ist vielfach nicht möglich, die bekannten Hilfsmittel der geneigten Meßröhre und anderen Methoden zur Vergrößerung des sichtbaren Ausschlages anzuwenden.ίο and it is often not possible to use the known Aids of the inclined measuring tube and other methods to enlarge the visible To apply the deflection.
Gegenüber den gebräuchlichen, unter dem Namen Mikromanometer bekannten Feinmeßinstrumenten zeigt der neue, ebenfalls auf hydrostatischem Prinzip beruhende Apparat gemäß der Erfindung folgende Unterschiede:Compared to the customary precision measuring instruments known under the name of micromanometers the new apparatus according to the invention, also based on the hydrostatic principle, shows the following differences:
1. Als Meßsperrflüssigkeit wird gewöhnliches Wasser verwendet, während bisher gefärbter Alkohol von ganz bestimmtem spezifischen Gewicht anzuwenden ist, genau demselben, welches bei der Eichung angewandt wurde. Damit war also bisher eirie Erschwerung des Gebrauches verbunden.1. Ordinary water is used as the measuring barrier liquid, while previously colored water Alcohol of a certain specific gravity is to be used, exactly the same which was used in the calibration. This has hitherto made use more difficult tied together.
2. Die Eichung der bekannten Instrumente läßt sich nur imLaboratorium einwandfrei vornehmen, ist sehr zeitraubend und nur mit Hilfe feinster Meßgeräte ausführbar, weil das etwa 200 mm lange Glasmeßrohr auf die ganze Teilungslänge weder in der Längsrichtung mathematisch gerade noch im Querschnitt gleich weit hergestellt werden kann.2. The calibration of the known instruments can only be carried out properly in the laboratory, is very time-consuming and can only be carried out with the help of the finest measuring devices, because this is around 200 mm long glass measuring tube on the entire pitch length neither in the longitudinal direction mathematically can just about be made the same cross-section.
3. Um die Messungen über einen größeren ■ Meßbereich auszudehnen, sind von den bisher bekannten Apparaten mehrere Exemplare, erforderlich, deren Meßbereiche einander ergänzen, wenn man die Messung mit großer Genauigkeit ausführen will. Demgegenüber weist das neue Manometer z. B. einen Meßbereich von mindestens Y100 bis 25 mm W. S. für Druckmessungen und 0,5 bis 20 m pro Sekunde für Geschwindigkeitsmessungen auf. Von den bisher bekannten Instrumenten müßten hierfür wenigstens fünf verschiedene Apparate angewandt werden.3. In order to extend the measurements over a larger measuring range, several units of the previously known apparatus are required, the measuring ranges of which complement one another if the measurement is to be carried out with great accuracy. In contrast, the new manometer z. B. a measuring range of at least Y 100 to 25 mm WS for pressure measurements and 0.5 to 20 m per second for speed measurements. Of the previously known instruments, at least five different devices would have to be used for this.
4. Das neue Instrument ist nahezu unempfindlich, und erforderlich werdende Reparaturen können ohne Schwierigkeiten von jedem Mechaniker vorgenommen werden, weil eine empirische Eichung nicht erforderlich und ein Zerbrechen des aus Metall hergestellten Meßrohres fast ausgeschlossen ist. Diese Vorteile sind dadurch ermöglicht worden, daß an dem Flüssigkeitsmanometer eine mit elektrischer Kontaktspitze versehene Längenmeßvorrichtung angeordnet ist.4. The new instrument is almost insensitive and repairs become necessary can be carried out by any mechanic without difficulty because empirical calibration is not required and a Breaking of the measuring tube made of metal is almost impossible. These advantages have been made possible by the fact that on the liquid manometer with an electrical Contact tip provided length measuring device is arranged.
Der Apparat besteht in einer beispielsweisen Ausführungsform aus dem eigentlichen Flüssigkeitsmanometer a, dem Mikrometer b mit der daran befestigten Platinspitze c, der Stromquelle d und dem Signalinstrument (Galvanoskop) e. Der eine Pol der Stromquelle ist mit der Kontaktspitze, der andere mit der leitenden Flüssigkeit des Manometers in der Weise verbunden, daß durch die Berührung der Kontakt-In an exemplary embodiment, the apparatus consists of the actual liquid manometer a, the micrometer b with the platinum tip c attached, the power source d and the signal instrument (galvanoscope) e. One pole of the power source is connected to the contact tip, the other to the conductive liquid of the manometer in such a way that by touching the contact
spitze mit dem Flüssigkeitsspiegel der Stromkreis geschlossen, das Signalinstrument betätigt wird.tip with the liquid level, the circuit is closed, the signaling instrument is actuated will.
Ändert sich die Höhe des Flüssigkeitsspiegels beispielsweise unter der Einwirkung eines äußeren Luftdruckes und verschiebt man die Kontaktspitze, so wird durch Unterbrechung dieser Verschiebung im Augenblick der Wahrnehmung des Kontaktsignals die Differenz der Höhenlage des Flüssigkeitsspiegels mit Hilfe der 10 Mikrometerleitung meßbar bestimmt.If the height of the liquid level changes, for example under the influence of an external force Air pressure and if you move the contact tip, then this is interrupted Shift at the moment of perception of the contact signal is the difference in altitude of the liquid level determined measurably with the help of the 10 micrometer line.
Claims (1)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE237247C true DE237247C (en) |
Family
ID=496873
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT237247D Active DE237247C (en) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE237247C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2596352A (en) * | 1945-02-21 | 1952-05-13 | Eunice L Wuensch | Density responsive indicating and control device |
| US2757534A (en) * | 1953-09-15 | 1956-08-07 | Cabot Godfrey L Inc | Measurement of volumes |
| US3041879A (en) * | 1959-01-20 | 1962-07-03 | Mechanism Ltd | Pressure measuring devices |
-
0
- DE DENDAT237247D patent/DE237247C/de active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2596352A (en) * | 1945-02-21 | 1952-05-13 | Eunice L Wuensch | Density responsive indicating and control device |
| US2757534A (en) * | 1953-09-15 | 1956-08-07 | Cabot Godfrey L Inc | Measurement of volumes |
| US3041879A (en) * | 1959-01-20 | 1962-07-03 | Mechanism Ltd | Pressure measuring devices |
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