GB804724A - Improvements in or relating to devices for measuring pressures - Google Patents
Improvements in or relating to devices for measuring pressuresInfo
- Publication number
- GB804724A GB804724A GB14722/56A GB1472256A GB804724A GB 804724 A GB804724 A GB 804724A GB 14722/56 A GB14722/56 A GB 14722/56A GB 1472256 A GB1472256 A GB 1472256A GB 804724 A GB804724 A GB 804724A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electrode
- central
- voltage
- displacement
- fed
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/12—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in capacitance, i.e. electric circuits therefor
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
804,724. Electric indicating systems. PHILIPS ELECTRICAL INDUSTRIES, Ltd. May 11, 1956 [May 16, 1955], No. 14722/56. Class 40 (1). Apparatus for measuring the pressure applied to the central, movable electrode of a differential capacitor comprises means for obtaining an A.C. voltage proportional to the displacement, which is rectified and fed back to the fixed electrodes to produce a force on the moving electrode to bring it back to its zero position. As shown, displacement of the central, movable electrode of differential capacitor 1, whose fixed electrodes are fed with A.C. from an oscillator 2, by a pressure to be measured produces a P.D. between points 3, 4 which is amplified at 5 and rectified at 6 to give a D.C. voltage indicated on meter 12 whose magnitude and polarity are indicative of the extent and direction of movement of the central electrode of capacitor 1. The fixed electrodes are also fed with equal values of this D.C. voltage but of opposite polarity, biased by a battery 17, to produce a force on the moving electrode to oppose the pressure displacement and bring the central electrode back to its zero position. The measuring range is varied by altering the voltage of battery 17.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL804724X | 1955-05-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB804724A true GB804724A (en) | 1958-11-19 |
Family
ID=19836541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB14722/56A Expired GB804724A (en) | 1955-05-16 | 1956-05-11 | Improvements in or relating to devices for measuring pressures |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB804724A (en) |
-
1956
- 1956-05-11 GB GB14722/56A patent/GB804724A/en not_active Expired
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