GB1355338A - Atmospheric-pressure transducers - Google Patents
Atmospheric-pressure transducersInfo
- Publication number
- GB1355338A GB1355338A GB1355338DA GB1355338A GB 1355338 A GB1355338 A GB 1355338A GB 1355338D A GB1355338D A GB 1355338DA GB 1355338 A GB1355338 A GB 1355338A
- Authority
- GB
- United Kingdom
- Prior art keywords
- atmospheric pressure
- pressure
- capsule
- capacitors
- assembly
- 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
- G01L9/0082—Transmitting or indicating the displacement of capsules by electric, electromechanical, magnetic, or electromechanical means
- G01L9/0086—Transmitting or indicating the displacement of capsules by electric, electromechanical, magnetic, or electromechanical means using variations in capacitance
-
- 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
- G01L9/125—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 with temperature compensating means
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
1355338 Measuring pressure electrically PLESSEY CO Ltd 20 Aug 1971 [15 July 1970] 34265/70 Heading G1N An aneroid capsule for measuring atmospheric pressure is associated with a variable capacitor connected in an oscillator circuit whose frequency is therefore indicative of the pressure. As shown Fig. 1, a fixed plate 8 supports a three-stack aneroid capsule assembly 1 attached to a circular electrode 2, and also carries a tube 12 supporting fixed electrode 3. The assembly is housed in a container 13 with silicone oil 17 to level 16 covering the electrodes 2, 3 and also fixed capacitors 18, 19. The capsule 1 is subjected externally to atmospheric pressure via holes 35, 24. The capacitors 2, 3 and 18, 19 selectively determine the frequency of oscillation and by combining the three frequencies the atmospheric pressure is determined independently of variations in temperature.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3426570 | 1970-07-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1355338A true GB1355338A (en) | 1974-06-05 |
Family
ID=10363495
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1355338D Expired GB1355338A (en) | 1970-07-15 | 1970-07-15 | Atmospheric-pressure transducers |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1355338A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2354549A1 (en) * | 1976-06-07 | 1978-01-06 | Bunker Ramo | PRESSURE SENSORS |
DE2853504A1 (en) * | 1978-12-12 | 1980-06-19 | Speidel & Keller Kg | Capacitive blood pressure meter with frequency transducer - has capacitor with parallel plates connected to moving parts |
FR2479452A1 (en) * | 1980-03-26 | 1981-10-02 | Bosch Gmbh Robert | CONVERTER OF MEASURED SIZES FREQUENCY-FREQUENCY |
-
1970
- 1970-07-15 GB GB1355338D patent/GB1355338A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2354549A1 (en) * | 1976-06-07 | 1978-01-06 | Bunker Ramo | PRESSURE SENSORS |
DE2853504A1 (en) * | 1978-12-12 | 1980-06-19 | Speidel & Keller Kg | Capacitive blood pressure meter with frequency transducer - has capacitor with parallel plates connected to moving parts |
FR2479452A1 (en) * | 1980-03-26 | 1981-10-02 | Bosch Gmbh Robert | CONVERTER OF MEASURED SIZES FREQUENCY-FREQUENCY |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |