GB1355338A - Atmospheric-pressure transducers - Google Patents

Atmospheric-pressure transducers

Info

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
Application number
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Plessey Co Ltd
Original Assignee
Plessey Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Plessey Co Ltd filed Critical Plessey Co Ltd
Publication of GB1355338A publication Critical patent/GB1355338A/en
Expired legal-status Critical Current

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.
GB1355338D 1970-07-15 1970-07-15 Atmospheric-pressure transducers Expired GB1355338A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (3)

* Cited by examiner, † Cited by third party
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