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GB771040A - Improvements relating to pressure measuring devices - Google Patents

Improvements relating to pressure measuring devices

Info

Publication number
GB771040A
GB771040A GB1847455A GB1847455A GB771040A GB 771040 A GB771040 A GB 771040A GB 1847455 A GB1847455 A GB 1847455A GB 1847455 A GB1847455 A GB 1847455A GB 771040 A GB771040 A GB 771040A
Authority
GB
United Kingdom
Prior art keywords
bellows
tube
secondary windings
liquid
pressure difference
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
GB1847455A
Inventor
John Ernest Fielden
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.)
Fielden Electronics Ltd
Original Assignee
Fielden Electronics 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 Fielden Electronics Ltd filed Critical Fielden Electronics Ltd
Priority to GB1847455A priority Critical patent/GB771040A/en
Publication of GB771040A publication Critical patent/GB771040A/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
    • G01L13/00—Devices or apparatus for measuring differences of two or more fluid pressure values
    • G01L13/02—Devices or apparatus for measuring differences of two or more fluid pressure values using elastically-deformable members or pistons as sensing elements
    • G01L13/023—Devices or apparatus for measuring differences of two or more fluid pressure values using elastically-deformable members or pistons as sensing elements using bellows
    • 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
    • G01L9/0033—Transmitting or indicating the displacement of bellows by electric, electromechanical, magnetic, or electromagnetic means
    • G01L9/0036—Transmitting or indicating the displacement of bellows by electric, electromechanical, magnetic, or electromagnetic means using variations in inductance

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

771,040. Electric measuring systems. FIELDEN ELECTRONICS, Ltd. June 27, 1955, No. 18474/55. Class 40 (1). Apparatus for measuring a pressure difference comprises two similar, liquid-filled containers 2, 3 communicating via a tube 4, each container enclosing a bellows 5, 6 connected via ports 19, 20 to the pressures whose difference it is required to determine, the upper part of the bellows comprising diaphragms 7, 8 attached via rods 9, 10 to the cores 11, 12 of similar differential transformers. The secondary windings of each transformer are connected in series opposition to give zero output when the pressures inside the bellows are equal, and the two pairs of secondary windings are joined in series to give a voltage proportional to pressure difference. Stoppers 17, 18 in partitions 15, 16 prevent an excess pressure being transmitted from one bellows to the other. The apparatus does not respond to changes of temperature, leakage of liquid, &c. which produce equal effects in both containers. The upper limit of frequency response is predetermined by an adjustable restriction in the tube 4.
GB1847455A 1955-06-27 1955-06-27 Improvements relating to pressure measuring devices Expired GB771040A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1847455A GB771040A (en) 1955-06-27 1955-06-27 Improvements relating to pressure measuring devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1847455A GB771040A (en) 1955-06-27 1955-06-27 Improvements relating to pressure measuring devices

Publications (1)

Publication Number Publication Date
GB771040A true GB771040A (en) 1957-03-27

Family

ID=10113055

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1847455A Expired GB771040A (en) 1955-06-27 1955-06-27 Improvements relating to pressure measuring devices

Country Status (1)

Country Link
GB (1) GB771040A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3534612A (en) * 1968-03-20 1970-10-20 K D G Instr Ltd Pressure difference transducers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3534612A (en) * 1968-03-20 1970-10-20 K D G Instr Ltd Pressure difference transducers

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