GB202435A - Improvements in or relating to apparatus for measuring fluid pressures - Google Patents

Improvements in or relating to apparatus for measuring fluid pressures

Info

Publication number
GB202435A
GB202435A GB1484422A GB1484422A GB202435A GB 202435 A GB202435 A GB 202435A GB 1484422 A GB1484422 A GB 1484422A GB 1484422 A GB1484422 A GB 1484422A GB 202435 A GB202435 A GB 202435A
Authority
GB
United Kingdom
Prior art keywords
point
lever
chambers
hysteresis
pressure
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
GB1484422A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB1484422A priority Critical patent/GB202435A/en
Publication of GB202435A publication Critical patent/GB202435A/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
    • G01L7/00—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements

Landscapes

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

Abstract

202,435. Barnes, J. W. May 26, 1922. Elastic-diaphragm pressure gauges.-Comprises a method of or means for eliminating hysteresis or lag in fluid-pressure measuring instruments and consists in coupling a plurality of resilient chambers together in such manner that one or more controls the pressure applied to others and the hysteresis occurs in opposite directions, the indicating means being connected to a point in the system which moves positively for changes of pressure, but does not move for change of hysteresis. The invention is described as applied to an altimeter for air-craft. Two similar aneroid chambers 1, 2 are mounted on a base 3. A spring 6 having a fulcrum on a knife-edge 7 on a wedge-piece 8 engages at the ends under knife edges 5, 4 carried by the chambers 1, 2, the position of the fulcrum 7 is such that the spring exerts unequal efforts on the two chambers. A lever 9 rests at one end on the chamber 2 by means of a knife-edge 11 and at the other end by means of a roller 10 on the chamber 1. Due to hysteresis or lag only, the lever 9 tends to turn about a point such as 13, while due to variations in pressure only, the lever 9 tends to turn about some point to the left of the point 13. The indicating means are thus actuated from the point 13 which has no movement due to lag, and the mechanism comprises a lever 14, a linkage 16, and chain operating a pointer 17. The position of the point 13 is determined by trial.
GB1484422A 1922-05-26 1922-05-26 Improvements in or relating to apparatus for measuring fluid pressures Expired GB202435A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1484422A GB202435A (en) 1922-05-26 1922-05-26 Improvements in or relating to apparatus for measuring fluid pressures

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1484422A GB202435A (en) 1922-05-26 1922-05-26 Improvements in or relating to apparatus for measuring fluid pressures

Publications (1)

Publication Number Publication Date
GB202435A true GB202435A (en) 1923-08-23

Family

ID=10048471

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1484422A Expired GB202435A (en) 1922-05-26 1922-05-26 Improvements in or relating to apparatus for measuring fluid pressures

Country Status (1)

Country Link
GB (1) GB202435A (en)

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