GB664788A - Improvements relating to apparatus for the measurement of low gas pressures - Google Patents

Improvements relating to apparatus for the measurement of low gas pressures

Info

Publication number
GB664788A
GB664788A GB1302249A GB1302249A GB664788A GB 664788 A GB664788 A GB 664788A GB 1302249 A GB1302249 A GB 1302249A GB 1302249 A GB1302249 A GB 1302249A GB 664788 A GB664788 A GB 664788A
Authority
GB
United Kingdom
Prior art keywords
vane
current
coil
pressure
photo
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
GB1302249A
Inventor
Jack Blears
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.)
Metropolitan Vickers Electrical Co Ltd
Original Assignee
Metropolitan Vickers Electrical 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 Metropolitan Vickers Electrical Co Ltd filed Critical Metropolitan Vickers Electrical Co Ltd
Priority to GB1302249A priority Critical patent/GB664788A/en
Publication of GB664788A publication Critical patent/GB664788A/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
    • G01L21/00—Vacuum gauges

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

664,788. Radiometric pressure gauges. METROPOLITAN-VICKERS ELECTRICAL CO., Ltd. May 2, 1950 [May 16, 1949], No. 13022/49. Class 40 (iii). [Also in Group XIX] The invention relates to a manometer of the Knudsen type in which a light vane 1 suspended by a filar suspension has its ends arranged between plates 4 and 5 maintained respectively hot and cold by liquid in pipes 6 so that the vane is rotated, the angular deflection being a measure of the gas pressure in space 3. According to the invention, the vane carries with it a coil 7 moving in a magnetic field, the current in the coil being controlled by photo-cells to which light is reflected from a mirror carried by the vane. The current direction is such as to tend to restore the vane to its original position the current in the equilibrium position being a measure of gas pressure. In the circuit shown in Fig. 2, photo-cells 12 and 13 illuminated differentially control the potential of the grid of a triode 10 thereby altering the cathode potential developed across resistor 11. A current then flows between a fixed potential point A and the cathode, part of the drop through a voltage divider 19 being tapped to feed the vane restoring coil 7. In the equilibrium position the pressure is indicated by meter 17.
GB1302249A 1949-05-16 1949-05-16 Improvements relating to apparatus for the measurement of low gas pressures Expired GB664788A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1302249A GB664788A (en) 1949-05-16 1949-05-16 Improvements relating to apparatus for the measurement of low gas pressures

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1302249A GB664788A (en) 1949-05-16 1949-05-16 Improvements relating to apparatus for the measurement of low gas pressures

Publications (1)

Publication Number Publication Date
GB664788A true GB664788A (en) 1952-01-09

Family

ID=10015379

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1302249A Expired GB664788A (en) 1949-05-16 1949-05-16 Improvements relating to apparatus for the measurement of low gas pressures

Country Status (1)

Country Link
GB (1) GB664788A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2986037A (en) * 1956-11-28 1961-05-30 Philips Corp Vacuum pressure gauges

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2986037A (en) * 1956-11-28 1961-05-30 Philips Corp Vacuum pressure gauges

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