GB539565A - Improvements in pirani pressure gauges - Google Patents

Improvements in pirani pressure gauges

Info

Publication number
GB539565A
GB539565A GB810640A GB810640A GB539565A GB 539565 A GB539565 A GB 539565A GB 810640 A GB810640 A GB 810640A GB 810640 A GB810640 A GB 810640A GB 539565 A GB539565 A GB 539565A
Authority
GB
United Kingdom
Prior art keywords
pressure gauges
pirani pressure
class
pirani
resistances
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
GB810640A
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.)
DAVID HENRY DONALDSON
General Electric Co PLC
Original Assignee
DAVID HENRY DONALDSON
General Electric Co PLC
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 DAVID HENRY DONALDSON, General Electric Co PLC filed Critical DAVID HENRY DONALDSON
Priority to GB810640A priority Critical patent/GB539565A/en
Publication of GB539565A publication Critical patent/GB539565A/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
    • G01L21/10—Vacuum gauges by measuring variations in the heat conductivity of the medium, the pressure of which is to be measured
    • G01L21/12—Vacuum gauges by measuring variations in the heat conductivity of the medium, the pressure of which is to be measured measuring changes in electric resistance of measuring members, e.g. of filaments; Vacuum gauges of the Pirani type
    • 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)
  • Measurement Of Force In General (AREA)

Abstract

539,565. Wire resistances ; temperature variable resistances. GENERAL ELECTRIC CO., Ltd., and DONALDSON, D. H. May 6, 1940, No. 8106. [Class 37] The filament of a Pirani pressure gauge consists of a relatively strong but chemically active metal, such as tungsten, coated with a layer of a relatively weak but chemically inert metal such as rhodium. Specification 321,914 [Class 37], is referred to.
GB810640A 1940-05-06 1940-05-06 Improvements in pirani pressure gauges Expired GB539565A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB810640A GB539565A (en) 1940-05-06 1940-05-06 Improvements in pirani pressure gauges

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB810640A GB539565A (en) 1940-05-06 1940-05-06 Improvements in pirani pressure gauges

Publications (1)

Publication Number Publication Date
GB539565A true GB539565A (en) 1941-09-16

Family

ID=9845873

Family Applications (1)

Application Number Title Priority Date Filing Date
GB810640A Expired GB539565A (en) 1940-05-06 1940-05-06 Improvements in pirani pressure gauges

Country Status (1)

Country Link
GB (1) GB539565A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009059654A1 (en) * 2007-11-09 2009-05-14 Vacuubrand Gmbh + Co Kg Heat conducting gas pressure measurement arrangement

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009059654A1 (en) * 2007-11-09 2009-05-14 Vacuubrand Gmbh + Co Kg Heat conducting gas pressure measurement arrangement

Similar Documents

Publication Publication Date Title
GB539565A (en) Improvements in pirani pressure gauges
USD122479S (en) Design for a footstool
CA394993A (en) Nickel and alloy coating process
CA391328A (en) Pressure gauge
CA401654A (en) Silver alloy
AU116820B2 (en) Improvements in or relating tothe uncoiling of wire or other strip material
AU113601B2 (en) Improved gas pressure regulator
CA393098A (en) Silver alloy
CA395120A (en) Hard alloy production
CA392637A (en) Starch manufacturing and packing process
CA391817A (en) Nickel alloy
CA396603A (en) Precious metal alloy
CA387538A (en) Nickel and alloys
CA400665A (en) Gold alloy
CA396973A (en) Gold alloy
CA390055A (en) Borehole pressure gauge
AU384741A (en) Improvements in or relating tothe uncoiling of wire or other strip material
CA398783A (en) Bore gauge
AU173440A (en) Improved gas pressure regulator
CA391438A (en) Needle and small instrument manufacture
CA387216A (en) Alloy production
AU114649B2 (en) Nickel-chromium-iron alloys, their manufacture, and articles made therefrom
CA395492A (en) Metal tubing manufacture
CA389781A (en) Nitrate and chlorine production
CA393361A (en) Nickel-chromium alloy