GB557613A - Improved arrangement for the indication of atmospheric moisture - Google Patents

Improved arrangement for the indication of atmospheric moisture

Info

Publication number
GB557613A
GB557613A GB796340A GB796340A GB557613A GB 557613 A GB557613 A GB 557613A GB 796340 A GB796340 A GB 796340A GB 796340 A GB796340 A GB 796340A GB 557613 A GB557613 A GB 557613A
Authority
GB
United Kingdom
Prior art keywords
lamp
moisture
current
indication
tube
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
GB796340A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston 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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Priority to GB796340A priority Critical patent/GB557613A/en
Publication of GB557613A publication Critical patent/GB557613A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
    • G01N27/048—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance for determining moisture content of the material

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)

Abstract

557,613. Hygrometric apparatus. BRITISH THOMSON-HOUSTON CO., Ltd., RUFF, H. R., and DAVIES, L. J. May 3, 1940, No. 7963. [Class 97 (iii)] [Also in Group XL] In electric hygrometric apparatus in which variation, due to moisture deposit, of the resistance of a normally insulating path between two conductors is indicated, the indicating current alsc controls a heater so that increase of current evaporates the moisture and reduces the current whereby the apparatus is rapidly conditioned tc give a fresh indication. As described the hygroscopic element consisting of conductors 8, 10 is carried by a lamp 6 which also forms the heater, the indication being given by lamp 2 when a gas discharge tube 4 operates. The normal grid and anode A.C. potentials derived from transformer 3 are out of phase so that the tube is non-conducting, but when the hygroscopic element conducts, the grid of the tube becomes positive half cycles of anode potential so that the tube passes current, lights lamp 2 and heats lamp 6 to evaporate the moisture. Lamp 6 may be normally heated to some extent by the provision of resistance 11. The hygroscopic element may also be formed by winding on 3 wires and removing the central one to form the path which by using fine wire may be small enough to be bridged by moisture particles. The arrangement may be preferentially sensitive to moisture drops rather than dew.
GB796340A 1940-05-03 1940-05-03 Improved arrangement for the indication of atmospheric moisture Expired GB557613A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB796340A GB557613A (en) 1940-05-03 1940-05-03 Improved arrangement for the indication of atmospheric moisture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB796340A GB557613A (en) 1940-05-03 1940-05-03 Improved arrangement for the indication of atmospheric moisture

Publications (1)

Publication Number Publication Date
GB557613A true GB557613A (en) 1943-11-29

Family

ID=9843136

Family Applications (1)

Application Number Title Priority Date Filing Date
GB796340A Expired GB557613A (en) 1940-05-03 1940-05-03 Improved arrangement for the indication of atmospheric moisture

Country Status (1)

Country Link
GB (1) GB557613A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2774938A (en) * 1952-01-15 1956-12-18 Univ Wichita Foundation For In Electronic moisture meter
US3245067A (en) * 1963-05-24 1966-04-05 B R K Electronics Inc Detection of products of combustion
FR2410821A1 (en) * 1977-12-02 1979-06-29 Vaisala Oy PROCESS FOR MINIMIZING THE ADVERSE PROPERTIES OF A HUMIDITY DETECTOR

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2774938A (en) * 1952-01-15 1956-12-18 Univ Wichita Foundation For In Electronic moisture meter
US3245067A (en) * 1963-05-24 1966-04-05 B R K Electronics Inc Detection of products of combustion
FR2410821A1 (en) * 1977-12-02 1979-06-29 Vaisala Oy PROCESS FOR MINIMIZING THE ADVERSE PROPERTIES OF A HUMIDITY DETECTOR

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