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GB712260A - Improvements in or relating to pressurized telecommunication cables - Google Patents

Improvements in or relating to pressurized telecommunication cables

Info

Publication number
GB712260A
GB712260A GB27837/51A GB2783751A GB712260A GB 712260 A GB712260 A GB 712260A GB 27837/51 A GB27837/51 A GB 27837/51A GB 2783751 A GB2783751 A GB 2783751A GB 712260 A GB712260 A GB 712260A
Authority
GB
United Kingdom
Prior art keywords
gas
sulphuric acid
water
relating
bromide
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
GB27837/51A
Inventor
Pierre Alphonse Herreng
Jules Gueron
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.)
Alsacienne de Constructions Mecaniques SA
Original Assignee
Alsacienne de Constructions Mecaniques SA
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 Alsacienne de Constructions Mecaniques SA filed Critical Alsacienne de Constructions Mecaniques SA
Publication of GB712260A publication Critical patent/GB712260A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
    • G01M3/22—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
    • G01M3/221—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for cables
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21H—OBTAINING ENERGY FROM RADIOACTIVE SOURCES; APPLICATIONS OF RADIATION FROM RADIOACTIVE SOURCES, NOT OTHERWISE PROVIDED FOR; UTILISING COSMIC RADIATION
    • G21H5/00—Applications of radiation from radioactive sources or arrangements therefor, not otherwise provided for 
    • G21H5/02—Applications of radiation from radioactive sources or arrangements therefor, not otherwise provided for  as tracers

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Paper (AREA)
  • Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)

Abstract

The Specification describes the preparation of radio-active methyl bromide, used for detecting leaks in gas-filled cables. Potassium bromide is irradiated with neutrons in an atomic pile and made into a slightly alkaline solution with water. The free bromine produced by the irradiation is then neutralized with H2S as described in a paper by Szilard and Chalmers. ("Nature" 1934, Volume 134, page 462.) Sulphuric acid is then added to the solution and technical methyl sulphate, the mixture then being heated so that methyl bromide is given off. This gas is freed from water in a refrigerant and dried in a sulphuric acid bubbler and a potassium hydroxide tube.
GB27837/51A 1950-12-06 1951-11-27 Improvements in or relating to pressurized telecommunication cables Expired GB712260A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1029175T 1950-12-06

Publications (1)

Publication Number Publication Date
GB712260A true GB712260A (en) 1954-07-21

Family

ID=9581679

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27837/51A Expired GB712260A (en) 1950-12-06 1951-11-27 Improvements in or relating to pressurized telecommunication cables

Country Status (2)

Country Link
FR (1) FR1029175A (en)
GB (1) GB712260A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1135682B (en) * 1959-11-10 1962-08-30 Cons Electrodynamics Corp Method for testing bodies with a closed inner cavity for tightness

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1135682B (en) * 1959-11-10 1962-08-30 Cons Electrodynamics Corp Method for testing bodies with a closed inner cavity for tightness

Also Published As

Publication number Publication date
FR1029175A (en) 1953-06-01

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