GB298767A - Improvements in or relating to apparatus for detecting the presence of inflammable gas - Google Patents

Improvements in or relating to apparatus for detecting the presence of inflammable gas

Info

Publication number
GB298767A
GB298767A GB2688827A GB2688827A GB298767A GB 298767 A GB298767 A GB 298767A GB 2688827 A GB2688827 A GB 2688827A GB 2688827 A GB2688827 A GB 2688827A GB 298767 A GB298767 A GB 298767A
Authority
GB
United Kingdom
Prior art keywords
lamp
filament
resistance
terminal
inflammable gas
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
GB2688827A
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 GB2688827A priority Critical patent/GB298767A/en
Publication of GB298767A publication Critical patent/GB298767A/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
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
    • G01N21/71—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited
    • G01N21/716—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited by measuring the radiation emitted by a test object treated by combustion gases for investigating the composition of gas mixtures

Landscapes

  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

298,767. Thornton, W. M. Oct. 11, 1927. Gas analysis. - A miners' electric lamp has two filament, one sealed in air and serving as a lamp, the other exposed to the atmosphere, and a variable resistance adjustable by relative movement of two parts of the lamp casing is used to bring the two filaments to equal luminosity, thereby indicating the percentage of inflammable gas present. In the illustrated modification the resistance is mounted on the under side of the cap C and is connected in series with the lamp DI. One terminal BI of the battery is connected to the lamp and to the filament F through the central contact H; the other terminal contacts at B4, B3 with the resistance and with a contact D3 connected to the filament, the amount of resisance being varied by rotating the cap. The filament circuit is broken when the terminal B3 makes contact with D2. In a modification the lamp and filament are in series with one another and the resistance is shunted across the former.
GB2688827A 1927-10-11 1927-10-11 Improvements in or relating to apparatus for detecting the presence of inflammable gas Expired GB298767A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2688827A GB298767A (en) 1927-10-11 1927-10-11 Improvements in or relating to apparatus for detecting the presence of inflammable gas

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2688827A GB298767A (en) 1927-10-11 1927-10-11 Improvements in or relating to apparatus for detecting the presence of inflammable gas

Publications (1)

Publication Number Publication Date
GB298767A true GB298767A (en) 1928-10-18

Family

ID=10250766

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2688827A Expired GB298767A (en) 1927-10-11 1927-10-11 Improvements in or relating to apparatus for detecting the presence of inflammable gas

Country Status (1)

Country Link
GB (1) GB298767A (en)

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