GB682663A - Improvements in or relating to apparatus for indicating the presence of inflammable vapours or gases - Google Patents

Improvements in or relating to apparatus for indicating the presence of inflammable vapours or gases

Info

Publication number
GB682663A
GB682663A GB963647A GB963647A GB682663A GB 682663 A GB682663 A GB 682663A GB 963647 A GB963647 A GB 963647A GB 963647 A GB963647 A GB 963647A GB 682663 A GB682663 A GB 682663A
Authority
GB
United Kingdom
Prior art keywords
filament
diaphragm
switch
gases
inflammable
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
GB963647A
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
Priority to BE517125D priority Critical patent/BE517125A/xx
Application filed by Individual filed Critical Individual
Priority to GB963647A priority patent/GB682663A/en
Priority to DER5671A priority patent/DE916859C/en
Publication of GB682663A publication Critical patent/GB682663A/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
    • G01N7/00—Analysing materials by measuring the pressure or volume of a gas or vapour
    • G01N7/10—Analysing materials by measuring the pressure or volume of a gas or vapour by allowing diffusion of components through a porous wall and measuring a pressure or volume difference
    • G01N7/12—Analysing materials by measuring the pressure or volume of a gas or vapour by allowing diffusion of components through a porous wall and measuring a pressure or volume difference the diffusion being followed by combustion or catalytic oxidation

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (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)
  • Feeding And Controlling Fuel (AREA)
  • Emergency Alarm Devices (AREA)

Abstract

<PICT:0682663/III/1> An apparatus for detecting the presence of inflammable vapours or gases in the atmosphere is of the type wherein the gas diffuses into a porous vessel 6 containing an electrically heated filament 5, the vacuum produced in the vessel by combustion of the gas, being utilized to short-circuit, through the medium of a switch 12, 13 actuated by a diaphragm 10, a pilot lamp 1 and thereby illuminate a higher rating warning lamp 2 connected in series with the pilot lamp, when the percentage of inflammable gas reaches a predetermined figure and the apparatus is characterized in that the two lamps are connected to the source of current through a thermally operated switch 7, 8, e.g. a bimetallic strip, positioned within the porous vessel and capable of being maintained in a closed position by the heat from the filament. The filament is connected in parallel with the lamp circuit. Member 14 of the diaphragm actuated switch is a bimetallic strip arranged to bring closer the diaphragm contacts to compensate for fall in battery voltage and deterioration of the filament during use.
GB963647A 1947-04-11 1947-04-11 Improvements in or relating to apparatus for indicating the presence of inflammable vapours or gases Expired GB682663A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BE517125D BE517125A (en) 1947-04-11
GB963647A GB682663A (en) 1947-04-11 1947-04-11 Improvements in or relating to apparatus for indicating the presence of inflammable vapours or gases
DER5671A DE916859C (en) 1947-04-11 1951-04-01 Device for displaying flammable gases

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB963647A GB682663A (en) 1947-04-11 1947-04-11 Improvements in or relating to apparatus for indicating the presence of inflammable vapours or gases

Publications (1)

Publication Number Publication Date
GB682663A true GB682663A (en) 1952-11-12

Family

ID=9875818

Family Applications (1)

Application Number Title Priority Date Filing Date
GB963647A Expired GB682663A (en) 1947-04-11 1947-04-11 Improvements in or relating to apparatus for indicating the presence of inflammable vapours or gases

Country Status (3)

Country Link
BE (1) BE517125A (en)
DE (1) DE916859C (en)
GB (1) GB682663A (en)

Also Published As

Publication number Publication date
BE517125A (en)
DE916859C (en) 1954-08-19

Similar Documents

Publication Publication Date Title
US2400940A (en) Gas detection apparatus
GB682663A (en) Improvements in or relating to apparatus for indicating the presence of inflammable vapours or gases
US2723389A (en) Warning light with dim-light display
GB426981A (en) Improvements in or relating to electric signalling or indicating means
GB370142A (en) Circuit for testing electrically-operated photographic flashlamps
US1176199A (en) Gas-analyzing apparatus.
GB477338A (en) Improvements in or relating to the detection and indication of the presence of inflammable vapours or gases
GB676282A (en) Improvements in or relating to gas burners
GB484194A (en) Improvements in or relating to apparatus for indicating the presence of inflammable vapours or gases
SU122549A1 (en) Gas discharge bottom lamp
GB496566A (en) Improvements in or relating to gas detectors
GB255568A (en) Novel or improved tell-tale device for use in indicating whether an unseen light is off or on
GB397815A (en) Improvements in and relating to gas detectors
GB588954A (en) Improvements in or relating to gas or vapour detector devices
GB762217A (en) Improved electric lighting equipment
GB659621A (en) Improvements in or relating to devices for testing for faults in photographic flash bulbs, electric incandescent lamps and the like
GB549583A (en) Improvements in or relating to gas or vapour detectors for use in mines or other places
GB331711A (en) Improvements in or relating to apparatus for indicating the presence of inflammable vapours or gases
GB794452A (en) Improvements in or relating to flashlights
GB711133A (en) Improvements in or relating to apparatus for indicating the presence of explosive orinflammable vapours or gases
GB530524A (en) Improvements in or relating to apparatus for indicating the presence of inflammable vapours or gases
GB448891A (en) Improvements relating to electric discharge lamps
GB374879A (en) Improvements in or relating to photographic flash light apparatus
GB703369A (en) Improvements in or relating to lighting systems
GB442720A (en) Electric switch with glow lamp fitted into same indicating the location of this switch