GB191009543A - Device for Indicating the Presence of Fire Damp by Means of a Selenium Cell and a Safety Lamp. - Google Patents

Device for Indicating the Presence of Fire Damp by Means of a Selenium Cell and a Safety Lamp.

Info

Publication number
GB191009543A
GB191009543A GB191009543DA GB191009543A GB 191009543 A GB191009543 A GB 191009543A GB 191009543D A GB191009543D A GB 191009543DA GB 191009543 A GB191009543 A GB 191009543A
Authority
GB
United Kingdom
Prior art keywords
indicating
circuit
selenium cell
points
safety lamp
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
Other languages
English (en)
Inventor
Heinrich Freise
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
Application granted granted Critical
Publication of GB191009543A publication Critical patent/GB191009543A/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
    • G01N21/72—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited using flame burners

Landscapes

  • Health & Medical Sciences (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material 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)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
GB191009543D 1909-04-27 1910-04-20 Device for Indicating the Presence of Fire Damp by Means of a Selenium Cell and a Safety Lamp. Expired GB191009543A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE191009543X 1909-04-27

Publications (1)

Publication Number Publication Date
GB191009543A true GB191009543A (en) 1910-07-21

Family

ID=33442483

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191009543D Expired GB191009543A (en) 1909-04-27 1910-04-20 Device for Indicating the Presence of Fire Damp by Means of a Selenium Cell and a Safety Lamp.

Country Status (3)

Country Link
DE (1) DE225664C (enrdf_load_stackoverflow)
FR (1) FR415132A (enrdf_load_stackoverflow)
GB (1) GB191009543A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
DE225664C (enrdf_load_stackoverflow)
FR415132A (enrdf_load_stackoverflow)

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