GB176445A - Improvements relating to electric lamps for use in mines and for other purposes - Google Patents

Improvements relating to electric lamps for use in mines and for other purposes

Info

Publication number
GB176445A
GB176445A GB31576/20A GB3157620A GB176445A GB 176445 A GB176445 A GB 176445A GB 31576/20 A GB31576/20 A GB 31576/20A GB 3157620 A GB3157620 A GB 3157620A GB 176445 A GB176445 A GB 176445A
Authority
GB
United Kingdom
Prior art keywords
lamp
mines
purposes
improvements relating
electric lamps
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
GB31576/20A
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.)
THOR ELECTRIC SAFETY LAMP COMP
Original Assignee
THOR ELECTRIC SAFETY LAMP COMP
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 THOR ELECTRIC SAFETY LAMP COMP filed Critical THOR ELECTRIC SAFETY LAMP COMP
Priority to GB31576/20A priority Critical patent/GB176445A/en
Publication of GB176445A publication Critical patent/GB176445A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/08—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters for producing coloured light, e.g. monochromatic; for reducing intensity of light
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21L—LIGHTING DEVICES OR SYSTEMS THEREOF, BEING PORTABLE OR SPECIALLY ADAPTED FOR TRANSPORTATION
    • F21L2/00—Systems of electric lighting devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/02—Fastening of light sources or lamp holders with provision for adjustment, e.g. for focusing

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Abstract

176,445. Thor Electric Safety Lamp Co., Ltd., and Stretton, T. Nov. 8, 1920. Ceiling and like overhead lamps. - In an electric lamp for use in mines and elsewhere, a flanged lamp-holder h<1> is suspended beneath the battery chamber a and a reflector o is secured in it by means of screws; a globe j is also clamped in the holder by a threaded ring i which supports a shade or reflector p. Seals may be applied to these parts to prevent unauthorized opening of the lamp.
GB31576/20A 1920-11-08 1920-11-08 Improvements relating to electric lamps for use in mines and for other purposes Expired GB176445A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB31576/20A GB176445A (en) 1920-11-08 1920-11-08 Improvements relating to electric lamps for use in mines and for other purposes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB31576/20A GB176445A (en) 1920-11-08 1920-11-08 Improvements relating to electric lamps for use in mines and for other purposes

Publications (1)

Publication Number Publication Date
GB176445A true GB176445A (en) 1922-03-08

Family

ID=10325183

Family Applications (1)

Application Number Title Priority Date Filing Date
GB31576/20A Expired GB176445A (en) 1920-11-08 1920-11-08 Improvements relating to electric lamps for use in mines and for other purposes

Country Status (1)

Country Link
GB (1) GB176445A (en)

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