GB175074A - Improvements in miners' electric safety lamps - Google Patents

Improvements in miners' electric safety lamps

Info

Publication number
GB175074A
GB175074A GB31891/20A GB3189120A GB175074A GB 175074 A GB175074 A GB 175074A GB 31891/20 A GB31891/20 A GB 31891/20A GB 3189120 A GB3189120 A GB 3189120A GB 175074 A GB175074 A GB 175074A
Authority
GB
United Kingdom
Prior art keywords
lamp
miners
loop
sloping
holders
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
GB31891/20A
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.)
John Davis and Son Derby Ltd
Original Assignee
John Davis and Son Derby Ltd
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 John Davis and Son Derby Ltd filed Critical John Davis and Son Derby Ltd
Priority to GB31891/20A priority Critical patent/GB175074A/en
Publication of GB175074A publication Critical patent/GB175074A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21L—LIGHTING DEVICES OR SYSTEMS THEREOF, BEING PORTABLE OR SPECIALLY ADAPTED FOR TRANSPORTATION
    • F21L4/00—Electric lighting devices with self-contained electric batteries or cells

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Securing Globes, Refractors, Reflectors Or The Like (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

175,074. Davis & Son (Derby), Ltd., J., and Dearle, G. Nov. 11, 1920. Securing globes to holders; reflector holders.-In a miners' safety lamp constructed to be free from inside pillars or fixed obstructions to the free distribution of light, the lamp glass a is provided at its bottom with a flange a<1> tapered or sloping externally to fit the sloping inside of the top b of the lamp or cell case c and is held thereto by the bulb carrier j which is secured in position by ledges k<1> carried by spring pieces k on the inside of the top b of the lamp. At or near the top of the cell case, and preferably hinged or pivoted thereto, is an inverted U-shaped carrying-loop e and this loop is provided with an adjustable reflector f capable of being locked by spring washers in any position about the pivots h.
GB31891/20A 1920-11-11 1920-11-11 Improvements in miners' electric safety lamps Expired GB175074A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB31891/20A GB175074A (en) 1920-11-11 1920-11-11 Improvements in miners' electric safety lamps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB31891/20A GB175074A (en) 1920-11-11 1920-11-11 Improvements in miners' electric safety lamps

Publications (1)

Publication Number Publication Date
GB175074A true GB175074A (en) 1922-02-13

Family

ID=10329924

Family Applications (1)

Application Number Title Priority Date Filing Date
GB31891/20A Expired GB175074A (en) 1920-11-11 1920-11-11 Improvements in miners' electric safety lamps

Country Status (1)

Country Link
GB (1) GB175074A (en)

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