GB327033A - Improvements in miners' electric battery lamps - Google Patents

Improvements in miners' electric battery lamps

Info

Publication number
GB327033A
GB327033A GB12378/29A GB1237829A GB327033A GB 327033 A GB327033 A GB 327033A GB 12378/29 A GB12378/29 A GB 12378/29A GB 1237829 A GB1237829 A GB 1237829A GB 327033 A GB327033 A GB 327033A
Authority
GB
United Kingdom
Prior art keywords
bulb
miners
fuse
electric battery
battery terminal
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
GB12378/29A
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.)
WILLIAM GRAFTON
John Davis and Son Derby Ltd
Original Assignee
WILLIAM GRAFTON
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 WILLIAM GRAFTON, John Davis and Son Derby Ltd filed Critical WILLIAM GRAFTON
Priority to GB12378/29A priority Critical patent/GB327033A/en
Publication of GB327033A publication Critical patent/GB327033A/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
    • 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
    • F21V25/00—Safety devices structurally associated with lighting devices
    • F21V25/02—Safety devices structurally associated with lighting devices coming into action when lighting device is disturbed, dismounted, or broken

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

327,033. Davis & Son, Derby, Ltd., J., and Grafton, W. April 22, 1929. Battery lamps.-A device for short-circuiting the filament of the bulb c of a miner's lamp and for blowing a fuse i connected with the circuit thereof when the protecting glass casing b is broken comprises a push-rod a which is fitted at one end into a recess b<1> of the casing and depresses a spring-contact strip d. The central contact h of the bulb is connected through a metal piece o to a metal strip g, which is secured between fibre pieces k and is conected through the fuse i to a battery terminal. The screwed thread of the bulb is connected to the other battery terminal through the holder e.
GB12378/29A 1929-04-22 1929-04-22 Improvements in miners' electric battery lamps Expired GB327033A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB12378/29A GB327033A (en) 1929-04-22 1929-04-22 Improvements in miners' electric battery lamps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB12378/29A GB327033A (en) 1929-04-22 1929-04-22 Improvements in miners' electric battery lamps

Publications (1)

Publication Number Publication Date
GB327033A true GB327033A (en) 1930-03-27

Family

ID=10003431

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12378/29A Expired GB327033A (en) 1929-04-22 1929-04-22 Improvements in miners' electric battery lamps

Country Status (1)

Country Link
GB (1) GB327033A (en)

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