GB530750A - Improvements in or relating to electric mining lamps - Google Patents

Improvements in or relating to electric mining lamps

Info

Publication number
GB530750A
GB530750A GB19246/39A GB1924639A GB530750A GB 530750 A GB530750 A GB 530750A GB 19246/39 A GB19246/39 A GB 19246/39A GB 1924639 A GB1924639 A GB 1924639A GB 530750 A GB530750 A GB 530750A
Authority
GB
United Kingdom
Prior art keywords
lamp
contacts
terminals
accumulator
july
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
GB19246/39A
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.)
Friemann and Wolf GmbH
Original Assignee
Friemann and Wolf GmbH
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 Friemann and Wolf GmbH filed Critical Friemann and Wolf GmbH
Publication of GB530750A publication Critical patent/GB530750A/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
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
    • G03F3/00—Colour separation; Correction of tonal value

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Secondary Cells (AREA)

Abstract

530,750. Electric battery lamps. FRIEMANN & WOLF GES. July 1, 1939, No. 19246. Convention date, July 1, 1938. [Class 39 (ii)] In a miner's electric lamp the contacts on the lamp bulb are arranged to co-operate directly with the terminals of the accumulator. Figs. 3 and 4 show alternative constructions in which (1) contacts 13 on the side of the lamp cap cooperate with spring contact blades 12 forming terminals, and (2) contacts 21 on the under face of an enlarged lamp cap 20 co-operate with spring contact plungers 4 forming accumulator terminals. Switching is effected by rotation of the accumulator casing which is prevented from being completely unscrewed from the upper part of the lamp by a magnetic lock.
GB19246/39A 1938-07-01 1939-07-01 Improvements in or relating to electric mining lamps Expired GB530750A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE530750X 1938-07-01

Publications (1)

Publication Number Publication Date
GB530750A true GB530750A (en) 1940-12-19

Family

ID=6554636

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19246/39A Expired GB530750A (en) 1938-07-01 1939-07-01 Improvements in or relating to electric mining lamps

Country Status (1)

Country Link
GB (1) GB530750A (en)

Similar Documents

Publication Publication Date Title
GB530750A (en) Improvements in or relating to electric mining lamps
GB534307A (en) Improvements in or relating to electric lighting units
GB533189A (en) An electric battery lamp for illuminating keyholes and other door and like fittings
GB479197A (en) Improvements in or relating to miners' safety and other electric battery lamps
GB473095A (en) Improvements in electric lamp holders
GB532827A (en) Improvements in or relating to portable electric battery lamps
GB519493A (en) Improvements in electric flashlights
GB493223A (en) Improvements in battery lamps
GB446376A (en) Improvements in or relating to electric battery lamps
GB272439A (en) Improved miner's lamp for indicating the presence of fire-damp
GB484676A (en) Improvements in or relating to electric battery lamps or torches
GB459248A (en) Improvements in electric lamps
GB522342A (en) Improvements in and relating to electric incandescent lamps and the mounting thereof
GB376972A (en) Improvements in or relating to miners' safety and other electric battery lamps
GB568133A (en) Improvements in and relating to bases for electric lamps and similar devices
GB474073A (en) Improvements in or relating to rotary electric couplings
GB344169A (en) Improvements in electric pocket and hand lamps
GB444347A (en) Improvements in or relating to miners' and like battery hand lamps
GB1037208A (en) Improvements in battery-operated electric torches
GB154967A (en) Improvements relating to miners' electric safety lamps
GB556130A (en) Improvements in and relating to holders for tubular electric lamps
GB537053A (en) Improvements in and relating to electric battery torches
GB528076A (en) Improvements in electric battery lamps of the safety or like types
GB536275A (en) Improvements relating to caps for electric lamps
GB413182A (en) Improvements in and relating to electric battery lamps