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GB520554A - Improvements in or relating to portable electric hand lamps for use in mines - Google Patents

Improvements in or relating to portable electric hand lamps for use in mines

Info

Publication number
GB520554A
GB520554A GB30867/38A GB3086738A GB520554A GB 520554 A GB520554 A GB 520554A GB 30867/38 A GB30867/38 A GB 30867/38A GB 3086738 A GB3086738 A GB 3086738A GB 520554 A GB520554 A GB 520554A
Authority
GB
United Kingdom
Prior art keywords
mines
relating
portable electric
electric hand
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
GB30867/38A
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
Priority to GB30867/38A priority Critical patent/GB520554A/en
Publication of GB520554A publication Critical patent/GB520554A/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)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Abstract

520,554. Battery lamps, STOPPEL, P., and FRIEMANN & WOLF GES. Oct. 25, 1938, No. 30867. Drawings to Specification. [Class 39 (ii)] All the current connections in a battery lamp are soldered or welded together, with the exception of the switching connection and including the connections between the lamp filament and the circuit terminals. In the case of plug-connected lamps no plugs are soldered in with readily fusible high conductivity solder.
GB30867/38A 1938-10-25 1938-10-25 Improvements in or relating to portable electric hand lamps for use in mines Expired GB520554A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB30867/38A GB520554A (en) 1938-10-25 1938-10-25 Improvements in or relating to portable electric hand lamps for use in mines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB30867/38A GB520554A (en) 1938-10-25 1938-10-25 Improvements in or relating to portable electric hand lamps for use in mines

Publications (1)

Publication Number Publication Date
GB520554A true GB520554A (en) 1940-04-26

Family

ID=10314370

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30867/38A Expired GB520554A (en) 1938-10-25 1938-10-25 Improvements in or relating to portable electric hand lamps for use in mines

Country Status (1)

Country Link
GB (1) GB520554A (en)

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