FR50633E - Lampe de sécurité contre les coups de grisou - Google Patents

Lampe de sécurité contre les coups de grisou

Info

Publication number
FR50633E
FR50633E FR50633DA FR50633E FR 50633 E FR50633 E FR 50633E FR 50633D A FR50633D A FR 50633DA FR 50633 E FR50633 E FR 50633E
Authority
FR
France
Prior art keywords
blasts
safety lamp
lamp against
firedamp
against firedamp
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
Other languages
English (en)
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
Application granted granted Critical
Publication of FR50633E publication Critical patent/FR50633E/fr
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
    • F21L13/00—Electric lighting devices with built-in electric generators
    • F21L13/02—Electric lighting devices with built-in electric generators with fluid drive

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • General Engineering & Computer Science (AREA)
FR50633D 1939-06-02 1939-06-02 Lampe de sécurité contre les coups de grisou Expired FR50633E (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR50633T 1939-06-02

Publications (1)

Publication Number Publication Date
FR50633E true FR50633E (fr) 1941-01-27

Family

ID=8685613

Family Applications (1)

Application Number Title Priority Date Filing Date
FR50633D Expired FR50633E (fr) 1939-06-02 1939-06-02 Lampe de sécurité contre les coups de grisou

Country Status (1)

Country Link
FR (1) FR50633E (fr)

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