FR392849A - Improvements to safety lamps for mines - Google Patents

Improvements to safety lamps for mines

Info

Publication number
FR392849A
FR392849A FR392849DA FR392849A FR 392849 A FR392849 A FR 392849A FR 392849D A FR392849D A FR 392849DA FR 392849 A FR392849 A FR 392849A
Authority
FR
France
Prior art keywords
mines
safety lamps
lamps
safety
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
French (fr)
Inventor
Otto Max Mueller
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of FR392849A publication Critical patent/FR392849A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/02—Manufacture of electrodes or electrode systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23Q—IGNITION; EXTINGUISHING-DEVICES
    • F23Q1/00—Mechanical igniters

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Plasma Technology (AREA)
  • Separation By Low-Temperature Treatments (AREA)
FR392849D 1907-08-01 1908-07-31 Improvements to safety lamps for mines Expired FR392849A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE392849X 1931-12-09

Publications (1)

Publication Number Publication Date
FR392849A true FR392849A (en) 1908-12-07

Family

ID=6388082

Family Applications (1)

Application Number Title Priority Date Filing Date
FR392849D Expired FR392849A (en) 1907-08-01 1908-07-31 Improvements to safety lamps for mines

Country Status (2)

Country Link
FR (1) FR392849A (en)
GB (1) GB392849A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3715924A1 (en) * 1987-05-13 1988-12-01 Gte Licht Gmbh PHOTOCELL, ESPECIALLY FOR DETECTING UV RADIATION

Also Published As

Publication number Publication date
GB392849A (en) 1933-05-25

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