FR392849A - Improvements to safety lamps for mines - Google Patents
Improvements to safety lamps for minesInfo
- 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
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)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Plasma Technology (AREA)
- Separation By Low-Temperature Treatments (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE392849X | 1907-08-01 |
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)
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 |
-
1908
- 1908-07-31 FR FR392849D patent/FR392849A/en not_active Expired
-
1932
- 1932-12-09 GB GB34999/32A patent/GB392849A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB392849A (en) | 1933-05-25 |
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