FR788922A - Improvements in the manufacture of electric lamps - Google Patents
Improvements in the manufacture of electric lampsInfo
- Publication number
- FR788922A FR788922A FR788922DA FR788922A FR 788922 A FR788922 A FR 788922A FR 788922D A FR788922D A FR 788922DA FR 788922 A FR788922 A FR 788922A
- Authority
- FR
- France
- Prior art keywords
- manufacture
- electric lamps
- lamps
- electric
- 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
- H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
- H01J9/32—Sealing leading-in conductors
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US721270A US2153404A (en) | 1934-04-19 | 1934-04-19 | Method of making stems for sealed electrical devices |
Publications (1)
Publication Number | Publication Date |
---|---|
FR788922A true FR788922A (en) | 1935-10-19 |
Family
ID=24897264
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR788922D Expired FR788922A (en) | 1934-04-19 | 1935-04-17 | Improvements in the manufacture of electric lamps |
Country Status (4)
Country | Link |
---|---|
US (1) | US2153404A (en) |
DE (1) | DE732225C (en) |
FR (1) | FR788922A (en) |
GB (1) | GB439927A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH234242A (en) * | 1942-03-14 | 1944-09-15 | Philips Nv | Electric discharge tube. |
GB563784A (en) * | 1943-02-24 | 1944-08-30 | Standard Telephones Cables Ltd | Improvements in or relating to the sealing of wires into glass |
-
1934
- 1934-04-19 US US721270A patent/US2153404A/en not_active Expired - Lifetime
-
1935
- 1935-04-16 DE DEA75820D patent/DE732225C/en not_active Expired
- 1935-04-16 GB GB11758/35A patent/GB439927A/en not_active Expired
- 1935-04-17 FR FR788922D patent/FR788922A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US2153404A (en) | 1939-04-04 |
DE732225C (en) | 1943-03-11 |
GB439927A (en) | 1935-12-17 |
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