CH217624A - Einrichtung zum Anzeigen der Brenndauer von elekrischen Glühlampen, Glühkathodenröhren und dergl. - Google Patents
Einrichtung zum Anzeigen der Brenndauer von elekrischen Glühlampen, Glühkathodenröhren und dergl.Info
- Publication number
- CH217624A CH217624A CH217624DA CH217624A CH 217624 A CH217624 A CH 217624A CH 217624D A CH217624D A CH 217624DA CH 217624 A CH217624 A CH 217624A
- Authority
- CH
- Switzerland
- Prior art keywords
- displaying
- incandescent lamps
- hot cathode
- burning time
- cathode tubes
- Prior art date
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
- H01J9/42—Measurement or testing during manufacture
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE217624X | 1937-07-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH217624A true CH217624A (de) | 1941-10-31 |
Family
ID=5830861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH217624D CH217624A (de) | 1937-07-12 | 1938-07-12 | Einrichtung zum Anzeigen der Brenndauer von elekrischen Glühlampen, Glühkathodenröhren und dergl. |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE429096A (fr) |
| CH (1) | CH217624A (fr) |
| FR (1) | FR840585A (fr) |
| GB (1) | GB501252A (fr) |
| NL (1) | NL54814C (fr) |
-
0
- NL NL54814D patent/NL54814C/xx active
- BE BE429096D patent/BE429096A/xx unknown
-
1938
- 1938-07-09 GB GB20398/38A patent/GB501252A/en not_active Expired
- 1938-07-12 FR FR840585D patent/FR840585A/fr not_active Expired
- 1938-07-12 CH CH217624D patent/CH217624A/de unknown
Also Published As
| Publication number | Publication date |
|---|---|
| BE429096A (fr) | |
| FR840585A (fr) | 1939-04-27 |
| GB501252A (en) | 1939-02-23 |
| NL54814C (fr) |
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