NL58984C - - Google Patents
Info
- Publication number
- NL58984C NL58984C NL58984DA NL58984C NL 58984 C NL58984 C NL 58984C NL 58984D A NL58984D A NL 58984DA NL 58984 C NL58984 C NL 58984C
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/025—Associated optical elements
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/16—Cooling; Preventing overheating
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J7/00—Details not provided for in the preceding groups and common to two or more basic types of discharge tubes or lamps
- H01J7/24—Cooling arrangements; Heating arrangements; Means for circulating gas or vapour within the discharge space
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Fastening Of Light Sources Or Lamp Holders (AREA)
- Discharge Lamps And Accessories Thereof (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL631733X | 1943-03-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL58984C true NL58984C (enrdf_load_html_response) |
Family
ID=19788755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL58984D NL58984C (enrdf_load_html_response) | 1943-03-04 |
Country Status (3)
| Country | Link |
|---|---|
| FR (1) | FR902364A (enrdf_load_html_response) |
| GB (1) | GB631733A (enrdf_load_html_response) |
| NL (1) | NL58984C (enrdf_load_html_response) |
-
0
- NL NL58984D patent/NL58984C/xx active
-
1944
- 1944-03-02 FR FR902364D patent/FR902364A/fr not_active Expired
-
1946
- 1946-08-22 GB GB25085/46A patent/GB631733A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR902364A (fr) | 1945-08-29 |
| GB631733A (en) | 1949-11-09 |