GB431902A - An apparatus for observing the carbons in projection arc lamps - Google Patents
An apparatus for observing the carbons in projection arc lampsInfo
- Publication number
- GB431902A GB431902A GB3485934A GB3485934A GB431902A GB 431902 A GB431902 A GB 431902A GB 3485934 A GB3485934 A GB 3485934A GB 3485934 A GB3485934 A GB 3485934A GB 431902 A GB431902 A GB 431902A
- Authority
- GB
- United Kingdom
- Prior art keywords
- carbons
- observing
- reflector
- lenses
- mirror
- 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
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B31/00—Electric arc lamps
- H05B31/003—Electric arc lamps of a special type
- H05B31/0036—Electric arc lamps of a special type for projection, copying or stage lighting
Landscapes
- Lenses (AREA)
Abstract
431,902. Projection lamps. DEHN, F. B., 103, Kingsway, London.-(Zeiss Ikon Akt.-Ges. ; 72, Schandauerstrasse, Dresden, Germany) Dec. 4, 1934, No. 34859. [Class 75 (iv)] In a kinematograph or like projection arc lamp, means are provided for observing the front of the crater of the positive carbon. Additional means may be provided for observing the carbons from the side. In the form shown, light rays from the crater of the positive carbon 1 pass through an unsilvered portion 3 of the reflector 4, and, by means of inclined mirrors 5, 7, 9 and lenses 6, 8, produce an image 10 on a screen 11 at the front of the lamp casing 12. Similarly an image 18 of the side of the carbons is formed on the same screen 11 by means of inclined mirrors 15, 17 and lenses 14, 16. The mirror 7 reflects the rays along under the cover of the lamp casing, whilst the mirror 15 reflects the rays between the double walls 19, 20 of the lamp casing. The mirror 5 and the lenses 6, 14 may be fixedly connected to the mounting of the reflector 4, and an image of the picture window may be marked on the screen 11. By this means the are and the reflector 4 may be positioned correctly with respect to the actual picture window.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3485934A GB431902A (en) | 1934-12-04 | 1934-12-04 | An apparatus for observing the carbons in projection arc lamps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3485934A GB431902A (en) | 1934-12-04 | 1934-12-04 | An apparatus for observing the carbons in projection arc lamps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB431902A true GB431902A (en) | 1935-07-17 |
Family
ID=10370784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3485934A Expired GB431902A (en) | 1934-12-04 | 1934-12-04 | An apparatus for observing the carbons in projection arc lamps |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB431902A (en) |
-
1934
- 1934-12-04 GB GB3485934A patent/GB431902A/en not_active Expired
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