GB375639A - Improvements in or relating to photo-electric cells - Google Patents
Improvements in or relating to photo-electric cellsInfo
- Publication number
- GB375639A GB375639A GB27341/31A GB2734131A GB375639A GB 375639 A GB375639 A GB 375639A GB 27341/31 A GB27341/31 A GB 27341/31A GB 2734131 A GB2734131 A GB 2734131A GB 375639 A GB375639 A GB 375639A
- Authority
- GB
- United Kingdom
- Prior art keywords
- screen
- photo
- electric
- fluorescent
- layer
- 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
- H01J31/00—Cathode ray tubes; Electron beam tubes
- H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
- H01J31/50—Image-conversion or image-amplification tubes, i.e. having optical, X-ray, or analogous input, and optical output
Landscapes
- Luminescent Compositions (AREA)
- Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
Abstract
375,639. Photo-electric cells. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN, 13D, Emmasingel, Eindhoven, Holland. Oct. 1, 1931, No. 27341. Convention date, Oct. 1, 1930. [Class 39 (i).] In a photo-electric cell, particularly for photography, having a photo-electric electrode and an electrode consisting at least in part of a fluorescent substance, a screen, arranged between the electrodes, allows the passage of electrons but not of fluorescent rays. As shown in Fig. 1, the cathode 5 consists of an alkali metal such as caesium deposited on a thin transparent layer 4 of calcium fluoride. The anode 8 consists of a fluorescent substance such as zinc sulphide, willemite (zinc silicate), scheelite (calcium tungstate), or barium platinocyanide applied to a layer 7 of metal such as platinum, transparent to fluorescent rays, for example by evaporation in a vacuum ; the conductivity of the layer may be improved by the inclusion of conducting particles. The screen 10 consists of a sheet of black paper in a metal frame. In the cell shown in Fig. 2, the screen 16 consists of a thin metal plate which may be connected by a switch 19 so that a positive or negative potential may be applied to the screen in order to accelerate or retard the passage of electrons. A shaft 23, carrying a drum for a film 22, is provided with lugs 24 engaging with a lever 25 to operate the switch 19 at intervals, so as to apply a positive potential to the screen during the periods when the film is exposed to the fluorescent rays, and a negative potential for other periods. Specifications 326,200, [Class 39 (i), Electric lamps, Arc &c.], and 366,883 also are referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL375639X | 1930-10-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB375639A true GB375639A (en) | 1932-06-30 |
Family
ID=19785585
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB27341/31A Expired GB375639A (en) | 1930-10-01 | 1931-10-01 | Improvements in or relating to photo-electric cells |
Country Status (3)
Country | Link |
---|---|
BE (1) | BE383055A (en) |
FR (1) | FR724155A (en) |
GB (1) | GB375639A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2549546A (en) * | 1947-10-24 | 1951-04-17 | Albert G Thomas | Photographic electrical copying device |
US2692178A (en) * | 1948-04-30 | 1954-10-19 | Onera (Off Nat Aerospatiale) | Method and material for graphical registering or direct recording |
US2845348A (en) * | 1952-01-04 | 1958-07-29 | Kallman Hartmut | Electro-photographic means and method |
-
0
- BE BE383055D patent/BE383055A/xx unknown
-
1931
- 1931-10-01 FR FR724155D patent/FR724155A/en not_active Expired
- 1931-10-01 GB GB27341/31A patent/GB375639A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2549546A (en) * | 1947-10-24 | 1951-04-17 | Albert G Thomas | Photographic electrical copying device |
US2692178A (en) * | 1948-04-30 | 1954-10-19 | Onera (Off Nat Aerospatiale) | Method and material for graphical registering or direct recording |
US2845348A (en) * | 1952-01-04 | 1958-07-29 | Kallman Hartmut | Electro-photographic means and method |
Also Published As
Publication number | Publication date |
---|---|
FR724155A (en) | 1932-04-22 |
BE383055A (en) |
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