GB481549A - Cathode ray discharge devices - Google Patents
Cathode ray discharge devicesInfo
- Publication number
- GB481549A GB481549A GB10914/37A GB1091437A GB481549A GB 481549 A GB481549 A GB 481549A GB 10914/37 A GB10914/37 A GB 10914/37A GB 1091437 A GB1091437 A GB 1091437A GB 481549 A GB481549 A GB 481549A
- Authority
- GB
- United Kingdom
- Prior art keywords
- anode
- projection
- aperture
- cathode
- class
- 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
- 239000011248 coating agent Substances 0.000 abstract 2
- 238000000576 coating method Methods 0.000 abstract 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 1
- 229910052799 carbon Inorganic materials 0.000 abstract 1
- 239000011521 glass Substances 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
- H01J29/48—Electron guns
- H01J29/488—Schematic arrangements of the electrodes for beam forming; Place and form of the elecrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
- H01J29/48—Electron guns
Landscapes
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
Abstract
481,549. Cathode-ray tubes. STANDARD TELEPHONES & CABLES, Ltd. April 16, 1937, No. 10914. Convention date, Aug. 20, 1936. [Class 39 (i)] In a cathode-ray tube the beam defining aperture is formed by a doubly-convergent projection 20 on the anode 19, which has a disc 21 on its end ; the projection may be toroidal or of other form in cross section, the aperture 23 being of the same order as to size as the opening 18 in the control electrode 16. As shown any secondaries formed by primary impact on the projection 20 are collected on that projection so that there is a field free space within the aperture. A carbon coating 22 acts as a further accelerating anode at a higher potential than the anode 14, which is at the same or higher potential than the control cylinder. Contact is made to the coating 22 by one or more turns of wire 35 which is connected to a lead 36. Deflecting plates 27, 28 are carried from the pinch by leads 33, 34 encased in glass. An auxiliary cylindrical anode at the potential of the anode 19 may be used between the deflecting plates and the end of the anode 19. The beam scans a light - sensitive target 6 which receives a focused picture of an object 13. A fluorescent screen 11 is carried by a rotatable support 9 and is used in setting up the tube to determine the potentials to be applied to the anodes for the best results, or can be used for oscillograph purposes ; when the biassing has been fixed the support 9 is rotated by magnetic means and the screen is moved out of the way of the beam. British Specification 206,081, [Class 39 (i)], and U.S.A. Specification 1,613,954 are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US96925A US2185283A (en) | 1936-08-20 | 1936-08-20 | Cathode ray discharge device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB481549A true GB481549A (en) | 1938-03-14 |
Family
ID=22259753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB10914/37A Expired GB481549A (en) | 1936-08-20 | 1937-04-16 | Cathode ray discharge devices |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2185283A (en) |
| FR (1) | FR822037A (en) |
| GB (1) | GB481549A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB749058A (en) * | 1952-12-24 | 1956-05-16 | Cathodeon Ltd | Improvements in or relating to television pick-up tubes |
| US3143681A (en) * | 1959-12-07 | 1964-08-04 | Gen Electric | Spiral electrostatic electron lens |
-
1936
- 1936-08-20 US US96925A patent/US2185283A/en not_active Expired - Lifetime
-
1937
- 1937-04-16 GB GB10914/37A patent/GB481549A/en not_active Expired
- 1937-05-20 FR FR822037D patent/FR822037A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2185283A (en) | 1940-01-02 |
| FR822037A (en) | 1937-12-18 |
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