GB411120A - Improvements in or relating to cathode ray or braun tubes - Google Patents
Improvements in or relating to cathode ray or braun tubesInfo
- Publication number
- GB411120A GB411120A GB33933/32A GB3393332A GB411120A GB 411120 A GB411120 A GB 411120A GB 33933/32 A GB33933/32 A GB 33933/32A GB 3393332 A GB3393332 A GB 3393332A GB 411120 A GB411120 A GB 411120A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cathode
- area
- distance
- concentrating
- nov
- 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
- 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
Landscapes
- Electron Sources, Ion Sources (AREA)
- Electrodes For Cathode-Ray Tubes (AREA)
Abstract
411,120. Cathode-ray tubes. TELEFUNKEN GES. FUR DRAHTLOSE TELEGRAPHIE, 12, Hallesches Ufer, Berlin. Nov. 30, 1932, No. 33933. Convention date, Nov. 30,1931. [Class 39 (i).] In cathode-ray tubes in which the cathode body K is large compared with its emissive area o and is too large to be regarded as a point as regards its effect on the electrostatic lines of force, the concentrating effect of a negativelybiassed concentrating electrode, such as a Wehnelt cylinder H around the cathode K or an apertured flat or curved surface between the cathode K and the anode A, is improved by making the distance b of the area o from the aperture in the concentrating electrode adjacent the anode A greater than the squareroot of the cross-sectional area of the cathode K in a plane through the area o at right angles to the axis of the tube. Preferred dimensions are specified. If the cathode K is cylindrical, the distance b is greater than the diameter of the cathode. As described in Specifications 392,781 and 395,882, the distance b is less than the radius of the cylinder H or of the aperture in the flat concentrating electrode. The cathode may be indirectly heated by heat conduction or radiation or by electron bombardment.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE411120X | 1931-11-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB411120A true GB411120A (en) | 1934-05-30 |
Family
ID=6428984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB33933/32A Expired GB411120A (en) | 1931-11-30 | 1932-11-30 | Improvements in or relating to cathode ray or braun tubes |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2003301A (en) |
| GB (1) | GB411120A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2467224A (en) * | 1948-02-21 | 1949-04-12 | Rca Corp | Neutralization of electrostatic charges in electron-optical instruments |
| US6970641B1 (en) * | 2000-09-15 | 2005-11-29 | Opentv, Inc. | Playback of interactive programs |
| US8998918B2 (en) * | 2008-02-12 | 2015-04-07 | Amir Jamali | Device and method for allograft and tissue engineered osteochondral graft surface matching, preparation, and implantation |
| US8439921B2 (en) * | 2008-02-12 | 2013-05-14 | Amir Jamali | Device and method for allograft total hip arthroplasty |
-
1932
- 1932-09-17 US US633556A patent/US2003301A/en not_active Expired - Lifetime
- 1932-11-30 GB GB33933/32A patent/GB411120A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2003301A (en) | 1935-06-04 |
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