GB716813A - Improvements in or relating to a beam-shaping assembly in a cathode ray tube - Google Patents
Improvements in or relating to a beam-shaping assembly in a cathode ray tubeInfo
- Publication number
- GB716813A GB716813A GB5490/52A GB549052A GB716813A GB 716813 A GB716813 A GB 716813A GB 5490/52 A GB5490/52 A GB 5490/52A GB 549052 A GB549052 A GB 549052A GB 716813 A GB716813 A GB 716813A
- Authority
- GB
- United Kingdom
- Prior art keywords
- aperture
- apertures
- electrode
- ray tube
- cathode ray
- 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
Landscapes
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
Abstract
716,813. Electron beam apparatus. INTERNATIONAL BUSINESS MACHINES CORPORATION. March 3, 1952 [June 29, 1951], No. 5490/52. Class 39(1) A cathode ray tube has beam forming means comprising a first electrode 17 with first and second apertures, a second electrode 20 having a third aperture and a third electrode 22 with a fourth aperture, the axial spacing between the first and third aperture closely approximating 12 times the diameter of the said first aperture and/or the axial spacing between the third aperture and the fluorescent screen of the tubes being about 2.67 times the axial spacing between the first and third apertures. The diameters of the first, second, third and fourth aperture and the spacings between the first and third apertures and between the third aperture and the screen vary by not more than 25 per cent from the ratios 100, 16, 130, 20, 1200 and 3250. The axial dimension of the deflecting plates 24, 26 is about 31 times the diameter of the second aperture. The ratio of the parallel spacing of the deflection plates and the axial dimension thereof is 3:5. The control grid 16 encloses the cathode and heater assembly. Further dimensions, voltages and deflection sensitivities for a digital storage tube are given in the Specification.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US716813XA | 1951-06-29 | 1951-06-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB716813A true GB716813A (en) | 1954-10-13 |
Family
ID=22102893
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5490/52A Expired GB716813A (en) | 1951-06-29 | 1952-03-03 | Improvements in or relating to a beam-shaping assembly in a cathode ray tube |
Country Status (2)
Country | Link |
---|---|
BE (1) | BE512479A (en) |
GB (1) | GB716813A (en) |
-
0
- BE BE512479D patent/BE512479A/xx unknown
-
1952
- 1952-03-03 GB GB5490/52A patent/GB716813A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
BE512479A (en) |
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