GB669383A - Improvements in or relating to electric discharge tubes with focused beams - Google Patents
Improvements in or relating to electric discharge tubes with focused beamsInfo
- Publication number
- GB669383A GB669383A GB28913/46A GB2891346A GB669383A GB 669383 A GB669383 A GB 669383A GB 28913/46 A GB28913/46 A GB 28913/46A GB 2891346 A GB2891346 A GB 2891346A GB 669383 A GB669383 A GB 669383A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mirror
- electric discharge
- screen
- construction shown
- curvature
- 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
- 238000010276 construction Methods 0.000 abstract 3
- 230000005684 electric field Effects 0.000 abstract 1
- 230000000750 progressive effect Effects 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
- H01J29/58—Arrangements for focusing or reflecting ray or beam
- H01J29/60—Mirrors
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D1/00—Sinking shafts
- E21D1/10—Preparation of the ground
- E21D1/16—Preparation of the ground by petrification
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J21/00—Vacuum tubes
- H01J21/02—Tubes with a single discharge path
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J31/00—Cathode ray tubes; Electron beam tubes
- H01J31/02—Cathode ray tubes; Electron beam tubes having one or more output electrodes which may be impacted selectively by the ray or beam, and onto, from, or over which the ray or beam may be deflected or de-focused
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
- Transforming Electric Information Into Light Information (AREA)
Abstract
669,383. Electric discharge tubes. PHILIPS LAMPS, Ltd. Sept. 27, 1946 [May 7, 1943], No. 28913/46. Class 39 (i). An electric discharge tube in which an astigmatic beam of electrons is focused by means of a cylindrical or prismatic electron mirror so that it converges upon an anode, collecting electrode or fluorescent screen, its point of incidence thereon being controlled by means of a variable electric field, is characterized in that the focal length of the mirror increases progressively from one end of the mirror to the other and that foci of the mirror lie both behind and in front of the anode, collecting electrode or fluorescent screen. The progressive increase in focal length may be continuous or discontinuous, the mirror comprising a series of component curved surfaces whose curvature is constant in each component surface. The mirror may comprise a series of flat portions tangential to a curved surface having the requisite progressively increasing curvature. In the construction shown in Fig. 5 the deflection is varied by varying the potential of the electron mirror 1. In the construction shown in Fig. 6 two anodes 5, 6 are provided and control deflection of the beam is produced by the electrodes 7. In the construction shown in Fig. 7 electrons emitted by the cathode 8 are formed into a beam directed on to a fluorescent screen 10 by the mirror 9. Deflecting electrodes 11 cause the beam to sweep to and fro over the screen 10, a sharp boundary between light and dark on the screen being produced owing to the curvature of the mirror 9.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL240902X | 1943-05-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB669383A true GB669383A (en) | 1952-04-02 |
Family
ID=19780533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB28913/46A Expired GB669383A (en) | 1943-05-07 | 1946-09-27 | Improvements in or relating to electric discharge tubes with focused beams |
Country Status (6)
| Country | Link |
|---|---|
| BE (1) | BE455669A (en) |
| CH (1) | CH240902A (en) |
| DE (1) | DE852424C (en) |
| FR (1) | FR904112A (en) |
| GB (1) | GB669383A (en) |
| NL (1) | NL72026C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1217505B (en) * | 1960-02-15 | 1966-05-26 | Telefunken Patent | Electron beam tube with a large fluorescent screen and an electron mirror arrangement |
-
0
- BE BE455669D patent/BE455669A/xx unknown
- NL NL72026D patent/NL72026C/xx active
-
1944
- 1944-05-03 DE DEN2183D patent/DE852424C/en not_active Expired
- 1944-05-05 CH CH240902D patent/CH240902A/en unknown
- 1944-05-06 FR FR904112D patent/FR904112A/en not_active Expired
-
1946
- 1946-09-27 GB GB28913/46A patent/GB669383A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR904112A (en) | 1945-10-26 |
| NL72026C (en) | |
| BE455669A (en) | |
| DE852424C (en) | 1952-10-16 |
| CH240902A (en) | 1946-01-31 |
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