GB729127A - Improvements in or relating to cathode-ray tubes and apparatus embodying cathode-raytubes - Google Patents
Improvements in or relating to cathode-ray tubes and apparatus embodying cathode-raytubesInfo
- Publication number
- GB729127A GB729127A GB27779/51A GB2777951A GB729127A GB 729127 A GB729127 A GB 729127A GB 27779/51 A GB27779/51 A GB 27779/51A GB 2777951 A GB2777951 A GB 2777951A GB 729127 A GB729127 A GB 729127A
- Authority
- GB
- United Kingdom
- Prior art keywords
- anode
- cathode
- screen
- grid
- overlap
- 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
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 abstract 2
- 229910001887 tin oxide Inorganic materials 0.000 abstract 2
- 229920002160 Celluloid Polymers 0.000 abstract 1
- 239000004020 conductor Substances 0.000 abstract 1
- 238000005286 illumination Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K29/00—Pulse counters comprising multi-stable elements, e.g. for ternary scale, for decimal scale; Analogous frequency dividers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J19/00—Details of vacuum tubes of the types covered by group H01J21/00
-
- 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
- H01J31/04—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 with only one or two output electrodes with only two electrically independant groups or electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2893/00—Discharge tubes and lamps
- H01J2893/0001—Electrodes and electrode systems suitable for discharge tubes or lamps
- H01J2893/001—Non-constructive schematic arrangements
Landscapes
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
Abstract
729,127. Cathode-ray tubes. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Nov. 27, 1951 [Nov. 30, 1950], No. 27779/51. Class 39 (1). In a cathode-ray tube of the kind in which a ribbon beam can be deflected into a plurality of stable positions where it is held by current division between two electrodes 4 and 6, the electrons of the beam after being deflected by plates 2 are brought to a plurality of line foci which lie in the plane of the slotted collector 4 and overlap the edges of the slots therein, by means of two aligned grids 3, 5 which are composed of wires lying parallel to the direction of deflection and which are held at or near cathode potential, and then diverge from the line foci to overlap as indicated so that the portion of the beam which passes through the perforated anode 6 gives substantially uniform illumination on the luminescent screen 9. In Fig. 1, the device has deflection plates 2, grid 3 at zero (cathode) or low potential which collects secondaries from slotted screen 4 and, after screen 4, grid 5 at cathode or low potential whose wires are in the shadow of those of grid 3, both sets of wires extending parallel to the direction of deflection. This is followed by multi-apertured output anode 6 the apertures of which are covered by gauze 7 to allow less than 20 par cent, e.g. 8-10 per cent, of the beam current to pass, post-acceleration anode 8, fluorescent screen 9 and a transparent conductive layer 10 of tin oxide between 9 and the tube wall 11 which is connected by spring or other conductor 13 to 8. A mask 12 of photographically blackened celluloid with transparent numerals or other symbols thereon is attached to the tube wall. Grid 3 splits up the beam into a number of strips which are individually focused to line foci 1 in the vicinity of slotted screen 4 and then diverge so as to overlap, so that the image on the fluorescent screen is uniformly bright and free from shadows. Stray and excessively deflected edge electrons are collected by gauze 7. Postacceleration anode 8, whose slots are in register with those in anode 6, collects secondary electrons from screen 9 which tends to go more positive. If tin oxide layer 10 and the screen 9 are sufficiently conductive, anode 8 may be dispensed with. Dimensions and potentials of an example are given. The slots in anode 6 and in post-acceleration anode 8 may be staggered as described in Specification 669,236. The devices are used for counting pulses. Specification 684,552 [Group XL(c)] also is referred to..
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL297600X | 1950-11-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB729127A true GB729127A (en) | 1955-05-04 |
Family
ID=19783054
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB27779/51A Expired GB729127A (en) | 1950-11-30 | 1951-11-27 | Improvements in or relating to cathode-ray tubes and apparatus embodying cathode-raytubes |
Country Status (7)
Country | Link |
---|---|
US (1) | US2642547A (en) |
BE (1) | BE507439A (en) |
CH (1) | CH297600A (en) |
DE (1) | DE865766C (en) |
FR (1) | FR1056092A (en) |
GB (1) | GB729127A (en) |
NL (1) | NL73328C (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1081918B (en) * | 1954-12-23 | 1960-05-19 | Philips Nv | Device for position selection or scanning |
US3136918A (en) * | 1960-12-16 | 1964-06-09 | Rca Corp | Cathode ray tube and method of operation |
US3151270A (en) * | 1961-03-31 | 1964-09-29 | Bell Telephone Labor Inc | Electron ribbon beam encoder tube with beam tilt control |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2449339A (en) * | 1945-11-13 | 1948-09-14 | Rca Corp | Cathode-ray tube |
NL76624C (en) * | 1948-09-30 | |||
NL146835B (en) * | 1949-06-04 | Boehringer Mannheim Gmbh | METHOD OF PREPARING A MEDICINAL COMPOUND WITH CORONAR DILATORIC ACTION. |
-
0
- NL NL73328D patent/NL73328C/xx active
- BE BE507439D patent/BE507439A/xx unknown
-
1951
- 1951-11-21 US US257512A patent/US2642547A/en not_active Expired - Lifetime
- 1951-11-27 GB GB27779/51A patent/GB729127A/en not_active Expired
- 1951-11-28 FR FR1056092D patent/FR1056092A/en not_active Expired
- 1951-11-28 DE DEN4750A patent/DE865766C/en not_active Expired
- 1951-11-28 CH CH297600D patent/CH297600A/en unknown
Also Published As
Publication number | Publication date |
---|---|
US2642547A (en) | 1953-06-16 |
DE865766C (en) | 1953-02-05 |
NL73328C (en) | |
CH297600A (en) | 1954-03-31 |
BE507439A (en) | |
FR1056092A (en) | 1954-02-24 |
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