US2195470A - Cathode ray tube deflection system - Google Patents

Cathode ray tube deflection system Download PDF

Info

Publication number
US2195470A
US2195470A US128565A US12856537A US2195470A US 2195470 A US2195470 A US 2195470A US 128565 A US128565 A US 128565A US 12856537 A US12856537 A US 12856537A US 2195470 A US2195470 A US 2195470A
Authority
US
United States
Prior art keywords
cathode ray
ray tube
deflection system
tube
tube deflection
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 - Lifetime
Application number
US128565A
Other languages
English (en)
Inventor
Roosenstein Hans Otto
Paffrath Georg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telefunken AG
Original Assignee
Telefunken AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Telefunken AG filed Critical Telefunken AG
Application granted granted Critical
Publication of US2195470A publication Critical patent/US2195470A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/02—Details of the magnetic circuit characterised by the magnetic material
    • 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
    • H01J29/54—Arrangements for centring ray or beam
    • 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
    • H01J29/70—Arrangements for deflecting ray or beam
    • H01J29/72—Arrangements for deflecting ray or beam along one straight line or along two perpendicular straight lines
    • H01J29/76—Deflecting by magnetic fields only

Definitions

  • Y. is "Claims. c1. 250. 157 This-invention relates to cathode ray tubes;v
  • Figs. 1 through'e show graphically scanning wave shapes for explaining our invention
  • Fig. 5 shows schematically one embodiment of our inventionusing fixed magnets for eliminating dissymmetricaldeflectingfields
  • the invention- is concerned with simpler meansadapted to symmetricize a dissymmetric sawtoothcurve, and the same consists in disposing concentrically to the tube axisa'steel ring, pref- 10 erably anop'en winding consisting of tape or wire,- the said winding being permanently ma netized in such a way thatthe D. C.-c'omponent included inated. 15
  • Fig. 7 shows another embodiment, Le, a steel .ring consisting of an open Winding made up of square steel wire.
  • a steel hand or 60 tape or ribbon could be employed of the kind shown in Fig. 8.
  • recourse could also be had to a steel ribbon as shown'in Fig. 9, or else a solid (massive) form of 3 construction as indicated in Fig. 10.
  • Fig. 9 or Fig. 10 it must be kept in mind that there is a likelihood of .certain eddy-currents being set up as a result of the saw tooth component of the deflection field.
  • Anarrangement as here disclosed could also be used for the purpose to eliminate the influence of the D. C. component-of two pairs of coils designed to insure horizontal and vertical deflection.
  • all thatis necessary is'to magnetize the steel ring according to Figs. 6 to 10 to a sufficient extent and to so adjustthe same that the direction of the permanent field set up thereby will be opposite and contrary to the geometric sum total of the D. 'C..componentsof the two deflector fields.
  • a cathode ray tube having a cylindrical neck l portion, an electron gun mounted within the neck portion, magnetic deflecting coils positioned symmetrically about the cylindrical neck portion, and a plurality of fixed circular magnets closely adjacent each other and longitudinally'displaced, from the deflecting coils and'concentric with the circular neck'of the tube said magnets producingamagnetic field perpendicular to the axis of the cylindrical neck portion.
  • a cathode ray tube having a cylindrical. neck portion, an electron gun mounted within the neck portion, magnetic deflecting coils positioned symmetrically about the cylindrical neck portion, and a magnetized severed iron .coil closely adjacent each other and longitudinally displaced from the deflecting coils and concentric with the circular'n'eck of the tube said magnets producing a magnetic fleld perpendicular to the axis of the cylindrical neck portion.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
US128565A 1936-03-03 1937-03-02 Cathode ray tube deflection system Expired - Lifetime US2195470A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DET0046533 1936-03-03

Publications (1)

Publication Number Publication Date
US2195470A true US2195470A (en) 1940-04-02

Family

ID=7562353

Family Applications (1)

Application Number Title Priority Date Filing Date
US128565A Expired - Lifetime US2195470A (en) 1936-03-03 1937-03-02 Cathode ray tube deflection system

Country Status (3)

Country Link
US (1) US2195470A (enrdf_load_stackoverflow)
FR (1) FR818639A (enrdf_load_stackoverflow)
NL (1) NL48160C (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2440735A (en) * 1943-06-05 1948-05-04 Farnsworth Res Corp Electrooptical device
US2552341A (en) * 1949-02-03 1951-05-08 Clarostat Mfg Co Inc Magnetic structure for use in ion-traps
US2562395A (en) * 1949-02-23 1951-07-31 Motorola Inc Anastigmatic deflection yoke
US2597298A (en) * 1949-02-18 1952-05-20 Pye Ltd Beam centering device for cathoderay tubes
US2602902A (en) * 1950-02-14 1952-07-08 Bendix Aviat Corp Sweep amplitude control for magnetically deflected cathode-ray tubes
US3045140A (en) * 1959-12-31 1962-07-17 Gen Electric High resolution electron discharge device
US3098943A (en) * 1957-09-18 1963-07-23 Zenith Radio Corp Cathode ray permanent magnet beam positioner

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE506783A (enrdf_load_stackoverflow) * 1950-11-01
NL82590C (enrdf_load_stackoverflow) * 1951-04-23

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2440735A (en) * 1943-06-05 1948-05-04 Farnsworth Res Corp Electrooptical device
US2552341A (en) * 1949-02-03 1951-05-08 Clarostat Mfg Co Inc Magnetic structure for use in ion-traps
US2597298A (en) * 1949-02-18 1952-05-20 Pye Ltd Beam centering device for cathoderay tubes
US2562395A (en) * 1949-02-23 1951-07-31 Motorola Inc Anastigmatic deflection yoke
US2602902A (en) * 1950-02-14 1952-07-08 Bendix Aviat Corp Sweep amplitude control for magnetically deflected cathode-ray tubes
US3098943A (en) * 1957-09-18 1963-07-23 Zenith Radio Corp Cathode ray permanent magnet beam positioner
US3045140A (en) * 1959-12-31 1962-07-17 Gen Electric High resolution electron discharge device

Also Published As

Publication number Publication date
NL48160C (enrdf_load_stackoverflow)
FR818639A (fr) 1937-09-30

Similar Documents

Publication Publication Date Title
US2157182A (en) Cathode ray deflecting device
US2431077A (en) Cathode-ray tube with revolving magnets and adjustable sleeve
US2188579A (en) Cathode ray tube, more particularly for television purposes
US2336837A (en) Electrical apparatus
US2224933A (en) Magnetic distortion correcting means for cathode ray tubes
US2591159A (en) Magnetic means for producing compensations and other effects in a cathode-ray tube
US2195470A (en) Cathode ray tube deflection system
GB666907A (en) Improvements in and relating to cathode ray tubes
US2498354A (en) Magnetic lens system
US3020434A (en) Self shielding electron gun and cathode ray tube system including same
US4943755A (en) Magnetic shielding with constant-current coils for CRT
US2264567A (en) Deflecting device
US2605433A (en) Magnetic shield for cathode-ray apparatus
US2569343A (en) Deflection coil arrangement
US2568456A (en) Electromagnetic deflection yoke structure
GB545414A (en) Electron beam deflecting yoke
US2165803A (en) Cathode ray deflecting device
US2795717A (en) Cathode ray beam centering apparatus
US2100618A (en) Cathode ray apparatus
US3098942A (en) Magnetic centering device for cathode ray tubes
US3098943A (en) Cathode ray permanent magnet beam positioner
GB427112A (en) Improvements in or relating to television and like apparatus
US3334258A (en) Apparatus for effectively reducing overscan in a cathode ray tube
US2602902A (en) Sweep amplitude control for magnetically deflected cathode-ray tubes
GB1077412A (en) Cathode-ray tube beam controlling device