GB1505563A - Dual beam crt - Google Patents

Dual beam crt

Info

Publication number
GB1505563A
GB1505563A GB20776/75A GB2077675A GB1505563A GB 1505563 A GB1505563 A GB 1505563A GB 20776/75 A GB20776/75 A GB 20776/75A GB 2077675 A GB2077675 A GB 2077675A GB 1505563 A GB1505563 A GB 1505563A
Authority
GB
United Kingdom
Prior art keywords
plates
shield
horizontal
vertical
shielding
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
Application number
GB20776/75A
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.)
Tektronix Inc
Original Assignee
Tektronix Inc
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 Tektronix Inc filed Critical Tektronix Inc
Publication of GB1505563A publication Critical patent/GB1505563A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H01J31/10—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
    • H01J31/12—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes with luminescent screen
    • H01J31/121—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes with luminescent screen tubes for oscillography
    • 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)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
  • Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)

Abstract

1505563 Cathode ray display tube TEKTRONIX Inc 16 May 1975 [5 July 1974] 20776/75 Heading H1D A cathode ray tube comprises two side-byside parallel guns in the horizontal plane, independent pairs of horizontal plates 40, 41 and independent vertical deflection means 32, 33 for each gun, the axis of symmetry of each pair of horizontal deflection plates converging to the central axis, and beam centring plates 36, 37 between the vertical and horizontal plates directing the beams through the horizontal plates so that the electrical and physical centres of the deflection members coincide. For operation above 150 MHz, the vertical deflection means is delay line apparatus as in U.S. patent Specification 3,694,689. Fig. 1 also includes glass or ceramic envelope 12, phosphor screen 14 with A1 coating 18, focussing anodes 28, 29, mounting and shielding member 50 at near ground potential shielding the vertical plates from h.v. p.d.a. anode 54, and scan expansion mesh 58 ensuring full overlap operation of the two beams. Arcuate configurations of plates 36, 37 corrects vertical trace bowing by the mesh (Fig. 2, not shown). Additional control is possible by variable potentials to compensator plates 70, 71 to compensate for part tolerances and misalignment. Plate 75 prevent interference between plate pairs 32, 33, and intergun shield 80 prevents electrostatic field interferences and minimizes capacitance between plates 40, 41 to reduce h.f. cross-talk. Shield 80 with shields 82, 84, 85 corrects battery distortions, especially keystone type while further correction may be provided by arcuate exit edges on plates 40, 41. In Figs. 3, 4, 5 (not shown), slotted half-discs (120), (121) insulatively attached to shield (80) isolates plates 40, 41 from p.d.a. anode 54. The components may be assembled by spot-welded legs (125), mutually isolated by glass beads (128) and inner shield 82 comprises two separate insulated shield members (130), (131). The assembly is mounted between inner horizontal plate support rods (134), (136) by legs (140) spot welded to shield (80), which has scalloped edges, and embedded in the rods. Conductive paint bands (150) complete shielding and minimize capacitance. Phosphor layer 14 may also function as a storage dielectric.
GB20776/75A 1974-07-05 1975-05-16 Dual beam crt Expired GB1505563A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US486022A US3921025A (en) 1974-07-05 1974-07-05 Dual-beam CRT with vertical trace bowing correction means

Publications (1)

Publication Number Publication Date
GB1505563A true GB1505563A (en) 1978-03-30

Family

ID=23930299

Family Applications (2)

Application Number Title Priority Date Filing Date
GB8492/77A Expired GB1505564A (en) 1974-07-05 1975-05-16 Horizontal deflection apparatus
GB20776/75A Expired GB1505563A (en) 1974-07-05 1975-05-16 Dual beam crt

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB8492/77A Expired GB1505564A (en) 1974-07-05 1975-05-16 Horizontal deflection apparatus

Country Status (7)

Country Link
US (1) US3921025A (en)
JP (1) JPS5117658A (en)
CA (1) CA1044745A (en)
DE (1) DE2529505C2 (en)
FR (1) FR2277431A1 (en)
GB (2) GB1505564A (en)
NL (1) NL7506542A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3008893A1 (en) * 1979-03-09 1980-09-11 Rca Corp CATHODE RAY TUBE

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52124854A (en) * 1976-04-12 1977-10-20 Mitsubishi Electric Corp Braun tube and its production
JPS52124855A (en) * 1976-04-12 1977-10-20 Mitsubishi Electric Corp Cathode-ray tube
JPS52136550U (en) * 1976-04-12 1977-10-17
JPS52137762U (en) * 1976-04-13 1977-10-19
DE2804029A1 (en) * 1978-01-31 1979-08-02 Licentia Gmbh CRT with two beam electron gun - has such gun position that beams are inclined to tube axis and when not deflected intersect it at screen
JPS5834789A (en) * 1981-08-25 1983-03-01 富士通フアナツク株式会社 Hand for industrial robot
US4585976A (en) * 1982-01-19 1986-04-29 Hewlett-Packard Company Beam penetration CRT with internal automatic constant deflection factor and pattern correction
US5087867A (en) * 1991-02-25 1992-02-11 International Business Machines Corporation Motor driving apparatus and printer
US5621276A (en) * 1992-05-01 1997-04-15 Magma, Inc. Cathode ray tube
US6369498B1 (en) * 1999-11-03 2002-04-09 Intel Corporation Electron gun for addressing secondary emission targets

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2170944A (en) * 1937-05-29 1939-08-29 Bell Telephone Labor Inc Multicathode ray discharge device
US2728873A (en) * 1953-01-13 1955-12-27 Gen Dynamics Corp Cathode ray control apparatus
FR1115673A (en) * 1954-12-02 1956-04-27 Csf Improvements to post-acceleration bi-curve oscilloscopes
DE1001404B (en) * 1955-12-06 1957-01-24 Philips Patentverwaltung Electron beam tubes for displaying two or more processes
US2939982A (en) * 1957-10-02 1960-06-07 Gen Dynamics Corp Cathode ray tube apparatus
GB1165002A (en) * 1965-09-25 1969-09-24 Emi Ltd Improvements relating to Cathode Ray Tubes and Focusing and Deflecting Arrangements Therefor.
FR2056162A5 (en) * 1969-07-28 1971-05-14 Tektronix Inc
US3681645A (en) * 1969-09-15 1972-08-01 Fairchild Camera Instr Co Cathode-ray character-display tube
US3670199A (en) * 1970-04-06 1972-06-13 Tektronix Inc Cathode ray tube having auxiliary deflection plate to correct pincushion distortion
US3694689A (en) * 1971-02-24 1972-09-26 Tektronix Inc Electron beam deflection apparatus
US3819984A (en) * 1973-02-12 1974-06-25 Tektronix Inc Side-by-side dual gun crt having horizontal deflector plates provided with side shields for correction of geometric distortion

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3008893A1 (en) * 1979-03-09 1980-09-11 Rca Corp CATHODE RAY TUBE

Also Published As

Publication number Publication date
JPS5117658A (en) 1976-02-12
NL7506542A (en) 1976-01-07
CA1044745A (en) 1978-12-19
FR2277431B1 (en) 1978-09-01
FR2277431A1 (en) 1976-01-30
DE2529505A1 (en) 1976-01-29
US3921025A (en) 1975-11-18
JPS5543577B2 (en) 1980-11-07
DE2529505C2 (en) 1985-03-07
GB1505564A (en) 1978-03-30

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee