GB837102A - Improvements relating to electron guns - Google Patents

Improvements relating to electron guns

Info

Publication number
GB837102A
GB837102A GB35356/56A GB3535656A GB837102A GB 837102 A GB837102 A GB 837102A GB 35356/56 A GB35356/56 A GB 35356/56A GB 3535656 A GB3535656 A GB 3535656A GB 837102 A GB837102 A GB 837102A
Authority
GB
United Kingdom
Prior art keywords
electrode
block
cathode
intensity control
beams
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
GB35356/56A
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.)
GTE Sylvania Inc
Original Assignee
Sylvania Electric Products 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 Sylvania Electric Products Inc filed Critical Sylvania Electric Products Inc
Publication of GB837102A publication Critical patent/GB837102A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/46Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/48Electron guns
    • H01J29/50Electron guns two or more guns in a single vacuum space, e.g. for plural-ray tube
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00Details of cathode ray tubes or electron beam tubes
    • H01J2229/48Electron guns
    • H01J2229/50Plurality of guns or beams
    • H01J2229/507Multi-beam groups, e.g. number of beams greater than number of cathodes

Landscapes

  • Video Image Reproduction Devices For Color Tv Systems (AREA)
  • Electrodes For Cathode-Ray Tubes (AREA)

Abstract

837,102. Electron guns. SYLVANIA ELECTRIC PRODUCTS Inc. Nov. 19, 1956 [Nov. 25, 1955], No. 35356/56. Class 39(1). In a cathode ray monochrome or colour receiving tube the gun comprises a ceramic block having a recess housing the elongated indirectly heated cathode 34, Fig. 3, and an anode electrode plate 50 having an elongated slot 52 secured over the top of the block, the block supporting thereon, Fig. 5, or in grooves therein, Fig. 3, one or more beam splitter electrodes 42 and one or more intensity control electrodes 44, 46, the electrodes 42, 44, 46 extending across the slot 52 and the splitter electrode(s) dividing the single beam emitted by the cathode into two or more equal or unequal parts, at least one part being controlled by an intensity control electrode 44 and the beam splitter electrode(s) being in electrical contact with anode electrode plate 50. The beam parts may pass through a subsequent common electrostatic focusing lens and a magnetic scanning yoke. The ceramic block may have grooves housing 42, 44, 46 and end supports 36 for the cathode the latter supports being bonded to the block. The control electrodes 44, 46 are insulated from 42, 50. It is stated that one or both of the intensity control electrodes can be eliminated or each beam can have a separate intensity control electrode. In a modification (not illustrated) the ceramic block can be cylindrical with a central recess housing a disc cathode. By varying the thickness of the beam splitters, the spacing between the beams can be varied. In a practical method of assembly, Fig. 5, wire is wrapped in a bifilar helix, the wires of which are of different diameter around the ceramic block which has grooves for the cathode supports, as in Fig. 3. The top of the block and conductors 42, 44, 46 are painted with fret which is then removed from the top of the beam splitters 42, the electrode 50 gold plated on the underside is placed in contact with the beam splitters and the structure is fired in an oxidising atmosphere to solder the beam splitters and electrode 50 together and to bind the wires 44, 46 to the ceramic block by melting the frit. Wires 42, 44, 46 are now severed at the lower part of the block and trimmed at the upper edge, 44, 46 being trimmed at one edge only to give leads at the other ends. The particular forms shown has two intensity control electrodes and three beam splitters, the diameter of the intensity control electrode wire being less than that of the beams splitter wire. If the slot in electrode 50 is not rectangular a plurality of non coplanar beams can be produced. The gun can be used in oscilloscopes giving a plurality of test patterns simultaneously, in colour television having two or four beams. Specification 817,762 is referred to.
GB35356/56A 1955-11-25 1956-11-19 Improvements relating to electron guns Expired GB837102A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US548943A US2847597A (en) 1955-11-25 1955-11-25 Electron discharge device

Publications (1)

Publication Number Publication Date
GB837102A true GB837102A (en) 1960-06-09

Family

ID=24191018

Family Applications (1)

Application Number Title Priority Date Filing Date
GB35356/56A Expired GB837102A (en) 1955-11-25 1956-11-19 Improvements relating to electron guns

Country Status (2)

Country Link
US (1) US2847597A (en)
GB (1) GB837102A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL263646A (en) * 1960-04-16
US4121130A (en) * 1976-10-29 1978-10-17 Rca Corporation Cathode structure and method of operating the same

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2732516A (en) * 1956-01-24 speedy
GB432485A (en) * 1933-12-29 1935-07-29 Alan Dower Blumlein Improvements in and relating to television and the like systems employing cathode ray tubes
US2141415A (en) * 1935-06-20 1938-12-27 Loewe Opta Gmbh Multiple cathode-ray tube
US2256297A (en) * 1939-08-31 1941-09-16 Rca Corp Electron discharge device
US2457495A (en) * 1944-12-18 1948-12-28 Sylvania Electric Prod Ultra high frequency tube
US2506627A (en) * 1945-09-14 1950-05-09 Emi Ltd Electron discharge device
US2512858A (en) * 1945-10-25 1950-06-27 Rca Corp Electron discharge device
US2587074A (en) * 1948-09-29 1952-02-26 Rca Corp Color television image reproducing system
US2758234A (en) * 1952-11-28 1956-08-07 Loewe Opta Ag Electrode system for cathode ray tubes

Also Published As

Publication number Publication date
US2847597A (en) 1958-08-12

Similar Documents

Publication Publication Date Title
US2245581A (en) Electron discharge device
US2160797A (en) Electron discharge apparatus
US4945284A (en) Electron gun for color-picture tube device
US2752520A (en) Tri-color kinescope
EP0019975B1 (en) Colour display tube
GB1014200A (en) Improvements in or relating to electron beam guns
US2386790A (en) Electron gun and the like
US2736832A (en) Hoop electrode structure
US2638559A (en) Electrostatic lens for cathode-ray tubes
GB837102A (en) Improvements relating to electron guns
US3887837A (en) Cathode ray tube
GB757787A (en) Improvements in or relating to grid electrode structures for use in cathode ray tubeapparatus
JP2794221B2 (en) Color picture tube
US2567359A (en) Electron discharge apparatus
US4523124A (en) Cathode-ray tube having multiplate cathode unit
US3694687A (en) Electron gun with anode segments for beam position detection
GB739767A (en) Improvements in or relating to television pick-up tubes
GB731124A (en) Improvements in or relating to cathode ray tubes
US2290748A (en) Vacuum tube and method of manufacture thereof
US4609848A (en) Color cathode-ray tube with insulating rod support for electron gun
JPS6310444A (en) Color crt and color display unit
US2633553A (en) Cathode-ray oscillograph
US2527113A (en) Multitarget cathode-ray device
KR830001993B1 (en) Color sign
US2738437A (en) Color grid structure for cathode-ray tube designed for polychrome image reproduction