GB878219A - Improvements in or relating to cathode ray tubes - Google Patents

Improvements in or relating to cathode ray tubes

Info

Publication number
GB878219A
GB878219A GB8048/58A GB804858A GB878219A GB 878219 A GB878219 A GB 878219A GB 8048/58 A GB8048/58 A GB 8048/58A GB 804858 A GB804858 A GB 804858A GB 878219 A GB878219 A GB 878219A
Authority
GB
United Kingdom
Prior art keywords
electrode
aperture
auxiliary electrode
foraminated
march
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
GB8048/58A
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.)
Rauland Borg Corp
Original Assignee
Rauland Borg Corp
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 Rauland Borg Corp filed Critical Rauland Borg Corp
Publication of GB878219A publication Critical patent/GB878219A/en
Expired legal-status Critical Current

Links

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
    • H01J29/62—Electrostatic lenses
    • 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
    • H01J29/52—Arrangements for controlling intensity of ray or beam, e.g. for modulation

Landscapes

  • Electrodes For Cathode-Ray Tubes (AREA)

Abstract

878,219. Cathode-ray tubes. RAULAND CORPORATION. March 13, 1958 [March 13, 1957], No. 8048/58. Class 39(1). A high-transconductance gun for a cathoderay tube with a multi-apertured space-charge and control grid 16 has an auxiliary electrode 21 for converging the beam to a cross-over in the space between-the auxiliary electrode and the accelerator electrode system 24, 25. The image of the cross-over is focused on the screen electrostatically or magnetically; as shown a unipotential lens system 26, 27, 28 is used. The multi-foraminated aperture may be comprised by a mesh grid, co-planar with the surface of the control electrode or disposed on either side of it, or the aperture may be comprised by solid part of the control electrode which is pierced by a number of small apertures. The area of the emissive surface of the cathode preferably equals the area of the multi-foraminated aperture 18. In the embodiment of Fig. 4 the auxiliary electrode is a flat washer electrode 41 fixed to the front surface of the control electrode 16 and held permanently at the same potential. A suitable effective spacing between the two electrodes is achieved by reducing the thickness of one or both electrodes in the vicinity of the aperture 18. An off-set gun may be used for iontrapping.
GB8048/58A 1957-03-13 1958-03-13 Improvements in or relating to cathode ray tubes Expired GB878219A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US645813A US2975315A (en) 1957-03-13 1957-03-13 Cathode-ray tube

Publications (1)

Publication Number Publication Date
GB878219A true GB878219A (en) 1961-09-27

Family

ID=24590586

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8048/58A Expired GB878219A (en) 1957-03-13 1958-03-13 Improvements in or relating to cathode ray tubes

Country Status (2)

Country Link
US (1) US2975315A (en)
GB (1) GB878219A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2337152A (en) * 1998-05-09 1999-11-10 Eev Ltd Electron gun assembly

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL265121A (en) * 1961-05-24
NL285641A (en) * 1961-11-20
US3374379A (en) * 1964-03-02 1968-03-19 Nippon Columbia Low second grid voltage electron gun
DE1514919A1 (en) * 1966-01-28 1969-06-26 Telefunken Patent Cathode ray tube
US3564320A (en) * 1969-09-29 1971-02-16 Kentucky Electronics Inc Electrode mounting structure for cathode ray tubes
FR2201536B1 (en) * 1972-09-26 1976-08-13 Thomson Csf
JPS5522906B2 (en) * 1974-05-20 1980-06-19
US4298818A (en) * 1979-08-29 1981-11-03 Rca Corporation Electron gun
US4558253A (en) * 1983-04-18 1985-12-10 Rca Corporation Color picture tube having an inline electron gun with asymmetric focusing lens
US4528476A (en) * 1983-10-24 1985-07-09 Rca Corporation Cathode-ray tube having electron gun with three focus lenses
EP0725973B1 (en) 1994-08-25 1998-12-30 Koninklijke Philips Electronics N.V. Cathode ray tube provided with an electron gun, and electrostatic lens system

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB505751A (en) * 1937-09-13 1939-05-15 Frederick Hermes Nicoll Improvements in or relating to cathode ray tubes
US2306663A (en) * 1938-02-05 1942-12-29 Schlesinger Kurt Net control of cathode ray tubes
US2426626A (en) * 1942-10-29 1947-09-02 Bell Telephone Labor Inc Electron discharge apparatus
US2538267A (en) * 1945-05-19 1951-01-16 Bell Telephone Labor Inc Gaseous electron discharge device
US2441254A (en) * 1945-08-04 1948-05-11 Remco Electronic Inc Symmetrical space charge tube
US2563490A (en) * 1946-01-28 1951-08-07 Cathode arrangement fob television
US2672568A (en) * 1951-03-27 1954-03-16 Int Standard Electric Corp Electron gun for cathode-ray tubes
BE513449A (en) * 1951-08-11
US2690517A (en) * 1952-09-30 1954-09-28 Rca Corp Plural beam electron gun
US2835838A (en) * 1953-07-18 1958-05-20 Philips Corp Cathode-ray tube
GB759944A (en) * 1954-03-02 1956-10-24 Gen Electric Co Ltd Improvements in or relating to electric circuit arrangements incorporating cathode ray tubes
US2877369A (en) * 1955-06-02 1959-03-10 Rca Corp Electron beam tube

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2337152A (en) * 1998-05-09 1999-11-10 Eev Ltd Electron gun assembly

Also Published As

Publication number Publication date
US2975315A (en) 1961-03-14

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