GB503954A - Improvements in and relating to cathode ray tubes - Google Patents

Improvements in and relating to cathode ray tubes

Info

Publication number
GB503954A
GB503954A GB19630/37A GB1963037A GB503954A GB 503954 A GB503954 A GB 503954A GB 19630/37 A GB19630/37 A GB 19630/37A GB 1963037 A GB1963037 A GB 1963037A GB 503954 A GB503954 A GB 503954A
Authority
GB
United Kingdom
Prior art keywords
cathode
electrons
anode
spot
ray tubes
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
GB19630/37A
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.)
Loewe Opta GmbH
Original Assignee
Loewe Opta GmbH
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 Loewe Opta GmbH filed Critical Loewe Opta GmbH
Publication of GB503954A publication Critical patent/GB503954A/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
    • H01J29/48—Electron guns
    • H01J29/485—Construction of the gun or of parts thereof
    • 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
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/04—Cathodes

Landscapes

  • Discharge Lamps And Accessories Thereof (AREA)

Abstract

503,954. Cathode-ray tubes. RADIOAKT.-GES. D. S. LOEWE. July 15, 1937, No. 19630. Convention date, July 16, 1936. [Class 39 (i)] Cathode-ray tubes with intensity control of the ray have a cylindrical 'cathode 3 provided with a sleeve-like projection 5.extending beyond the circular end face in which the emissive spot 4 is inlaid. Heating of the spot 4 may be improved by heat-conducting wires inlaid therein. The projection 5 amounts to about one-half of the diameter of the cathode. The diameter of the control grid aperture is approximately equal to that of the cathode and the distance between the spot 4 and the control grid 1 is approximately the same. The anode 2 has an aperture of larger diameter than that in the grid 1. When a positive or negative bias is provided on the control grid, electrons are refracted towards the axis and all the electrons of the beam are thereby caused to pass through the dia: phragm apertures. A cross'-over in the neighbourhood of the cathode is focused on the luminous screen by a main lens system comprising the cylinder 8 and the anode 7, while the cylinders 9 and 8 constitute a condensing lens. The electrodes 9 and 2 may be connected together, the electrons then following the path 10. Alternatively electrode 9 and cathode may be connected, anode 2 being variable or connected to the cylinder 8, the rays 'then following the path 11. Suitable dimensions for the electrodes are specified.
GB19630/37A 1936-07-16 1937-07-15 Improvements in and relating to cathode ray tubes Expired GB503954A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE503954X 1936-07-16

Publications (1)

Publication Number Publication Date
GB503954A true GB503954A (en) 1939-04-17

Family

ID=6546119

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19630/37A Expired GB503954A (en) 1936-07-16 1937-07-15 Improvements in and relating to cathode ray tubes

Country Status (2)

Country Link
FR (1) FR48644E (en)
GB (1) GB503954A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0083459A1 (en) * 1981-12-31 1983-07-13 Koninklijke Philips Electronics N.V. Television camera tube

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0083459A1 (en) * 1981-12-31 1983-07-13 Koninklijke Philips Electronics N.V. Television camera tube
EP0156450A2 (en) * 1981-12-31 1985-10-02 Koninklijke Philips Electronics N.V. Dispenser cathode and method of manufacturing the same
EP0156450A3 (en) * 1981-12-31 1986-01-08 N.V. Philips' Gloeilampenfabrieken Method of manufacturing a dispenser cathode

Also Published As

Publication number Publication date
FR48644E (en) 1938-04-19

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