GB516620A - Improvements in cathode ray tubes - Google Patents

Improvements in cathode ray tubes

Info

Publication number
GB516620A
GB516620A GB16609/38A GB1660938A GB516620A GB 516620 A GB516620 A GB 516620A GB 16609/38 A GB16609/38 A GB 16609/38A GB 1660938 A GB1660938 A GB 1660938A GB 516620 A GB516620 A GB 516620A
Authority
GB
United Kingdom
Prior art keywords
cathode
finely divided
quartz
ray tubes
metallic compound
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
GB16609/38A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB16609/38A priority Critical patent/GB516620A/en
Priority to US276882A priority patent/US2237065A/en
Publication of GB516620A publication Critical patent/GB516620A/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
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
    • H01J29/16—Incandescent screens
    • 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
    • H01J29/481—Electron guns using field-emission, photo-emission, or secondary-emission electron source

Landscapes

  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)

Abstract

516,620. Cathode-ray tubes. BOSCH, F. J. G. VAN DEN. June 2, 1938, No. 16609. [Class 39 (i)] A cathode-ray tube comprises. a screen of the type which is rendered luminous by incandescence and is composed of a layer of high melting point metal or metallic compound in finely divided form carried on quartz glass. In the form shown, the tube has a quartz end 23 secured to the body by a graded seal 26 and coated with a finely divided layer 24 of molybdenum, tungsten or tantalum carbide, which is incorporated in or upon the quartz by fusion. A finely divided fluorescent material, such as zinc sulphide may be mixed with the metal or metallic compound. The tube includes an electron multiplier of the form described in Specification 516,621, viz., a number of perforated secondary-emitting electrodes 17 on to which electrons from the cathode 10 are directed by a reflector 14 through control grids 12, 13. Specification 424,632 also is referred to.
GB16609/38A 1938-06-02 1938-06-02 Improvements in cathode ray tubes Expired GB516620A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB16609/38A GB516620A (en) 1938-06-02 1938-06-02 Improvements in cathode ray tubes
US276882A US2237065A (en) 1938-06-02 1939-06-01 Cathode ray tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB16609/38A GB516620A (en) 1938-06-02 1938-06-02 Improvements in cathode ray tubes

Publications (1)

Publication Number Publication Date
GB516620A true GB516620A (en) 1940-01-08

Family

ID=10080412

Family Applications (1)

Application Number Title Priority Date Filing Date
GB16609/38A Expired GB516620A (en) 1938-06-02 1938-06-02 Improvements in cathode ray tubes

Country Status (2)

Country Link
US (1) US2237065A (en)
GB (1) GB516620A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3019364A (en) * 1955-12-22 1962-01-30 Zeiss Jena Veb Carl Photoelectric device for ultra-violet radiation
US3531674A (en) * 1968-07-05 1970-09-29 Raytheon Co Cathode ray tube with cooling means for the fluorescent screen
FR2034981A1 (en) * 1969-03-17 1970-12-18 Jeol Ltd

Also Published As

Publication number Publication date
US2237065A (en) 1941-04-01

Similar Documents

Publication Publication Date Title
GB463297A (en) Improvements in or relating to cathode ray tube television transmitting apparatus
GB648955A (en) Improvements in electron-emitting electrodes for electric discharge tubes
GB451451A (en) Improvements in or relating to cathode ray tubes and methods of manufacturing the same
GB516620A (en) Improvements in cathode ray tubes
GB472173A (en) Improvements in or relating to a device for obtaining a visual image of an object obscured from the natural vision
US2155465A (en) Fluorescent screen for cathode ray tubes
GB455927A (en) Improvements in or relating to cathode ray tubes
GB413166A (en) Improvements in and relating to controllable gas or vapour filled discharge tubes
GB495165A (en) Improvements relating to the envelopes of and leads in high frequency electron discharge tubes
GB425739A (en) Improvements in or relating to thermionic valve arrangements
GB475772A (en) Improvements in electric discharge tubes
GB426760A (en) Improvements in or relating to thermionic valves and other electron discharge devices
GB730204A (en) Improvements relating to cathode ray tubes
GB365303A (en) Electron tube with incandescent cathode
GB274507A (en) High emission thermionic valve
GB216840A (en)
GB519015A (en) Improvements in and relating to electron tubes
GB1090414A (en) Cathode ray tube
GB506794A (en) Improvements in or relating to electrode constructions for electron discharge tubes
GB479920A (en) Improvements in and relating to electric discharge devices
GB531148A (en) Improvements in and relating to cathode ray tubes
GB522533A (en) Improvements in or relating to cathode ray tubes
GB430809A (en) Improvements in or relating to cathode-ray tubes
GB597741A (en) Improvements relating to x-ray tubes
GB369655A (en) Improvements relating to electron discharge tubes or thermionic valves