GB297886A - Improvements in or relating to thermionic valves - Google Patents

Improvements in or relating to thermionic valves

Info

Publication number
GB297886A
GB297886A GB846728A GB846728A GB297886A GB 297886 A GB297886 A GB 297886A GB 846728 A GB846728 A GB 846728A GB 846728 A GB846728 A GB 846728A GB 297886 A GB297886 A GB 297886A
Authority
GB
United Kingdom
Prior art keywords
anode
cathode
envelope
grid
leads
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
GB846728A
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 GB846728A priority Critical patent/GB297886A/en
Publication of GB297886A publication Critical patent/GB297886A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
    • H01J1/02—Main electrodes
    • H01J1/13—Solid thermionic cathodes
    • H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment

Landscapes

  • Discharge Lamps And Accessories Thereof (AREA)

Abstract

297,886. Bullimore, W. R. March 30, 1927. Divided application. Vacuum tubes.-A valve has an indirectly-heated equipotential cathode in which one or more electronemitting surfaces 6 are formed on the inside of a cylinder 5 of silica or similar insulating material disposed within a vitreous envelope and around a central anode. A heating coil 7 is mounted around the cylinder, and its leads are taken through the upper end of 'the envelope. The anode consists of a metal tube 2 mounted around a glass tube 3 through which a cooling fluid such as water is circulated; or cooling fins may be provided on an extension of the anode outside the envelope. The leads for the anode, cathode, and grid 4, are taken through the lower end of the envelope. The cathode may be arranged so as to prevent the formation of induced; currents in the electron-emitting surface. Several sets of electrodes with a single heater may be mounted in an envelope. According to, the Provisional Specification the cathode and grid may be arranged inside the anode, and the cathode may have flat sides with rounded ends, the anode being in the form of a plate.
GB846728A 1927-03-30 1927-03-30 Improvements in or relating to thermionic valves Expired GB297886A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB846728A GB297886A (en) 1927-03-30 1927-03-30 Improvements in or relating to thermionic valves

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB846728A GB297886A (en) 1927-03-30 1927-03-30 Improvements in or relating to thermionic valves

Publications (1)

Publication Number Publication Date
GB297886A true GB297886A (en) 1928-10-01

Family

ID=9853013

Family Applications (1)

Application Number Title Priority Date Filing Date
GB846728A Expired GB297886A (en) 1927-03-30 1927-03-30 Improvements in or relating to thermionic valves

Country Status (1)

Country Link
GB (1) GB297886A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2445754A (en) * 1943-06-19 1948-07-27 Melvin D Baller Vacuum tube

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2445754A (en) * 1943-06-19 1948-07-27 Melvin D Baller Vacuum tube

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