GB404646A - Improvements in or relating to thermionic devices - Google Patents

Improvements in or relating to thermionic devices

Info

Publication number
GB404646A
GB404646A GB1656532A GB1656532A GB404646A GB 404646 A GB404646 A GB 404646A GB 1656532 A GB1656532 A GB 1656532A GB 1656532 A GB1656532 A GB 1656532A GB 404646 A GB404646 A GB 404646A
Authority
GB
United Kingdom
Prior art keywords
cathode
heater
screen
gauze
relating
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
GB1656532A
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 GB1656532A priority Critical patent/GB404646A/en
Publication of GB404646A publication Critical patent/GB404646A/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

Abstract

404,646. Thermionic valves. FREEDMAN, P., 6, Hillside Gardens, Highgate, London. June 11, 1932, No. 16565. [Class 39 (i).] In an indirectly heated cathode in which the heater is not completely enclosed in an insulating envelope, and in which the spacing between the heater and the cathode is such that the capacity effect between these elements is extremely small, a metallic screen is inserted round the heater, and is connected to the cathode, so that it prevents detrimental discharges between the heater and the cathode. The screen may be a helical wire or a gauze or mesh 6, Figs. 2 and 3. The cathode 3 may have inturned ends as in Fig. 2, contacting with the screen, or may have end plates 7, Fig. 3, of metal or of insulating material such as magnesia. In a modification the screen is of metallic sheet inside the cathode 3, and is of open work construction such as gauze around the ends of the heater projecting from the cathode.
GB1656532A 1932-06-11 1932-06-11 Improvements in or relating to thermionic devices Expired GB404646A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1656532A GB404646A (en) 1932-06-11 1932-06-11 Improvements in or relating to thermionic devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1656532A GB404646A (en) 1932-06-11 1932-06-11 Improvements in or relating to thermionic devices

Publications (1)

Publication Number Publication Date
GB404646A true GB404646A (en) 1934-01-11

Family

ID=10079603

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1656532A Expired GB404646A (en) 1932-06-11 1932-06-11 Improvements in or relating to thermionic devices

Country Status (1)

Country Link
GB (1) GB404646A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2424293A (en) * 1944-03-09 1947-07-22 Westinghouse Electric Corp Thermionic cathode construction

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2424293A (en) * 1944-03-09 1947-07-22 Westinghouse Electric Corp Thermionic cathode construction

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