GB424593A - Improvements in supporting members for thermionic filament cathodes - Google Patents

Improvements in supporting members for thermionic filament cathodes

Info

Publication number
GB424593A
GB424593A GB2549833A GB2549833A GB424593A GB 424593 A GB424593 A GB 424593A GB 2549833 A GB2549833 A GB 2549833A GB 2549833 A GB2549833 A GB 2549833A GB 424593 A GB424593 A GB 424593A
Authority
GB
United Kingdom
Prior art keywords
main body
stem portion
filament
auxiliary
block
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
GB2549833A
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.)
Associated Electrical Industries Ltd
Original Assignee
Associated Electrical Industries Ltd
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 Associated Electrical Industries Ltd filed Critical Associated Electrical Industries Ltd
Priority to GB2549833A priority Critical patent/GB424593A/en
Priority to FR778480D priority patent/FR778480A/en
Publication of GB424593A publication Critical patent/GB424593A/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
    • H01J1/15—Cathodes heated directly by an electric current
    • H01J1/18—Supports; Vibration-damping arrangements

Landscapes

  • Solid Thermionic Cathode (AREA)
  • Electron Sources, Ion Sources (AREA)

Abstract

424,593. Thermionic cathodes. SYKES, C., 2, Dartmouth Road, Chorlton, Lancashire, LUDLOW, J. H., 8, Brogden Grove, Brooklands, Cheshire, and ASSOCIATED ELECTRICAL INDUSTRIES, Ltd., Crown House, Aldwych, London. Sept. 14, 1933, No. 25498. [Class 39 (i)] A supporting member for a thermionic filament cathode comprises a main body recessed for the reception of an auxiliary body insulated from the main body and having an extension projecting within a hollow stem portion of the main body. the ends of the filament being secured to and supported by the main and auxiliary bodies. In the example shown in Fig. 6, the main body 1 has a stem portion 3 and a lateral extending portion 6 recessed from the axis of the stem portion to receive a similar portion 8 of the auxiliary body 2 which has an extension 5 passing through the hollow stem portion of the main body. The portions 6 and 8 are spaced apart by a metal block 14 and mica insulation 15 and are secured by screws 9 passing through insulating bushings. The block 14 may be replaced by a block of insulating material. Sockets 10 for the filament ends and a support 13 for the bight of the filament are provided. In a modification shown in Fig. 9, the main body 1a has a slot along the axis of the stem portion in which the auxiliary body 2a is disposed. Two filaments, shown in full and dotted lines may be connected in parallel. A cylindrical sheet metal or mesh screen may surround the supporting member to protect it from electrical discharges and an insulating cap may be provided on the upper end of the assembly.
GB2549833A 1933-09-14 1933-09-14 Improvements in supporting members for thermionic filament cathodes Expired GB424593A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB2549833A GB424593A (en) 1933-09-14 1933-09-14 Improvements in supporting members for thermionic filament cathodes
FR778480D FR778480A (en) 1933-09-14 1934-09-14 Improvements to thermionic cathode supports

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2549833A GB424593A (en) 1933-09-14 1933-09-14 Improvements in supporting members for thermionic filament cathodes

Publications (1)

Publication Number Publication Date
GB424593A true GB424593A (en) 1935-02-25

Family

ID=10228658

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2549833A Expired GB424593A (en) 1933-09-14 1933-09-14 Improvements in supporting members for thermionic filament cathodes

Country Status (2)

Country Link
FR (1) FR778480A (en)
GB (1) GB424593A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7693265B2 (en) 2006-05-11 2010-04-06 Koninklijke Philips Electronics N.V. Emitter design including emergency operation mode in case of emitter-damage for medical X-ray application

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7693265B2 (en) 2006-05-11 2010-04-06 Koninklijke Philips Electronics N.V. Emitter design including emergency operation mode in case of emitter-damage for medical X-ray application

Also Published As

Publication number Publication date
FR778480A (en) 1935-03-16

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