GB709274A - Improvements in or relating to cathodes for electric discharge tubes - Google Patents

Improvements in or relating to cathodes for electric discharge tubes

Info

Publication number
GB709274A
GB709274A GB1229/51A GB122951A GB709274A GB 709274 A GB709274 A GB 709274A GB 1229/51 A GB1229/51 A GB 1229/51A GB 122951 A GB122951 A GB 122951A GB 709274 A GB709274 A GB 709274A
Authority
GB
United Kingdom
Prior art keywords
mesh
lead
cathodes
relating
electric discharge
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
GB1229/51A
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.)
WITTELBACHER PLATZ
Siemens and Halske AG
Siemens AG
Original Assignee
WITTELBACHER PLATZ
Siemens and Halske AG
Siemens AG
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 WITTELBACHER PLATZ, Siemens and Halske AG, Siemens AG filed Critical WITTELBACHER PLATZ
Publication of GB709274A publication Critical patent/GB709274A/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
    • H01J1/16—Cathodes heated directly by an electric current characterised by the shape

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

709,274. Thermionic cathode constructions. SIEMENS & HALSKE AKT.-GES. Jan. 16, 1951 [May 16, 1950; Aug. 25, 1950], No. 1229/51. Class 39(1) A cathode comprises a tubular mesh 1, Fig. 1, provided at one end with a tubular extension 3 serving as a lead-in and a mechanical support, and at the other end secured to a disc to which the second lead-in 5 is secured. The mesh may comprise a plurality of right-handed and left-handed spirals or a plurality of elliptical filaments, the wires are preferably welded together at the points of intersection. As shown in Fig. 2 the mesh may be welded at the upper end between tantalum rings 6, 7 connected to a nickel disc 10, and at the lower end between tantalum rings 8, 9 connected to the copper lead-in and support 12. The mesh may be of circular cross-section or of elliptical cross-section.
GB1229/51A 1950-05-16 1951-01-16 Improvements in or relating to cathodes for electric discharge tubes Expired GB709274A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE709274X 1950-05-16

Publications (1)

Publication Number Publication Date
GB709274A true GB709274A (en) 1954-05-19

Family

ID=6617827

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1229/51A Expired GB709274A (en) 1950-05-16 1951-01-16 Improvements in or relating to cathodes for electric discharge tubes

Country Status (1)

Country Link
GB (1) GB709274A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3473073A (en) * 1966-05-18 1969-10-14 Thomson Houston Comp Francaise Electron tube having an improved direct-heated cathode structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3473073A (en) * 1966-05-18 1969-10-14 Thomson Houston Comp Francaise Electron tube having an improved direct-heated cathode structure

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