GB874631A - Improvements relating to cathodes for electronic valves - Google Patents

Improvements relating to cathodes for electronic valves

Info

Publication number
GB874631A
GB874631A GB22635/59A GB2263559A GB874631A GB 874631 A GB874631 A GB 874631A GB 22635/59 A GB22635/59 A GB 22635/59A GB 2263559 A GB2263559 A GB 2263559A GB 874631 A GB874631 A GB 874631A
Authority
GB
United Kingdom
Prior art keywords
cathode
wires
supported
tungsten
july
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
GB22635/59A
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.)
Siemens and Halske AG
Siemens AG
Original Assignee
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 Siemens and Halske AG, Siemens AG filed Critical Siemens and Halske AG
Publication of GB874631A publication Critical patent/GB874631A/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

  • Solid Thermionic Cathode (AREA)

Abstract

874,631. Tliennionic valves. SIEMENS & HALSKE A.G. July 1, 1959 [July 1, 1958] No. 22635/59. Class 39(1). A tubular mesh cathode, formed by heating wires 3 and supported at its ends by metal rings or discs 6, 7 to which current supply leads 4, 5 are connected, is also supported between its ends by one or more members 9 spaced from the end supports 6, 7 and attached to but insulated from one of the supply leads, so as to prevent deformation of the cathode wires through their own weight with the high temperatures necessary for processing of the, cathode. The support member 9 may comprise a narrow annular sheet of tungsten or tantalum secured at its inner edge to an insulating member 8 mounted on metal disc 5a on supply lead 5 and welded at its outer edge to the cathode which may comprise tungsten wires of .2 to .4 mm. diameter wound in opposite spirals. Alternatively, the cathode may be supported by hairpin-shaped tungsten wires which embrace crossing points of the cathode wires and which are secured at their ends to an insulating disc mounted on member 8. If desired the cathode may be supported by two or more members 9 located at intervals along its length.
GB22635/59A 1958-07-01 1959-07-01 Improvements relating to cathodes for electronic valves Expired GB874631A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE874631X 1958-07-01

Publications (1)

Publication Number Publication Date
GB874631A true GB874631A (en) 1961-08-10

Family

ID=6816947

Family Applications (1)

Application Number Title Priority Date Filing Date
GB22635/59A Expired GB874631A (en) 1958-07-01 1959-07-01 Improvements relating to cathodes for electronic valves

Country Status (2)

Country Link
FR (1) FR1229220A (en)
GB (1) GB874631A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1455956A (en) * 1965-07-20 1966-05-20 Thomson Houston Comp Francaise Direct heating cathode improvements

Also Published As

Publication number Publication date
FR1229220A (en) 1960-09-05

Similar Documents

Publication Publication Date Title
GB1015270A (en) Electrical heating element
GB874631A (en) Improvements relating to cathodes for electronic valves
GB924223A (en) Getter for electron tubes
US2717975A (en) Cathodes for electron tubes
GB1418039A (en) X-ray tubes
GB1159105A (en) Improvements in or relating to Thermionic Cathodes for use in Electric Discharge Tubes
US2309642A (en) Electrode support lead
GB864318A (en) Improvements in or relating to electric heating elements
SE301396B (en)
GB766881A (en) Improvements relating to cathodes for high power valves
GB861257A (en) Improvements in or relating to radiation screens for electric furnaces
AT222463B (en) Electrode wire feeder for metal arc welding
GB1034442A (en) Improvements relating to electrodes for electrically heated glass furnaces
ES307847A1 (en) An electrically-heated evaporation source
GB326146A (en) Improvements in and relating to thermionic valves
GB920796A (en) The production of decafluorocyclohexene
GB1151880A (en) Ionisation Vacuum Gauge.
GB830352A (en) Improvements in or relating to the mounting of thermionic cathodes
GB857618A (en) A self-supporting directly heated cathode
GB960599A (en) An improved arrangement for supporting an elongated cylindrical object
JPS53970A (en) Electrode structure for electron tube and its manufacture
GB921227A (en) The high temperature furnace for x-ray diffractometer
GB1216583A (en) Resilient support means for directly heated cathode
GB874757A (en) Improvements in electric heaters
GB810399A (en) Improvements in electron tubes