GB344844A - An improved cathode for high vacuum discharge vessels - Google Patents

An improved cathode for high vacuum discharge vessels

Info

Publication number
GB344844A
GB344844A GB36927/29A GB3692729A GB344844A GB 344844 A GB344844 A GB 344844A GB 36927/29 A GB36927/29 A GB 36927/29A GB 3692729 A GB3692729 A GB 3692729A GB 344844 A GB344844 A GB 344844A
Authority
GB
United Kingdom
Prior art keywords
filament
class
valves
cathode
dec
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
GB36927/29A
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 GB344844A publication Critical patent/GB344844A/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

Landscapes

  • Discharge Lamp (AREA)

Abstract

344,844. Thermionic valves. SIEMENS & HALSKE AKT.-GES., Siemensstadt, Berlin. Dec. 2, 1929, No. 36927. Convention date, Dec. 3, 1928. [Class 39 (i).] Transmitter valves, short-filament amplifier valves having a filament voltage below 0À7 volts, and other high-vacuum tubes are provided with a cathode filament of the molybdenum - thorium alloy described in Specification 234,435, [Class 39 (i), Electric lamps, Arc, &c.], or of other molybdenum alloy with enhanced electron emission, the filament having a diameter of at least 0À3 mm. so that the active film at the surface is continuously regenerated. No getter to absorb liberated gases is required, such gases not affecting the efficiency of the cathode and being finally occluded by the electrodes &c. Specification 255,098, [Class 39 (i), Electric lamps, Arc, &c.], also is referred to.
GB36927/29A 1928-12-03 1929-12-02 An improved cathode for high vacuum discharge vessels Expired GB344844A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE344844X 1928-12-03

Publications (1)

Publication Number Publication Date
GB344844A true GB344844A (en) 1931-03-02

Family

ID=6254230

Family Applications (1)

Application Number Title Priority Date Filing Date
GB36927/29A Expired GB344844A (en) 1928-12-03 1929-12-02 An improved cathode for high vacuum discharge vessels

Country Status (3)

Country Link
FR (1) FR685902A (en)
GB (1) GB344844A (en)
NL (1) NL28296C (en)

Also Published As

Publication number Publication date
NL28296C (en) 1932-11-15
FR685902A (en) 1930-07-18

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