NL30977C - - Google Patents

Info

Publication number
NL30977C
NL30977C NL30977DA NL30977C NL 30977 C NL30977 C NL 30977C NL 30977D A NL30977D A NL 30977DA NL 30977 C NL30977 C NL 30977C
Authority
NL
Netherlands
Application number
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.)
Publication of NL30977C publication Critical patent/NL30977C/xx

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00Details 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
    • H01J1/02Main electrodes
    • H01J1/13Solid thermionic cathodes
    • H01J1/20Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
    • H01J1/24Insulating layer or body located between heater and emissive material
NL30977D 1928-05-09 NL30977C (zh)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US276340A US1871343A (en) 1928-05-09 1928-05-09 Heater element for electron emission devices

Publications (1)

Publication Number Publication Date
NL30977C true NL30977C (zh)

Family

ID=23056255

Family Applications (1)

Application Number Title Priority Date Filing Date
NL30977D NL30977C (zh) 1928-05-09

Country Status (3)

Country Link
US (1) US1871343A (zh)
BE (1) BE360639A (zh)
NL (1) NL30977C (zh)

Also Published As

Publication number Publication date
US1871343A (en) 1932-08-09
BE360639A (zh)

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