FR718847A - Improvements to vacuum tubes - Google Patents

Improvements to vacuum tubes

Info

Publication number
FR718847A
FR718847A FR718847DA FR718847A FR 718847 A FR718847 A FR 718847A FR 718847D A FR718847D A FR 718847DA FR 718847 A FR718847 A FR 718847A
Authority
FR
France
Prior art keywords
vacuum tubes
tubes
vacuum
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
Other languages
French (fr)
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Application granted granted Critical
Publication of FR718847A publication Critical patent/FR718847A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
    • H01J5/32—Seals for leading-in conductors
FR718847D 1930-07-19 1931-06-18 Improvements to vacuum tubes Expired FR718847A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL364318X 1930-07-19

Publications (1)

Publication Number Publication Date
FR718847A true FR718847A (en) 1932-01-29

Family

ID=19785458

Family Applications (1)

Application Number Title Priority Date Filing Date
FR718847D Expired FR718847A (en) 1930-07-19 1931-06-18 Improvements to vacuum tubes

Country Status (3)

Country Link
FR (1) FR718847A (en)
GB (1) GB364318A (en)
NL (1) NL33718C (en)

Also Published As

Publication number Publication date
NL33718C (en)
GB364318A (en) 1932-01-07

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