FR631583A - Improvements made to the filaments of t lamps. s. f. - Google Patents

Improvements made to the filaments of t lamps. s. f.

Info

Publication number
FR631583A
FR631583A FR631583DA FR631583A FR 631583 A FR631583 A FR 631583A FR 631583D A FR631583D A FR 631583DA FR 631583 A FR631583 A FR 631583A
Authority
FR
France
Prior art keywords
filaments
lamps
improvements made
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.)
KNOLL ET R MARIE R
Original Assignee
KNOLL ET R MARIE R
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 KNOLL ET R MARIE R filed Critical KNOLL ET R MARIE R
Application granted granted Critical
Publication of FR631583A publication Critical patent/FR631583A/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
FR631583D 1926-06-16 1926-06-16 Improvements made to the filaments of t lamps. s. f. Expired FR631583A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR631583T 1926-06-16

Publications (1)

Publication Number Publication Date
FR631583A true FR631583A (en) 1927-12-22

Family

ID=8991863

Family Applications (1)

Application Number Title Priority Date Filing Date
FR631583D Expired FR631583A (en) 1926-06-16 1926-06-16 Improvements made to the filaments of t lamps. s. f.

Country Status (1)

Country Link
FR (1) FR631583A (en)

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