FR754900A - Improvements to electric light tubes - Google Patents

Improvements to electric light tubes

Info

Publication number
FR754900A
FR754900A FR754900DA FR754900A FR 754900 A FR754900 A FR 754900A FR 754900D A FR754900D A FR 754900DA FR 754900 A FR754900 A FR 754900A
Authority
FR
France
Prior art keywords
electric light
light tubes
tubes
electric
light
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)
Inventor
Ivar Rennerfelt
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 filed Critical
Application granted granted Critical
Publication of FR754900A publication Critical patent/FR754900A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/04—Signs, boards or panels, illuminated from behind the insignia
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J17/00—Gas-filled discharge tubes with solid cathode
    • H01J17/38—Cold-cathode tubes
    • H01J17/40—Cold-cathode tubes with one cathode and one anode, e.g. glow tubes, tuning-indicator glow tubes, voltage-stabiliser tubes, voltage-indicator tubes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00—Discharge tubes and lamps
    • H01J2893/0064—Tubes with cold main electrodes (including cold cathodes)
    • H01J2893/0065—Electrode systems
    • H01J2893/0067—Electrode assembly without control electrodes, e.g. including a screen

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
FR754900D 1933-04-06 1933-04-06 Improvements to electric light tubes Expired FR754900A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR754900T 1933-04-06

Publications (1)

Publication Number Publication Date
FR754900A true FR754900A (en) 1933-11-16

Family

ID=9164729

Family Applications (1)

Application Number Title Priority Date Filing Date
FR754900D Expired FR754900A (en) 1933-04-06 1933-04-06 Improvements to electric light tubes

Country Status (1)

Country Link
FR (1) FR754900A (en)

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