FR723981A - Vacuum tube - Google Patents

Vacuum tube

Info

Publication number
FR723981A
FR723981A FR723981DA FR723981A FR 723981 A FR723981 A FR 723981A FR 723981D A FR723981D A FR 723981DA FR 723981 A FR723981 A FR 723981A
Authority
FR
France
Prior art keywords
vacuum tube
vacuum
tube
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 FR723981A publication Critical patent/FR723981A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J17/00—Gas-filled discharge tubes with solid cathode
    • H01J17/02—Details
    • H01J17/34—One or more circuit elements structurally associated with the tube
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • H01J61/35—Vessels; Containers provided with coatings on the walls thereof; Selection of materials for the coatings
FR723981D 1930-10-09 1931-10-09 Vacuum tube Expired FR723981A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1935723X 1930-10-09

Publications (1)

Publication Number Publication Date
FR723981A true FR723981A (en) 1932-04-18

Family

ID=7750209

Family Applications (1)

Application Number Title Priority Date Filing Date
FR723981D Expired FR723981A (en) 1930-10-09 1931-10-09 Vacuum tube

Country Status (2)

Country Link
US (1) US1935723A (en)
FR (1) FR723981A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2430218A (en) * 1944-03-21 1947-11-04 Eitel Mccullough Inc Electron tube with secondary emissive grid
US2675503A (en) * 1953-05-21 1954-04-13 Workman Henry Booster tube
US3784861A (en) * 1971-02-25 1974-01-08 Philips Corp Lamp with opaque screen

Also Published As

Publication number Publication date
US1935723A (en) 1933-11-21

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