FR840585A - Improvements to incandescent electric lamps and discharge tubes - Google Patents

Improvements to incandescent electric lamps and discharge tubes

Info

Publication number
FR840585A
FR840585A FR840585DA FR840585A FR 840585 A FR840585 A FR 840585A FR 840585D A FR840585D A FR 840585DA FR 840585 A FR840585 A FR 840585A
Authority
FR
France
Prior art keywords
discharge tubes
electric lamps
incandescent electric
incandescent
lamps
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 FR840585A publication Critical patent/FR840585A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/42—Measurement or testing during manufacture

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
FR840585D 1937-07-12 1938-07-12 Improvements to incandescent electric lamps and discharge tubes Expired FR840585A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE217624X 1937-07-12

Publications (1)

Publication Number Publication Date
FR840585A true FR840585A (en) 1939-04-27

Family

ID=5830861

Family Applications (1)

Application Number Title Priority Date Filing Date
FR840585D Expired FR840585A (en) 1937-07-12 1938-07-12 Improvements to incandescent electric lamps and discharge tubes

Country Status (5)

Country Link
BE (1) BE429096A (en)
CH (1) CH217624A (en)
FR (1) FR840585A (en)
GB (1) GB501252A (en)
NL (1) NL54814C (en)

Also Published As

Publication number Publication date
NL54814C (en)
GB501252A (en) 1939-02-23
BE429096A (en)
CH217624A (en) 1941-10-31

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