FR771823A - Lampes à vapeur de sodium - Google Patents

Lampes à vapeur de sodium

Info

Publication number
FR771823A
FR771823A FR771823DA FR771823A FR 771823 A FR771823 A FR 771823A FR 771823D A FR771823D A FR 771823DA FR 771823 A FR771823 A FR 771823A
Authority
FR
France
Prior art keywords
sodium vapor
vapor lamps
lamps
sodium
vapor
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
English (en)
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.)
Westinghouse Lamp Co
Original Assignee
Westinghouse Lamp Co
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 Westinghouse Lamp Co filed Critical Westinghouse Lamp Co
Application granted granted Critical
Publication of FR771823A publication Critical patent/FR771823A/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/70—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr
    • H01J61/74—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr having a main light-emitting filling of difficult vaporisable metal vapour, e.g. sodium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42F—SHEETS TEMPORARILY ATTACHED TOGETHER; FILING APPLIANCES; FILE CARDS; INDEXING
    • B42F13/00—Filing appliances with means for engaging perforations or slots
    • B42F13/16—Filing appliances with means for engaging perforations or slots with claws or rings
    • B42F13/20—Filing appliances with means for engaging perforations or slots with claws or rings pivotable about an axis or axes parallel to binding edges
    • B42F13/28—Filing appliances with means for engaging perforations or slots with claws or rings pivotable about an axis or axes parallel to binding edges in two staggered sections
FR771823D 1933-04-29 1934-04-13 Lampes à vapeur de sodium Expired FR771823A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US668506A US2084772A (en) 1933-04-29 1933-04-29 Sodium vapor lamp

Publications (1)

Publication Number Publication Date
FR771823A true FR771823A (fr) 1934-10-18

Family

ID=24682569

Family Applications (1)

Application Number Title Priority Date Filing Date
FR771823D Expired FR771823A (fr) 1933-04-29 1934-04-13 Lampes à vapeur de sodium

Country Status (5)

Country Link
US (1) US2084772A (enrdf_load_stackoverflow)
BE (1) BE421705A (enrdf_load_stackoverflow)
FR (1) FR771823A (enrdf_load_stackoverflow)
GB (1) GB421705A (enrdf_load_stackoverflow)
NL (1) NL38561C (enrdf_load_stackoverflow)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2687471A (en) * 1948-05-01 1954-08-24 Western Union Telegraph Co Concentrated arc discharge device
US4691169A (en) * 1979-03-15 1987-09-01 Baum Robert A Electrode assembly especially adapted to utilizing a magnetic field for measuring electric conductivity of treated non-polar liquids
EP0440300B1 (en) * 1990-02-02 1995-04-26 Koninklijke Philips Electronics N.V. Electrodeless low-pressure discharge lamp
DE29924000U1 (de) * 1999-09-28 2002-01-03 PharmaServ Marburg GmbH & Co. KG, 35041 Marburg Leitfähigkeitssensor

Also Published As

Publication number Publication date
NL38561C (enrdf_load_stackoverflow)
BE421705A (enrdf_load_stackoverflow)
GB421705A (en) 1934-12-28
US2084772A (en) 1937-06-22

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