BE421705A - - Google Patents

Info

Publication number
BE421705A
BE421705A BE421705DA BE421705A BE 421705 A BE421705 A BE 421705A BE 421705D A BE421705D A BE 421705DA BE 421705 A BE421705 A BE 421705A
Authority
BE
Belgium
Application number
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.)
Publication of BE421705A publication Critical patent/BE421705A/xx

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
BE421705D 1933-04-29 BE421705A (en)

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
BE421705A true BE421705A (en)

Family

ID=24682569

Family Applications (1)

Application Number Title Priority Date Filing Date
BE421705D BE421705A (en) 1933-04-29

Country Status (5)

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

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
DE69109139D1 (en) * 1990-02-02 1995-06-01 Philips Electronics Nv Electrodeless low pressure discharge lamp.
DE29924000U1 (en) * 1999-09-28 2002-01-03 Pharmaserv Marburg Gmbh & Co K conductivity sensor

Also Published As

Publication number Publication date
US2084772A (en) 1937-06-22
GB421705A (en) 1934-12-28
NL38561C (en)
FR771823A (en) 1934-10-18

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