BE421705A - - Google Patents

Info

Publication number: BE421705A
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.)

1933-04-29

Publication of BE421705A publication Critical patent/BE421705A/xx

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 (da)

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 (da)

Family

ID=24682569

Family Applications (1)

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

Country Status (5)

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

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
DE19946315C2 (de) *	1999-09-28	2001-11-15	Pharmaserv Marburg Gmbh & Co K	Leitfähigkeitssensor

0
- NL NL38561D patent/NL38561C/xx active
- BE BE421705D patent/BE421705A/xx unknown
1933
- 1933-04-29 US US668506A patent/US2084772A/en not_active Expired - Lifetime
1934
- 1934-03-26 GB GB9477/34A patent/GB421705A/en not_active Expired
- 1934-04-13 FR FR771823D patent/FR771823A/fr not_active Expired

Also Published As

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

Publication	Publication Date	Title
FR742089A (da)	1933-02-24
FR741073A (da)	1933-02-04
FR741915A (da)	1933-02-23
FR743417A (da)	1933-03-29
FR743124A (da)	1933-03-23
FR742970A (da)	1933-03-21
FR742536A (da)	1933-03-08
FR739318A (da)	1933-01-06
FR741752A (da)	1933-02-18
FR741831A (da)	1933-02-21
FR741964A (da)	1933-02-23
BE395388A (da)
BE395149A (da)
NL38561C (da)
BE375476A (da)
BE394832A (da)	1933-04-29
BE402677A (da)
BE395712A (da)
BE395669A (da)
BE395662A (da)
BE395502A (da)
BE395493A (da)
BE395431A (da)
BE395422A (da)
BE395039A (da)