FR777069A - Cathode for electric discharge tubes - Google Patents

Cathode for electric discharge tubes

Info

Publication number: FR777069A
Authority: FR; France
Prior art keywords: cathode; electric discharge; discharge tubes; tubes; electric
Prior art date: 1933-09-07
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

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.)

1933-09-07

Filing date

1934-08-09

Publication date

1935-02-11

1934-08-09 Application filed by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV

1935-02-11 Application granted granted Critical

1935-02-11 Publication of FR777069A publication Critical patent/FR777069A/en

Status Expired legal-status Critical Current

Classifications

- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
- H01J1/02—Main electrodes
- H01J1/13—Solid thermionic cathodes
- H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment

FR777069D 1933-09-07 1934-08-09 Cathode for electric discharge tubes Expired FR777069A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
DE419352X		1933-09-07

Publications (1)

Publication Number	Publication Date
FR777069A true FR777069A (en)	1935-02-11

Family

ID=6448971

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
FR777069D Expired FR777069A (en)	1933-09-07	1934-08-09	Cathode for electric discharge tubes

Country Status (3)

Country	Link
BE (1)	BE404932A (en)
FR (1)	FR777069A (en)
GB (1)	GB419352A (en)

0
- BE BE404932D patent/BE404932A/xx unknown
1934
- 1934-08-09 FR FR777069D patent/FR777069A/en not_active Expired
- 1934-08-16 GB GB23667/34A patent/GB419352A/en not_active Expired

Also Published As

Publication number	Publication date
BE404932A (en)
GB419352A (en)	1934-11-09

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