FR982803A - Discharge tube comprising two control grids separated by a screen grid - Google Patents

Discharge tube comprising two control grids separated by a screen grid

Info

Publication number: FR982803A
Authority: FR; France
Prior art keywords: discharge tube; screen grid; control grids; grids separated; separated
Prior art date: 1948-03-12
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.)

1948-03-12

Filing date

1949-03-10

Publication date

1951-06-15

1949-03-10 Application filed by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV

1951-06-15 Application granted granted Critical

1951-06-15 Publication of FR982803A publication Critical patent/FR982803A/en

Status Expired legal-status Critical Current

Classifications

- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J21/00—Vacuum tubes
- H01J21/02—Tubes with a single discharge path

FR982803D 1948-03-12 1949-03-10 Discharge tube comprising two control grids separated by a screen grid Expired FR982803A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
NL77933X		1948-03-12

Publications (1)

Publication Number	Publication Date
FR982803A true FR982803A (en)	1951-06-15

Family

ID=19758049

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
FR982803D Expired FR982803A (en)	1948-03-12	1949-03-10	Discharge tube comprising two control grids separated by a screen grid

Country Status (5)

Country	Link
CH (1)	CH272936A (en)
DE (1)	DE811006C (en)
DK (1)	DK77933C (en)
FR (1)	FR982803A (en)
GB (1)	GB662550A (en)

1949
- 1949-03-06 DE DE1949P0035879 patent/DE811006C/en not_active Expired
- 1949-03-09 DK DK84049A patent/DK77933C/en active
- 1949-03-09 GB GB6434/49A patent/GB662550A/en not_active Expired
- 1949-03-10 FR FR982803D patent/FR982803A/en not_active Expired
- 1949-03-10 CH CH272936D patent/CH272936A/en unknown

Also Published As

Publication number	Publication date
DK77933C (en)	1954-08-09
DE811006C (en)	1951-08-16
GB662550A (en)	1951-12-05
CH272936A (en)	1951-01-15

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