FR983147A - Discharge tube with indirectly heated cathode - Google Patents

Discharge tube with indirectly heated cathode

Info

Publication number: FR983147A
Authority: FR; France
Prior art keywords: discharge tube; indirectly heated; heated cathode; cathode; indirectly
Prior art date: 1948-03-15
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.)

1948-03-15

Filing date

1949-03-14

Publication date

1951-06-19

1949-03-14 Application filed by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV

1951-06-19 Application granted granted Critical

1951-06-19 Publication of FR983147A publication Critical patent/FR983147A/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
- H01J1/22—Heaters

FR983147D 1948-03-15 1949-03-14 Discharge tube with indirectly heated cathode Expired FR983147A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
NL270976X		1948-03-15

Publications (1)

Publication Number	Publication Date
FR983147A true FR983147A (en)	1951-06-19

Family

ID=19781927

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
FR983147D Expired FR983147A (en)	1948-03-15	1949-03-14	Discharge tube with indirectly heated cathode

Country Status (7)

Country	Link
US (1)	US2593856A (en)
BE (1)	BE487889A (en)
CH (1)	CH270976A (en)
DE (1)	DE809324C (en)
FR (1)	FR983147A (en)
GB (1)	GB676009A (en)
NL (1)	NL68498C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3869692A (en) *	1973-05-07	1975-03-04	Gte Sylvania Inc	Heater for vacuum tube cathode in which the wire of the heater legs has been etched to reduce its diameter

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US247097A (en) *		1881-09-13		Joseph v
USRE19870E (en) *	1927-11-16	1936-02-25		Electron discharge device with
US2075876A (en) *	1927-12-28	1937-04-06	Electrons Inc	Cathode organization
US1914883A (en) *	1929-10-22	1933-06-20	Frederick G Cottrell	Method and apparatus for producing ions
US1968280A (en) *	1933-05-01	1934-07-31	Grigsby Grunow Co	Cathode structure
US2399402A (en) *	1941-04-08	1946-04-30	Bendix Aviat Corp	Electrical connecting and radioshielding means
US2403444A (en) *	1941-05-31	1946-07-09	Bell Telephone Labor Inc	Electron discharge device
US2403445A (en) *	1941-05-31	1946-07-09	Bell Telephone Labor Inc	Electron discharge device

0
- NL NL68498D patent/NL68498C/xx active
- BE BE487889D patent/BE487889A/xx unknown
1949
- 1949-02-17 US US76884A patent/US2593856A/en not_active Expired - Lifetime
- 1949-03-06 DE DEP35878D patent/DE809324C/en not_active Expired
- 1949-03-11 GB GB6742/49A patent/GB676009A/en not_active Expired
- 1949-03-14 FR FR983147D patent/FR983147A/en not_active Expired
- 1949-03-14 CH CH270976D patent/CH270976A/en unknown

Also Published As

Publication number	Publication date
DE809324C (en)	1951-07-26
GB676009A (en)	1952-07-23
BE487889A (en)
NL68498C (en)
CH270976A (en)	1950-09-30
US2593856A (en)	1952-04-22

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