CH270976A - Electric discharge tube with an indirectly heatable cathode. - Google Patents

Electric discharge tube with an indirectly heatable cathode.

Info

Publication number: CH270976A
Authority: CH; Switzerland
Prior art keywords: discharge tube; electric discharge; indirectly heatable; heatable cathode; cathode
Prior art date: 1948-03-15

Application number

Other languages

German (de)

Inventor

Gloeilampenfabrieken N Philips

Original Assignee

Philips 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

1950-09-30

1949-03-14 Application filed by Philips Nv filed Critical Philips Nv

1950-09-30 Publication of CH270976A publication Critical patent/CH270976A/en

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

CH270976D 1948-03-15 1949-03-14 Electric discharge tube with an indirectly heatable cathode. CH270976A (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number	Publication Date
CH270976A true CH270976A (en)	1950-09-30

Family

ID=19781927

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CH270976D CH270976A (en)	1948-03-15	1949-03-14	Electric discharge tube with an indirectly heatable 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
FR983147A (en)	1951-06-19
GB676009A (en)	1952-07-23
BE487889A (en)
NL68498C (en)
US2593856A (en)	1952-04-22

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