CH278121A - Cathode containing thorium oxide. - Google Patents

Cathode containing thorium oxide.

Info

Publication number: CH278121A
Authority: CH; Switzerland
Prior art keywords: thorium oxide; cathode containing; containing thorium; cathode; oxide
Prior art date: 1948-09-14

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.)

1948-09-14

Filing date

1949-09-12

Publication date

1951-09-30

1949-09-12 Application filed by Philips Nv filed Critical Philips Nv

1951-09-30 Publication of CH278121A publication Critical patent/CH278121A/en

Classifications

- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/02—Manufacture of electrodes or electrode systems
- H01J9/04—Manufacture of electrodes or electrode systems of thermionic cathodes
- H01J9/042—Manufacture, activation of the emissive part
- 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
- H01J1/14—Solid thermionic cathodes characterised by the material
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/04—Electrodes; Screens; Shields
- H01J61/06—Main electrodes
- H01J61/073—Main electrodes for high-pressure discharge lamps
- H01J61/0735—Main electrodes for high-pressure discharge lamps characterised by the material of the electrode
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2913—Rod, strand, filament or fiber
- Y10T428/2933—Coated or with bond, impregnation or core
- Y10T428/294—Coated or with bond, impregnation or core including metal or compound thereof [excluding glass, ceramic and asbestos]
- Y10T428/2958—Metal or metal compound in coating
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2913—Rod, strand, filament or fiber
- Y10T428/298—Physical dimension

Landscapes

Engineering & Computer Science (AREA)
Manufacturing & Machinery (AREA)
Discharge Lamp (AREA)
Solid Thermionic Cathode (AREA)

CH278121D 1948-09-14 1949-09-12 Cathode containing thorium oxide. CH278121A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
NL278121X		1948-09-14

Publications (1)

Publication Number	Publication Date
CH278121A true CH278121A (en)	1951-09-30

Family

ID=19782192

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CH278121D CH278121A (en)	1948-09-14	1949-09-12	Cathode containing thorium oxide.

Country Status (7)

Country	Link
US (1)	US2614942A (en)
BE (1)	BE491070A (en)
CH (1)	CH278121A (en)
DE (1)	DE813573C (en)
FR (1)	FR995225A (en)
GB (1)	GB666053A (en)
NL (1)	NL70864C (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2717975A (en) *	1951-03-30	1955-09-13	Wihtol Weltis	Cathodes for electron tubes
DE1009727B (en) *	1953-01-10	1957-06-06	Deutsche Elektronik Gmbh	Process for producing solid, well-adhering emission layers made of thorium oxide on a carrier metal made of tungsten or molybdenum
US2845515A (en) *	1953-03-12	1958-07-29	Raytheon Mfg Co	Semimetallic resistive filaments
US2881512A (en) *	1954-06-16	1959-04-14	Cie Generale De Telegraphite S	Composition for sintered barium cathodes
US2847328A (en) *	1957-03-04	1958-08-12	James E Cline	Method of making thorium oxide cathodes
DE1080700B (en) *	1958-05-17	1960-04-28	Deutsche Elektronik Gmbh	Process for the production of an indirectly heated cathode, in particular for magnetrons with high oscillating power, and cathode produced according to this process
US3558966A (en) *	1967-03-01	1971-01-26	Semicon Associates Inc	Directly heated dispenser cathode
US3973155A (en) *	1975-01-31	1976-08-03	Westinghouse Electric Corporation	Incandescent source of visible radiations
US4438557A (en) *	1979-05-01	1984-03-27	Woodland International Corporation	Method of using an areal array of tubular electron sources
US4333035A (en) *	1979-05-01	1982-06-01	Woodland International Corporation	Areal array of tubular electron sources
US20090085463A1 (en) *	2007-09-28	2009-04-02	General Electric Company	Thermo-optically functional compositions, systems and methods of making

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2339392A (en) *	1942-10-06	1944-01-18	Rca Corp	Cathode
US2477601A (en) *	1947-06-11	1949-08-02	Raytheon Mfg Co	Directly heated cathode

0
- BE BE491070D patent/BE491070A/xx unknown
- NL NL70864D patent/NL70864C/xx active
1949
- 1949-08-25 US US112246A patent/US2614942A/en not_active Expired - Lifetime
- 1949-09-09 GB GB23374/49A patent/GB666053A/en not_active Expired
- 1949-09-11 DE DEP54597A patent/DE813573C/en not_active Expired
- 1949-09-12 FR FR995225D patent/FR995225A/en not_active Expired
- 1949-09-12 CH CH278121D patent/CH278121A/en unknown

Also Published As

Publication number	Publication date
NL70864C (en)
FR995225A (en)	1951-11-29
GB666053A (en)	1952-02-06
US2614942A (en)	1952-10-21
DE813573C (en)	1951-09-13
BE491070A (en)

Publication	Publication Date	Title
CH278969A (en)	1951-11-15	Stylograph.
CH278121A (en)	1951-09-30	Cathode containing thorium oxide.
FR1017940A (en)	1952-12-22	Thermionic cathode
CH269528A (en)	1950-07-15	Mechanical pencils.
CH260978A (en)	1949-04-15	Cathode ray switch.
DK72645C (en)	1951-06-18	Inseminator.
FR57283E (en)	1952-12-31	Envelope letter
CH284922A (en)	1952-08-15	Cathode.
CH271242A (en)	1950-10-15	Mutator.
DK71119C (en)	1950-06-12	Envelope letter.
AT171551B (en)	1952-06-10	Envelope
DK70066C (en)	1949-10-10	Eraser.
ES18634Y (en)	1949-05-01	New envelope letter.
FR57363E (en)	1953-01-02	Envelope letter
ES17136Y (en)	1949-01-01	Mechanical pencil.
DK73554C (en)	1951-12-27	Cathode whose emission properties are determined by thorium oxide.
CH302941A (en)	1954-11-15	Mechanical pencil.
CH284110A (en)	1952-07-15	Mechanical pencil.
DK77961C (en)	1954-08-16	Electron tube switch.
FI23898A (en)	1949-09-10	Uppvärmningsanordning t.ex. spritkök
ES16947Y (en)	1948-12-16	Improved box-pack.
NL146706B (en)		AMALGAM GUN.
ES17185Y (en)	1949-01-01	Syringe.
ES16500Y (en)	1949-02-01	Briefs-panties.
ES16555Y (en)	1948-12-01	Ebullometer.