GB1025168A - Improvements relating to cathode assemblies for electric discharge tubes - Google Patents

Improvements relating to cathode assemblies for electric discharge tubes

Info

Publication number
GB1025168A
GB1025168A GB38008/64A GB3800864A GB1025168A GB 1025168 A GB1025168 A GB 1025168A GB 38008/64 A GB38008/64 A GB 38008/64A GB 3800864 A GB3800864 A GB 3800864A GB 1025168 A GB1025168 A GB 1025168A
Authority
GB
United Kingdom
Prior art keywords
tubes
distance piece
metal
emissive
ceramic
Prior art date
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
GB38008/64A
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries Ltd
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.)
Filing date
Publication date
Application filed by Philips Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1025168A publication Critical patent/GB1025168A/en
Expired legal-status Critical Current

Links

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
    • H01J1/15—Cathodes heated directly by an electric current
    • H01J1/18—Supports; Vibration-damping arrangements

Landscapes

  • Discharge Lamp (AREA)
  • Electrostatic Separation (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Lasers (AREA)
  • Solid Thermionic Cathode (AREA)

Abstract

1,025,168. Thermionic cathodes. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. Sept. 17, 1964 [Sept. 20, 1963], No. 38008/64. Heading H1D. A cathode assembly comprises a plurality of parallel, thin wires wound over two tubular supports 1, 2, which are spaced apart by a distance piece 3 having rod-shaped ends which extend freely through apertures 12 provided in the tubes 1, 2. As shown, the assembly is supported in a discharge tube between a mica plate 13 and a tensioning device 11, the tube 1 being free to move and tilt slightly relative to tube 2, which ensures an even tensioning of emissive wires 5. The tubes 1, 2 may be of nickel, distance piece 3 being of ceramic or comprising two metal rods joined by a central ceramic or glass bead; or a metal distance piece may be used with metal tubes lined with insulating material or with ceramic tubes provided with one or more conductive strips joining groups of emissive wires in parallel, the groups then being joined in series. Also the distance piece may comprise short end rods joined by a metal plate acting as a shield between the two emissive surfaces and coated with gathering material.
GB38008/64A 1963-09-20 1964-09-17 Improvements relating to cathode assemblies for electric discharge tubes Expired GB1025168A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL63298210A NL142273B (en) 1963-09-20 1963-09-20 DIRECTLY HEATED CATHODE FOR AN ELECTRICAL DISCHARGE TUBE, AND ELECTRIC DISCHARGE TUBE FITTED WITH AT LEAST SUCH A CATHOD.

Publications (1)

Publication Number Publication Date
GB1025168A true GB1025168A (en) 1966-04-06

Family

ID=19755072

Family Applications (1)

Application Number Title Priority Date Filing Date
GB38008/64A Expired GB1025168A (en) 1963-09-20 1964-09-17 Improvements relating to cathode assemblies for electric discharge tubes

Country Status (8)

Country Link
US (1) US3327157A (en)
AT (1) AT250517B (en)
BE (1) BE653296A (en)
CH (1) CH425000A (en)
DE (1) DE1234857B (en)
ES (1) ES304155A1 (en)
GB (1) GB1025168A (en)
NL (2) NL142273B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2119564A (en) * 1982-04-21 1983-11-16 Rca Corp Line cathode having localized emissive coating and method of making

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3922578A (en) * 1974-05-01 1975-11-25 Gte Sylvania Inc Large area cathode

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1720442A (en) * 1923-06-19 1929-07-09 Ass Elect Ind Vacuum electric-tube apparatus
DE519082C (en) * 1926-04-21 1931-02-23 Radiotechnique Soc Process for the production of electron tubes
US1980937A (en) * 1933-09-07 1934-11-13 Rca Corp Electron discharge device
US2656477A (en) * 1951-05-25 1953-10-20 Lafayette M Hughes Photoelectric cell having a light sensitive electron emissive cathode
AT230502B (en) * 1960-10-14 1963-12-10 Philips Nv Directly heated cathode for an electrical discharge tube, forming a rigid, handleable unit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2119564A (en) * 1982-04-21 1983-11-16 Rca Corp Line cathode having localized emissive coating and method of making
US4487673A (en) * 1982-04-21 1984-12-11 Rca Corporation Method of making a line cathode having localized emissive coating

Also Published As

Publication number Publication date
US3327157A (en) 1967-06-20
CH425000A (en) 1966-11-30
DE1234857B (en) 1967-02-23
NL298210A (en)
ES304155A1 (en) 1965-03-16
AT250517B (en) 1966-11-10
NL142273B (en) 1974-05-15
BE653296A (en) 1965-03-18

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