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GB1159105A - Improvements in or relating to Thermionic Cathodes for use in Electric Discharge Tubes - Google Patents

Improvements in or relating to Thermionic Cathodes for use in Electric Discharge Tubes

Info

Publication number
GB1159105A
GB1159105A GB50690/66A GB5069066A GB1159105A GB 1159105 A GB1159105 A GB 1159105A GB 50690/66 A GB50690/66 A GB 50690/66A GB 5069066 A GB5069066 A GB 5069066A GB 1159105 A GB1159105 A GB 1159105A
Authority
GB
United Kingdom
Prior art keywords
barrier
cathode
current
electric discharge
nov
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
GB50690/66A
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 GB1159105A publication Critical patent/GB1159105A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J17/00—Gas-filled discharge tubes with solid cathode
    • H01J17/02—Details
    • H01J17/04—Electrodes; Screens
    • H01J17/06—Cathodes

Landscapes

  • Microwave Tubes (AREA)
  • Electron Sources, Ion Sources (AREA)
  • Electrodes For Cathode-Ray Tubes (AREA)

Abstract

1,159,105. Thermionic cathode constructions. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. 11 Nov., 1966 [16 Nov., 1965],No. 50690/66. Heading H1D. A thermionic cathode for use in an electric discharge tube comprises a thin walled barrier member 1 having a high thermal resistance which serves as part of the cathode support structure and as current carrier and a current bridge 10 connected in parallel with the barrier having a cross-section greater than that of the barrier. A cathode comprises a meshed grid of thorium plated tungsten 4 supported by a central current supply rod 6 and a cylindrical thin walled heat barrier 1 bridged by four current carrying strips 10. Another cathode comprises a cylindrical emissive surface heated by two wires wound on a ceramic cylinder in a manner such that their magnetic fields compensate to reduce hum. Alternatively the emissive surface may be mounted on the hood 5 and be heated by a filament below on a flat ceramic plate supported by the rod 6. The bridges may be connected to the heater wires with the upper ends spaced from the heat barrier.
GB50690/66A 1965-11-16 1966-11-11 Improvements in or relating to Thermionic Cathodes for use in Electric Discharge Tubes Expired GB1159105A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP38132A DE1293909B (en) 1965-11-16 1965-11-16 Incandescent cathode for an electrical discharge tube with a heat trap

Publications (1)

Publication Number Publication Date
GB1159105A true GB1159105A (en) 1969-07-23

Family

ID=7375700

Family Applications (1)

Application Number Title Priority Date Filing Date
GB50690/66A Expired GB1159105A (en) 1965-11-16 1966-11-11 Improvements in or relating to Thermionic Cathodes for use in Electric Discharge Tubes

Country Status (8)

Country Link
US (1) US3450927A (en)
AT (1) AT264672B (en)
BE (1) BE689735A (en)
CH (1) CH467519A (en)
DE (1) DE1293909B (en)
FR (1) FR1505633A (en)
GB (1) GB1159105A (en)
NL (1) NL6615845A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2480496A1 (en) * 1980-04-14 1981-10-16 Philips Nv CATHODE FOR ELECTRONIC TUBES COMPRISING TWO HOLLOW BODIES

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3974414A (en) * 1975-07-09 1976-08-10 Gte Sylvania Incorporated Cathode ray tube cathode
JPS5824370Y2 (en) * 1977-02-04 1983-05-25 株式会社日立製作所 magnetron
JPS6036056B2 (en) * 1979-06-21 1985-08-17 株式会社東芝 cathode structure
US4388551A (en) * 1980-11-24 1983-06-14 Zenith Radio Corporation Quick-heating cathode structure

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2806166A (en) * 1952-08-30 1957-09-10 Rca Corp Electron discharge device
US2768321A (en) * 1955-05-02 1956-10-23 Rca Corp Indirectly heated electron emitter for power tubes and the like
US2898501A (en) * 1956-08-13 1959-08-04 Machlett Lab Inc Getters for electron tubes
US3056060A (en) * 1960-03-25 1962-09-25 Machlett Lab Inc Cathodes for electron tubes
US3227906A (en) * 1962-05-02 1966-01-04 Eitel Mccullough Inc Cathode support and heat shielding structure for electron gun
US3225246A (en) * 1963-03-27 1965-12-21 Rca Corp Indirectly heated cathode

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2480496A1 (en) * 1980-04-14 1981-10-16 Philips Nv CATHODE FOR ELECTRONIC TUBES COMPRISING TWO HOLLOW BODIES

Also Published As

Publication number Publication date
US3450927A (en) 1969-06-17
CH467519A (en) 1969-01-15
FR1505633A (en) 1967-12-15
DE1293909B (en) 1969-04-30
BE689735A (en) 1967-05-16
AT264672B (en) 1968-09-10
NL6615845A (en) 1967-05-17

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee