GB713140A - Improvements in or relating to the manufacture of dispenser cathodes - Google Patents

Improvements in or relating to the manufacture of dispenser cathodes

Info

Publication number
GB713140A
GB713140A GB18101/52A GB1810152A GB713140A GB 713140 A GB713140 A GB 713140A GB 18101/52 A GB18101/52 A GB 18101/52A GB 1810152 A GB1810152 A GB 1810152A GB 713140 A GB713140 A GB 713140A
Authority
GB
United Kingdom
Prior art keywords
cathode
tube
sintered
july
sintering
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
GB18101/52A
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 Electrical Industries Ltd
Original Assignee
Philips Electrical 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 Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB713140A publication Critical patent/GB713140A/en
Expired legal-status Critical Current

Links

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
    • 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
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12014—All metal or with adjacent metals having metal particles
    • Y10T428/12028—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, etc.]
    • 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
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12014—All metal or with adjacent metals having metal particles
    • Y10T428/12028—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, etc.]
    • Y10T428/12146—Nonmetal particles in a component

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Solid Thermionic Cathode (AREA)
  • Powder Metallurgy (AREA)

Abstract

713,140. Thermionic cathode constructions. PHILIPS ELECTRICAL INDUSTRIES, Ltd. July 17, 1952 [July 20, 1951], No. 18101/52. Class 39(1) [Also in Group XXII] A method of manufacturing dispenser cathodes consists in moulding and presintering a porous body of refractory metal to form the wall 4 of the cathode, sleeving the body over a part of the cathode which has a higher coefficient of thermal expansion, to form the cavity and heating the cathode above its operating temperature and at least 200‹C higher than the pre-sintering temperature. In a cathode for magnetrons, a molybdenum body 1 contains barium-strontium carbonates 3, (which decompose to oxides during heating), in a chamber sealed by the porous tungsten tube 4. The tube is moulded from powder of sizes 1.5Á to 6.1Á and above at 2,000 kg/sq. cm. The tube is then pre-sintered at 900-1000‹C and sintered at 1300-1800‹C. A modified tungsten tube 8, Fig. 2, may be used. The sintering may take place in a helium, argon or nitrogen-hydrogen atmosphere. The pre-sintered tube may be machined to size before being slipped over the structure. Specification 705,537 is referred to.
GB18101/52A 1951-07-20 1952-07-17 Improvements in or relating to the manufacture of dispenser cathodes Expired GB713140A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US237695A US2663069A (en) 1951-07-20 1951-07-20 Method of making incandescent cathodes

Publications (1)

Publication Number Publication Date
GB713140A true GB713140A (en) 1954-08-04

Family

ID=22894767

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18101/52A Expired GB713140A (en) 1951-07-20 1952-07-17 Improvements in or relating to the manufacture of dispenser cathodes

Country Status (8)

Country Link
US (1) US2663069A (en)
BE (1) BE512939A (en)
CH (1) CH310624A (en)
DE (1) DE927520C (en)
ES (1) ES204578A1 (en)
FR (1) FR1060401A (en)
GB (1) GB713140A (en)
NL (1) NL80924C (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2988666A (en) * 1953-12-22 1961-06-13 Philips Corp Cylindrical dispenser cathode for magnetrons
US3018404A (en) * 1958-03-27 1962-01-23 Raytheon Co Electron tube cathodes
US3076915A (en) * 1954-12-24 1963-02-05 Egyesuelt Izzolampa Cathode assembly and method of making same

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE967137C (en) * 1953-02-05 1957-10-10 Csf Process for the production of a cathode for electrical discharge vessels, in which wires extending perpendicular to the emitting surface close off a supply of emission substances
NL96853C (en) * 1953-09-24
NL100356C (en) * 1955-05-10
NL274464A (en) * 1961-02-07
BE632570A (en) * 1962-05-21
US3170081A (en) * 1962-06-05 1965-02-16 Westinghouse Electric Corp Discharge lamp electrode
US3848153A (en) * 1972-05-25 1974-11-12 Energy Sciences Inc Elongated electron-emission cathode assembly and method
US5422536A (en) * 1993-01-08 1995-06-06 Uti Corporation Thermionic cathode with continuous bimetallic wall having varying wall thickness and internal blackening
US5729084A (en) * 1993-01-08 1998-03-17 Uti Corporation Thermionic cathode with continuous bimetallic wall

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1766865A (en) * 1923-04-06 1930-06-24 Gen Motors Res Corp Alloy structure

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2988666A (en) * 1953-12-22 1961-06-13 Philips Corp Cylindrical dispenser cathode for magnetrons
US3076915A (en) * 1954-12-24 1963-02-05 Egyesuelt Izzolampa Cathode assembly and method of making same
US3018404A (en) * 1958-03-27 1962-01-23 Raytheon Co Electron tube cathodes

Also Published As

Publication number Publication date
ES204578A1 (en) 1953-01-01
CH310624A (en) 1955-10-31
DE927520C (en) 1955-05-09
US2663069A (en) 1953-12-22
BE512939A (en)
FR1060401A (en) 1954-04-01
NL80924C (en)

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