US3598646A - Method for preparing oxide-coated cathodes - Google Patents

Method for preparing oxide-coated cathodes Download PDF

Info

Publication number
US3598646A
US3598646A US732515A US3598646DA US3598646A US 3598646 A US3598646 A US 3598646A US 732515 A US732515 A US 732515A US 3598646D A US3598646D A US 3598646DA US 3598646 A US3598646 A US 3598646A
Authority
US
United States
Prior art keywords
particles
coated
substrate
cathode
coating
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 - Lifetime
Application number
US732515A
Other languages
English (en)
Inventor
John Joseph Moscony
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.)
RCA Licensing Corp
Original Assignee
RCA Corp
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 RCA Corp filed Critical RCA Corp
Application granted granted Critical
Publication of US3598646A publication Critical patent/US3598646A/en
Assigned to RCA LICENSING CORPORATION, TWO INDEPENDENCE WAY, PRINCETON, NJ 08540, A CORP. OF DE reassignment RCA LICENSING CORPORATION, TWO INDEPENDENCE WAY, PRINCETON, NJ 08540, A CORP. OF DE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: RCA CORPORATION, A CORP. OF DE
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D45/00—Clamping or other pressure-applying devices for securing or retaining closure members
    • B65D45/32—Clamping or other pressure-applying devices for securing or retaining closure members for applying radial or radial and axial pressure, e.g. contractible bands encircling closure member
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B31/00—Packaging articles or materials under special atmospheric or gaseous conditions; Adding propellants to aerosol containers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J19/00—Details of vacuum tubes of the types covered by group H01J21/00
    • H01J19/02—Electron-emitting electrodes; Cathodes
    • H01J19/04—Thermionic cathodes
    • H01J19/14—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment

Definitions

  • the particles ordinarily used for preparing the cathode coating are first coated with metallic cobalt. This is preferably achieved by suspending the particles in a solution of dicobalt octacarbonyl, heating the suspension at about 100 to 150 C., and then removing the cobalt-coated particles from the suspension. Then, a layer of the cobalt-coated particles is produced upon a surface of the metal substrate. The substrate and layer thereon are then assembled into an electron tube. During or after evacuation and sealing of the tube, the substrate and the particle layer thereon are heated so as to produce an electron-emissive coating of sintered cobaltcoated oxide particles.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Solid Thermionic Cathode (AREA)
US732515A 1968-05-28 1968-05-28 Method for preparing oxide-coated cathodes Expired - Lifetime US3598646A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US73251568A 1968-05-28 1968-05-28

Publications (1)

Publication Number Publication Date
US3598646A true US3598646A (en) 1971-08-10

Family

ID=24943813

Family Applications (1)

Application Number Title Priority Date Filing Date
US732515A Expired - Lifetime US3598646A (en) 1968-05-28 1968-05-28 Method for preparing oxide-coated cathodes

Country Status (5)

Country Link
US (1) US3598646A (enExample)
DE (1) DE1927033C3 (enExample)
FR (1) FR2009472A1 (enExample)
GB (1) GB1252031A (enExample)
NL (1) NL168006C (enExample)

Also Published As

Publication number Publication date
NL6908031A (enExample) 1969-12-02
NL168006B (nl) 1981-09-16
GB1252031A (enExample) 1971-11-03
DE1927033B2 (de) 1977-10-20
DE1927033A1 (de) 1969-12-04
FR2009472A1 (enExample) 1970-02-06
DE1927033C3 (de) 1978-06-22
NL168006C (nl) 1982-02-16

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Legal Events

Date Code Title Description
AS Assignment

Owner name: RCA LICENSING CORPORATION, TWO INDEPENDENCE WAY, P

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:RCA CORPORATION, A CORP. OF DE;REEL/FRAME:004993/0131

Effective date: 19871208