GB770083A - Microwave attenuators and methods of their manufacture and travelling wave tubes incorporating such attenuators - Google Patents

Microwave attenuators and methods of their manufacture and travelling wave tubes incorporating such attenuators

Info

Publication number
GB770083A
GB770083A GB10641/55A GB1064155A GB770083A GB 770083 A GB770083 A GB 770083A GB 10641/55 A GB10641/55 A GB 10641/55A GB 1064155 A GB1064155 A GB 1064155A GB 770083 A GB770083 A GB 770083A
Authority
GB
United Kingdom
Prior art keywords
rods
attenuators
solution
ceramic
sucrose
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
GB10641/55A
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.)
Sperry Corp
Original Assignee
Sperry 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 Sperry Corp filed Critical Sperry Corp
Publication of GB770083A publication Critical patent/GB770083A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • C04B41/5001—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with carbon or carbonisable materials
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
    • C04B41/81—Coating or impregnation
    • C04B41/85—Coating or impregnation with inorganic materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/16—Circuit elements, having distributed capacitance and inductance, structurally associated with the tube and interacting with the discharge
    • H01J23/24—Slow-wave structures, e.g. delay systems
    • H01J23/30—Damping arrangements associated with slow-wave structures, e.g. for suppression of unwanted oscillations
    • 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
    • Y10T428/2918—Rod, strand, filament or fiber including free carbon or carbide or therewith [not as steel]
    • Y10T428/292—In coating or impregnation

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Ceramic Products (AREA)
  • Microwave Tubes (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
  • Chemically Coating (AREA)

Abstract

770,083. Travelling wave tubes. SPERRY CORPORATION. April 13, 1955 [May 4, 1954], No. 10641/55. Drawings to Specification. Class 39(1). [Also in Group XL(b)] The ceramic rods for supporting the helix in a travelling-wave tube are impregnated centrally with graphite attenuating material in the following manner: The rods are soaked in a solution of an organic non-volatile polyhydroxyl compound, e.g. a 40 per cent. solution of sucrose. The ends of the rods are protected by coatings of paraffin or the solution may be brushed on the central parts only. After drying, the rods are heated for 15 minutes at 400‹C. in an inert atmosphere to decompose the sucrose and leave a precipitate of colloidal carbon in the pores of the ceramic. The heating may be carried out in a confined space with the atmosphere constituted by. the vapours of decomposition. The rods are finally fired for 10 minutes at 1,000‹C. in a vacuum or a dry hydrogen atmosphere to convert the colloidal carbon to graphite. Other sugars such as lactose, glucose or dextrin may be used. The ceramic material may be aluminium or magnesium silicate. Specification 669,475 is referred to.
GB10641/55A 1954-05-04 1955-04-13 Microwave attenuators and methods of their manufacture and travelling wave tubes incorporating such attenuators Expired GB770083A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US427439A US2880120A (en) 1954-05-04 1954-05-04 Method of manufacturing a microwave attenuator for travelling wave tube

Publications (1)

Publication Number Publication Date
GB770083A true GB770083A (en) 1957-03-13

Family

ID=23694876

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10641/55A Expired GB770083A (en) 1954-05-04 1955-04-13 Microwave attenuators and methods of their manufacture and travelling wave tubes incorporating such attenuators

Country Status (5)

Country Link
US (1) US2880120A (en)
DE (1) DE1013732B (en)
FR (1) FR1131125A (en)
GB (1) GB770083A (en)
NL (2) NL93132C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1084781B (en) * 1957-01-07 1960-07-07 Gen Electric Damping members for traveling tubes

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3043040A (en) * 1957-09-06 1962-07-10 Silva Tony Christiano Method of transforming new bricks into bricks which simulate aged bricks
US3026214A (en) * 1957-12-13 1962-03-20 Gen Electric Co Ltd Process for production of low permeability carbon and resultant article
US3039897A (en) * 1958-04-09 1962-06-19 Robert W Waring Semiconductor and method of making the same
US3475707A (en) * 1966-12-21 1969-10-28 Varian Associates Porous intermediate layer for affixing lossy coatings to r.f. tube circuits
US3922383A (en) * 1974-02-28 1975-11-25 Universal Oil Prod Co Polymeric laminates
US5882726A (en) * 1996-01-02 1999-03-16 Msnw, Inc. Low-temperature densification of carbon fiber preforms by impregnation and pyrolysis of sugars
CN113620696B (en) * 2021-08-05 2022-10-14 中国科学院福建物质结构研究所 Low-dielectric high-loss silicon oxide attenuation ceramic composition, silicon oxide attenuation ceramic and preparation method and application thereof

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1091616A (en) * 1911-03-13 1914-03-31 Gen Electric Graphite conductor.
US1745939A (en) * 1926-07-19 1930-02-04 Rca Corp Unalterable ohmic resistance
US2057431A (en) * 1933-03-29 1936-10-13 Raymond H Hobrock Method of making resistance elements
US2341219A (en) * 1940-12-06 1944-02-08 Owens Corning Fiberglass Corp Carbonaceous coating for glass fibers
BE476787A (en) * 1946-10-22
US2487581A (en) * 1948-03-31 1949-11-08 Theodore R Palumbo Electrical resistor and method of making same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1084781B (en) * 1957-01-07 1960-07-07 Gen Electric Damping members for traveling tubes

Also Published As

Publication number Publication date
DE1013732B (en) 1957-08-14
FR1131125A (en) 1957-02-18
US2880120A (en) 1959-03-31
NL93132C (en)
NL196805A (en)

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