GB1237948A - - Google Patents

Info

Publication number
GB1237948A
GB1237948A GB1237948DA GB1237948A GB 1237948 A GB1237948 A GB 1237948A GB 1237948D A GB1237948D A GB 1237948DA GB 1237948 A GB1237948 A GB 1237948A
Authority
GB
United Kingdom
Prior art keywords
plates
stack
tube
travelling
dec
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
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
Priority claimed from DE19671614680 external-priority patent/DE1614680C3/en
Application filed filed Critical
Publication of GB1237948A publication Critical patent/GB1237948A/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
    • C04B41/52—Multiple coating or impregnating multiple coating or impregnating with the same composition or with compositions only differing in the concentration of the constituents, is classified as single coating or impregnation
    • 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
    • C04B41/89—Coating or impregnation for obtaining at least two superposed coatings having different compositions
    • 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
    • H01J19/28—Non-electron-emitting electrodes; Screens
    • H01J19/30—Non-electron-emitting electrodes; Screens characterised by the material
    • 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
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/90—Electrical properties
    • C04B2111/94—Electrically conducting materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00—Discharge tubes and lamps
    • H01J2893/0001—Electrodes and electrode systems suitable for discharge tubes or lamps
    • H01J2893/0012—Constructional arrangements
    • H01J2893/0019—Chemical composition and manufacture
    • H01J2893/002—Chemical composition and manufacture chemical
    • H01J2893/0021—Chemical composition and manufacture chemical carbon

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Discharge Heating (AREA)
  • Microwave Tubes (AREA)

Abstract

1,237,948. Travelling-wave tubes. SIEMENS A.G. 12 Dec., 1968 [13 Dec., 1967], No. 59043/68. Heading H1D. A component of a discharge tube-e.g. an envelope portion, waveguide, delay line, or the collector, of a travelling-wave tube-is formed by a stack of plates of pyrolitic carbon united, by electron beam welding, for example, by interposed rings or foils of molybdenum or tantalum, whereby the high thermal conductivity in their plane of the thermally anisotropic plates enhances the dissipation of heat generated in the stack during operation of the tube. The plates may be apertured, and the plates, and the apertures therein, may be of different sizes, to provide a desired inner or outer profile for the component. To enhance the electrical conductance of the stack, the surfaces of the plates may be coated with rhenium and a superposed layer of copper or silver.
GB1237948D 1967-12-13 1968-12-12 Expired GB1237948A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19671614680 DE1614680C3 (en) 1967-12-13 1967-12-13 Electrical discharge vessel, in particular special HF power tubes

Publications (1)

Publication Number Publication Date
GB1237948A true GB1237948A (en) 1971-07-07

Family

ID=5682024

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1237948D Expired GB1237948A (en) 1967-12-13 1968-12-12

Country Status (3)

Country Link
US (1) US3591822A (en)
FR (1) FR1593831A (en)
GB (1) GB1237948A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1397852A (en) * 1972-09-08 1975-06-18 Siemens Ag Gas-tight and vacuu-tight carbon bodies
GB1397853A (en) * 1972-09-08 1975-06-18 Siemens Ag Heat-resistant gas-impermeable carbon bodies
DE2732960C2 (en) * 1977-07-21 1982-04-01 Philips Patentverwaltung Gmbh, 2000 Hamburg Hot cathode and process for its manufacture
US4302701A (en) * 1978-07-07 1981-11-24 Siemens Aktiengesellschaft Directly heated cathode for an electron tube with coaxial electrode design
DE2928993C2 (en) * 1979-07-18 1982-12-09 Philips Patentverwaltung Gmbh, 2000 Hamburg Process for the manufacture of an X-ray tube rotating anode
US4647748A (en) * 1984-05-17 1987-03-03 Smith International, Inc. Graphite electrode construction and method of making
WO1990012434A1 (en) * 1989-04-04 1990-10-18 Doduco Gmbh & Co. Dr. Eugen Dürrwächter Electrode for pulsed gas laser, and process for its manufacture

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL42073C (en) * 1932-05-07
DE1191494B (en) * 1961-09-29 1965-04-22 Siemens Ag Electrode made of a composite metal for electrical discharge vessels, especially heavy-duty anode
FR1344220A (en) * 1962-03-02 1963-11-29 Thomson Houston Comp Francaise Grid for electron tubes
US3348929A (en) * 1962-04-16 1967-10-24 Metalurgitschen Zd Lenin Protecting carbon materials from oxidation
US3320467A (en) * 1963-10-01 1967-05-16 Raytheon Co Pyrographite wave structures

Also Published As

Publication number Publication date
FR1593831A (en) 1970-06-01
US3591822A (en) 1971-07-06

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees