US3130073A - Method of providing molybdenum wire with a carbon coating - Google Patents
Method of providing molybdenum wire with a carbon coating Download PDFInfo
- Publication number
- US3130073A US3130073A US97359A US9735961A US3130073A US 3130073 A US3130073 A US 3130073A US 97359 A US97359 A US 97359A US 9735961 A US9735961 A US 9735961A US 3130073 A US3130073 A US 3130073A
- Authority
- US
- United States
- Prior art keywords
- wire
- molybdenum wire
- carbon
- carbon coating
- 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
Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims description 21
- 229910052799 carbon Inorganic materials 0.000 title claims description 21
- 239000011248 coating agent Substances 0.000 title claims description 20
- 238000000576 coating method Methods 0.000 title claims description 20
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 title claims description 19
- 238000000034 method Methods 0.000 title claims description 10
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 claims description 26
- 238000010438 heat treatment Methods 0.000 claims description 9
- 239000001257 hydrogen Substances 0.000 claims description 7
- 229910052739 hydrogen Inorganic materials 0.000 claims description 7
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical class [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 6
- 239000000203 mixture Substances 0.000 description 4
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 4
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 3
- 229910052753 mercury Inorganic materials 0.000 description 3
- URBHJJGWUIXBFJ-UHFFFAOYSA-N [C].[Cl] Chemical compound [C].[Cl] URBHJJGWUIXBFJ-UHFFFAOYSA-N 0.000 description 2
- 229950005499 carbon tetrachloride Drugs 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 239000011733 molybdenum Substances 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 240000007313 Tilia cordata Species 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
- H01B13/065—Insulating conductors with lacquers or enamels
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
- C23C16/26—Deposition of carbon only
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/54—Apparatus specially adapted for continuous coating
- C23C16/545—Apparatus specially adapted for continuous coating for coating elongated substrates
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
- H01B3/10—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances metallic oxides
-
- 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
-
- 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
- H01J2893/0022—Manufacture
- H01J2893/0023—Manufacture carbonising and other surface treatments
-
- 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
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S118/00—Coating apparatus
- Y10S118/22—Wire and cord miscellaneous
-
- 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
-
- 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
- Y10T428/298—Physical dimension
Definitions
- the coated wire may readily be used for manufacturing with electrodes if, according to the invention the chlorine-carbon compound is chloroform (CHCl and the molybdenum wire is heated to a temperature below 1000 C. for so short a period of time that the thickness of the resulting carbon coating is less than two microns. It has been found that, when chloroform is used, heating to a temperature of from 800 to 950 C. is sufiicient to deposit carbon on the wire in the form of a layer which adheres firmly, provided that the thickness does not exceed 2 microns. Preferably the thickness of the coating is about 1 micron.
- the wire may readily be bent into any required shape without the carbon coating being detached or damaged.
- FIGURE 1 shows an apparatus for coating molybdenum wire according to the invention, whilst 3,130,073 Patented Apr. 21, 1964 ice FTGURE 2 shows a grid electrode made with the use of such a Wire.
- a molybdenum wire 1 having a diameter of microns runs from a take-off spool to a spool 3.
- the wire 1 is passed through glass tubes 4 and a vessel 5.
- the tubes 4 are secured in metal cups 6 connected to a current source 7 and filled with mercury 8. Since the mercury 8 does not wet the glass of the tubes 4, it does not flow away through these narrow tubes.
- the mercury 8 also acts as current supply conductors for the wire 1 within the vessel 5.
- the current source 7 is adjusted so that the wire 1 is heated to a temperature of from 800 C. to 950 C.
- the vessel 5 is filled with a mixture of chloroform vapour and an inert gas, for example hydrogen, which mixture is obtained by passing hydrogen through a tube 12 into a chamber 10 through chloroform 11, a mixture of gas of vapour then flowing to the vessel 5 through a connecting pipe 9.
- the chloroform 11 may, if required, be heated in order to bring the vapour concentration to the required value.
- the carbon coating if it becomes thicker than 2 microns, may crack or even scale off when the wire is bent about the stay rods.
- a method of coating a molybdenum Wire with carbon comprising the step of heating the molybdenum wire in an atmosphere consisting essentially of hydrogen and chloroform to a temperature not exceeding 1000 C. and at which the chloroform decomposes for a period of time during which a coating of carbon on the molybdenum wire not exceeding two microns in thickness is formed.
- a method of coating a molybdenum wire with car bon comprising heating the molybdenum Wire in an atmosphere consisting essentially of hydrogen and chloroform to a temperature of about 800 to 950 C. until a carbon coating one micron in thickness is formed on the molybdenum wire.
- a method of coating a molybdenum wire with carbon comprising heating the molybdenum wire in an atmosphere consisting essentially of chloroform and hydrogen at a temperature not exceeding 1000 C. and at which the chloroform decomposes and carbon is deposited on the wire, and continuing to heat the wire at that temperature only long enough to form a coating not exceeding two microns in thickness.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Resistance Heating (AREA)
Description
April 21, 1964 P. c. VAN DER LINDEN ETAL 3,
METHOD OF PROVIDING NOLYBDENUII WIRE WITH A CARBON COATING Filed March 21. 1961 BMW M T WWW EF Y PP b United States Patent 3,130,073 METHOD OF PRGVDING MOLYBDENUM WIRE WETH A CAREON COATEN'G Petr-n Corneiis van der Linden, Eieter van der Wei-f, and
Popito Reinder .Diiirsterhnis, all of Eindhoven, Netherlands, assigners to North American Philips Company, Inc, New York, N.Y., a corporation of Deiaware Filed Mar. 21, 1961, Ser. No. 97,359 Claims priority, application Netherlands Apr. 2, 1950 3 Claims. (Cl. 117-226) it is known that a Wire consisting of tantalum, molybdenum or tungsten can be provided with a carbon coating by heating it in a gas atmosphere containing inter alia compounds of chlorine and carbon, for example an atmosphere of carbontetrachloride and hydrogen. In this process, the wire is heated to at least 1100 C. and the carbon coating may have a thickness of from 24 to 125 microns. Such Wires are used for manufacturing gridelectrodes for electric discharge tubes which are heavily loaded electrically. Such a carbon-coated grid has a sat isfactory heat radiation and a slight primary emission when heated to a high temperature.
Because such a wire, however, cannot readily be bent, preferably a grid made from bare wire is coated. However, this is a complicated process, since heating such a grid to the required high temperature provides difficulty.
Hence, a process is to be preferred in which the wire is provided with a carbon coating having satisfactory adherence and then worked into a grid. However, this cannot readily be done by the known method, in particular if molybdenum wire is used, since this, when heated to a temperature exceeding 1000 C., is subject to structural changes and becomes brittle. However, even when using an atmosphere of carbontetrachloride (CCl heating to at least 1100 C. is required to ensure a carbon coating having satisfactory adherence. When heating in an atmosphere of hydrocarbons a far higher temperature is requircd.
It has now been found that it is nevertheless possible to provide a molybdenum wire with a carbon coating having satisfactory adherence without the mechanical properties of the molybdenum being changed, so that the coated wire may readily be used for manufacturing with electrodes if, according to the invention the chlorine-carbon compound is chloroform (CHCl and the molybdenum wire is heated to a temperature below 1000 C. for so short a period of time that the thickness of the resulting carbon coating is less than two microns. It has been found that, when chloroform is used, heating to a temperature of from 800 to 950 C. is sufiicient to deposit carbon on the wire in the form of a layer which adheres firmly, provided that the thickness does not exceed 2 microns. Preferably the thickness of the coating is about 1 micron. Thus, the wire may readily be bent into any required shape without the carbon coating being detached or damaged.
Only chloroform proves to be suitable for this method in contradistinction to the other chlorine carbon compounds.
In order that the invention may readily be carried into effect, an embodiment will now be described, by way of example, with reference to the accompanying diagrammatic drawings, in which:
FIGURE 1 shows an apparatus for coating molybdenum wire according to the invention, whilst 3,130,073 Patented Apr. 21, 1964 ice FTGURE 2 shows a grid electrode made with the use of such a Wire.
In FIGURE 1, a molybdenum wire 1 having a diameter of microns runs from a take-off spool to a spool 3. The wire 1 is passed through glass tubes 4 and a vessel 5. The tubes 4 are secured in metal cups 6 connected to a current source 7 and filled with mercury 8. Since the mercury 8 does not wet the glass of the tubes 4, it does not flow away through these narrow tubes. The mercury 8 also acts as current supply conductors for the wire 1 within the vessel 5. The current source 7 is adjusted so that the wire 1 is heated to a temperature of from 800 C. to 950 C.
The vessel 5 is filled with a mixture of chloroform vapour and an inert gas, for example hydrogen, which mixture is obtained by passing hydrogen through a tube 12 into a chamber 10 through chloroform 11, a mixture of gas of vapour then flowing to the vessel 5 through a connecting pipe 9. The chloroform 11 may, if required, be heated in order to bring the vapour concentration to the required value.
It has been found that, if the wire 1 is heated to a temperature of from 800 C. to 950 C. and travels through the vapour mixture in the vessel 5 for about 1 second, a carbon coating having a thickness of about 1 micron is obtained, which adheres extremely firmly to the wire 1. Such a coated wire can simply be wound to produce a grid 13 of the kind shown in FIGURE 2.
It has been found that the carbon coating, if it becomes thicker than 2 microns, may crack or even scale off when the wire is bent about the stay rods.
What is claimed is:
1. A method of coating a molybdenum Wire with carbon comprising the step of heating the molybdenum wire in an atmosphere consisting essentially of hydrogen and chloroform to a temperature not exceeding 1000 C. and at which the chloroform decomposes for a period of time during which a coating of carbon on the molybdenum wire not exceeding two microns in thickness is formed.
2. A method of coating a molybdenum wire with car bon comprising heating the molybdenum Wire in an atmosphere consisting essentially of hydrogen and chloroform to a temperature of about 800 to 950 C. until a carbon coating one micron in thickness is formed on the molybdenum wire.
3. A method of coating a molybdenum wire with carbon comprising heating the molybdenum wire in an atmosphere consisting essentially of chloroform and hydrogen at a temperature not exceeding 1000 C. and at which the chloroform decomposes and carbon is deposited on the wire, and continuing to heat the wire at that temperature only long enough to form a coating not exceeding two microns in thickness.
References Cited in the file of this patent UNITED STATES PATENTS 768,756 Kitsee Aug. 30, 1904 2,811,472 Snyder Oct. 29, 1957 FOREIGN PATENTS 7,655 Great Britain Oct. 18, 1906 343,676 Great Britain Feb. 26, 1931
Claims (1)
1. A METHOD OF COATING A MOLYBDENUM WIRE WITH CARBON COMPRISING THE STEP OF HEATING THE MOLYBDENUM WIRE IN AN ATMOSPHERE CONSISTING ESSENTIALLY OF HYDROGEN AND CHLOROFORM TO A TEMPERATURE NOT EXCEEDING 1000* C. AND AT WHICH THE CHLOROFORM DECOMPOSES FOR A PERIOD OF TIME DURING WHICH A COATING OF CARBON ON THE MOLYBDENUM WIRE NOT EXCEEDING TWO MICRONS IN THICKNESS IS FORMED.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL3130073X | 1960-04-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3130073A true US3130073A (en) | 1964-04-21 |
Family
ID=19877138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US97359A Expired - Lifetime US3130073A (en) | 1960-04-02 | 1961-03-21 | Method of providing molybdenum wire with a carbon coating |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US3130073A (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3379555A (en) * | 1964-05-01 | 1968-04-23 | Air Force Usa | Vapor deposition of pyrolytic graphite on tungsten |
| US3424603A (en) * | 1965-10-06 | 1969-01-28 | Us Air Force | Method for the manufacture of pyrolytically coated filaments |
| US3452711A (en) * | 1966-09-28 | 1969-07-01 | Gen Electric | Vacuum reactor for vapor deposition on continuous filaments |
| US3453986A (en) * | 1968-02-27 | 1969-07-08 | United Aircraft Corp | Reactor seal incorporating a slit orifice |
| US3453987A (en) * | 1968-02-27 | 1969-07-08 | United Aircraft Corp | Reactor seal incorporating a pivotal orifice member |
| US3463119A (en) * | 1968-01-30 | 1969-08-26 | United Aircraft Corp | Nickel-mercury amalgam seal |
| US3479205A (en) * | 1966-10-14 | 1969-11-18 | Gen Electric | Process for producing boron filament |
| US3533858A (en) * | 1967-11-02 | 1970-10-13 | Beckman Instruments Inc | Method of treating thermal conductivity detector filaments to avoid baseline drift |
| US3598084A (en) * | 1969-12-02 | 1971-08-10 | United Aircraft Corp | Vapor deposition chamber including sealing and heating means |
| US3683846A (en) * | 1968-10-29 | 1972-08-15 | Texaco Inc | Filament plating system |
| US4968527A (en) * | 1986-06-24 | 1990-11-06 | Sharp Kabushiki Kaisha | Method for the manufacture of pyrolytic graphite with high crystallinity and electrodes with the same for rechargeable batteries |
| EP0450760A1 (en) * | 1990-03-31 | 1991-10-09 | The Secretary Of State For Defence | Process for the manufacture of ceramic fibres |
| US5252359A (en) * | 1990-03-31 | 1993-10-12 | The British Petroleum Company P.L.C. | CVD process for the manufacture of ceramic fibers |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US768756A (en) * | 1902-10-07 | 1904-08-30 | Isidor Kitsee | Insulating electric conductor. |
| GB190607655A (en) * | 1905-07-26 | 1906-10-18 | Hans Kuzel | Increasing the Electrical Resistance of Metals. |
| GB343676A (en) * | 1930-01-07 | 1931-02-26 | John Philip Baxter | Production of carbon |
| US2811472A (en) * | 1953-10-12 | 1957-10-29 | Sylvania Electric Prod | Black grid wire coating, and a method and device for producing it |
-
1961
- 1961-03-21 US US97359A patent/US3130073A/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US768756A (en) * | 1902-10-07 | 1904-08-30 | Isidor Kitsee | Insulating electric conductor. |
| GB190607655A (en) * | 1905-07-26 | 1906-10-18 | Hans Kuzel | Increasing the Electrical Resistance of Metals. |
| GB343676A (en) * | 1930-01-07 | 1931-02-26 | John Philip Baxter | Production of carbon |
| US2811472A (en) * | 1953-10-12 | 1957-10-29 | Sylvania Electric Prod | Black grid wire coating, and a method and device for producing it |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3379555A (en) * | 1964-05-01 | 1968-04-23 | Air Force Usa | Vapor deposition of pyrolytic graphite on tungsten |
| US3424603A (en) * | 1965-10-06 | 1969-01-28 | Us Air Force | Method for the manufacture of pyrolytically coated filaments |
| US3452711A (en) * | 1966-09-28 | 1969-07-01 | Gen Electric | Vacuum reactor for vapor deposition on continuous filaments |
| US3479205A (en) * | 1966-10-14 | 1969-11-18 | Gen Electric | Process for producing boron filament |
| US3533858A (en) * | 1967-11-02 | 1970-10-13 | Beckman Instruments Inc | Method of treating thermal conductivity detector filaments to avoid baseline drift |
| US3463119A (en) * | 1968-01-30 | 1969-08-26 | United Aircraft Corp | Nickel-mercury amalgam seal |
| US3453986A (en) * | 1968-02-27 | 1969-07-08 | United Aircraft Corp | Reactor seal incorporating a slit orifice |
| US3453987A (en) * | 1968-02-27 | 1969-07-08 | United Aircraft Corp | Reactor seal incorporating a pivotal orifice member |
| US3683846A (en) * | 1968-10-29 | 1972-08-15 | Texaco Inc | Filament plating system |
| US3598084A (en) * | 1969-12-02 | 1971-08-10 | United Aircraft Corp | Vapor deposition chamber including sealing and heating means |
| US4968527A (en) * | 1986-06-24 | 1990-11-06 | Sharp Kabushiki Kaisha | Method for the manufacture of pyrolytic graphite with high crystallinity and electrodes with the same for rechargeable batteries |
| EP0450760A1 (en) * | 1990-03-31 | 1991-10-09 | The Secretary Of State For Defence | Process for the manufacture of ceramic fibres |
| US5252359A (en) * | 1990-03-31 | 1993-10-12 | The British Petroleum Company P.L.C. | CVD process for the manufacture of ceramic fibers |
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