GB216160A - Improvements in or relating to incandescent cathodes for electric discharge tubes - Google Patents
Improvements in or relating to incandescent cathodes for electric discharge tubesInfo
- Publication number
- GB216160A GB216160A GB12202/24A GB1220224A GB216160A GB 216160 A GB216160 A GB 216160A GB 12202/24 A GB12202/24 A GB 12202/24A GB 1220224 A GB1220224 A GB 1220224A GB 216160 A GB216160 A GB 216160A
- Authority
- GB
- United Kingdom
- Prior art keywords
- wire
- vessel
- zirconium
- nitrogen
- titanium
- 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
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
- H01J1/02—Main electrodes
- H01J1/13—Solid thermionic cathodes
- H01J1/14—Solid thermionic cathodes characterised by the material
-
- 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
- H01J9/042—Manufacture, activation of the emissive part
-
- 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
- Y10T428/2933—Coated or with bond, impregnation or core
- Y10T428/294—Coated or with bond, impregnation or core including metal or compound thereof [excluding glass, ceramic and asbestos]
- Y10T428/2958—Metal or metal compound in coating
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Solid Thermionic Cathode (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
- Cold Cathode And The Manufacture (AREA)
Abstract
216,160. Naamlooze Vennootschap Philips' Gloeilampenfabrieken. May 18, 1923, [Convention date]. Enamelling.-A wire or other body is coated with nitride of zirconium, titanium or hafnium either singly or as a mixture of two or more by heating the wire &c. in an atmosphere containing an alkaline vapour or other reducing agent, nitrogen, and one or more dissociable compounds, such as the chlorides of zirconium, titanium or hafnium. The base may be nickel, but is preferably a refractory conductor such as platinum, rhodium, molybdenum, tungsten, or an alloy. In a process of coating wire with zirconium nitride, a mixture of nitrogen and' hydrogen containing 20 to 50 per cent of nitrogen is purified by passing through a tube 2 surrounded by a vessel 3 containing liquid air, and is then passed through a heated vessel 5 containing zirconium chloride. The gases containing zirconium chloride vapour then pass through a perforated tube 7 into a vessel 8 which is heated to a temperature of 150-300‹ C., and contains the wire 12 mounted on a sealed glass stopper 9. The wire is heated by passage of a current preferably to a temperature 1800‹ C., although for coating at a lower rate a temperature of 1000‹ C. is suitable. In the vessel 8 hydrogen combines with the chloride to form hydrochloric acid which is deposited in the cooled vessel 14, and the nitride formed by the combination of nitrogen with zirconium is precipitated on the wire. Zirconium chloride collected in the vessel 14 may be used again after freeing from hydrochloric acid. The thickness of the coating may be ascertained by measuring the resistance of the wire. The coated wire may be welded to nickel and should be " aged " after inserting in a bulb. Titanium nitride may be precipitated on a wire in a similar manner from titanium tetrachloride, and heating of the vessel 8 is unnecessary. The tetrachloride is reduced by hydrogen to trichloride which may be precipitated on the wall of the vessel 8.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL216160X | 1923-05-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB216160A true GB216160A (en) | 1925-09-17 |
Family
ID=19779084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB12202/24A Expired GB216160A (en) | 1923-05-18 | 1924-05-17 | Improvements in or relating to incandescent cathodes for electric discharge tubes |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US1794810A (en) |
| DE (1) | DE465276C (en) |
| FR (1) | FR581574A (en) |
| GB (1) | GB216160A (en) |
| NL (1) | NL16794C (en) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2671739A (en) * | 1949-06-22 | 1954-03-09 | Bell Telephone Labor Inc | Plating with sulfides, selenides, and tellurides of chromium, molybdenum, and tungsten |
| US2704727A (en) * | 1951-10-08 | 1955-03-22 | Ohio Commw Eng Co | Method of deposition of non-conductive copper coatings from vapor phase |
| US2717915A (en) * | 1952-11-13 | 1955-09-13 | Zalman M Shapiro | Apparatus for production of purified metals |
| DE1001239B (en) * | 1953-06-23 | 1957-01-24 | Metallgesellschaft Ag | Corrosion-resistant electrode for electrostatic precipitators |
| DE1078095B (en) * | 1953-07-13 | 1960-03-24 | Metallgesellschaft Ag | Corrosion-resistant discharge electrode for electrostatic precipitators |
| DE1101618B (en) * | 1953-10-02 | 1961-03-09 | Int Standard Electric Corp | Method for manufacturing an electrolytic capacitor with a titanium anode |
| DE1069448B (en) * | 1953-11-16 | 1959-11-19 | MetallgeseMschaft Aktiengesellschaft, Frankfurt/M | Gears |
| DE954301C (en) * | 1953-11-26 | 1956-12-13 | Metallgesellschaft Ag | Precision machine bearings with hardened surface |
| US2865791A (en) * | 1954-03-05 | 1958-12-23 | Metallgesellschaft Ag | Metal nitride coating process |
| DE1041320B (en) * | 1954-03-09 | 1958-10-16 | Metallgesellschaft Ag | Process for gas plating with refractory nitrides |
| DE1001873C2 (en) * | 1954-03-26 | 1957-07-11 | Metallgesellschaft Ag | Containers and other parts of apparatus for the production of metals from their halides |
| US2780553A (en) * | 1955-07-07 | 1957-02-05 | Ohio Commw Eng Co | Process of providing a controlled atmosphere containing a heat decomposable metal compound |
| US2822302A (en) * | 1956-01-16 | 1958-02-04 | Radio Mfg Company Inc | Non-emissive electrode |
| US2864731A (en) * | 1956-07-13 | 1958-12-16 | David H Gurinsky | Forming protective films on metal |
| US2926111A (en) * | 1958-04-03 | 1960-02-23 | Donald G Schweitzer | Method of forming a protective coating on ferrous metal surfaces |
| US2960642A (en) * | 1958-04-17 | 1960-11-15 | Quartz & Silice S A | Dielectric films and capacitors employing the same |
| US3089949A (en) * | 1958-11-28 | 1963-05-14 | Westinghouse Electric Corp | Arc welding method and article |
-
0
- NL NL16794D patent/NL16794C/xx active
- FR FR581574D patent/FR581574A/fr not_active Expired
-
1924
- 1924-05-09 DE DEN23173D patent/DE465276C/en not_active Expired
- 1924-05-14 US US713223A patent/US1794810A/en not_active Expired - Lifetime
- 1924-05-17 GB GB12202/24A patent/GB216160A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US1794810A (en) | 1931-03-03 |
| FR581574A (en) | 1924-12-02 |
| DE465276C (en) | 1928-09-15 |
| NL16794C (en) |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB216160A (en) | Improvements in or relating to incandescent cathodes for electric discharge tubes | |
| Brown et al. | Corrosion by chlorine and by hydrogen chloride at high temperatures | |
| US2239551A (en) | Method of making sealing glasses and seals for quartz lamps | |
| Davies et al. | 686. Glow-discharge electrolysis. Part I. The anodic formation of hydrogen peroxide in inert electrolytes | |
| GB249067A (en) | Improved process of precipitating metals on an incandescent body | |
| US1173012A (en) | Reduction of chlorids. | |
| Taylor et al. | Reduction of metal oxides by hydrogen | |
| US1576083A (en) | Method of refining gallium metal | |
| GB367820A (en) | Improvements in or relating to coatings for filaments and methods of applying the same | |
| US1707637A (en) | Method of producing metallic cesium | |
| SU1764A1 (en) | Glow cathode for discharge tubes and method of its manufacture | |
| Palmer | A Study of the Oxidation of Copper and the Reduction of Copper Oxide by a New Method | |
| Hurd et al. | Studies of the Conduction Process in Glass I. Replacement of the Sodium by Alkali Metals and Ammonium | |
| MacNevin et al. | Electrolytic Separation of Rhodium from Iridium at Controlled Cathode Potential | |
| GB321914A (en) | An improved process for coating metallic or non-metallic bodies with chromium | |
| Swett | Apparatus for the Determination of Arsenic. | |
| GB223244A (en) | Improvements in or relating to precipitating chemical compounds on an incandescent body and of isolating the said chemical compounds | |
| JPH0345861B2 (en) | ||
| GB352756A (en) | Improvements in and relating to gaseous electric discharge devices | |
| Reed et al. | Analysis of beryllium carbide | |
| Andrews et al. | The comparison of certain commercial getters | |
| Randall et al. | The effect of phosphorus vapour on reactions between incandescent tungsten, water vapour and oxygen in the presence of an inert gas | |
| GB223564A (en) | Improvements in or relating to incandescent cathode discharge tubes | |
| GB329854A (en) | ||
| Harris | The determination of aluminium oxide in metallic aluminium |