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GB226654A - Improvements relating to thermionic valves or electron discharge tubes particularly for wireless signalling - Google Patents

Improvements relating to thermionic valves or electron discharge tubes particularly for wireless signalling

Info

Publication number
GB226654A
GB226654A GB2852523A GB2852523A GB226654A GB 226654 A GB226654 A GB 226654A GB 2852523 A GB2852523 A GB 2852523A GB 2852523 A GB2852523 A GB 2852523A GB 226654 A GB226654 A GB 226654A
Authority
GB
United Kingdom
Prior art keywords
core
platinum
layer
improvements relating
discharge tubes
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
GB2852523A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB2852523A priority Critical patent/GB226654A/en
Publication of GB226654A publication Critical patent/GB226654A/en
Expired legal-status Critical Current

Links

Classifications

    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Electrodes For Compound Or Non-Metal Manufacture (AREA)

Abstract

226,654. Levy, L. A. Nov. 12, 1923. Platinizing.-In the manufacture of a thermionic filament a layer of platinum is formed on an infusible core such as fused silica by coating the core with an organic compound as used for coating ceramic materials, and which, upon heating leaves the metal. For example a solution of platinous chloride with oil of rosemary and oil of lavender may be painted on the core, which is dried and heated to 500‹ C. The layer of platinum may be thickened by electrodeposition of platinum or other metal; or the surface of the core may be rendered conductive by using a reducing solution as in the manufacture of mirrors, and the layer thickened by electrolysis. Specifications 217,646 and 230,226, [both in Class 39 (i), Electric lamps, Arc &c.], are referred to.
GB2852523A 1923-11-12 1923-11-12 Improvements relating to thermionic valves or electron discharge tubes particularly for wireless signalling Expired GB226654A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2852523A GB226654A (en) 1923-11-12 1923-11-12 Improvements relating to thermionic valves or electron discharge tubes particularly for wireless signalling

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2852523A GB226654A (en) 1923-11-12 1923-11-12 Improvements relating to thermionic valves or electron discharge tubes particularly for wireless signalling

Publications (1)

Publication Number Publication Date
GB226654A true GB226654A (en) 1925-01-01

Family

ID=10277003

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2852523A Expired GB226654A (en) 1923-11-12 1923-11-12 Improvements relating to thermionic valves or electron discharge tubes particularly for wireless signalling

Country Status (1)

Country Link
GB (1) GB226654A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2248635A (en) * 1990-09-14 1992-04-15 Nippon Kin Eki Co Ltd Noble metal-containing overglaze color composition for ceramics containing also thorium resinate

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2248635A (en) * 1990-09-14 1992-04-15 Nippon Kin Eki Co Ltd Noble metal-containing overglaze color composition for ceramics containing also thorium resinate
US5273947A (en) * 1990-09-14 1993-12-28 Nippon Kin-Eki Co., Ltd. Noble metal-containing overglaze color composition for ceramics
GB2248635B (en) * 1990-09-14 1994-06-22 Nippon Kin Eki Co Ltd Noble metal-containing overglaze color composition for ceramics

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