GB309573A - - Google Patents

Info

Publication number
GB309573A
GB309573A GB8043/29A GB804329A GB309573A GB 309573 A GB309573 A GB 309573A GB 8043/29 A GB8043/29 A GB 8043/29A GB 804329 A GB804329 A GB 804329A GB 309573 A GB309573 A GB 309573A
Authority
GB
United Kingdom
Prior art keywords
thoria
gloeilampenfabrieken
recrystallized
diffuse
april
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
GB8043/29A
Other languages
English (en)
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB309573A publication Critical patent/GB309573A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K3/00—Apparatus or processes adapted to the manufacture, installing, removal, or maintenance of incandescent lamps or parts thereof
    • H01K3/02—Manufacture of incandescent bodies

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
  • Metal Extraction Processes (AREA)
  • Discharge Lamp (AREA)
GB8043/29A 1928-04-13 1929-03-12 Expired GB309573A (zh)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL309573T 1928-04-13

Publications (1)

Publication Number Publication Date
GB309573A true GB309573A (zh) 1929-11-21

Family

ID=31944929

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8043/29A Expired GB309573A (zh) 1928-04-13 1929-03-12

Country Status (4)

Country Link
DE (1) DE496847C (zh)
FR (1) FR671441A (zh)
GB (1) GB309573A (zh)
NL (1) NL25673C (zh)

Also Published As

Publication number Publication date
FR671441A (fr) 1929-12-12
NL25673C (zh)
DE496847C (de) 1930-04-28

Similar Documents

Publication Publication Date Title
GB309573A (zh)
GB421489A (en) Process for the production of electrical heating bodies
GB341465A (en) Improvements in or relating to heater elements for electric discharge devices and to methods of making such elements
GB443535A (en) Improvements in or relating to indirectly heated cathodes for electric discharge tubes
GB371123A (en) Improvements in windows for electric discharge tubes for the emission of x-rays or cathode rays
GB447567A (en) Improvements in the manufacture of massive bodies of density greater than that of lead
GB211825A (en) Improvements in or relating to electric discharge-tubes with a glow cathode
USD92408S (en) Design fob a girdle
USD132858S (en) Stem base for an electron tube or similar article
GB493487A (en) Improvements relating to thermionic valves
GB367336A (en) Process for the manufacture of hot cathodes for electric discharge tubes
GB478733A (en) Improvements in methods of applying luminescent substances to the surface of a vitreous body, other than the envelope of a luminous electric discharge lamp or tube
GB289417A (en) Improvements relating to thermionic valves or electron discharge tubes
GB358447A (en) Improvements in and relating to the manufacture of iron or steel
AU1463333A (en) Method of manufacturing indirectly heated incandescent cathodes
AU109401B2 (en) Methods and means for rapid heating of electron-discharge tube filaments
AU101600B2 (en) Chemical reaction process utilizing coherer action
GB286999A (en) Improvements relating to thermionic valves or electron discharge tubes
GB313151A (en) Process for the manufacture of oxide sulphide and haloid cathodes for electric discharge devices
GB231821A (en) Improvements in electric discharge tubes
AU6136A (en) Chemical reaction process utilizing coherer action
GB632632A (en) Improvements relating to the manufacture of titanium plated metal bodies
GB321914A (en) An improved process for coating metallic or non-metallic bodies with chromium
AU2059924A (en) Improvements in or relating tothe manufacture of filaments for electric lamps, thermionic tubes andthe like
CA316984A (en) Process of producing aqua ammonia