Low sag tungsten filaments and their use in lamps

Details Low sag tungsten filaments and their use in lamps Low sag tungsten filaments and their use in lamps

H - Electricity

01

K

75/59, 313/172.1

H01K 1/08 (2006.01) C22C 27/04 (2006.01) H01J 1/14 (2006.01)

Patent

CA 2039785

Improved tungsten filaments having good sag resistance and useful in energy efficient, high intensity lamps having a microstructure comprising a large, elongated and interlocking grain structure, methods for producing same and their use in electric lamps. Such filaments have been successfully used in miniature, double end quartz, tungsten-halogen lamps having IR filters.

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