Convention, Volume 1;Volume 30 |
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Halaman 50
... metals . They have a high conductivity and a large posi- tive temperature coefficient . The former characteristic requires that the filaments be very fine and quite long if they are to be used in producing lamps giving a reasonably low ...
... metals . They have a high conductivity and a large posi- tive temperature coefficient . The former characteristic requires that the filaments be very fine and quite long if they are to be used in producing lamps giving a reasonably low ...
Halaman 52
... metal into a dense homogeneous shiny filament . " The specification states that the invention relates to the manufacture of luminants for electric lamps made of very pure refractory metals , such as tungsten , titanium , zirconium , and ...
... metal into a dense homogeneous shiny filament . " The specification states that the invention relates to the manufacture of luminants for electric lamps made of very pure refractory metals , such as tungsten , titanium , zirconium , and ...
Halaman 53
... metals can be obtained by known processes more or less pure ; or the pure oxides , hydrides , nitrides , or metals in a very fine powder or in a colloidal state of the oxide or collodial suspension of the pure metal can be employed ...
... metals can be obtained by known processes more or less pure ; or the pure oxides , hydrides , nitrides , or metals in a very fine powder or in a colloidal state of the oxide or collodial suspension of the pure metal can be employed ...
Halaman 54
... metals . The material that is obtained is in such a form that the filaments can be made by a process of squirting . The introduction of tungsten into this particular lamp has enabled an extraordinarily rapid advance to be made in the ...
... metals . The material that is obtained is in such a form that the filaments can be made by a process of squirting . The introduction of tungsten into this particular lamp has enabled an extraordinarily rapid advance to be made in the ...
Halaman 56
... impregnated carbon . The result is that any slags exuding from the positive carbon can no longer do any harm . At the same time , a greater length of the arc now becomes incandescent , since the rising metal vapors now follow the 56.
... impregnated carbon . The result is that any slags exuding from the positive carbon can no longer do any harm . At the same time , a greater length of the arc now becomes incandescent , since the rising metal vapors now follow the 56.
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