Illumination And Photometry
Illumination And Photometry
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> 1 n a qa 0) . Fl o tt) V ^ Q K ^ * ^a 120 ILLUMINATION AND PHOTOMETRY The magnetite arc is essentially a direct-current lamp. Its high efficiency and long life per trim may be combined with the advantages of alternating-current generation and distribution by the use of a rectifier to convert the energy into a unidirectional current. A very effective combination of mercury arc rectifier and constant-current transformer has been developed for this FIG. 79. Circuits of transformer set for magnet...ite arc operation.
purpose. The general scheme of the set is indicated in Fig. 79. The set is contained within a single iron case provided with facilities for air or oil cooling. The rectifier tubes have an average life of about 900 hours. The magnetite arc is also fur- nished for constant-potential operation equipped with a reflector which gives a form of light distribution suitable for interior illumination.
THE ELECTRIC ARC AND THE VACUUM TUBE 121 The mercury arc exhibits all the characteristics of a true metal- lic arc.
What to read after Illumination And Photometry?
You can find similar books in the "Read Also" column, or choose other free books by William E William Elgin Wickenden to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
> 1 n a qa 0) . Fl o tt) V ^ Q K ^ * ^a 120 ILLUMINATION AND PHOTOMETRY The magnetite arc is essentially a direct-current lamp. Its high efficiency and long life per trim may be combined with the advantages of alternating-current generation and distribution by the use of a rectifier to convert the energy into a unidirectional current. A very effective combination of mercury arc rectifier and constant-current transformer has been developed for this FIG. 79. Circuits of transformer set for magnet...ite arc operation.
purpose. The general scheme of the set is indicated in Fig. 79. The set is contained within a single iron case provided with facilities for air or oil cooling. The rectifier tubes have an average life of about 900 hours. The magnetite arc is also fur- nished for constant-potential operation equipped with a reflector which gives a form of light distribution suitable for interior illumination.
THE ELECTRIC ARC AND THE VACUUM TUBE 121 The mercury arc exhibits all the characteristics of a true metal- lic arc.
What to read after Illumination And Photometry?
You can find similar books in the "Read Also" column, or choose other free books by William E William Elgin Wickenden to read onlineMoreLess
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