. Practical radiography : a handbook for physicians, surgeons, and other users of X-rays . Fig. 18. of Paris. Starting from the assumption that the lowefficiency of the ordinary type of coil is to be ascribed tothe great resistance of the secondary windings and toleakage taking place in the coil itself, they have inventeda new insulation consisting of some special hydrocarbonin the shape of a paste, which is claimed to be free. Fig. 19. from the disqualifying peculiarity of carbonizing after use. Fig. 20 shows the arrangement of such a coil; theprimary is similar in all respects to that of an
. Practical radiography : a handbook for physicians, surgeons, and other users of X-rays . Fig. 18. of Paris. Starting from the assumption that the lowefficiency of the ordinary type of coil is to be ascribed tothe great resistance of the secondary windings and toleakage taking place in the coil itself, they have inventeda new insulation consisting of some special hydrocarbonin the shape of a paste, which is claimed to be free. Fig. 19. from the disqualifying peculiarity of carbonizing after use. Fig. 20 shows the arrangement of such a coil; theprimary is similar in all respects to that of an ordinaryinduction coil. The secondary, however, consists of asingle bobbin of fine wire, weighing about lj lbs. only,which is placed midway on the primary, and supported bya block of wood (by means of two glass tubes, h); thewhole is enclosed in a glass cylinder and filled with the Induction Coils and Interrupters 57 special insulating paste. Owing to the small resistance £>fthe secondary, this coil gives very fat sparks, whichwould materially aid in obtaining short exposures, butfor some reason or other the instrument has come littleinto use, especially since some of the new interruptershave enabled us to attain high efficiency with ordinarycoils.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectxrays, bookyear1901
