Nikola Tesla Books
THE HIGH POTENTIAL TRANSFORMER 33 voltage at which the coil is to be operated, the speed of the interrupter, etc., and, as the specifications given in this book are culled from practical experience, it is useless to attempt an explanation of the process through which this data was obtained. Kicking Coils.-The kicking coil is a simple solenoid of comparatively coarse wire enclosing a core of iron wires tightly packed. It is preferable to the induction coil, with its primary and secondary, for use on 110-volt direct current circuits where a transformer cannot be used. The design here is also a matter of experimental work, and no attempt will be made to expound the theory. Complete specifications are given in succeeding chapters on the construction of the various outfits in which kicking coils are satisfactory.
