"A fairy tale of electricity"
The group of Tesla's patents from the field of generating, trasmitting and
using polyphase alternating currents from the period between 1887 and 1890,
represents the foundation stone of the present-day electroenergetic epoch.
These patents guarantee the discoveries of induction and synchronous motor, of
the generator and transformer of polyphase alternating currents, of the ways of
connecting the electric circuit and of various other inventions in this field.
The photograph and the working model illustrate Tesla's first induction motor
for the two-phase alternating currents.