4. The combination, with field-magnet .
.
3.
2. alternating-current motor, the com-
20 bination, with long and short field-cores, of
energizing-coils included independent cir
cuits, the coils the longer cores containing
an excess copper conductor over that in
the others, set forth.
What claim is—
1.416,193
higher self-induction are almost completely
surrounded iron, which the retardation
is considerably increased.
composed magnetic plates having open
center and pole-pieces cores different
length, coils surrounding said cores and 35
included independent circuits, the coils on
the longer cores containing excess cop
per over that the others and being set in
recesses the iron coreformed the plates,
as set forth. alternating -current motor having
two more energizing-circuits, the coils of
15 one circuit being composed conductors of
large size low resistance and those the
other fewer turns wire smaller size or
higher resistance, set forth. The combination, with field-magnet 25
composed magnetic plates having open
center and pole-pieces cores different
length, coils surrounding said cores and
included independent circuits, the coils on
the longer cores containing excess cop- 30
per over that the others, set forth.
Witnesses:
R obt. G
-aylord,
F rank Hartley.
I not claim herein, broadly, the method
5 and means securing rotation artificially
producing greater lag the current one
motor-circuit than the other, nor the use
of poles cores different magnetic sus
ceptibility, these are features which have
io specially claimed other applications filed
by me.
NIKOLA TESLA
