Another modification shown Fig. 6
this disposition modified, coil being
shown series with the two field-coils.
In this case only one armature-coil, is
included the line-circuit, while the other,
as is, short-circuited. alternating-current motor, the com
bination, with field-circuits different self- 55
inductive capacity, corresponding arma
ture-circuits electrically connected therewith,
as set forth.
NIKOLA TESLA. The armature-coils this case,
as the previous figure, are wound for dif
ferent self-induction correspond with the
iS field-coils. the two field-coils and-t'he arma-
30 ture-coil are multiple arc. outline the general form of
motor which have embodied this improve
ment.
Fig. 5.
Witnesses:
Robt. both instances, however,
there the advantage dispensing with one
contact-ring.
2, where only one armature-coil em
ployed, the torque the start somewhat
reduced, while the tendency synchronism
is somewhatincreased.
2. Gaylord,
F rank tley.
In Fig. such disposition,
25 shown Fig. 4—that say,
io the two field-coils and two armature-coils are
in derivation themselves and series with
one another. the opposite conditions
would exist.
20 such disposition that shown Fig. Fig. The armature-coils are wound
to correspondwith the field-coils with respect
to their self-induction. 45
I not claim this application the method
or means operating double-circuit motor
by making its circuits different self-induc
tion any way retarding the phases of
current one circuit more than another, 50
having made these features subject other
applications; but
What claim is—
1. modification of
this plan shown Fig.
In the above description have made use
of the terms “armature” and field;” but 40
will understood that these are this case
convertible terms, for wliat true the
field equally the armature, except that
one stationary, the other capable rota
tion. alternating-current motor, the com
bination, with independent field-coils dif- 60
ferent self-induction, independent arma
ture-coils, one more circuit with the
field-coilsand the others short-circuited, set
forth.
Fig. represents disposition which
both armature and field are wound with two
5 sets coils, all multiple arc the line or
main circuit.416,191
tains effects corresponding the resultant
poles produced the two field-circuits. The circuit-connections between the 35
armature and field coils are made, indi
cated the previous figures,through brushes
and rings, which are not shown
