4—that say,
io the two field-coils and two armature-coils are
in derivation themselves and series with
one another. 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. The armature-coils this case,
as the previous figure, are wound for dif
ferent self-induction correspond with the
iS field-coils.
Another modification shown Fig. represents disposition which
both armature and field are wound with two
5 sets coils, all multiple arc the line or
main circuit.
Witnesses:
Robt. the two field-coils and-t'he arma-
30 ture-coil are multiple arc. such disposition,
25 shown Fig. Gaylord,
F rank tley.
Fig. modification of
this plan shown Fig. both instances, however,
there the advantage dispensing with one
contact-ring.
NIKOLA TESLA. outline the general form of
motor which have embodied this improve
ment. alternating-current motor, the com
bination, with field-circuits different self- 55
inductive capacity, corresponding arma
ture-circuits electrically connected therewith,
as set forth. The armature-coils are wound
to correspondwith the field-coils with respect
to their self-induction. 5.416,191
tains effects corresponding the resultant
poles produced the two field-circuits. 6
this disposition modified, coil being
shown series with the two field-coils.
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. the opposite conditions
would exist.
2, where only one armature-coil em
ployed, the torque the start somewhat
reduced, while the tendency synchronism
is somewhatincreased.
In this case only one armature-coil, is
included the line-circuit, while the other,
as is, short-circuited. Fig. 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.
20 such disposition that shown Fig.
In Fig. 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.
2
