)
To all ivhom may concern:
Be known that Nikola Tesla, sub
ject the Emperor Austria, from Smiljan,
Lika, border country ofAustria-Hungary, now
5 residing New York, the county and"State
of New York, have invented certain new and
useful Improvements Eegulators for Alter
nating-Current Motors, which the following
is specification, reference being had the
10 drawings accompanying and forming part of
the same. broken section line
x Fig. Fig. diagram illustrating
the preferred manner applying the regu
lator ordinary forms motors, and Fig. The ends the core
are rounded off, fit closely the space
between the two poles and permit the core E
to turned.the convolutions which are parallel with
the axis the shaft.
The regulator may constructed many
ways secure the desired result; but the 70
best form which now aware shown
in Figs. employ
the regulator for the purpose varying the
speed these motors. Fig. handle, secured the 90
projecting end the shaft provided for
this purpose. 390,820, dated October 18S8. 60
Figure view side elevation the
regulator.
The construction this device, broadly, 55
do not claim invention; but this, to
gether with the manner applying and using
the same, which forms the subject in
vention, will now explain reference to
the accompanying drawings.
A pplication filed pril 21, 1SSS. 271,G32.
The regulator proper consists form of
converter transformer with one element ca-
30 pable movement with respect the other,
wherebytheinductiverelations may bealtered,
either manually automatically,for the pur
pose varying the strength the induced
current. 65
is similar diagram illustrating the applica
tion the device improved alternating-
current motors. The system for
use with which the invention more particu
larly designed one which the motors, or
what may certain cases their equiva
lents—the electrical transformers—have twoor
20 more independent energizing-circuits, which,
receiving current from correspondingsources,
act set progressive movement orshift-
ing the magnetic poles the motors; but
the invention also applicable other pnr-
25 poses, will hereinafter appear.
A represents frame iron, and would
here state that the plan which now invari
ably followed dividing all iron cores 75
which are subjected the influence alter
nating currents should adopted the con
struction this device. 95
The operation effect the device will be
understood reference the diagrams illus
trating the manner its application.United States Patent Office,
NIKOLA TESLA, NEW YOEK, Y.
Any means may employed for maintain
ing the core and secondary coil any given
position which turned the handle.
In Fig.
SPECIFICATION forming part etters Patent No. (Xommiel.
I) shaft mounted the side bars, D',
and which secured sectional iron core,
E,wound with induced secondary coil, 85
F, .
My invention improvement systems
for the electric transmission power; and it
consists means regulating the speed and
15 power the motor motors. prefer construct this device in
35 such manner tiiat the induced secondary
element may movable with respect the
other; and the improvement, far relates
merely the construction the device itself,
consists, essentially, the combination, with
40 two opposite magnetic poles, armature
wound with insulated coil and mounted on
a shaft, whereby may turned the de
sired extent within the field produced the
poles. and 2. Serial So. The normal position the core the
45 secondary element that which most
completely closesthe magnetic circuit between
the poles the primary element, and this
position its coil its most effective position
for the inductive action upon the primary
50 coils; but turning the movable core to
either side the induced currents delivered by
its coil become weaker until, movement
of the said core and coil through ninety de
grees, there will current delivered., ASSIGNOE THE TESLA ELEOTEIC
COMPANY.
B are the cores the inducing pri
mary coils said cores being integral with Sc
or bolted the frame any well-known
way. let represent ordinary alter
nating-current generator, the field-magnets 100
which are excited suitable source cur
rent, Let designate ordinary form of
. SAME PLACE.
REGULATOR FOR MOTORS
