Witnesses:
R ,
P.
2. arma
ture—for instance, simple disk mounted
to rotate freely axis—be brought into
proximity the core, movement rota
tion will imparted the disk, the diree-
io tion depending upon its position relativety to
the core, the tendency being turn the.
In'order lessen the cores the circulation
30 ■currents induced therein, the several see-,
tions are insulated from one another the
manner usually followed such cases. Each coreis composed three main
20 parts and and they are similarly
formed with straight portion body e,
around which the energizing-coil wound, a
curved arm extension and inwardly-
projecting pole end Each core made
25 two parts with their polar exten
sions reaching one direction and part C
between the other two and with its polar ex
tension reaching the opposite direction. por
tion the disk nearest the core from to
b, indicated Fig.
Between the cores their polar extensions is
mounted cylindrical similar armature
40 wound with magnetizing-coils that are
closed upon themselves, usual motors
of this general class. This action continues the
magnetic condition following that in
5 the manner above described. These
cores are wound with coils which are con
nected the same circuit, either parallel
•35 series, and supplied with alternating or
a pulsating current, preferably the former, by
a generator represented diagrammatically. For example,
the polar extensions the sections may be
wound surrounded closed coils in- 80
dicated dotted lines Fig. Any
armature—such, for instance, disk— 70
mounted this field would rotate from the
pole first exhibit its magnetism that
which exhibits later. The sections C,on the other hand, are
protected from the magnetizing influence of
50 the coil the interposed layers iron B. Let said figure represent cir
cular frame iron, from diametrically-oppo-. Upon
the weakening the current the magnetic
strength first diminishes, while the
sections Chave still their maximum strength;
but continue weaken the interior
sections are similarly weakened.
What claim is— 90
1. alternating--current motor, the
combination, with energizing-coil and a
core composed two parts, one protected
from magnetization the other interposed
between and the coil, armature 95
mounted with the influence the fields of
force produced said parts, set forth. The combination, alternating-cur
rent motor, rotating armature, frame
and field-magnets thereon, each composed of
an energizing-coil wound around core made
up outer and inner protected magnetic no
sections, each which formed orprovided
with independent laterally -extended pole,
pieces projections, herein described.rent alternating one, will now be
reversed, while bstill continues the first-im
parted polarity., rotation progression of
the maximum points ofthe field force. The combination, alternating-cur
rent motor, rotating armature, field-
magnet composed coil and core with 100
two sections proximity the coil and an
inner section between the same, the sections -
being formed provided with polar projec
tions extending opposite directions over or
around the armature, set forth. and C
may therefore considered separate field-
magnets, being extended act the 65
armature the most efficient positions, and
the effect similar that other forms
of motor—viz. The effect
of these coils will still more effectively
retard the magnetization the polar exten
sions C.
The operation this motor follows:
•When current impulse alternation di-
45 rected through the coils the sections B
of the cores, being the surface and close
proximity the coils, are immediately ener
gized. This action prin
ciple operation have embodied prac-
15 ticable form motor, which illustrated in
Fig.
It evident that the principle herein de
scribed may carried out conjunction 75
with other means, such have elsewhere
set forth, for securing more favorable or
efficient action the motor.
NIKOLA TESLA.
site points the interior which the cores
project. may 60
then begin exhibit opposite polarity,
which is.
I not wish understood limiting 85
myself any particular construction this
form motor, the same principle action
or operation may carried out great
variety forms. followed later similar change
on and this action continues. 105
3.
As the magnetism increases, however,
the sections are also energized; bat they do
not attain their maximum strength until a
certain time subsequent the exhibition by
55 the sections their maximum
