Around this armature place say four poles, 60
D soft iron, and, usual all
alternating current machines, built in
sulated plates sections prevent the heat
ing that wouldotherwise occur.
Fig. previous patents the United States
notably those numbered 381,968 and
382,280, dated May 1888,1 have shown and
iS described system transmitting power by
meansof electro-magnetic generators and mo
tors.
ApplicationfiledO
ctober 20t 1888. Each these
cores surrounded energizing coil 65
and all these coils are connected the
main circuit from the generator series
or any other manner receive simultane
ously the current impulses delivered the
generator. This may accomplished various
ways, may best explained reference
45 the accompanying drawings, which—
Figure diagrammatic view mo
tor constructed accordance with inven
tion and generator connected therewith. have
30 also discovered that single alternating cur
rent may utilized produce progression
or shifting the magnetic poles motor
if the field magnets the same differ
ent magnetic susceptibility different parts
35 that the magnetic phases the same will
differ. The ef
fect being virtually produce shifting of
the points maximum magnetic effect simi- 95
lar that which takes place when two alter
nating energizing currents, differing phase
are used, explained the patents above
referred to.
SPECIFICATION forming’part Letters Patent No. The distinguishing feature this sys
tem was shown the progressive move
ment shifting the magnetic poles or
zo points maximum attraction motor, due
to the action effectof alternating currents
passed through independent energizing cir
cuits the motor. secure this result the
two currents must have different phases, the
25 best results being obtained when the two cur
rents differ quarter phase, other
words when the periodsof maximum potential
of one current coincide with the minimum pe
riods the other, and conversely.
ELECTROMAGNETIC MOTOR.)
To all whom concern:
Be known that Nikola Tesla, sub
ject the Emperor Austria-Hungary, from
Smiljan, Lika, border country Aiistria-
5 Hungary, and resident New York, the
county and State New York, have invented
certain new and useful Improvements Elec
tromagnetic Motors, which the following is
a specification, reference being had the
to drawings accompanying and forming part
of the same.
Let designate ordinary type alter
nating current generator the circuit of
which Connected motor motors,
according present invention.
. (N
om
odel. end view modified form of
50 armature for said motor. The essential difference being
that patented system the rotation ef- 100
. That say, the field magnets are
of such character that their different portions
will differently magnetized—in respect to
time—by the same current impulse, and so
4 disposed that the difference magnetic
phase will maintain i-otary progressive
shifting the points of,maximum magnetic
effect., ASSIGNOR THE TESLA ELECTRIC
COMPANY, SAME PLACE. 288,677.United States Patent Office. 534,436, dated ugust .
NIKOLA TESLA, NEW YORK, Y. con
struct such motor motors the following 55
manner: shaft mount armature C,
which for convenience illustration pre
sumed soft iron plate disk with two
cut-away portions bar with rounded ends. the cores are all the same 70
shape mass, composition, and the coils
are all wound the same alternately op
posite directions, rotation would pro
duced the passage through the coils a
current, whether alternating direct, since 75
the attractive forces the poles upon the
soft iron armature would developed simul
taneously and would counterbalance neu
tralize each other. But secure rotation I-
make, for example, the cores short with 80
their coils close their inner ends and the
cores long, with their coils removed from
the inner ends. this means secure a
difference the magnetic phases which the
poles exhibit, for while the short cores will 85
respond the magnetizing effect alter
nation impulse current the coils a
certain time, greater interval time will
elapse before the same magnetic intensity
will developed the ends the longer 90
coi’es, and practice have found that this
difference phase may utilized pro
duce the rotation the armature. SerialN
o
