(H
om
odel. For example, adapt a
given type alternating-current generator I
may couple rigidly two complete machines, se
curing them that the requisite difference
in phase between the currents produced 65
each will obtained, may secure two
armatures the same shaft within the influ
ence the same field and with angular
displacement that will produce the proper
difference phase between the two currents, 70
or may secure two armatures the same
shaft with their coils symmetrically disposed,
and place two sets field-magnets such
angle secure the same result, or, finally,
I may wind the same armature the two sets 73
of coils alternately, such manner that
they will develop currents, the phases of
w'hich differ time sufficiently produce
rotation the motor. Sup
pose the generator has two independent gen
erating-coils which revolve between two pole-
pieces oppositely magnetized and that the
motor has energizing-coils that produce 93
any given time two magnetic poles one
element that tend set rotation the
motor.
30 The rate, therefore, which the different
phases impulses current the line-cir
cuits succeeded one another was little
greater than that which the armatui’e of
the generator revolved that without special
33 provision the generator required run at
very high speed obtain the best results. 273,992. generator thus constructed yields
four impulses reversals current each
revolution, two each its independent 100
.
In illustration the various conditions w'hich
I regard most importantto attainment
of the best results from the use motors of
this character, have heretofore used gener-
25 ally forms generator which the relations
of the induced current-generating coils and
field-magnets were such that but twoimpulses
or current are produced each coil sin
gle revolution the armature field cores. SerialBo.nited States Patent Office., ASSIGNOR THE TESLA ELECTRIC
COMPANY, SAME PLACE. This accom- 83
plish constructing the motors with fewer
poles than the generator, w'hich case their
speed will greater than that the gener
ator, the rate speed being higher the
number their poles relatively less.)
--------------------------------------- y
To all whom concern:
Be known that Nikola Tesla, sub
ject the Emperor Austria-Hungary, for
merly Smiljan, Lika, border country Aus-
5 tria-IIungary, but now residing New York,
in the county and State New'York, have in
vented certain new and useful Improvements
in Systems for the Electrical Transmission of
Power, w'hich the following specifica-
i tion, reference being had the drawings ac
companying and forming part the same. therefore adapt system any
of the various types multipolar alternat-
50 ing-current machines which yield consid
erable nuinberof current reversals orimpulses
for each revolution the armature ob
serving the main condition essential the
operation system that the phases the
currents the independent induced circuits 55
of the generator should not coincide, but ex-
liibitasufficient difference phase produce
the desired results.
Another feature invention the 8c
plan w'hich have devised for utilizing gen
erators and motors this type, whereby a
single generator maybe caused run num
ber motors either the same speed its
own all different speeds.
This invention improvement sys
tems ofelectrical distribution power where
in are employed motors having two more
15 independent energizing-circuits, through
which are passed alternating currents differ
ing phase that are produced magneto-
electric machine having independent induced
circuits, that are obtained from any other
20 suitable source orby any othersuitable means.
It well known that the most efficient re
sults are secured the operation such mo
tors when they are run high speeds; but as
40 the practicable rate speed much limited
by mechanical conditions, particularly the
case large generators, which w'ould re
quired when number motors are run from
a single source, have sought produce a
43 greater number current impulses slow'
or slower speed than that which the ordi
nary bipolar machines may economically
operated.
NIKOLA TESLA, NEW YORK, Y. may accomplish this in
a variety w'ays, which, however, vary only
in detail, since they are based upon the same 60
underlying principle.
SYSTEM ELECTRICAL TRANSMISSION POWER. 487,766, dated December 13, 1892.
SPECIFICATION forming’part Letters Patent No.
'ApplicationfiledM
ay15,1888. This 90
will understood from example
