lieu these devices
various forms electro dynamic induction- 50
machines, including the combined motors and
generators, have been devised. alternating-current magneto-ma
chine used the source ofsupply.
NIKOLA TESLA, NEW YOKE, Y. some cases ordinary forms ofinduc
tion-coil have been used with one coil the
transmitting-circuit and the other local
40 consumption circuit, the coils being differ
ently proportioned according the work to
be done the consumption-circuit-—
that is
to say, the work requires current higher
potential than that the transmission circuit
45 the secondary induced coil greater
length and resistance than the primary,while,
on the other hand, quantity current of
lower potential wanted the longer coil is
made the primary.
The general character the devices em-
30 ployed these systems now well under
stood.
In carrying out invention provide á
series inducing-coils and corresponding in- 95
duced coils,which, preference, wind upon
a core closed upon itself—such asan annulus or
ring subdivided the usual manner. The motor-coils are generally of
fine wire and the generator-coils coarser
wire, produce current greater
quantity and lower potential than the line-cur
rent, which relatively high potential, 6c
avoid loss long transmission.
SPECIFICATION forming part Letters Patent No. 80
The form converter transformer which
I have devised appears largely free from
the defects and objections which have al
luded. The
. similar ar
rangement wind coils corresponding to
those described ring similar core, and
by means commutator suitable kind to
direct the current through the inducing-coils 65
successively, maintain movement of
the poles the core and the lines force
which set the currents the induced coils., ASSIGNOR ONE-HALF CHARLES
F.
These consist induction-machines various
kinds. PECK, ENGLEWOOD, NEW JERSEY.United States Patent Office. Serial No.)
To all idiom concern:
Be known that Nikola Tesla, from
Smiljan Lika, border country Austria-Hun
gary,now residing New York,in the county
5 and State New York, have invented certain
new and useful Improvements Systems of
Electrical Distribution, which the following
is specification, reference being had the
drawings accompanying and forming part of
ro the same.
This invention relates those systems of
electrical distribution which current from
a single source supply main trans
mitting circuit caused induce means
15 suitable induction apparatus current or
currents independent working circuit or
circuits. The cur
rent developed thereby conducted through
a transmission-circuit one more distant
35 points which the transformers are located. For instance,
a motor constructed accordance with well-
understood principles, and the same arma
ture are wound induced coils which constitute ,j
a generator. 258,787.
The main objects the invention are the
same have been heretofore obtained the
20 use these systems—viz. 381,970, dated May 1,1888.
Application filed December 23, 1887. While not herein advance any
theory its mode operation, would 85
state that, far the principal con
struction concerned, analogous those
transformers which have above described as
electro -dynamic induction -machines, except
that involves moving parts whatever,and 90
is hence not liable wear other derange
ment, and requires more attention than the
other and more common induction-machines. (No model. The transformers are very liable to
be injured aud burned out, and the means re
sorted for curing this and other defects
have almost invariably been the expense of
efficiency.
SYSTEM ELECTRICAL DISTRIBUTION., divide the cur
rent from single source,whereby number
of lamps, motors, other translating devices
may independently controlled and operated
by the same source current, and some
25 cases toreduce current high potential in
the main circuit one greater quantity and
lower potential the independent consump
tion working circuit circuits.
Without enumeratingthe objections these
systems detail, will suffice say that the 70
theory the principle the action opera
tion these devices has apparently been so
little understood that their proper construc
tion and use have the present time been
attended with various difficulties and great 75
expense
