Serial 3To.i; or, 95
the part may wound the opposite di
rection, shown Figs. The working-circuit extends
from the brushes and usual, and con
tains electric lamps other devices, D',either
in series multiple arc. If,
for instance, the commutator-space between
the brushes and when the latter the
neutral point, diminished, current will 80
flow from the point over the shunt the
brush thus strengthening the current the
part M', and partly neutralizing the current
in the part but tbe space between the
brushes and increased, the current will 85
flow over the auxiliary brush opposite
direction, and the current will be
stregthened, and partly neutralized.
Application filed May 18, 1885.
50 and bare the positive and negative brushes
of the main working circuit, and the aux
iliary brush.
SPECIFICATION forming part Letters Patent No. Figs.)
To all w/iom may concern:
Be known that Nikola Tesla, Smil-
jan Lika, border country Austria-Hungary,
have invented Improvement Dynamo
'S Electric Machines, which the following a
specification.
H represents the commutator, with the
plates ordinary construction. (In this
case they are arranged shown Fig. TESLA, SMILJAN LIKA, AUSTRIA-HUNGARY, ASSIGNOR THE
TESLA ELECTRIC LIGHT AND MANUFACTURING COMPANY, RAHWAY,
NEW JERSEY.
In the drawings, Figure diagram illus
trating invention, showing one core the
40 field-magnets with one helix w
T
ound the
same direction throughout. now to
lie understood that when the auxiliary brush
c occupies such position upon the comma- 65
tutor that the electro-motive force between the
brushes and the electro-motive force
between the brushes and the resistance
of the circuit .
The object invention provide an
improved method for regulating the current
on dynamo-electric machines,
ro improvement make use two main
brushes, which the ends the helices of
the field-magnets are connected, and auxil
iary brush and branch shunt connection
from intermediate point the field-wire
15 the auxiliary brush.to the resistance of
the circuit the potentials the 70
points and will equal, and current
will flowoverthe auxiliary brush:butwhen the
brush occupies different position the po
tentials the points and will differ
ent, and current wall flow over the auxiliary 75
brush from the commutator, according
to the relative position the brushes.)
It will apparent that the respective cores
of the field-magnets are subjected the neu
tralizing intensifying effects the current 100
. Figs. 55
M represent the field-helices, the ends of
which are connected the main brushes a
and 6
= The branch shunt wire extends
from the auxiliary brush cto the circuit the
field-helices, and connected the same 60
an intermediate point, X.
Devices for automatically moving the
35 brushes dynamo-electric machines are well
known, and those made use machine
may any desired known character.
By combining with tbe brashes and c
any known automatic regulating mechanism 90
the current developed can regulated iu
proportion tbe demands the working-
circuit. and 3. 165,793. The parts and the field-wire
may wound thesame direction. and are
diagrams showing one core ofthe field-magnets
with portion the helices wound oppo
site directions. and arc diagrams
45 illustrating the electric devices that may be
employed for automatically adjusting the
brushes, and Fig. diagram illustrating
the positions the brushes when the machine
is being energized the start. 336,961, dated March 2,1886.
REGULATOR FOR DYNAMO-ELECTRIC MACHINES. i!N"o model.
By varying the relative position upon the
commutator the respective brushes auto-
30 matically proportion the varying elec
trical conditions the working-circuit the
current developed can regulated pro
portion the demands the working-circuit.,
NIKOLA.
•The relative positions the respective
brushes are varied, either automatically by
hand, that the shunt becomes inoperative
when the auxiliary brush has certain posi-
20 tion upon the commutator; but when said aux
iliary brush moved its relation the
main brushes, the latter are moved their
relation the auxiliary brush, the electric
coudition disturbed and more less tbe
25 current through the field-helices diverted
through the shunt current passed over
said shunt the field-helices
