25 the drawings the present invention is
illustrated diagrams, which are hereinafter
separately referred to.
The fiekl-helices may connected shown
in Fig.
H commutator ordinary construction.
The auxiliary brush cis connected the point
35 soof the main circuit means the wire c'. of
the solenoid-helix connected with the
brush move the same, and Fig. the
regulation very sensitive the slightest
changes; but the relative position the aux- 75
iliary brush the main brushes maybe varied
by moving the main brushes, both main
and auxiliary brushes maybe moved, illus
trated Fig.
In Figure and are the positive aucl
negative brushes the main circuit, and c
30 auxiliary brush. all cases
the adjustment may such that when the 85
machine running with the ordinary load no
current flows over the auxiliary brush.
From that which has been said the ap
plication above referred will seen that
when the electro-motive force between the
40 brushes and the electro-motive force
between the brushes and the resistance
of the circuit the resistance of
the circuit the potentials the
points and will equal, and current
45 will pass over the auxiliary brush but if
said brush occupies different position rela
tively the main brashes the electric condi
tion disturbed, and current will flow either
from from according the
50 relative position the brushes. the latter two cases, it
will understood, the motion the main 80
brushes relatively the neutral line the
machine causes variations the strength of
the current independently their relative
position the auxiliary brush. and 95
The arrangement shown Fig. advan
tageous, diminishes the sparking upon
the commutator, the main circuit being closed
through the auxiliary brushes the moment
of the break the circuit the main brushes.
In practice sufficient move only the
auxiliary brusli, shown Fig. 10a
. and Instead
of shunting the whole the field-helices, a
portion only such helices may shunted,
as shown Figs. and have represented some 60
the automatic means that may used for
moving the brushes.
My invention designed provide im
proved method for regulating the current in
dynamo-electric machines. the
core shown within the helix and ós
connected with both brushes and to
move the same toward from each other,
according the strength the current the
helix, the helix being within iron tube, S',
that becomes magnetized aud increases the 7c
action the solenoid.)
To all whom concern:
Beit known that Nikola Tesla, Smil-
janLika, border country Austria-Hungary,
have invented Improvement Dynamo-
5 Electric Machines, which the following a
specification. the second
case the current will increased and the
magnets will gain strength.tates ffice. 165,793, fileciby
me May 18, 1885, have shown method for
regulating the current dynamo having
the field-helices shunt. The main circuit ex
tends from the brushes and usual, and
contains the helices the field-wire and
the electric lamps other working devices.
According the relative position upon the
20 commutator the respective brushes more or
less current caused pass through the
helices the field, and the current developed
by the machine can varied will vary
ing the relative positions the brushes.NIKOLA TESLA, SMILJAN LIKA, AUSTRIA-HUNGARY, ASSIGNOR THE
TESLA ELECTRIC LIGHT AND MANUFACTURING COMPANY, RAHWAY,
NEW JERSEY.
In Figs. the first
case the current through the field-helices will
be partly neutralized and the magnetism of
the field-magnets diminished. 1G7.
io another application, No.
REGULATOR FOR DYNAMO-ELECTRIC MACHINES. The core Fig.
In improvement employ one more
auxiliary brushes, means which shunt
a portion the whole the field-helices.1H6. 336,962, dated March 1886.
. Serial Xo.
Application filed June 1,1885.
SPECIFICATION forming part Letters Patent No. part the field-helices maybe
intheoutgoing and the otlierpartin the return 90
circuit, and two auxiliary brushes may be
employed shown Figs. present ap
plication relates dynamo having its field-
15 helices connected the main circuit. combining 55
with the brushes any automatic regulat
ing mechanism the current developed can be
regulated automatically proportion the
demands the working-circuit. (Xo model
