May 15,1888.
uam o-electric ach otor. These twoparts are mounted
with their laces contact and such man
ner that the rotation the armature causes
the commutator turn upon the collector,
whereby the currents induced the coils are
taken offby thecollector-segmeutsand thence
conveyed off suitable conductors leading
from the collector-segments. Selecting as
an illustration commutator two segments
aS adapted for use with armature the coils
or coil which have but two free ends, con
nected respectively the said segments, the
bearing-surface the lace disk, and is
formed two metallic quadrant-segments and
40 two insulating-segments the same dimen
sions, and the face the disk should be
smoothed off, that the metal and insulating
segments are flush.
commutator for dynamo-electric machines.
A atu re-sh aft dy- 90.ofcommutator-segments, and,fourtli, toin-
crease the efficiency and safety and reduce the
cost the machine., ASSIGNOR ONE-HALF CHARLES
F.711. Thisis the gen- 55
eral plan the construction wliicTiI have in
vented; Aside from certain adjuncts, the na
ture aud functions which will hereinaf
ter set forth, this iueans commutation,will
bo seen possess many important advan- 60
tages. 3
is view from side 85
m odified form tato 5
a view details
g itu tra section odifica
tio sectio iew sam e. (No model. 382,845, dated. The part which takes the
pláce of,the usual brushes, what term thě
45 '‘collector,” disk the same character as
the commutator and having surface simi
larly formed with two insulating and two me
tallic segments.
Application filed April 30,1887. ,
15 The objects tlíc invention ai'e, first,, to
avoid the sparking and the gradual wearing
away destruction the coinmutator-seg
ments and brushes collectors resulting
therefrom; second, obviate the necessity of
20 readjustmentofthecommutator thebrushes
or collectors and other consequences the
wear the same; third, render practicable •
the construction very large dynamo-electric
machines and motors with the minimum mim-
25 ber.United States Patent Office.)
To all whom concern:
B known that from
Smiljan, Lika, bordercountry ofAustria-Hun
gary,atpresentresidinginthecity, county, and
5 State New York, have invented certain new
and useful Improvements Commutators for
Dynamo -Electric Machines and Motors, of
which the following is-a specification, refer
ence beingbad the drawings accompanying
io and forming part .
This invention relates dynamo electric
machines motors, and improvement in
the devices for commutating and collecting the
currents. S36.
A sleeve tin aterial d
th aft, secu red lace screw a',-o r
b ita eans. The first resuijts a
reduction which amounts practically sup
pression the spark, sincethe break and the 70
short circuit produce Opposite effects the
armature-coil. The second has the effect of
diminishing the destructive effect spark,
since this would bein measure proportioned
totheduratiOD oftbespark.
In carrying out invention manner
to accomplish these results construct corn-
30 mutator and the collectors therefor two
parts mutually adapted one another, and, so
£ar the essential features are concerned,
alike mechanical structure. PECK, ENGLEWOOD, NEW JERSEY.
T tato form 95
d isk hich segm ents, '
G sim ila show o
o ese segm ents, etal d
a electrio connection ith f
th anils seg.
The mechanical advantages will better
understood referring the accompanying
drawings, which— 8c
F tra itu section f
th ith com u
ta rrie ereo view e
in earin face collector. the first place the short-circuiting
aud breaking the armature-coil connected
to the commutator-segmentsoccur thesame
instant, and from the nature the construc
tion this will done with the greatest pre- 65
cisioii; secondly, the duration both the
break aud that the short circuit will re
duced minimum.of the same.wbilelesseningthe 75
duration the short circuit obviously ,in
creases the efficiency the machine.
NIKOLA TESLA, NEW YORK, Y. Serial No.
SPECIFICATION forming part Letters Patent No
