, ASSIGNOR THE TESLA ELECTRIC
COMPANY, SAME PLACE.
3. The armature its shaft is
then mounted the bearings the lower
casting and the other part the frame placed 60
in position, dowel-pins any other means
being used secure the two parts proper
position.
20 The invention applicable generators
and motors generally, not only those which
1 have described former patents, and which
have independent circuits adapted for use in
my patented alternating current system, but
25 other continuous alternating current ma
chines, such have heretofore been more gen
erally used.
NIKOLA TESLA.
Application filed May 15.
2.
What claim is—
1. 3
is plan view one the parts the frame
and the armature, portion the latter being
35 cut away.
For example,I magnetizethe coresalternately,
as indicated the characters and will 70
be seen that the magnetic circuit between the
poles each part casting completed
through the solid iron side bars. (^To model.
NIKOLA TESLA, NEW YORK, Y.tbe Emperor ofAustria,from Smiljan, Lika,
border country Austria-Hungary, now re-
5 siding New York, the county and State
of New York, have invented certain new and
useful Improvementsin Dynamo-Electric Ma
chines and Motors, which the following a
specification, reference being had the draw-
to ings accompanying and forming part the
same.
In order secure easier fit cast the side
bars, and end pieces, that slots 65
are formed when the two parts are put to
gether.1888. frame forgenerators motorsbuilt up
oftwo superposed castings,each consisting ofa
rectangular frame with pole-pieces extending 90
inwardly from its ends, set forth. frame and field-magnet for generators
and motors built two rectangular cast
ings having pole-pieces extending inwardly
from their ends, the faces said pole-pieces 95
being curved afford clearance for the arma
ture and provided with energizing-coils, asset
forth.
The bearings for the armature-shaft are
cast the side bars, The field-coils are
either wound the pole-pieces or,preferably,
wound form aud then slipped over the 55
ends the pole-pieces.
In the drawings hereto annexed, which illus
trate improvements, Figure shows the
30 machine side elevation.
DYNAMO-ELECTRIC MACHINE MOTOR. 390,415, dated October 1888. Serial No. vertical
sectional view the field-magnets and frame
and end view the armature; and Fig.
SPECIFICATION forming part Letters Patent No.United States Patent Office.
Witnesses:
Robt. The bear
ings for the shaft are located the neutral
points the field,so that the armature-core 75
not affected the magnetic condition the
field.)
To all whom concern:
Be known that Nikola Tesla,asubject
of.
My improvement not restricted the use
of four pole-pieces, evident that each
pole-piece could divided more than four So
formed the shape thecasting. Pig.
This invention improvement the
construction dynamo magneto electric
machines motors, the improvement consist-
15 ing novel form frame and field-magnet
which renders the machine more solid and com
pact structure, which requires fewer parts,
and which involves less trouble and expense
in its manufacture. The lower part or
castingissecured toasuitable base after being
finished off. dynamo magneto electric machine
or motor the frame which built two
castings, each consisting end plates with 85
pole-pieces extending inwardly therefrom and
connecting side bars, set forth. These parts are identical size and
shape,and each consists the solid plates or
ends from which project inwardly the
40 cores and the side bars bridge-pieces,
E The precise shape these parts is
largely matter choice—that say, each
casting, shown, forms approximately-
reetangular frame; but may obviously be
45 more less oval, round, square without
departure fromthe invention.
This machine possesses many advantages. also prefer to
reduce the width the side bars, the
centerandtoso proportion the parts that when
the frame put together the spaces between
50 the pole-pieces will practically equal the
arcs which the surfaces the poles occupy.
I cast the field-magnets and frame two
parts. Gaylord,
Frank Hartleys
. 273,904
