Improvements in the Construction of Armatures for Dynamo Electric Machines and Electric Motors.
Year: 1894

page_text: Date of Application, 22nd June, 1894-Accepted, 28th July, 1894
COMPLETE SPECIFICATION.
Improvements in the Construction of Armatures for Dynamo
Electric Machines and Electric Motors.
HENRY FRANCIS JOEL 44 Lavender Grove Dalston London, in the County of
Middlesex Electrical Engineer do hereby declare the nature of this invention and
in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:—
My invention consists in construction and arrangement of the wire coils of
armatures for dynamo electric machines and motors for use with continuous currents,.
or alternating currents of electricity.
In the drawings illustrating my invention like letters indicate like parts.
Fig. 1. is a top view of a complete armature.
Fig. 2. is an end view of the armature shewing the wire coils.
Fig. 3 & 4. are the outline or shape and side view of the separate coils.
Fig. 4 & 5. shew the geometrical arrangement of the separate coils.
I wind the wire coils in hanks, or on formers, to make independant separated'
armature coils such as described in my Patent No. 4607, 1881.
The special shaped coils I now use are shewn in Figs. 3, 4, 5, and 6. Fig. 3,.
shews a coil C, made up of many turns of wire and shewn lined in, or the alternative-
shaped coils, shewn clear.
These coils are made on a former, with the sides and ends equal and of a
symetrical shape all of one exact size and all equal in electrical resistance. For
convenience, I bring the ends out of one half of the coils for an armature, at the
opposite sides, as shewn at c, and w, Fig. 3.
Fig. 4, is a side view of coil C, shaped ready to place in position on the armature-
core. A coil is also shewn in position Fig. 2, at C, C', in dotted lines.
The core of my armature, which is shewn of the drum type, is made preferably
of the finest laminated iron with Paccinotti teeth.
I take a suitable number of the coils, say 60 as shown in Figs. 1, & 2, and
arrange them in pairs C, C, or W. W. and interspace and overlap the pairs of
coils loosely in position round the core, part of one side of the coils projecting out,
and the other part of the side, which 1 call the tail ends, shewn in Figs. 1, 5 & 6,
at d, d, being arranged and shaped, Fig. 4, to lay compactly side by side
horizontally in diagonal lines d, d, d, on an insulated sleeve over the axle A. and
passing inwards to the opposite side of the core and rising there into its right.
position.
When I have them all preliminarily arranged as above described I press the
parallel and equal flat sides into the grooves between the teeth of the core, and.
gradually work and mould them all into their positions to form the symetrical and
completed armature shewn in Figs. 1 & 2.
Figs. 5, & 6, shews the method of interspacing and overlapping, with the six
sided geometrically shaped coils, Fig. 5, the tail ends d, d, being at a more acute-
angle and shorter return from the projecting outside part, to the core; and in
Fig. 6, the tail ends d, d, have a longer return, both however with the same object.
and result, the grouping and arranging distinct, separately wound equal coils in a
compact and symetrical manner to form a symetrical coiling & ends, and electrically
an equal resistance armature.
The armature shown in Figs. 1, & 2, is a double wound armature with inter-
spacing coils, and is connected at the commutator as two independent armatures.
I have found this method of forming the coils and placing them side by side us
described, and connecting them in two distinct circuits is of advantage in the use

page_text: of the armatures for dynamos, and for with continuous current and alternating
current motors.
Having now particularly described and ascertained the nature of the said
invention, and in what manner it is to be performed I declare that what I
claim is
(1.) The method of winding an armature for use in dynamo electric machines
and continuous current and alternating current motors, with separately wound
equal sided coils, all of equal resistance, shaped and arranged to fit together
horizontally, and diagonally, so as to form a symetrical winding substantially as
described and illustrated in reference to Figs. 1, 2, 3, 4, 5 & 6.
(2.) The separately formed arinature coils specially shaped with equal sides
and equal ends substantially as shewn and described in reference to Figa. 3. 4.
5 & 6.
(3.) An armature constructed with the separately wound and equal coils, cou-
nected to form two distinct armature coilings and circuits, substantially as
described in reference to Figs. 1, 2, 3, 4, 5, & 6.
Dated this 22nd day of June 1894.
HENRY F. JOEL.