IMPROVEMENTS IN MEANS AND APPARATUS FOR MAKING THE CORES OF DISC, OR RING ARMATURES
Year: 1885

page_text: Diso or Ring. Armatures.
I FRANK WYNNE of 4 Carteret Street Queen Anne's Gate in the City of
Westminster and County of Middlesex Engineer do hereby declare the nature of
my said Invention for IMPROVEMENTS IN MEANS AND APPARATUS FOR MAKING
THE CORES OF DISC, OR RING ARMATURES" to be as follows:-
"
My Invention relates to that class of armature for dynamo electric machines
known as disc or ring armatures of which the well known "Brush" and
"Schuckert" armatures are examples the bobbins. of the armatures being wound
in pockets formed by the projection of the cheeks of laminated iron beyond the
armature core proper and about as far as the wire of the bobbbin extends beyond
the core proper. Amongst other plans of constructing the cores of the said armatures
a ribbon or band of iron is wound spirally and the cheeks are formed of laminated
strips or gap pieces interposed between the layers of the iron so wound.
This method of forming the projecting cheeks is imperfect inasmuch as the space
between the two adjacent bobbins being wedge shaped a different width of cheek
piece or cheek pieces is required in each consecutive layer. This in practice is
difficult to attain with sufficient accuracy or else two or more pieces being used to
fill up the space gaps of greater or less width are left.
My Invention consists in so shaping the band of iron of which the armature
core is wholly or partly made up that in the process of winding it may form the
pockets for the reception of the bobbins of the armature.
In a machine constructed according to my Invention a crank pin on a shaft
driven by ordinary gearing is connected to an arm by a connecting rod the said
arm working round on the end of the shaft as a centre and carrying a pawl. This
shaft carries the foundation ring or other suitable device on which the armature
core is to be wound. Affixed to the shaft is a ratchet wheel through which the
said shaft is driven round by the pawl a detent serving to hold the wheel when the
pawl is making its return stroke. The band iron of suitable width for the con-
struction of the armatures is wound on a drum to which a brake is attached to
produce a strain on the band iron but this may be replaced by a weight or spring
or other convenient device which it has to wind up and further strain may be
brought on the band iron by deflecting rollers or bars. A punch is provided through

page_text: or by which the strip of iron passes. This punch is worked by a connecting rod
and crank from the shaft. The punch proper and its die can be moved laterally as
required through a small distance by a hand wheel and screw to allow of slight
adjustment The ratchet wheel has as many teeth as there are pockets to be
provided in the armature core and these teeth are spaced in the same proportion
as the angular distance of the pockets from each other or thereabouts. The cranks
are so placed relatively to each other that when the ratchet wheel is being forced
round the punch proper is being lifted and when the operating pawl is making its
return stroke the punch proper is held by the detent and the punch is descending
and punching the band as required and before the ratchet wheel again begins
to be moved round the punch is raised and the band iron is free to be drawn
forwards.
It follows that the strip will be punched in such a way that the gaps punched
in it will succeed each other in the different coils one above the other subject to
slight differences as the diameter of the core increases which slight differences can
be corrected from time to time by varying the distance of the punch from tho
armature.
The winding of an intervening strip over which tape or other insulating material
is lapped may be effected simultaneously with the winding of the main strip for
giving proper insulation and air spaces. In this case the strip is alternately
wound with a narrow strip lapped with tape or other material which strip is about
the breadth of the core proper between the pockets of the armaturo core.
The narrow strip may be passed over rollers and a rotatory motion given by any
Buitable arrangement of gearing to a disc carrying a bobbin on which the tape is
wound. The strip passes through the centre of the disc and as it is traversed the
tape is lapped around it by the revolution of the said bobbin.
It is not absolutely necessary to have the punch and shaft of the winding
arrangement in mechanical connection as above described it can easily be conceived
how the suitable shaping of the strip could be effected by coiling short lengths say
half a circumference at a time marking where the punches should act and then
uncoiling it back under the punch, which could be worked by hand or power then
coiling this half circumference forward again permanently and an additional half
circumference is then to be marked as before and uncoiled for punching and so on
till the whole is coiled and punched.
In operating with the mechanism in this way to turn the armature ring on the
shaft half a revolution is given to the shaft the strip being then marked where
the punching is to be done and then drawn back under the punch by gearing the
tension of the strip being obtained by pressure of a brake on the shaft. Then after
rewinding this part of the strip permanently on the ring the shaft will be wound a
further half circumference the tension of the strip being obtained by pressure of the
brake on the drum from which the strip is wound. The half circumference of tho
strip would then be marked drawn backwards and so on to and fro winding a
whole circumference and unwinding a half circumference until the winding of the
core is completed.
'

page_text: Improvements in Means and Apparatus for Making the Cores of
Disc or Ring Armatures.
I FRANK WYNNE of 4 Carteret Street Queen Anne's Gate in the City of
Westminster and County of Middlesex 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:—
<<
44
My Invention relates to that class of armature for dynamo electric machines
known as disc or ring armatures of which the well known Brush" and
Schuckert" armatures are examples, the bobbins of the armatures being wound
in pockets formed by the projection of the cheeks of laminated iron beyond the
armature core proper and about as far as the wire of the bobbin extends beyond
the core proper Amongst other plans of constructing the cores of the said
armatures a ribbon or band of iron is wound spirally and the cheeks are formed
of laminated strips or gap pieces interposed between the layers of the iron so
wound.
This method of forming the projecting cheeks is imperfect inasmuch as the space
between the two adjacent bobbins being wedge shaped, a different width of cheek
piece or cheek pieces is required in each consecutive layer. This in practice is
difficult to attain with sufficient accuracy or else two or more pieces being used to
fill up the space, gaps of greater or less width are left.
My invention relates principally to means for so shaping and winding the band
of iron of which the armature core is wholly or partly made up that it forms the
pockets for the reception of the bobbins of the armature.
I will describe my invention with reference to the accompanying Drawings
wherein Figure 1 is an elevation of an apparatus constructed according to my.
Invention and Figure 2 is a plan in which portions of the apparatus are omitted to
prevent unnecessary complication.
A is a crank pin on a shaft E driven by ordinary gearing B. C. D The said
crank pin A is connected to an arm F by a connecting rod f, the said arm F
working round on the end, of the shaft H as a centre and carrying a pawl f³
This shaft H carries the foundation ring or other suitable device on which the
armature core is to be wound. Affixed to the shaft H is the ratchet wheel J
through which the said shaft is driven round by the pawl f', the detent L serving
to hold the wheel when the pawl f' is making its return stroke. N is a drum on
which band iron N of suitable width for the construction of the armatures is
wound. In the drawing the armature O is shewn nearly wound. A brako M² is
shewn attached to the shaft of the drum M to produce a strain on the band iron N
but this may be replaced by a weight or spring or other convenient device which it
has to wind up, and further strain may be brought on the band iron by rollers or
bars as at P P. Q is a punch through or by which the strip of iron N passes, the
said punch being shewn in detail in Figure 3. It is worked by a connecting rod
and crank R from the shaft E. The punch Q and die can be moved laterally
through a small distance nearer to or farther from O as required by the hand wheel

page_text: Ine
and screw S to allow of any slight adjustment which may be necessary.
ratchet wheel J has as many teeth as there are pockets N, to be provided in the
armature core and these teeth are spaced in the same proportion as the angular
distance of the pockets from each other or thereabouts. The cranks "A" and R
are so placed relatively to each other that when the pawl is forcing the wheel J
round the punch Q is being lifted and when the said pawl is making its return
stroke the wheel J being held by the detent L the punch Q is descending and
punching the band N as required and before the pawl again begins to force round
the wheel J, the punch Q is raised and the strip or band of iron N is free to be
drawn forward.
It follows that the strip N will be punched in such a way that the gaps punched
in it will succeed each other in the different coils one above the other subject to
slight differences as the diameter of the core increases, which slight differences can
be corrected from time to time by varying the distance of Q from 0.
Figure 4 shews a part of an armature wound of two parallel strips each of which
may of course be punched and wound separately The winding of an intervening
strip, over which tape or other insulating material is lapped, may be effected
simultaneously with the winding of the main strip for giving proper insulation
and air space.
Figure 1 shews the wide strip N being wound alternatively with a narrow
strip T lapped with tape or other material, which strip T is about the breadth of
the core proper between the pocket of the armature core.
The strip T may be passed over rollers t as shewn and a rotatory motion be
given by any suitable arrangement of gearing such as the wheels
and to the
disc carrying a bobbin a mounted eccentrically thereon and on which bobbin
tape is wound. The strip T passes through the centre of the wheel and disc t² as
shewn and as the said strip is traversed the tape is lapped around it by the
revolution of the said bobbin t³.
It is not absolutely necessary to have the punch Q and shaft H in mechanical
connection as hereinbefore described; it can easily be conceived how the suitablo
shaping of N could be effected by coiling short lengths say half a circumference at
a time, marking where the punches should act and then uncoiling it back under
the punch, which could be worked by hand or power as arranged, then coiling this
half circumference forward again permanently and an additional half circumference
is then to be marked as before and uncoiled for punching and so on till the whole
was coiled and punched. This would require a brake on the shaft H as well as on
the drum M and fast and loose gearing to wind the parts in opposite directions.
In operating with the mechanism in this way to turn the ring on the shaft H
half a revolution given to the said shaft the strip N being then marked where
the punching is to be done and then is drawn back under the punch Q by the
gearing on the drum M, the tension of the strip being obtained by the pressure of
the brake on the shaft H. Then after rewinding this part of the strip permanently
on the ring the shaft H will be wound a further half revolution the tension of the
strip being obtained by pressure of the brake on M The half circumference of N
would then be marked drawn backwards and so on to and fro, winding a whole
circumference and unwinding a half circumference until the winding of the core is
completed.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed I declare that what
I claim is
First. A machine for the manufacture of cores of the type hereinbefore mentioned,
consisting in the combination of a shaft or carrier for the ring or holder of the
armature core, and a drum or holder for the strip to be wound, and an intervening
punch, the said punch being operated and the ring or support of the armature core
being rotated by mechanism giving alternately operation to one and the other
substantially as hereinbefore described.

page_text: Second. In machines for winding armature cores of the typo hereinbefore
described the combination of a holder for an additional strip and means for winding
a tape or separator there around, the said strip being laid between the convolutions
of the main strip substantially as hereinbefore described.
Third. In apparatus for winding strip metal to form armature cores the com-
bination and use of a ratchet and pawl and carrier for the ring or support for the
core, and a punch so relatively arranged and operated that the divisions between
the cheeks can be marked and punched equally so as to form radiating cheek pieces
with parallel slots between them for the winding on of the coils substantially as
hereinbefore described.
Fourth. The method of and means for forming the cores of dynamo machines
armatures of the disc type, with projecting checks forming pockets within which
the armature coils are wound, the said method and means consisting in winding,
then marking, then unwinding, then punching, and then rewinding, and the
apparatus for effecting the same substantially as hereinbefore described.
Fifth. The arrangement and combination of parts constituting the machine
herein before described and illustrated in the accompanying Drawings.
DL:
11
L 1000