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Патент USA US3039718

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June 19, 1962
Filed April 29, 1957
United States Patent 0
Kenneth P. Gorman, % German Machine Co.,
480 S. Main St., Randolph, Mass.
Filed Apr. 29, 1957, Ser. No. 655,574
3 Claims. (Cl. 242-4)
The present invention relates to a device for supporting
toroidal coils particularly during the process of manu
facturing these coils.
Patented June 19, 1962
through. The outer surface of the cylindrical section
may be knurled for ease in handling. The diameter of
the bore 2 should be sufficient to ?t over a locating pin on
the winding machine. This locating pin, in turn, should
be so positioned as to permit the support of a core for oper
ative engagement with the rotatable split ring. Extend
ing upwardly from the upper surface 3 of the cylindrical
surface is a supporting column generally indicated at 4. .
This supporting column is formed with one longitudinal
10 surface comprising a quadrant are continuous with a seg
ment forming a wall of the bore 2. Walls 6 and 7 normal
to each other are continuous with the wall 5. The outer
ends of the walls 6 and 7 are continuous with the ‘wall
wound onto the split-ring and subsequently is transferred
8 which is a quadrant sector of a frustrum. At the upper
to the core by dropping the wire from the split-ring onto 15 end of this supporting member is a semi-cylindrical sup
porting head 9. This head is substantially a 180 degree are
the core as the split-ring is rotated. In the devices which
concentric with the bore 2 and with its diametrical edge
are commonly used for manufacturing coils in this fashion,
substantially aligned with one of the walls 6 or 7. The
it has been a common expedient in the art to secure the
core during the formation of the coil by a clamping ele
upper surface of this semi-cylindrical member provides a
ment. The clamp and core are rotated by the operator 20 top surface 10 for supporting a core 11. Projecting up
during the winding process in order to obtain an even
wardly from the opposite extremities of the supporting
head are a pair of pins 12 and 13 which are designed to
winding of the core. The operator must loosen the clamp
and tighten it once again about the core over already
engage a core 11 and secure it in position, preventing it
from being pulled forward towards the winding machine.
wound sections, at least once during each operation, in
order to completely wind a toroid. Very often the core 25 The pins 12 and 13 are preferably ?at and thin in cross
must be removed from the clamp several times during the
processing of a single coil for the purpose of permitting
The core 11 is placed upon the surface 10 by the opera
tor and the split ring 14 is opened and passed through the
individual segments to be wound. In addition to di?icul
ties in clamping and unclamping and in addition to the
core with the ring projecting through the arcuate recess
substantial time consumption performing such clamping 30 15. In this arrangement the ring 14 may be rotated in
In the art of toroidal coil winding it is common to wind
the doughnut-shaped cores which form the base of the
coils by passing a split-ring through the core. Wire is then
and unclamping operations the prior art structures utilized
for supporting cores were not satisfactory in properly
either a clockwise or counterclockwise direction and the
core 11 may also be rotated in either a clockwise or
centering a core for this winding procedure.
counterclockwise direction about the ring section which
The present invention is designed to overcome these de
passes through it. For winding of the side of the core 11,
fects of prior art structures and has other unenumerated 35 opposite the pins 12 and 13, the core 11 may be lifted
advantages which will be more clearly understood when
slightly to clear the wire which passes from the ring to
considered in connection with the accompanying drawings
the core and then rotated until the desired section is lo
in which:
cated between the two pins. The entire support may be
FIGURE 1 is a side elevation of the present invention,
slowly rotated as desired, by the operator, by grasping the
FIGURE 2 is a front elevation of the present invention, 40 support at its base 1.
FIGURE 3 is a top plan view of the present invention.
A modi?cation of this invention is illustrated in FIG
FIGURE 4 is a cross-sectional view taken along the
URES 5 and 6. In this modi?cation there is provided a
line 4—4 of FIGURE 1,
base support 30, similar to supporting base 1. This base
FIGURE 5 is a cross-sectional fragmentary view of a
39 is provided, however, with an oversize bore 31. With
modi?cation of the invention, and
45 in this oversize bore 31 there is positioned a cylindrical
FIGURE 6 is a cross-sectional view taken along the
“oil-lite” bearing 32 which comprises a sleeve of bearing
line 6—6 of FIGURE 5.
oil-impregnated metal. This bearing has an outer diame
This particular support illustrated and claimed in the
ter of approximately, for example, of :78" while the inner
present case is designed to be used in connection with
diameter of the bore may be, for example, 2%4". The
small toroidal coil winders. In machines of this general 50 bearing is preferably coextensive with the bore and is ad
type there is provided a drive mechanism and a removable
justably supported within the bore by a plurality of set
split ring driven thereby. This split ring which ordinarily
has a diameter of approximately 3" is formed with a
channel along its outer periphery adapted to receive a
screws 33. These set screws 33 may be arranged in two
groups, an upper group and a lower group. Each group
may comprise four set screws arranged radially and 90
quantity of wire. The ring is mounted on the drive mech 55 degrees from one another. By proper adjustment of the
anism and passed through the core to be wound into a
toroid coil. The core is mounted on the split ring by
set screws the bearing may be moved farther or closer
to one wall of the supporting base. In this manner small
merely opening the ring and passing it through the core
adjustments of the inner bearing may permit an adjustable
and then reclosing it. After the core is so mounted the
alignment of diiferent cores with the split ring. This type
ring is rotated in a reverse direction during which time a 60 of arrangement avoids the necessity of providing a plu
quantity of wire is wound upon the ring. After a desired
rality of diiferent sized supporting members for different
amount of wire is wound on the ring the end of the
types of cores.
wire is secured or passed about the core forming one
Having now described my invention I claim:
terminal of the toroidal coil. The split ring is then ro
1. A support for a core adapted to be used in a toroidal
tated in a forward direction and the wire is slipped from 65 core winding device comprising an arcuate surface having
the ring, upon each rotation of the ring, and transferred
to the core. Simultaneously, the core is slowly rotated to
obtain a distribution of the windings about the core.
an inner arcuate edge extending nearly 180°, a pair of
parallel pins extending normally from said surface at op
posite ends thereof, a cylindrical base having a longitudi
nal opening therethrough with the axis of said opening
The supporting member, illustrated in the accompanying
drawings, is rotatedly ?xed to the winding machines for 70 passing through the center of curvature of said arcuate
support of the core. In this structure there is provided a
inner edge, and a supporting arm integral at opposite ends
cylindrical base 1 having an axial bore 2 extending there
with said surface and the upper surface of said cylindrical
base and having at least part of one wall thereof parallel
with lines passing through and normal to said arcuate
2. A support for a core adapted to be used in a toroidal
core winding device comprising an arcuate surface of
nearly 180° adapted to support the bottom of said core,
a pair of pins extending normally from said surface at
opposite ends thereof and against which said core is
adapted to bear, a base having an opening with an axis
passing through the center of curvature of said arcuate 10
surface, said pins having ?attened surfaces radial with
respect to said axis and against which a toroidal core is
adapted to bear, and a supporting arm interconnecting said
base and surface.
supporting surface extending nearly 180° about a line nor
mal to a plane passing through said surface, said surface
adapted to slidingly support the bottom of a toroidal core,
a pair of parallel pins extending normally from said sur
face only at opposite ends thereof and adapted to engage
the wall of the bore of said core, a base having a longi
tudinal opening with an axis coincident with said line, and
a supporting arm interconnecting said base and surface.
References Cited in the ?le of this patent
Goddard _____________ __ Dec. 23, 1947
Great Britain __________ __ Oct. 18, 1950
3. For use with a split annular ring adapted to wind a 15
toroidal core, a toroidal core support having an arcuate
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