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Патент USA US2410859

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Nov. 12, 1946.
c. w. BAKER
2,410,859
SHOE SEWING MACHINE
Filed Aug. 29, 1944
2 Sheets-Sheet l
Nov. 12‘, 1946.
c. w. BAKER
2,410,859
SHOE SEWING MACHINE
Filed Aug. 29, 1944
2 Sheets-Sheet 2
Patented Nov. 12, 1946
2,410,859
UNITED STATES PATENT OFFICE
2,410,859
SHOE SEWING MACHINE
Corwin W. Baker, Stoneham, Mass, assignor to
United Shoe/‘Machinery Corporation, Flem
ington, N. 3., a corporation of New Jersey
Application August 29, 1944, Serial No. 551,669
13 Claims.
1
The present invention relates primarily to im
provements in shoe sewing machines constructed
and arranged to sew the upper to the sole of a
shoe ‘which is unsupported on a last and, more
(01. 112-62)
2
will be e?ective in applying pressure to the work
during stitch formation and in relieving the
pressure to prevent needle ?exure during work
feed. There is a likelihood that the pressure of
particularly in some aspects, to machines of the r" the horn on the work will be retained during the
type disclosed in United States Letters Patent to
feed if insu?icient motion is imparted by the op
Edward Quinn No. 2,142,966, granted January 3,
erating mechanism, the resiliency of the horn re
1939, and No. 2,332,599, granted October 26, 1943,
quiring an excessive amount of motion before the
and United States Letters Patent to Edward
pressure is fully relieved. Where insu?icient mo
Quinn and Alfred E. Morrill N0. 2,198,391, granted 10 tion to compensate for the resiliency of the horn
April 23, 1940..
is imparted, the pressure of the horn against the
The machines of these patents have stitch
work will be increased and decreased during each
forming devices including a straight hook needle
sewing cycle without fully relieving the pressure.
movable to feed the work, and a straight awl act
If suf?cient motion is imparted to the horn mech
ing to form a needle receiving perforation in the 15 anism, it may be a source of such excessive vi
work,- the needle and awl being arranged with
‘bration that the machine must be slowed down to
their points directed toward each other and the
accommodate it. If the pressure of the horn
work being clamped between a work support and
against the work is not fully relieved while the
presser foot during penetration and retraction of
work is unclamped and the needle is ?exed as a
the needle and awl. Before each feeding move 2'0 result, the work will become displaced from op
ment of thework starts, the presser foot is ac
erating position and, after the needle is with
tuated to relieve its clamping pressure on the
drawn, it will re-enter the Work at a’ position‘ out
work and the work is supported principally by
of line with the stitch previously inserted. Even;
the needle.
tually, after a series of sewing cycles, objection
A machine of the type disclosed in the above 25 able work displacement will 'occur unless the op
mentioned patents is intended'to operate upon a
erator forcibly restores the work to proper po
turn shoe or slipper in which the upper has pre
sition in the machine. Furthermore, the horn
viously been attached temporarily to the sole
requires a supporting carrier, which adds further
edge having a shoulder undercut with a stitch re
factors of resiliency and lost motion in the horn
ceiving groove. The machine applies permanent 30 mechanism, particularly where light-weight con
fastenings to the parts, comprising a row of
struction is essential from the standpoint of ra
stitches passing through the upper and the sub
pidity of operation and freedom from excessive
stance of the sole between the shoulder in the sole ‘ vibration. In the patented machines,‘ the‘ sup
edge and a stitch receiving channel spaced uni
porting carrier for the horn extends downwardly
formly from the sole edge, the needle entering 35 from the upper portion of the machine and tends
and emerging ‘from the same side of the sole.
to obscure the operator’s line of vision of the
The machine is provided also with a U-shaped
work. Under. some circumstances, such a down
horn of relatively light, resilient construction.
wardly extending carrier also may interfere with
The horn entersthe ankleuopening of the shoe
proper manipulation of the work as the sewing
being operated upon and presses the sole'later 40 operation progresses.
ally against the stitch forming and clamping
Due to the resiliency of the horn, itscarrier
members to retain the shouldered edge- and chan
and actuating mechanism’ of the patented ma
nel of the sole in proper sewing position while
chines, it is di?icult to adjust the actuating mech
the needle and awl operate.
.
-
anism for a full release of the pressure of the
In a sewing machine having stitch forming de 45 horn on a thick sole and to provide adequate
vices comprising straight work penetrating in
pressure for a thin, vfragile sole, since the move
struments, the flexibility of the penetrating in_
ment required to take up the resiliency may be
struments is greater than in a curved needle
‘greater than required in imparting a pressurere
type of machine and the penetrating instruments
leasing movement to the horn.~ If adjustments
are subject to greater flexure, particularly when 50 for athin-sole are madeand sole material of‘in
lateral pressure is applied to the work. 1 With a
straight needle machine equipped with a horn of
the type referred to for imparting lateral pres
creased» thickness is operated upon, the pressure
of the horn against the sole will beexcessive and,
as a result, the sole will be indented or cut by
the work engaging surfaces of the presser foot
sure to the work, it is difficult to provide high
speed operating mechanism for the horn which 55 and work support, which latter is formed with
2,410,859
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narrow channel entering edges. When the work
is indented or cut, the feeding movements are
impeded by the resistance offered in disengaging
the indentations from the edges of the work sup
port. If adjustments are made for a thick sole,
the horn pressure on a thin fragile sole will be
4
the sole yieldingly throughout each sewing cycle
toward the center of curvature of the work pene
trating instruments with a uniform pressure.
Accordingly the necessity of complicated horn
locking and actuating mechanisms such as are
employed in the patented machines are avoided.
Such a construction is rendered possible when
the work penetrating instruments comprise a
displaced from the work support during forma
curved awl and needle because of the inherent
tion of a stitch at a time when the sole should be
10 rigidity of said work penetrating instruments
subjected to a secure clamping pressure.
against ?exure toward their center of curvature.
Furthermore, the straight needle of the pat
The supporting members for the work penetrat
ented machines does not lend itself to precisely
ing instruments also are less ?exible than the
uniform lengths of stitches during sewing oper
corresponding parts in a straight needle machine
ations where the feeding movements are impeded
in any degree. The straight needle which imparts 15 so that while the clamping pressure of the presser
foot and work support on the shoe is released
the feeding movement to the work may become
the shoe will be retained in proper sewing posi
?exed excessively by the feed impeding pressure
tion by one only of the work penetrating instru
of the horn on a thick sole as a result of incom
ments engaging the shoe.
plete release when the mechanism has been set
In the illustrated form of the present machine,
for a relatively thin sole. This condition is 20
the mechanism for supporting and actuating the
aggravated by the resistance to work feed offered
too light and the channel in the sole may become
as a result of Work indentation.
As a means
horn includes a carrier on which the horn is
mounted for swinging movement and a spring
for avoiding displacement of a relatively thin
acting on the carrier to urge the sole with a
fragile sole from between the work support and
presser foot of the patented machines while the 25 continuous yielding pressure in the desired direc
tion, no other mechanisms being required for
clamping pressure of the presser foot is released,
actuating the horn during sewing operations to
there is disclosed in the Quinn Patent No.
avoid displacement while the shoe is unclamped.
2,332,599, a set of movable work engaging ele
Preferably the horn is of U-shape with one arm
ments on the work and presser foot acting to
guide the sole yieldingly and to prevent the edges 30 of sufficient length to enter the extremity of the
toe in the largest size of shoe intended to be
of the work support from becoming disengaged
operated upon, and with the other arm of the
from the channel.
horn mounted for swinging movement on the
To prevent undesirable indentation of the sole,
carrier about an axis disposed radially of the
the horn of the patented machines is actuated
with a relatively light clamping pressure during 85 needle path. The carrier also is U-shaped with
each sewing cycle at the end of each feeding
movement and is locked in position during stitch
formation to prevent the sole from being disen
gaged from between the work support and presser
its horn supporting arm of sufficient length to
provide clearance space for the heel end of the
largest size of shoe- operated upon. As a simple
means for mounting the carrier on the machine so
foot. The mechanism for locking and unlock 40 that it may move the horn yieldingly toward the
sole of the shoe, the carrier has a pivot on the
ing the horn at the proper times during each
frame of the machine extending substantially
sewing cycle adds to the expense of manufac
parallel to the line of feed. Mechanism also is
ture and upkeep of the machine and increases
provided in the illustrated form of this feature
the likelihood of disarrangement. Accordingly,
a greater degree of skill and ability must be 45 for actuating the carrier at the end of a seam to
move‘ the horn away from the sole of the shoe
exercised by the operator than when such mecha
so that the shoe may readily be removed from
nism is not employed.
the machine and a new shoe substituted.
The principal objects of the present invention
It is the usual practice in sewing. the inseams
are to provide a simple and effective machine for
performing the same type of work as that ac 50 of turn shoes to employ a curved hook needle
chain stitch machine so arranged as to lay the
complished with the machines of the above-iden
double threads of the chain against the upper of
ti?ed patents in which the difficulties arising
the shoe, thus reinforcing the upper and provid
from ?exibility of the work penetrating instru
ing a form of padding or ?lling for the bend in
ments, the horn, its carrier and actuating mecha
nism are largely avoided and in which a reliable 55 the upper after the shoe is turned inside out.
The common form of machine in which the pres
feeding movement with an unobstructed view of
ent invention is embodied, as hereinafter further
the work may be obtained during operation of
explained, is constructed to insert a lockstitch
the machine without frequent and complex ad
seam with but a single thread laid against each
justments or the provision of complicated horn
60 shoe part.
or other operating mechanisms.
A further object of the invention, accordingly,
is to provide a novel improved sewing machine of
the type referred to for laying a plurality of
threads in a lockstitch seam against that portion
of a turn shoe while unsupported on a last, hav
ing a work support to engage a stitch receiving 65 of a turn shoe upper which is supported by the
edge of a shoe sole according to accepted turn
channel formed in the sole, a presser foot acting
shoe practice while at the same time retaining
against the upper at the edge of the sole to
to full advantage the strength and durability of
clamp and release the shoe on the work support,
the lockstitch seam. To provide suitable rein
a horn extending through the ankle opening
forcement for the upper, according to a feature
of the shoe being operated upon and engaging
of the invention. therefore, two parallel lengths
the inner surface of the sole, and stitch forming
In accordance with these and other objects,
the present invention is illustrated as embodied
in a machine for sewing the upper to the sole
devices including one or more curved work pene
of locking. thread are led into the seam and laid
against the upper at the edge of the sole, thereby
trating instruments acting to support the sole
providing the same reinforcement to the upper
in position against the thrust of the horn while
the sole is unclamped, the horn acting to press 75 as when sewed in a chain stitch machine. In
2,410,859
.
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v5
the embodiment of this feature, the thread case
relieved, the work being supported in sewing po:
within which the locking thread supply is en
sition during this interval of each sewing cycle
principally by the awl. To assist in the'feeding
movement of the work the work support mem
ber HI which engages the channel in the sole in
closed is provided with two rotating thread pack- '
ages from which parallel lengths of locking thread
are directed against the exposed surface of the
upper, the packages being arranged to rotate in
opposite directions during withdrawal of thread
advance of the awl moves with the awl in the
line of the seam while the member I2 remains
so that the rotation of one package will not
stationary. During back feeding movements of
slacken or interfere with the tension required to
the awl the member it] opens the channel for the
withdraw thread from the other package. In this 10 awl.
'
way, any possibility of entanglement of locking
Referring more particularly to Figs. 4 to 7, in
threads within the thread case or of irregular for
clusive, of the drawings, the turn shoe illustrated
mation of stitches is avoided in the completed
as being operated upon comprises an upper 28,
seam from this cause.
cut to the proper size to form the shoe without
Other features of the invention consist of the 15 excess of material and a sole 30 having a stitch
devices, combinations, arrangements and parts
receiving channel 32 and a shouldered edge 34
hereinafter described and claimed which, to
molded to provide a groove opposite thebase of
gether with the advantages to be obtained, will
the channel within which the nibs on the presser .
readily be understood from the following descrip
foot project. The upper is temporarily attached
tion taken in connection with the accompanying 20 to the shouldered edge 34 by cement and before
drawings, in which
the machine is started into operation the chan
Fig, 1 is a, view in front elevation of a curved
nel 32 of the sole is engaged with the support
hook needle l-ockstitch shoe sewing machine em
members In and I2 and the presser foot com
bodying the present invention, only so much of
presses the substance of the sole and clamps the
the machine being illustrated as is necessary for 25 upper and sole in sewing position. When the
a complete disclosure of the invention;
machine is started the awl ?rst enters the chan
Fig. 2 is a detail side sectional view on an en
nel and emerges from the same side of the sole
larged scale of the shuttle, locking thread case
through the surface of the shoulder 34 and
and double locking thread supply within the
through the upper, as illustrated in Fig. 5. As
thread case employed in the machine of Fig. 1; 30 soon as the awl has penetrated the parts of the
Fig. 3 is a sectional plan view taken along the
line III-1II of Fig. 2, illustrating. the thread case
shoe, the presser foot releases its clamping pres
constructions ;
Fig. 4 is a view in right side elevation and part
movement to the position of Fig. 6, carrying the
ly in section, of the machine of Fig. 1;
_
Fig. 5 is a perspective detail View on an en
larged scale, illustrating the method of opera
tion of the stitch forming and work clamping de
sure on the upper, and the awl is given a feeding
awl perforation in the sole and upper into line
35 with the needle.
Thereafter, the needle enters
the upper along the shoulder 34 and emerges from
the channel 32 to receive a loop of thread. Upon
retraction of the needle, the needle loop is drawn
through the work and is carried about the thread
vices, particularly during the beginning of the
feeding movement of the awl;
40 case by the shuttle in the usual way. After being
Fig. 6 is a similar view,‘ illustrating the posi
drawn from the shuttle, the needle loop is con
tracted by a take-up 39 until the locking threads
tions of certain of the parts at the end of the
are drawn into engagement with the outer sur
feeding movement; and
face of the upper in the manner illustrated, the
Fig. 7 is a detail View, partly in section and on
a further enlarged scale, of a portion of a sewed 45 sole being clamped and supported by the work
support and presser foot and maintained in sew
shoe after turning it inside out.
ing position by a horn, as will be further ex
The sewing machine disclosed in thedrawings
plained.
has a work support consisting of two relatively
movable, relatively thin, wedge-shaped channel
As has been stated, the means to press the sole ’
engaging members I0 and 12 the latter of which 50 against the work support members it! and I2 and
?rmly into the space between the work support
is ?xed to the frame of the machine, a curved
hook needle [4, a curved awl 56, a work clamp
ing presser foot I 8 having a pair of nibs on its
and presser foot at a position to be engaged prop
erly by the stitch forming devices‘while the parts
work engaging surface to insure proper clamping
are clamped by the presser foot, the machine is
action along the outer shouldered edge of ‘a sole 55 equipped with the shoe entering horn indicated
at 36, extending through the ankle opening of
in a slipper turn type of shoe, and a rotary needle
the shoe upper and bearing against the inner sur
loop-taking shuttle 20 within which is disposed
a locking thread case 22. The machine is sub
stantially the same, except as hereinafter de
scribed, as that disclosed in United States Let
face of the sole with a uniform yielding pressure
at all times during sewing operations. The horn
60 36 is roughly of U shape with one ‘arm of‘greater
ters Patent No. 1,169,909, granted February 1,
length than the depth of the largest size of shoe
to be operated upon from the ankle opening to
1916, upon an application of Fred ‘Ashworth, and
No. 2,271,611, granted February 3, 1942, upon an
the extremity of the toe. The other arm of the
application of Fred Ashworth and Carl F. Whit
horn has an integral stud 38 supported in a bear
aker, the needle and awl being, mounted for os 65 ing 48 the axis of which is disposed radially of
the needle path. The bearing 40 is adjustably
cillation upon a supporting stud 24, closeto the
sewing point, and the presser foot l8 being mount
secured in a standard d2 having a downwardly
extending cylindrical lug clamped by a screw 43
ed for work clamping movement on a pivot 26.
within a socket 44 in one arm of a U~shaped car
The curvature of the needle and awl is con
centric with the axis of the stud 24 so that they 70 rier 45, the other arm of which is pivoted at 48
present their greatest rigidity and resistance to
to the machine ‘frame for swinging movement
?exure along a line extending radially toward
about an axis extending parallel to the seam line.
the axis of stud 24. The work is fed in the ma
When the screw 43 is loosened the standard 40
chine while the awl engages the work and the
may be raised, lowered or swung within the socket
work clamping pressure of the presser foot is 75 to right orleft to bring the point of engagement
2,410,859
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7
of the horn and shoe sole into line with the sewing
point.
'
The carrier 46 is formed with a sufficiently long
U bend beneath the horn stud 38 to provide a
clearance space for the heel end of the largest
size of shoe when the sole engaging'end of the
horn extends within the toe of the shoe. The
arrangement is such that unobstructed rotation
of the shoe and horn may take place about the
sufficient distance to cause the set screw 58 to
force the carrier 46 below its pivot 48 rearwardly.
thereby disengaging the horn above the pivot 48
from the shoe sole.
The work support member ID is moved with the
awl to assist in work feed and so that the channel
in the sole will be opened in advance of the point
of awl operation during back feeding movements
of the awl.
The member I 0 is formed with a
stud 38 without interference and the carrier being 10 shank portion secured within a chuck 59 mounted
on a movable carrier block 6|. The carrier block
disposed beneath the horn stud 38 in no way ob
is arranged for oscillation in the line of feed and
scures the shoe or the point of operation from
is connected with the awl feeding mechanism, as
easy visibility.
more fully disclosed in Patents No. 1,169,909 and
To urge the horn yieldingly in a radial direc
tion toward the center of curvature of the awl 15 No. 2,271,611 above referred to. The chuck 59 in
the machine of these latter patents is arranged to
and needle, the carrier 46 is acted upon at a loca
receive a work channeling or grooving knife when
tion below the pivot 48 by a compression spring
the work so requires. By utilizing the chuck 59
50 supported on a post 52 projecting from a slotted
to secure the work support member [0, a simple
block 54 through the slot of which pass a pair
of clamp screws 56 threaded into the machine 20 rearrangement of the machine of these patents
may be made to adapt the machine for use in
frame. Loosening the clamp screws 56 enables
sewing turn shoes. Before the shank of the sup
the position of the block 54 to be changed and
port member ID is secured by the chuck, the
the yielding force of the spring 58 to be varied.
vertical position of the support member may be
No mechanism in addition to the spring 55 is
employed for actuating the horn toward the work 25 adjusted in the chuck to suit the operating condi
tions of the machine. In some instances, the
support and presser foot or for locking the horn
support member may be formed with a cutting
during sewing operations. The horn is main
edge to increase the depth of the channel in the
tained with a uniform yielding pressure while
each stitch is being formed as well as during
feed of the sole and upper. The construction
ofthe horn and its carrier is such as to provide
sole if needed.
To reinforce the upper along the line of the
seam at a point which is subject to heavy tension
during wear of the shoe, in the use of the illus
trated machine, instead of employing a single
a substantial degree of resiliency which, together
with the resiliency of the spring 51), enables the
locking thread, a pairYof parallel locking threads
work engaging end of the horn to move toward
are led into the seam in such a way that they
and from the work support as the thickness of the
will be laid against the upper and, preferably,
sole varies without a substantial change in the
intensity of the pressure. The rigidity of the
as indicated in Fig. '7, the loops of needle thread
are not tightened sufficiently to draw the locking
work support, presser foot, needle and awl is so
much greater in a curved needle type of machine
threads beneath the outer surface of the upper.
than in a ‘straight needle machine that the prob 40 By so doing, the force of each needle thread loop
lem of maintaining a shoe in sewing position dur
in tightening a stitch is distributed along two
parallel lengths of locking thread extending be
ing sewing is not troublesome. As a further
tween the adjacent needle loops, and the parallel
means to prevent displacement of the upper or
upper and lining of a shoe in advance of the point
locking threads serve to ?ll out and support the
of operation in the machines of the patents above
upper when the shoe is turned inside out accord
identi?ed, they are provided with an upper guard
ing to the usual practice in the manufacture of
acting opposite the sewing point. Due to the
the turn shoe.
greater rigidity of the work clamping and pene
The locking thread supply case 22 is substantial
trating instruments in a curved needle machine,
ly the same as that disclosed in the patent to
successful sewing operations may be performed 5,1 Ashworth except that instead of having a single
without utilizing the equivalent of an upper guard so thread outlet in the circular side wall of the thread
in such machines.
case, as in the Ashworth machine, there are in
In order to facilitate removal of a sewed shoe
the present machine a pair of outlets one of which
and the presentation of an unsewed shoe at the
is indicated at ‘H3 in close proximity to each other.
end of a sewing operation in the machine dis
A pair of threads leave the outlets in parallel rel
closed herein, the presser foot is lifted from en
ation and are engaged by a tension spring 12
gagement with the shoe upper automatically in
of a construction similar to that in the Ashworth
the illustrated machine in the same manner as in
machine, the thread being led into the seam and
the machine of the Ashworth patent and at the
carried against the outer surface of the upper by
same time the horn is moved radially of the
successive loops of needle thread, as illustrated
needle path positively away from the shoe sole 60 in Figs. 5, 6 and 7.
through connections with the presser foot. These
The supplies‘ of locking thread are contained
connections comprise a set screw 58 mounted in
within the thread case 22 on a pair of similar bob
a pin 60 extending laterally from a lever 62 into
bins 14 and 76 rotatable upon a central split
a position close to the pivoted arm of the horn
stud 18 in the thread case. If both bobbins are
carrier 46. The lever 52 is fulcrumed on a stud 65 mounted upon the stud ‘I8 to turn in the same
64 in the machine frame and has an upwardly
direction while looking threads are being with
extending arm connected through a link 65 with a
drawn, one bobbin will always rotate faster than
downwardly extending arm of a presser foot
the
other unless the diameter of the thread supply
lever 63. During normal sewing operations, the
set screw 58 is out of engagement with the horn 70 on one bobbin is exactly the same as on the other.
If. one bobbin rotates faster than the other the
carrier 45 even at the time in each sewing cycle
tension on the corresponding locking thread
when the presser foot releases the clamping pres
will be greater than on the other due to the
frictional force exerted on the slower bobbin by
matically lifted from engagement with the shoe a 75 the faster bobbin and as a result the thread may
sure on the shoe for feeding movements.
At the
end of a seam, however, the presser foot is auto
21,410,859
I
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I
become slack and entangled in the thread case
TOY
shaped .horr'ii one arm of which is of greater
length than the depth of the largest sized shoe
and irregularities may be produced in the seam.
In order to insure uniform tension on both
from the ankle opening to the extremity of the
locking threads where two lengths are guided in
toe, arranged to extend through the'ankle'open-v
parallel relation toward that portion of the seam ‘ ing of the shoe and» to engage the shoe sole, ‘and
being led against the upper of a shoe in the
a U-shaped horn carrier one arm of which is
present machine, the bobbins ‘ill and ‘it are so
yieldingly connected to the machine ‘frame and
placed within the bobbin case that they will turn
the other arm of which supports the horn for
in opposite directions upon withdrawal of locking
swinging movement about an ' axis passing
thread, the frictional force between the bobbins 10 through the point of engagement of the-horn
always acting to balance the tensions between the
with the sole, the horn supporting arm of the
threads without reducing it on either.
carrier being of su?‘icient length to provide clear-'v
The nature and scope of the invention having
ance space for the heel end of ‘the largest sizedv
been set forth and a speci?c embodiment of the
shoe within the U of the carrier.
invention having been described, what is claimed
5. A machine for sewing the upper to the sole
1s:
of a shoe while unsupported on a last, havinga
1. A machine for sewing the upper to the sole
work support to engage a' stitch receiving chan
of a shoe while unsupported on a last, having a
nel formed in the sole, a presser foot acting to
relatively thin, wedge-shaped work support to
clamp and release the shoe on the work support,
engage'a stitch receiving channel in the sole, a 20.. and stitch forming devices including a curved
presser foot to clamp and release the shoe on the
needle acting ?rst to engage the upper and then
work support, and stitch forming devices includ
to enter and emerge from the same side of the
ing a curved work piercing awl arranged to en
sole, in combination with a horn extending
ter first the channel in the sole and then to
through the’ ankle opening of a shoe and acting
emerge from the same side of the sole, and a
against the inner surface of the shoe sole to press
curved hook needle acting to enter the perfora
the sole yieldingly into the space between the tion formed in the sole by the awl, in combina
work support and presser foot, a carrier on one
tion with a horn extending through the ankle
end of which the horn is supported for swinging
opening of the shoe and bearing against the inner
movement about an axis disposed radially of the’
surface of the sole and means acting on the 30 needle path, and a bearing adjustably mounted
horn to urge the sole throughout each sewing
on the horn supporting end of the carrier to
cycle yieldingly against the work support and
enable the point of engagement of the‘ horn and
toward the center of curvature of the awl and
the shoe sole to be brought into line with the
needle with a uniform pressure.
point of operation of the stitch forming devices.
2. A machine for sewing the upper to the sole
6. A machine for sewing the upper to the sole
of a shoe while unsupported on a last having, in
combination, a work support to engage a stitch
receiving channel in the sole, a presser foot to‘
clamp and release the shoe on the work support,
stitch forming devices‘ including a‘ curved hook
needle movable about an axis concentric with
the curvature of the needle, and a horn extend
ing through the ankle opening of the shoe and
bearing against the inner surface of the sole ad
jacent to the sewing point, said horn being ro
tatable about an axis extending substantially
through the sewing point and the axis of curva
ture of the needle.
3. A machine for sewing the upper to the sole
of a shoe while unsupported on a last, having a
work support to engage a stitch receiving chan
nel formed in the sole, a presser foot acting to
clamp and release the shoe on the work support,_
and stitch forming devices including a curved
needle acting ?rst to engage the upper and then
to enter and emerge from the same side of the‘
sole,‘ in combination with a horn extending
through the ankle opening of the shoe and acting
against the inner surface of the shoe sole to press
the sole yieldingly into the space between the ‘
work support and the presser foot, a carrier on
the upper at the edge of the sole to clamp and
which the horn is mounted for swinging move
ment about an axis disposed radially of the nee
dle path, and a spring actingr on the carrier to
press the sole yieldingly into the space between
the work support and the presser foot throughout
each sewing cycle.
release the shoe on the work support, and stitch
7. A machine for sewing the upper to the sole
of a turn shoe while unsupported on a last, hav
ing a work support to engage a stitch receiving
channel in the sole, a presser foot acting against
forming devices including a curved work pierc 55 of a shoe while unsupported on a last, having a
ing awl arranged to enter ?rst the channel in
work support to engage a stitch receiving chan
the sole and then to emerge from the same side
nel formed in the sole, a presser foot acting to
of the sole, and a curved hook needle acting to
clamp and release the shoe on the work support,
enter the perforation formed in the sole by the
and stitch forming devices including a curved
awl, in combination with a horn extending 60 needle acting ?rst to engage the upper and then
through the ankle opening of the shoe, a carrier
to enter and emerge from the same side of the
on which the horn is mounted for relative move
sole, in combination with a horn extending
ment, and a spring acting on the carrier to press
through the ankle opening of the shoe and act
the horn against the sole throughout each sew
ing against the inner surface of the shoe sole to
ing cycle toward the center of curvature of the 65 press the sole yieldingly into the space between
awl and needle with a uniform pressure.
the work support and the presser foot, a carrier
4. A machine for sewing the upper to the sole
on which the horn is mounted for swinging move
of a turn shoe while unsupported on a last, hav
ment about an axis disposed radially of the nee
ing a main frame, a work support on the frame
dle path, a spring acting on the carrier to press
to engage a stitch receiving channel formed in
the sole yieldingly into the space between the
the sole, a presser foot acting against the upper
work support and'the presser foot throughout
at the edge of the sole, and stitch forming devices
each sewing cycle, and a pivotal mounting» for
including a needle acting ?rst to engage the
the horn carrier on the machine frame extending
substantially parallel to the line of the seam be
upper and then to enter and emerge from the
same side of the sole, in combination with a U 75 ing inserted, about which the carrier swings to
2,410,859
11
enable the horn to move toward and from the sole.
8. A machine for sewing the upper to'thersole
of a shoe while unsupported on a last, having a
12:
in penetrating the work and to impart a feeding‘
movement to the work, a carrier block moving
with the awl while feeding the work, and a chuck
on the carrier block, in combination with a sec
work support to engage a stitch receiving channel
ond work support member secured adjustably in
formed in the sole, a pressure foot acting to clamp
said chuck for engaging the channel in the sole
and release the shoe on the work support, and
in advance of the point of operation of the awl
stitch forming devices including a curved needle
to open the channel in the sole during back feed
acting ?rst to engage the upper and then to enter
ing movements of the awl.
and emerge from the same side of the sole, ‘in
11. A machine for sewing with a lockstitch seam
combination with a horn extending through the 10
the upper to the sole of a turn shoe while unsup
ankle opening of the shoe and acting against the
ported on a last, having a work support to engage
inner surface of the shoe sole to press the sole
a stitch receiving channel formed in the sole, a
yieldingly into the space between the work sup
presser foot acting against the upper at the edge
port and the presser foot, a carrier on which the
horn is mounted for swinging movement about 15 of the sole, and stitch forming devices including
a curved hook needle and a loop taker, in com
an axis disposed radially of the needle path, a
bination with a locking thread supply case con
spring acting on the carrier to press the sole
structed with a pair of outlets in a side wall
yieldingly into the space between the work sup
thereof and arranged to guide two lengths of
port and the presser foot throughout each sewing
cycle, and mechanism for actuating the carrier 20 locking thread in parallel relation against the
upper at the edge of the sole.
at the end of a seam to move the horn away from
12. A machine for sewing with a lockstitch seam
the sole of the shoe.
the upper to the sole of a turn shoe while unsup
9. A machine for sewing an upper to the sole of
ported on a last, having a work support to engage
a shoe while unsupported on a last, having a work
support member to engage a sitch receiving 25 a stitch receiving channel formed in the sole,
a presser foot acting against the upper at the edge
channel in the sole, a presser foot acting to clamp
of the sole, and stitch forming devices including
and release the shoe on the work support, stitch
a curved hook needle and a loop taker, in com
forming devices including a, curved work piercing
bination with a locking thread supply case and
awl arranged to enter ?rst the channel in the
sole in penetrating the‘ work and to impart a 30 two rotating thread packages within the thread
case from which lengths of locking thread are
feeding movement to the work, and a carrier
block moving with the awl while feeding the work,
in combination with a second work support mem
ber secured to the carrier block for engaging the
led, said packages being arranged to rotate in
opposite directions during withdrawal of thread.
13. A lockstitch shoe sewing machine having
channel in the sole in advance of the point of 35 stitch forming devices including a curved hook
needle and a takeup, in combination with a lock
operation of the awl, to open the channel in the
ing thread supply case, a pair of reversely wound
sole for the awl.
thread supply bobbins supported in said case with
10. A machine forsewing an upper to the sole
their adjacent end surfaces in frictional contact,
of a shoe while unsupported on a last, having a
work support member to engage a stitch receiving 40 and a single tension spring on the case engaging
the two threads as they are‘drawn from the
channel in the sole, a presser foot acting to clamp
respective bobbins.
and release the shoe on the work support, stitch
forming devices including a curved work piercing
awl arranged to enter ?rst the channel in the sole
CORWIN W. BAKER.
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