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Патент USA US3048141

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Aug. 7, 1962
3,048,133
1.. G. MILLER
NEEDLE cum: FOR SHOE SEWING MACHINES
Filed March 21, 1960
Inventor
Lloyd G Miller
By 722s Az‘z’orney
United States Patent O?lice
3,048,133
Patented Aug. 7, 1962
2
3,048,133
' 1,920,998 is subject to some ?exure during operation of the
machine axially of the supporting shaft so that the bene?t
1
NEEDLE GUiDE FOR SHGE SEWWG MACHENES
Lloyd G. Miller, Beverly, Mass., assignor to United Shoe
Machinery @Corporation, Flemington, M3,, 2: corpora
tion of New Jersey
Filed Mar. 21, 1960, Ser. No. 16,427
7 (liaims. (til. 112-65)
The present invention relates to improvements in Good
year inseam sewing machines of the type for attaching
of a rigid needle guide is not obtainable without unduly in
creasing the thickness of the needle guide along the
UK mounting shaft.
An object of the present invention is to improve the
construction and mode of operation of a needle guide in
a Goodyear shoe inseam sewing machine of the type
referred to in the patents above identi?ed in such man
ner that a more rigid construction is provided, resulting
welts to lasted shoe uppers and sole members, such as
in improved sewing operations with less needle breakage
disclosed in United States Letters Patent No. 1,920,998,
than has been possible heretofore. A further object is to
provide an improved rigid needle guide having a ball lock
actuating connection ‘with the needle segment, thus elimi
15 nating the necessity for a complete, separate cam actuat
granted August 8, 1933, on application of A. R. Merrill,
and more particularly to improvements in needle guides
‘for such machines.
,
A needle guide in a machine of the type referred to is
for the purpose of sti?fening an oscillating curved hook
nee le against de?ection or breakage as the result of
movement of the work engaged by the needle in a man
ing mechanism for the needle guide, as in the machine
of Patent No. 1,920,998.
The several features of the inventionare herein illus
trated ‘as embodied in a shoe sewing machine having a
ner to impart strain in the needle which, without the guide,
curved hook needle and other stitch forming devices, in
cluding means for supporting the needle for oscillation
would cause the needle to become damaged or misplaced
from such position as will enable it to perform its func~
about its center of curvature on a segment, in which the
eedle is clamped, the machine being equipped with a
tion properly in the machine. In the machine of the prior
needle guide having bearing surfaces on both sides of the
patent the needle guide moves with the needle until its
point penetrates the work and, thereafter, the guide re 25 needle segment to support the guide for relative move
mains stationary while the needle enters the work and re
tracts with a loop of sewing thread, the needle guide en
gaging the needle in close prorimity to its point of entry
into the work.
.
ment about the center of curvature in the needle.
As
iliustrated the needle segment has two‘ widely spaced co_
operating ‘bearing surfaces formed integrally therewith and
arranged to engage the bearing surfaces of the needle
guide, so that the axial length of the bearing surfaces for
the needle guide are extended further than heretofore,
To actuate the needle guide so that it moves in the de
sired manner and remains in close proximity to the work
with the result that a longer wearing, more rigid con
during the time of needle penetration, the needle is se
struction than in prior use is produced. To strengthen
cured in a segment and suitable connections are provided
the construction of the needle guide still further, a tu
for holding the guide stationary at the proper times. To
mount the needle segment and the needle guide for oscil 35 bular hub extends in opposite directions from a plane de
?ned by the curvature of the needle, the needle guide
lation in the patented machine, it has been common prac
straddling the needle segment rather than the reverse rela
tice to secure the needle guide to a shaft passing loosely
tion, as in Patent No. 1,920,998, and being rotatably sup
through the needle segment and extending in opposite
ported on the tubular hub at opposite sides of the needle
directions through bearings fixed in the frame of a ma
segment.v The construction thus outlined is particularly
chine, so that the shaft may reciprocate, the work being
advantageous when it is desired to ‘actuate the needle
fed by the needle while engaging the work. In addition,
guide through the use of a ball-lock connection acting
the shaft for supporting the needle may have rotatably
alternately between the needle segment and a relatively
mounted upon it a carrier for a channel guide, past the
nonrotatable member connected with the machine frame,
work engaging end of which the needle moves to support
the work against the thrust of the needle. In an attempt 45 as in the machine of Patent No. 2,041,945.
These and other features of the invention consist in the
to provide a rigid construction in the patented machine,
devices, combinations and arrangements of parts here
the needle guide is ?xed to the shaft on which the needle
inafter described and claimed, together with the advan
segment rotates and operates in a slot formed in the needle
tages to be obtained thereby, as will readily be under
segment, which straddles the needle segment. Such ar
rangements have been found to be effective and to produce 50 stood by those skilled in the art from the following de
vacceptable results.
To actuate the needle guide in the patented machine it
has'becn found necessary to provide cam driven mech
scription, taken in connection with the accompanyin
drawings, in which:
7
>
FIG. 1 is a view in front elevation of a portion of a
anism separate from the needle for rotating the needle 55 machine embodying the features of the present invention;
FIG. 2 is a perspective exploded view of theparts co
supporting shaft on which the needle guide is ?xed. In
operating to form a mounting for the needle and needle
United States Letters Patent No. 2,041,945, granted May
guide in the machine;
26, 1936, upon application of A. R. Merrill, however,
FIG. 3 is a detail front view, broken away and in sec~
connections are provided for actuating the needle guide di
tion, illustrating the assembly of the parts shown in
rectly from the needle segment by means of a ball lock
instead of utilizing a complete, separate cam mechanism 60 FIG. 2; and
FIG. 4 is a detail front view of the needle segment and
as in Patent No. 1,920,998. It is obviously impossible to
the needle guide with associated parts removed and
mount the needle guide in a slot of a needle segment as
broken away.
in the latter patent, while utilizing a simple ball-lock con
The machine illustrated in the drawings is adapted for
nection between the needle segment and needle guide as
65 ewing the upper and welt to the sole of a Goodyear welt
in Patent No. 2,041,945. This is because the ball lock
shoe with a chain stitch inseam and is provided with the
must be engageable alternately with the needle segment
usual stitch forming and work feeding devices comprising
and a non-rotating part connected with the machine
a curved hook needle 2, a looper ‘4, a thread ?nger 6 and
frame, in order to hold the needle guide stationary after
a channel guide 8. Except as hereinafter described, the
reaching a position close to the work being operated upon.
The straddling relation of the needle segment prevents 70 machine is substantially the same as that disclosed in
Patent No. 1,920,998.
such operation. Further than this, it has been found that
The machine is constructed with an enclosed frame
the needle guide of the machine disclosed in Patent No.
3,048,133
3
A
including removable cheek plates 10 and 12 at the lower
ends of which are formed bearings 14 and 16 (see FIG. 3).
In the bearings there are slidably and rotatably mounted
in stationary position while the needle engages the work
the ball 58 is shiftable in its perforation 56 into a recess
the ends of a needle supporting shaft 18 passing through‘
a needle carrying segment 20. The needle 2 is clamped
into the recess 62 is produced as a projection on the needle
guide engages a lug 63 on the flange of the sleeve 50 to
to the segment by a bolt 22in a manner substantially the
same as disclosed in Patent No. 2,041,945, except that
the bolt 22 has a nut 24 accessible on the left side of the‘
stop movement of the needle guide.
From the foregoing'it appears that a simple and rigid
needle guide construction is provided which may readily
62 in the ?ange of the sleeve 54]. Movement of the ball
needle segment. To stiffen the needle segment 20 in its
be disassembled and replaced in any one of its several
bearing on the shaft 18 so that as the segment swings 10 parts without necessitating more than a minor dismantling
about the shaft the needle will oscillate about its center
of the machine and that the rigidity of the needle guide, as
of curvature de?ned by the axis, indicated at 26, of the
the result of its straddling relationship with the needle
shaft 18, the needle segment has an integral tubular hub
segment and spaced bearing surfaces on the needle guide,
27 extending in opposite directions from a plane defined
produces a much stronger and effective stiffening action
by the needle curvature to cover a substantial proportion 15 on the needle. Consequently, with the present construc
of the shaft 18 along its axis.
tion needle breakage has been all but eliminated and such
In accordance with the present invention a novel needle
breakage as now occurs with the use of the subject guide
guide slidingly engages the needle and con?nes its move
is the result of engagement of the needle with foreign
ments with improved accuracy to oscillation about its
bodies found in shoe construction, such as staples, tacks,
center of curvature. The needle guide is composed of a 20 or toe lasting wires. Since the needle guide engages the
block 28 and plates 30‘ and 32 at either side of the needle
needle in proximity with the work at the point of needle
segment formed with recesses 34 and 36, within which the
entry, a matter of critical importance has been found to
guide block 28 is secured and with internal bearing sur
be sutlicient rigidity to avoid fiexure, especially against
faces 38 and 40 engaging external bearing surfaces 42 and
forces exerted in a direction parallel to the axis of the
44 on the tubular hub 27 at both sides of the segment 20.
needle supporting shaft 18. Thus, the rigidity of the
The side plates and needle guide block 28 are held together
needle guide and its ability to resist ?exure is of more im~
releasably by a single fastening screw 46 passing loosely
portance than that of the segment in which the needle is
through the needle guide plate 32 and the needle guide
clamped.
I
block 28 and into threaded engagement with the side plate
The nature and scope ‘of the invention having been
30. By this construction the needle guide is capable of 30 indicated and a particular embodiment having been
straddling the needle segment and is rotatably supported
described, what is claimed is:
out of engagement with the shaft 18 by bearing surfaces
1. A shoe sewing machine having a curved hook needle
on the hub of the needle guide, which surfaces are spaced
and other stitch forming and work feeding devices and a
along the axis of the shaft about which the needle oscil
shaft for rotatably supporting the needle for oscillation
lates. The needle guide also is readily assembled or dis 35 about its center of curvature including a segment in which
assembled from its position on the needlev segment merely
the needle is clamped, in combination with a needle guide
by removing the fastening screw 46.
having bearing surfaces on both sides of the needle seg
For actuating the needle and its segment the segment
ment to support the needle guide for oscillating movement
is pivotally connected with a link 48, as in the machine of
relative to the segment about the center of curvature for
Patent No. 1,920,998. To impart a feeding movement 40 the needle.
to the needle and the parts assembled therewith the left
2. A shoe-sewing machine having a curved hook needle
end of the shaft 18 has an enlarged head ?tting the bear
and other stitch forming and Work feeding devices and a
ing 14 of the cheek plate 10 and a diametrical slot in the
shaft for rotatably supporting the needle for oscillation
enlarged head into which enters the rounded forward end
about its center of curvature including a segment in which
of a feed lever 49 similar in construction and in mode
the needle is clamped, in combination with a needle guide
of operation to that of a machine disclosed in an applica
formed with two separate plates having bearing surfaces
tion for United States Letters Patent, Serial No. 840,148,
at either side of the needle segment to‘ support the needle
?led September 15, 1959 in the names of the present in
guide for movement relative to the segment about the
ventor and Robert W. Bradley jointly.
center of curvature for the needle, co-operating bearing
To prevent movement of the needle segment and the
surfaces formed integrally with the needle segment and
needle guide axially along the shaft 18, the ends of the
engaging the bearing surfaces on the needle guide and
hub 27 for the needle segment engage the enlarged head
means for releasably holding together the two bearing
on the end of the shaft 18 and a ?anged sleeve 50 sup
plates of the needle guide for assembly or disassembly.
ported by the shaft 18 and passing through an opening
3. A shoe sewing machine having a curved hook needle
in a carrier 52 for the thread ?nger 6 and the channel 55 and other stitch forming and work feeding devices, and a
guide 8. The sleeve is rotatably supported on the shaft
shaft for supporting the needle for oscillation about its
18 and the carrier is held from rotation by mechanism
center of curvature including a segment, in which the
for actuating the thread ?nger. The sleeve 50‘ is secured v
needle is clamped and a tubular hub integral with the
to the carrier 52 by a screw 54 passing through the ?ange
needle segment and extending in opposite directions from
of the sleeve 5% into threaded relation with the carrier. 60 a plane de?ned by the needle curvature, in combination
To actuate the needle guide a direct ball-lock connec
with a needle guide formed with separate plates straddling
tion ‘between the needle guide and the needle segment is
the needle segment and being rotatably supported on the
provided as disclosed in Patent No. 2,041,945. The rigid
tubular hub at opposite sides thereof and a single screw
ity of construction is preserved and the ease of assembly
for
securing the plates together.
and disassembly of the needle guide parts are afforded 65
4. A shoe sewing machine having a curved hook needle
by providing the side plate 30 with a perforation 56 at
and other stitch forming and work feeding devices, and
one side of the needle segment in which perforation is
means for supporting the needle for oscillation about its
slidably mounted a ball 58. The ball is capable of en
center of curvature including a segment, in which the
gagement with either the needle segment 20 or the ?ange
of the sleeve 50, ‘between which the side plate 30 is con 70 needle is clamped and a tubular hub integral with the
needle segment and extending in opposite directions from
?ned. The right end of the tubular hub 27 on the needle
a plane de?ned by the needle curvature, in combination
segment also extends to the surface of the ?ange on the
with a needle guide block, and bearing members for the
sleeve ‘50. To move the needle guide with the needle, the
ball 58 is engageable with a recess 60 in the adjacent sur
needle guide surrounding the tubular hub at either side of
face of the needle segment 20 and to hold the needle guide 75 the needle segment, at least one of said bearing members
8,048,133
5
6
being separable from the other to enable rassemblsr of the
needle guide with the segment.
?anged sleeve secured to the thread ?nger carrier, ‘and
connections for actuating the needle guide including a ball
5. A shoe sewing machine having a curved hook needle
and other stitch forming and work feeding devices, and
lock at one side of the needle segment, the ball of which
is slidably mounted in the needle segment for alternate
engagement with either the needle segment or the ?ange
of the sleeve secured to the thread ?nger carrier.
7. A shoe sewing machine having a main frame, a
curved hook needle and other stitch forming ‘and work
feeding devices, a shaft for supporting the needle for
means for supporting the needle for oscillation about its
center of curvature including a segment, in which the
needle is clamped and a tubular hub integral with the
needle segment ‘and extending in opposite directions from
a plane de?ned by the needle curvature, in combination
with a needle guide block slidingly engaging the needle, 10 oscillation about its center of curvature including a seg
and plates at either side of the needle segment formed with
ment formed with an integral tubular hub extending from
recesses within which the needle guide block is secured and
both sides thereof and surrounding the supporting shaft,
with bearing surfaces engaging the tubular hub for the
in which segment the needle is clamped in combination
needle segment at both sides thereof.
with a needle guide straddling the needle segment and
6. A shoe sewing machine having ‘a main frame, a
having bearing surfaces engaging the tubular hub of the
curved hook needle, a thread ?nger and other stitch form
needle segment out of engagement with the shaft.
ing and Work feeding devices, means for supporting the
needle for oscillation about its center of curvature includ
ing a segment formed with a tubular hub extending from
both sides, in which segment the needle is clamped, a
shaft passing through the tubular hub of the needle seg
ment and into bearings in the ‘frame to support the needle
segment, in combination with a needle guide straddling the
needle segment, and being rotatably supported on the
tubular hub at opposite sides thereof, a carrier for the 25
thread ?nger rotatably mounted on the needle shaft, a
2.)
References Cited in the ?le of this patent
UNITED STATES PATENTS
551,987
1,465,704
1,617,338
1,920,998
2,041,945
Mills ______________ __ Dec. 24,
Wood ______________ __ Aug. 21,
Leveque _____________ __ Feb. 15,
Morrill ______________ __ Aug. 8,
Morrill ______________ __ May 26,
1895
1923
1927
1933
1936
2,224,768
Haas ________________ __ Dec. 10, 1940
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