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Jan.‘ 14, 1947.
1 c.
Filed June 4, 1942
3 Sheets-Sheet l
a‘. F.’ 6' ya rZ-k, INVENTOR.
Jan. 14, 1947..
Filed June 4, 1942!
3 Sheets-Sheet 2
I 1
Jan. 14, 1947.
Filed June 4, 1942
3 Sheets-Sheet ‘3
Patented Jan. 14, 1947
Charles F. Goforth, Wichita, Kans.
Application June 4, 1942, Serial No, @5383
1 Claim. (Cl. 112-—l184)
invention relates to sewing machine con
by a suitable belt not shown, moving over the
struction, an important object of the invention
being to provide a sewing machine including'an
oscillating member, GOhStILl?b?d to operate in a
pulley 8,mountedthereon.‘
Another object of the invention is to provide
an oscillating thread-engaging member having
oppositely disposed thread hoolgs, so arranged
that regardless‘ of the direction of ‘the “initial
crank arm l0’ mounted on one end of the ‘power
shaft, the crank arm being connected with the
linl; Ii’, that in turn connects with the-‘needle
bar l0 through the collar l2’ and stub‘ shaft 13'.
Qperating adjacent to the needle bar, is the
presserefoot bar I2. On the lower end of the
movement of the hand wheel of the sewing ma
chine by the operator, one of the thread hooks
will be in a position to pick up the loop in the
bar i2, is mounted the pres‘ser-foot l3 which co
operates with the feed mechanism of the ma
chine in moving the material being sewed,
thread, formed by the needle of the machine in
passing through the material being sewed, and
carry the loop to a position around the ‘bob-bin
thread, in forming a stitch, thereby eliminating
improperly formed stitches which usually occur
by starting the hand wheel in the wrong direc
the usual vertically movable needle bar Ill that
carries the needle H. ‘The power shaft 1 trans,
mits movement to the needle‘bar to, through the
horizontal plane and used in lieu of the usual
well known loop taker.
In the head 9 'of the sewing machine is located
through ‘the machine.' Operating between the
arms of the member I4’, is an eccentric 16', that
is secured to one end of the power shaft 1, where,
by rotary‘ movement of the power shaft 1 is con?
verted into‘reciprocatorymovement of the needle
With the foregoing and other objects in view
bar l0 ‘and take-up bar‘516. Secured'on the
which Will apnear as the dg$<=¥ipti0¥l proceeds,
shaft 1 is a sleeve !4 on one end of whichis
mounted a pinion I5, the opposite end of the
the invention consists of certain novel details of
construction and combinations of parts herein
after more fully described ‘and pointed out in the
claim, it being understood that changes may be
sleeve Hi carrying the disk 34 over which the
eccentric I 6, to be hereinafter more fully ‘de
scribed, operates.
‘ ‘
Adjustable bearings H and 18 extend into de
made in the construction and arrangement of
parts‘ without departing from the spirit of the
pressions formed in the hub l9 of the member A
20, so that the member 29 may be‘rotated freely
invention as claimed.
30 on the adjustable bearings. A gear indicated
Referring to the drawings;
Figure 1 is a longitudinal sectional View
at 2| is formed at one end of the‘ member 2|]
and meshes with the pinion I5, whereby rotary
through a sewing machine constructed in ac
movement of the power shaft 7 is transmitted
cordance with the invention.
to the member 28. Formed in the periphery of
Figure 2_ is a bottom plan view thereof.
Figure 3 is a sectional view taken on line
the member 20, is a cam groove 22 into which
the pin 23 extends/the pin 23 being carried at
3—3 of Figure 1.
Figure 4 is a sectional view taken on line 4-4
the upper end of the pivoted arm 24 which is
of Figure 1.
supported at a point substantially intermediate
its ends, by the mounting 2.5. The lower end‘ of
the‘arm 24 extends through an opening in the
supporting table 5, and terminates at ‘a point
below the table 5 as clearly ‘shown by Figure ‘1
of the drawings. Pivotally connected to the
Figure 5 is a bottom plan View of the oscil
fitting double hook member
Figure 6 is an elevational View of the oscil
lating member and bobbin case mounted thereon.
' Figure‘ 7 is a vertical sectional view through
the oscillating member and bobbin case.
lower end of the arm 24, is a rack bar ‘25 that
Figure 8 is‘ a view illustrating the initial posi- ‘
tion of the needle thread loop, with respect to
the bobbin thread.
Figure 9 is ‘an 'elevational view of the machine
engages the segmental gear 21. This segmental
gear'2l is secured to the tubular bearing mem
ber 29 that is secured to the shaft 30, the bear
lng member 29 being mounted in bearings seated
ence character 5 designates the support or table
of the sewing machine, indicated generally by the
in the bracket 28. The ‘shaft extends from the
center of the oscillating double-pointed 'hook
member 3! which operates in‘ a horizontal plane
directly under the ‘needle and presser~foot of
reference character 6.
the machine.
head cover plate.
Referring to the drawings in detail, the refer- .
The reference character ‘l designates the power
shaft of the sewing ‘machine which is operated
This double-pointed hook member 3! is of
a novel construction, and embodies ‘a disk-like
member formed of suitable sheet metal material,
the peripheral edge thereof being turned upward
ly and inwardly as clearly shown by Figure 5
One end of the bar 45 is forked at 45.’ and
accommodates the pin 46', whereby the bar 45'
is permitted to reciprocate under the table 5
of the drawings, providing a ?ange 32.
of the machine.
This feed bar 45 includes an arm 49 extending
A por
tion of the ?ange 32 is cut away providing spaced
hooks 33 at the ends thereof, the hooks 33 being
upwardly towards the presser-foot I3, the ser
rated end 55 thereof cooperating with the press
disposed in opposite directions with respect to
each other, providing thread hooks that are de
signed to hook into loops formed in the, thread,
er~foot i3 in feeding material through the ma
by the needle of the machine, in carrying the
chine is in operation and the shaft 43 is rotated
backwardly and forwardly substantially a quar
Thus it will be seen that when the ma
needle thread around the bobbin thread.
ter turn in each direction, the feed arm 49 is
The ?ange 32 rests in the annular groove 32',
operated to feed the material through the ma
formed in the periphery of the bobbin case 33'
chine. In order that the feed mechanism may
supporting the bobbin case on the hook member
3|. A ?ange 34' forms a part of the bobbin case 15 be adjusted, the lever 40' may be operated to
move the arm 38' to various positions within the
and has a cut-out portion 35’ through which
elongated opening of the right-angled end portion
the needle of the machine extends in forming the
of the arm 38, thereby adjusting the length of
stitch. In order that the bobbin case will be
throw of the arm 38’ with the result that the
held against rotary movement, a pin 35' is pro
vided and extends downwardly from the lower 20 sewing machine may be adjusted for making a
substantially long stitch as in basting. By mov
surface of the table 5, terminating at a point
ing lever 40’ to the limit of its upward movement
above the hook member 3|. It will of course
the feed is reversed, since the movement of the
be understood that the double-pointed hooks and
arm 38’, shifts the roller to the opposite end of
the operation of the same is such that regardless
the elongated opening, or to-the position as shown
‘of the direction of oscillation in which the
in dotted lines in Fig. 4 of the drawings, with
double-pointed hook is started, one of the hooks
the result that downward movement of arm ,36
will pick up the thread from the needle and
moves the arm 38’ downwardly instead of up
form the stitch. ‘
wardly, as would be the case when the roller
It might be further stated that the construc
38 is positioned in the opposite end of the elon
tion of the cam groove 22, causes a movement
‘of the pivoted arm 24 which in turn operates 30 gated opening.
The cover plate for the head of the sewing
the rack bar 25 to oscillate the double-pointed
machine, is indicated by the reference character
5|, and is formed with a notch 53 at one corner‘
hook member and cause the double-pointed hook
member to cease oscillation for a predetermined
period, prior to the starting movement of the 35 thereof, through which the top thread or thread
from the spool of the machine extends. The
member 3| in the reverse direction.
Mounted on the power shaft ‘l, to move there—
with, is an eccentric, which embodies a disk 34
cover plate 5| also provides a support for the top
thread-tensioning device which embodies a spring
plate 52 secured to the cover plate 5|, by means
and eccentric band 35, the band 35 being secured
to the upper end of the arm 35 mounted in one 40 of the set screw 54. Hook 55 forms a part of the
thread-tensioning device, under which the thread
end of the sewing machine. The arm 36 is
passes from the notch, the thread passing up
pivotally secured to the link 38, through the pin
wardly from the hook 55 and through the eye in
31, the link 38 having an elongated opening, as
the arm 55 which extends through an elongated
clearly shown by Figure 4. This link 38 is pivot
ally mounted on the shaft 39' secured Within 45 opening in the cover plate. This arm 56 is
formed with a pivoted end 56’ which is normally
‘the machine housing.
held in an extended position by the spring 51’
Mounted within the sewing machine, is an
arm 38’ on one end of which the roller- 39 is
mounted adjacent to the pivot point between the
mounted, the roller moving through the elon
gated opening, so that movement of the pivot
pivoted end and arm 56. This pivoted end moves
downwardly when the thread becomes excep
arm 36, results in a relative movement of the
tionally taut, thereby preventing breaking of the
arm 38'.
thread due to lack of resiliency at ‘the point of
Thus it will be seen, that due to this construc
tion, the position of the roller 39 within the
contact between the thread and arm. From the
arm 56, the thread passes downwardly to the
elongated opening, may be adjusted longitudi
nally thereof, to vary the throw of the arm 38’.
The adjustment of the arm 33' withrespect
to the link 38, is accomplished by the operation
of the lever 40', which is extended through an
‘opening in the sewing machine, there being pro
vided a link 4|’ connecting the lever 4|!’ with
the arm 38’ so that as the lever is swung on
its pivot, the roller 39 is moved longitudinally
of the link 38.
This arm 38' has connection with the arm
From the foregoing it will be seen that due to
the construction of the double-pointed hook 3|,
the hook will pick up the needle thread in form
ing the stitch, regardless of the direction of os
cillation in which the hook is started, thereby
insuring against an improperstitch. It will also
be seen that by adjusting the lever 40', the length
of the stitch may be regulated, to the end that
long stitches may be made, as in basting, and by
65 throwing the lever 40' from the top to the bottom
42 that in turn is secured on the shaft 43 mounted
under the sewing machine table.
This shaft 43 extends throughout the length
of the sewing machine, and carries the feed bar
operating mechanism 44 at one end thereof. 70
it reverses the feed and vice versa.
On forming a stitch, the threaded needle passes
downwardly through the material being sewed,
Mounted directly under the sewing machine, is
and through the cut-out portion in the ?ange of
the bobbincase, forming a loop A as shown‘by
Fig. 8 of the drawings. The hook at one end of
the feed bar 45 that has teeth 46 near the free
the cut-away portion of the member 3|, depend
end thereof, the teeth being adapted to cooperate
with the presser-foot, in feeding material being
sewed, under the needle.
ing on the direction of rotation of member 3|,
moves into the loop spreading the loop and, car
75 rying the thread at one side 7of the loop over the
beveled upper edge of the bobbin case, the thread
at the opposite side of the loop passing under the
lower edge of the bobbin case, the thread moving
through the space K between member 3| and bot
tom of the bobbin case, until the loop moves from
the position shown at C in Fig. 5 of the drawings,
to the position 9, whereupon the tensioning
nected with said shaft, underthread mechanism
supported by said body portion and including a
circular bobbin case having an annular groove
formed in the periphery thereof, a disk-like mem
ber disposed under the bobbin case, the edge of
the disk-like member being turned upwardly and
inwardly, providing a ?ange disposed within said
means or arm 56, operate-s to draw the thread
annular groove and connecting the disk-like
taut, causing the thread to slide over the edge
member and bobbin case, a portion of the edge of
of the bobbin case and loop around the bobbin 10 the disk-like member being cut away providing
thread B, forming the stitch. This operation is
hooks disposed in opposite directions, at the ends
repeated in forming a line of stitching as in
of the cut-away portion, means operative by said
shaft for oscillating the disk-like member where
What is claimed is:
by said hooks are alternately engageable with a
In a sewing machine, a body portion, a power 15 needle thread loop delivered below the bobbin
shaft within the body portion, a reciprocatory
case by said needle in forming a stitch.
needle Within the body portion operatively con
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