IMPROVE- MENTS IN LOCK-STITCH SEWING MACHINES
Year: 1884

page_text: I, DANIEL JONES, of 27, Great Frederick Street, Cardiff, in the County of
Glamorgan, Builder, do hereby declare the nature of said invention, for "IMPROVE-
MENTS IN LOCK-STITCH SEWING MACHINES," to be as follows:-
This invention relates to lock-stitch sewing machines of the kind described in
the provisional Specification of my application for Letters patent dated the sixth
day of October 1884 and numbered 13233, that is to say, wherein two reels are
employed instead of a reel and a spool or bobbin.
The carrier in which is enclosed the reel on which is the under or second thread
is caused to rotate by a lever or crank one end of which takes into a recess formed
for its reception on the carrier and the other end of which is secured to the driving
shaft. Accordingly, as the driving shaft is rotated, rotatory motion is imparted to
the reel carrier through the medium of the said lever or crank. Tho reel carrier is
supported on a circular bearing secured to the bed plate.
Upon the carrier is formed a hook which takes into each loop of the upper
thread in turn as it is formed in the motion of the needle. The carrier passes in
its rotation through the loop which, being engaged as aforesaid with the hook
formed on the carrier, is widened as the carrier rotates. The under thread is
embraced by the loop, and when the hook of the carrier re-approaches the needle
the loop becomes engaged with a wire attached to the lever or crank aforesaid and
is thereby drawn aside clear of the hook which now takes into a fresh loop formed
by the needle as ordinarily-By the continued rotation of the carrier the first loop
becomes tightened and a locked stitch is completed in the material being sewu.
A flange or shoulder may be formed on the face of the carrier to prevent the top
thread of a loop from slipping until a desired point in the rotation of the carrier is
arrived at.
D1: 1941 days of December 1881
W. LLOYD WISE,
Applicant's Agent.

page_text: Er
I, DANIEL JONES, of 27, Great Frederick Street, Cardiff, in the County of
Glamorgan, Builder, do hereby declare the nature of my said invention for
IMPROVEMENTS IN LOCK-STITCH SEWING MACHINES," and in what manner tho
same is to be performed, to be particularly described and ascertained in and
by the following statement :-
My said invention relates to lock stitch sewing machines of the kind which
forms the subject of a former application made by me for Letters Patent, dated
October the 6th, 1884, No 13233, that is to say, wherein a reel is employed as well
for the second or under thread as for the upper thread.
According to this invention the carrier or container in which is contained the
reel on which the second or under thread is wound is caused to rotate. The
bearing in which it rotates is fixed. Rotary motion of the carrier is effected
through the medium of a lever or levers connected at one end to the driving shaft
and bearing at the other upon the back of the carrier. Upon the carrier is formed
a hook or notch which engages with each loop of the upper thread in turn as the
loops are produced by the vertical movements of the needle.
The carrier in rotating is thus passed through each loop of the upper thread, the
loop being widened as the carrier rotates.
The under thread is embraced by each loop, and each loop is drawn up to form a
stitch in the material being sewn as the loop next produced at the needle is
engaged with the book of the carrier.
A wire may be attached to the lever or levers by which the carrier is caused to
rotate for the purpose of drawing aside the thread of one loop as the hook of the
carrier re-approaches the needle to engage with a fresh loop.
Other devices may be employed for this purpose.
Referring to the accompanying sheet of illustrative drawings, Fig. 1 represents,
partly in vertical section and partly in side elevation, a part of a sewing machine
arranged as for operation in accordance with my said invention. Fig. 2 is a partial
plan, and Fig. 3 a partial end view. Figs. 4 and 5 represent, respectively, a
vertical section and an end view of a modified form of carrier for the reel b of the
second or under thread.
The reel carrier a is supported in a fixed bearing i secured to the bracket I
depending downwards from the underside of the bed plate h. By means of the
forked lever or claw d, pivotted at a to the driving shaft e and impinging upon the
back of the real carrier a, the carrier is caused to rotate, the rotary motion being
transmitted from the driving wheel.
On the carrier a is formed the hook or notch A which engages with each loop of
the upper thread as it is formed by the vertical movements of the needle N. In
its rotation the carrier a is passed through each loop, the loops being widened as
the carrier rotates. .
The forked lever d bears at the back against the face of the cam g fixed to the
bearing which supports the driving shaft e.
The lever is rocked by the said cain g on the pivot d' so that each extremity of
the claw at the front is in turn and at the proper time raised from contact with
the back of the carrier a, and thus the thread of the loops is allowed to pass under

page_text: the front extremity of each member of the claw while the carrier continues to be
rotated by the other member.
The under thread is embraced by each loop of the upper thread, as is well
understood, and each loop is drawn up to form a lock stitch in the material being
sewn as the hook A engages with the loop next produced at the needlo N. As the
hook re-approaches the needle after having engaged with a loop and carried it
around the carrier, the thread of the slack loop is drawn aside by a wire attached
to the lever d. Other devices may be employed for this purpose.
By using a reel carrier of the form shown at Fig. 5, wires may be dispensed
with. The conically shaped body a² of this carrier is provided with a groove a
extending in a spiral manner around it. The thread enters the groove as the
carrier rotates, and when the hook A re-approaches the needle the thread is
loosely thrown off and is then drawn up to form the stitches as hereinbefore
described.
The reel b contained in tho carrier a fits loosely over the tube o made in one
piece with or rigidly secured to the barrel m which encloses the reel. The reel is
maintained in place by the nut t fitting on the outer end of the spindle s fixed to
or made in one piece with the carrier a. The barrel m is kept stationary by the
arm n fixed to the bed plate h and bearing against the limb n¹ of the barrel at or
near the tension p through which the second or under thread is passed.
At Fig. 6 is shown a modification in form and arrangement of the mechanism
whereby rotary motion is transmitted to the carrier.
The claws d, d are pivotted at d² to the holder d³, a detached view of which is
shown at Fig. 7. Fig. 8 represents an end view of the cam 9 whereby the
claws d, d' are caused to rock. The holder d³ is fixed to the driving shaft e.
A spring H secured to the shaft e tends to raise the claws d d' from contact with
the carrier a. The cam operates to restore contact. Thus the thread, as the
carrier passes through the loops thereof, is permitted to pass around the carrier
without necessitating arrest of the notion of the carrier.
Instead of being arranged to have notion about a horizontal axis, the reel
carrier a inay be adapted to have motion about a vertical axis or about an axis
inclined at any angle to the plane of travel of the needle.
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
1st In a lock stitch sewing machine, the use of a carrier such as a for containing
the reel of the second or under thread and having rotary motion continuously in
one direction and being furnished with a hook or notch whereby cach loop of the
upper thread is in turn engaged and caused to pass around the said carrier to form
the stitches, substantially as herein-above described.
2nd In a lock stitch sewing machine, the combination with a carrier such as a,
furnished with a hook or notch whoreby each loop of the upper thread is in turn
passed around the said carrier, of means substantially as described for imparting
rotary motion, continuously in one direction, to the carrier for the purposes set
forth.