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 :—
Under this invention, which relates to that kind of sewing machine described in
the Provisional Specification left with a former application made by me for Lettors
Patent, dated the 6th day of October 1884, and numbered 13,233, that is to say,
wherein a reel is employed as well for the under thread as for the upper thread, the
carrier, which encloses the reel of the under thread, is furnished with two hooks,
one situated at a point opposite to the other. By means of a forked lever the
members of which bear upon the carrier the latter is caused, through suitable
driving gear, to partially rotate alternately in contrary directions. In each partial
rotation of the carrier a hook engages with a loop formed in the upper thread by
the travel of the needle. Each hook passes free of the slack thread of the loops,
the slack thread being drawn aside by a wire which is attached to the forked lever
aforesaid or is otherwise conveniently situated. The loops are widened in turn in
the motion of the carrier and embrace the under thread to form the lock stitches,
and each hook in turn draws tight the slack of the loop engaged by the other.
Dated this 12th day of December 1884.
W. LLOYD WISE,
Applicant's Agent.

page_text: "
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 the
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 the 6th
day of October, 1884, and numbered 13233; that is to say, wherein an ordinary
reel is employed as well for the second or under thread as for the upper thread.
The carrier containing the reel on which is wound the second or under thread is
furnished with two hooks and is caused to oscillate or partially rotate alternately
in opposite directions in fixed bearings. As each hook is presented to the needle,
it the hook-engages with a loop of the upper thread. The loops are formed as
usual in the vertical movements of the needle and they are widened as the carrier
travels. The under thread is embraced by the loops, and each hook of the carrier
in turn draws up the slack thread of the loop previously widened.
Referring to the accompanying sheet of 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 part plan. Fig. 3 represents an end view. Fig. 4 represents a back
view of the carrier a, designed to contain the reel on which the second or under
thread is wound, and shows the levers d by means of which motion is imparted to
the carrier. Fig. 5 is a front view of the carrier.
The carrier a which is furnished with two hooks is caused to oscillate or partially
rotate alternately in opposite directions in the fixed bearings i secured to or formed
in one piece with the bed plate h. The necessary oscillating notion, imparted to
the carrier a through the medium of the forked lever d, is obtained by the use of
an eccentric or other device employed to actuate the driving shaft e accordingly,
and such device is arranged so to operate that the carrier a moves from one limit
of its range of travel to the other while the needle N accomplishes a descent and
an ascent,
Whilst the carrier moves from one limit of its travel to the other, a hook thereof
engages at the needle with a loop of the upper thread. The loop is widened as the
carrier moves away therewith from the needle. Each hook engages in turn with
a different loop and each draws up the slack thread of the loop previously widened.
The loops embrace the under thread to form the locked stitches in the material
being sewn, as is well understood.
Instead of being arranged to have motion about a horizontal axis, the recl
carrier a may be adapted to have motion about a vertical axis, or about an axis
inclined at any angle with the plane of travel of the needle.

page_text: 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 or container such as a
to contain the reel of the second or under thread, the said carrier having motion in
a rotary sense alternately in opposite directions and being furnished with hooks or
notches whereby each loop of the upper thread is in turn caused to pass around the
Enid carrier to form the stitches, substantially as hereinbefore described.
2nd In a lock stitch sewing machine, the combination of a carrier such as a,
having hooks whereby each loop of the upper thread is in turn passed around the
said carrier, and means for imparting motion in a rotary sense to the said carrior
alternately in opposite directions, substantially as hereinbefore set forth.
Dated this 11th day of September 10.
W. LLOYD WISE.
Per F. J. Brougham,
46, Lincoln's Inn Fields, London, W.C.,
Applicant's Agent.