Improvements in Lock-stitch Sewing Machines.
Year: 1889

page_text: Date of Application, 1st June, 1889
Complete Specification Left, 1st Mar., 1890-Accepted, 19th Apr., 1890
PROVISIONAL SPECIFICATION.
Improvements in Lock-stitch Sewing Machines.
I, DANIEL JONES, of 27; Great Frederick Street, Cardiff, in the County of
Glamorgan, Mechanician, do hereby declare the nature of this invention to be as
follows
7
My invention has reference to two reel lock-stitch sewing machines.
In such a machine according to this invention a rotary looper comprising a
peculiarly formed hook at the rear and a nose or guard in front is used in conjunction
with a
take-up" in such a manner that when a loop has been carried by the hook
partly around the reel carrier or container a part of the loop will be taken up by the
take-up so that the loop will clear the hook and the rest of such loop will be sub-
sequently taken up by the action of the hook during the formation of the succeeding
loop and so on; thus obviating the friction of the thread upon the looper that obtains
in other lock-stitch sewing machines. The hook is formed inward at the rear of the
looper; it points in the direction of rotation; and is so shaped that after engaging
with a loop it will in its progress spread out such loop.
The nose or guard serves to prevent the hook re-engaging the lower portion of a
loop that has been carr.ed partly around the carrier and released.
The lower reel is placed in a carrier of cup-shape that is freely supported in a holder
in such a manner that loops of thread can pass around the carrier between it and the
holder as well understood. The holder is carried by an arm articulated to a bracket
or part of the machine so that it can be turned into a position in which the reel carrier
can be readily placed in or removed from the holder and a catch is provided for
keeping the reel carrier in its holder. A second catch is so arranged that when the
holder is in position for use with the first mentioned catch in place over the reel
carrier the second catch will serve to lock both the holder and the catch that keeps
the carrier therein.
1000
COOK
VOLE
Lurg jo Lup aste sun paira
DANIEL JONES.
COMPLETE SPECIFICATION.
Improvements in Lock-stitch Sewing Machines.
I, DANIEL JONES of 27 Great Frederick Street, Cardiff, in the County of
Glamorgan, Mechanician, do hereby declare the nature of this invention and in what
manner the same is to be performed to be particularly described and ascertained
in and by the following statement:-
My invention has reference to two-reel lock-stitch sewing machines.
In such a machine according to this invention a rotary looper comprising a
peculiarly formed hook at the rear, and a nose or guard in front, is used in conjunction
with a "take-up" in such a manner that when a loop has been carried by the hook
partly around the reel carrier or container, a part of the loop will be taken up by the
take-up so that the loop will clear the hook, and the rest of such loop will be sub-
sequently taken up by the action of the hook during the formation of the succeeding
loop and so on; thus obviating the friction of the thread upon the looper that obtains
in other lock-stitch sewing machines. The hook is formed inward at the rear of the
looper; it points in the direction of rotation; and is so shaped that after engaging
with a loop it will, in its progress, spread out such loop. The nose or guard serves to
prevent the book re-engaging the lower portion of a loop that has been carried partly
around the carrier and released.

page_text: The lower reel is placed in a carrier of cup-shape that is freely supported in a
holder, in such a manner that loops of thread can pass around the carrier between it
and the holder as well understood. The holder is carried by an arm articulated to a
bracket or part of the machine so that it can be turned into a position in which the
reel carrier can be readily placed in or removed from the holder, and a catch is pro-
vided for keeping the reel carrier in its holder. A second catch is so arranged that
when the holder is in position for use with the first mentioned catch in place over the
reel carrier, the second catch will serve to lock both the holuer and the catch that
keeps the carrier therein.
Fig. 1 shews in side elevation with parts in section, so much of a two-reel lock
stitch sewing machine as is necessary to illustrate the application of my invention.
Fig. 2 is an elevation of that end of the machine shewn to the left in Fig. 1 with
the front cover removed.
Fig. 3 is an end view of the looper shewing in full lines the position the looper
occupies when passing a loop on to the reel carrier or container, and indicates the
corresponding position of the needle end; the dotted lines shew approximately the
position of the looper and needle, whilst a loop of thread is being disengaged from
the hook of the looper.
Fig. 4 is a side view corresponding to Fig. 3.
Fig. 5 is an end view of the looper in the position it occupies whilst entering
a loop.
Fig. 6 is a side elevation corresponding to Fig. 5.
i
Fig. 7 is a view of the looper alone, corresponding to Fig. 5 but omitting that part
shewn below the dotted linea in Fig. 8.
Fig. 8 is a development of the looper except that the rearward hook is represented
as turned inward so as to point, as it does in the actual looper, in the direction of
rotation.
Fig. 9 is an elevation of the reel carrier.
Fig. 10 is a plan of the same.
Fig. 11 shews in plan the reel carrier with its holder and the means for carrying
and holding the same in position.
Fig. 12 is a side elevation of the parts illustrated in Fig. 11 but shewn turned into
positions to admit of the reel carrier (not shown) being readily placed in or removed
from the holder.
Figs. 13 to 22 inclusive are diagrammatic figures hereinafter described, illustrating
the formation of a loop and stitch.
Figs. 3 to 12 inclusive are drawn to a larger scale than the remaining figures.
1 is the main driving shaft mounted in bracket bearings, 2, 3 below the bed-
plate 4. is an arm clamped to the end of the driving shaft 1. To this arm
my improved looper is secured as clarly illustrated in Figs. 3 to 6 inclusive.
This looper comprises a peculiarly formed hook 6 at the rear, and a nose or
guard in front. As will be seen the hook 6 is formed inward at the rear of
the looper and points in the direction of rotation. The office of this hook is to
engage with a loop presented by the needle and to carry it down and partly
around the carrier 8 and then on arriving at or approximately at the position indicated
in dotted lines in Figs. 3 and 4 to release the loop which is then partly gathered up
by the take-up 9 whilst a fresh loop is being presented preparatory to being engaged
by the hook 6. On engaging with a newly formed loop the hook 6, as it proceeds to
draw out that loop and carry it around the carrier 8 will in so doing take up so much
of the previously formed loop as was not gathered by the take-up. The office of the
guard 7 is to prevent the hook re-engaging the portion of a loop that has been carried
partly around the carrier and released.
It will be understood that approximately half of each loop formed around the
carrier is formed from that part of the preceding loop that was not taken up by the
take-up.
The take-up 9 is a lever pivotted at 11 and provided with a pin 11ª that takes into a

page_text: cam groove 12 in a crank disc 13 that is secured to the needle driving shaft 14 and
also serves to reciprocate the needle bar and the needle 14*. By this arrangement the
take-up is driven positively.
The take-up and the looper may be so relatively arranged and operated that the
outer end 9 of the take-up, through which the sewing thread passes, will descend
and leave the part of the thread between this outer end 9 and the eye of the needle
slack when the needle descends to form a loop. This end of the take-up will then
remain nearly stationary whilst the hook 6 engages the loop and is carrying the same
around the carrier sufficiently far to take up so much of the previously formed loop
as was not gathered by the take-up 9, and also during a further small part of a revo-
lution of the looper, during which time the hook will draw from the reel 10 sufficient
thread to form a stitch. The end 9ª of the take-up then descends and supplies the
length of thread it previously gathered up and thus enables the hook 6 to pass the
loop of thread held thereby around the reel carrier. When the looper arrives in.
the position shewn approximately in dotted lines in Figs. 3 and 4, the outer end 9ª of
the take-up rises quicker than the hook and draws the loop off the hook 6 and partly
gathers up the same. As the looper continues to revolve the guard 7 comes in contact
with the portion of the loop not taken up by the previous upward motion of the
take-up and holds it out of the path of the hook 6 which will enter a fresh loop
presented by the needle, when the above described operations will be repeated. It is
however advantageous to so operate the take-up by a suitable formation of the cam
groove 12, that whilst the hook 6 is drawing, up that part of the previously formed
loop not gathered up by the take-up, the take-up instead of remaining stationary will
be descending so that the part of the loop which it previously gathered up will be
free to be drawn up by the hook. By this arrangement when the hook is passing
loop around the reel carrier the thread will not slide on the hook and friction between
the thread and hook will consequently be avoided.
al
This method of forming a loop and stitch is shewn diagrammatically in Figs. 13
to 22 inclusive.
In Figs. 13 and 14 which are views at right angles to one another illustrating the
looper and reel carrier and parts of the needle and take-up, the hook of the looper is
shewn engaged with a loop of thread from, the needle that has been spread out by
being drawn into the grooved part or neck of the hook. Figs. 15 and 16 are similar
views to Figs. 13 and 14 indicating approximately the relative positions the parts
occupy after, by a partial rotation of the looper, the loop has been drawn out further.
Figs. 17 and 18 are like views indicating approximately the positions the parts occupy
just before the loop is caused to pass the widest part of the reel carrier; when it has
passed that part the take-up ascends and draws up a portion of the thread. Figs. 19
and 20 shew approximately the position of the parts when the take-up has drawn up
a portion of the loop. As the looper continues its rotation the take-up continues its,
ascent until the loop is disengaged from the looper and about one half of the loop is
drawn up. Figs. 21 and 22 shew the same positions of the parts as Figs. 13 and 14
but the looper is supposed to have. made a complete rotation and to have drawn out
and passed around the lower thread the loop whose formation has been described
and which having been partly drawn up by the take-up as already stated is indicated
as having been still further taken up by the looper hook which will complete the
taking up and the tightening of the stitch in the course of its continued rotation.
The cup shaped carrier & illustrated in Figs. 9 and 10 is of known construction
being similar to that described in the specification of my previous British patent
No. 3428 of 1885 and is freely supported in a holder 15 in such a manner that loops
of thread can pass around the carrier between it and the holder as well understood.
This holder 15, is according to my present invention, carried by an arm 16 pivotted
or articulated at 16" to a bracket 17 so that it can be moved from the position it
occupies when the machine is in use and shewn in Figs. 1, 2, and 11 to that shewn
in Fig. 12 in which the reel carrier can be readily placed in or removed from the
holder.
18 is a catch for keeping the reel carrier 8 in position within its holder. This

page_text: catch, which is pivotted at 18* to the arm 16, is formed with a notch 19 adapted to
receive a projecting part 2 of the carrier to prevent the same rotating, and with
projecting ears 21 that serve to confine the carrier within its holder. These ears 21
are arranged a short distance above the top edge of the reel carrier so that loops of
thread can pass freely between them and the reel carrier. 22 is a second catch so
pivotted to the bracket 17, that when the catch 18 has been turned into position over
the reel carrier, and the arm 16 and holder are in positions for use as shewn in
Figs. 1, 2 and 11 it can be turned into the position shewn in these figures in which it
will lock both the catch 18 and the arm 16 in place.
The machine is provided with a tension device 23 of suitable construction and with
feeding mechanism not shewn, that may be operated from a cam 24 and which may
also be of any suitable construction as well understood.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what
I claim is
1. In a two-reel lock-stitch sewing machine in which there is a carrier below the
bed plate of the machine to contain a reel of thread, a rotary looper having at its
rearward part a hook formed inward and so as to point in the direction of rotation of
the looper, and a guard adapted to prevent the said hook re-engaging a loop that has
been carried partly around the real carrier and released.
2. In a two-reel lock-stitch sewing machine the combination of a looper such as
referred to in the preceding claim, a take-up and mechanism for actuating them the
arrangement being such that when a loop has been carried by the hook of the looper
partly around the reel carrier, the take-up will be caused to take up a part of such
loop and disengage it from the looper hook which will take up the remainder of the
loop during the formation of another loop as set forth.
3: In a two-reel lock-stitch sewing machine, the combination and arrangement of a
looper such as referred to in claim 1, a take-up and mechanism for actuating them in
such a manner that when a loop has been drawn out and carried partly around the
reel carrier by the looper,
(a), The take-up will be caused to take up a part of such loop and disengage it
from the looper,
(b), The looper whilst drawing out and carrying partly around the reel carrier
the succeeding loop, will take up not only that part of the first mentioned loop
that was not taken up by the take-up, but also the portion that was so taken
up, and
(c), To enable this to be done, the take-up will be caused to descend as set forth.
4. In a two-reel lock-stitch sewing machine a holder adapted to contain a reel
carrier freely suspended therein, a pivotted arm 16 to which the holder is secured and
which is provided with a catch 18 to prevent rotation of the reel carrier and retain it
within the holder and a second catch 22 for locking the arm, attached holder and
first mentioned catch in position for use, the arrangement being such that the holder
can be turned into a position in which the reel-carrier can be readily placed in or
removed from the holder substantially as herein before described with reference to and
shewn in the drawings annexed.
5. My improved two-reel lock-stitch sewing machine substantially as described and
shown.
D L
1
1
T
1000
W. Lloyd Wise,
DANIEL JONES.
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicant.