Improvements in Sewing Machines.
Year: 1889

page_text: Date of Application, 4th Oct., 1889
Complete Specification Left, 6th May, 1890-Accepted, 7th June, 1890
PROVISIONAL SPECIFICATION.
Improvements in Sewing Machines.
I, WILLIAM JONES, Director of the firm Jones & Co., Limited, of Guide Bridge,
near Manchester, in the County of Lancaster, Sewing Machine Manufacturers do
hereby declare the nature of the said invention to be as follows:-
My invention relates to improved combinations and arrangements of mechanism of
the rotary hook class of sewing machines.
There is the ordinary rotary horizontal shaft in bearings on the arm. of the
machine; having the fly and driving wheel at the rear and which can be made fast
to or loose from the shaft by a screw nut on the rear end of the shaft.
On the front end of the shaft there is a disc having a crank pin which gives motion
to the needle slide bar by a connecting rod between the two.
The rear of the disc forms a cam to actuate a bell crank lever having its fulcrum
on a stud or screw in the arm the end of which bell crank lever carries a small
pulley for the needle thread to pass through, this bell crank lever taking up and
giving out the needle thread to the rotary hook.
it
The needle thread comes from a spool on a pin or stud in the top of the arm,
then passes to a pinching arrangement formed by the head of a stud in the front
cover plate of the needle slide, and a tubular part sliding on the stud acted upon by
a spring which forces the tubular part towards the head of the stud and pinches the
thread slightly when passing between the two.
'
The needle thread then passes to an ordinary tension pulley arrangement on a
stud in the front plate, the tension pulley being acted upon by a spring and
adjusting screw.
/ ...
From the tension pulley the needle thread passes to an arrangement on the front
plate carrying a weak spring through the end of which the needle thread passes, and
then goes to the small pulley in the before mentioned bell crank lever, and from
this lever to an ordinary wire catch or loop on the lower end of the needle slide bar
and then to the eye of the needle.
There is an arrangement of slide bar for the presser foot lifted and lowered in an
ordinary way by a lever having its fulcrum on the arm.
2
i
There is a horizontal rotary shaft in bearings under the cloth plate and on the rear
end of this shaft there is a disc with a crank pin in it, to which one end of a short
link is jointed which is also jointed at its other end to the lower end of a connecting
rod lever, the upper end of which is jointed with the journal part of a crank in the
upper shaft in the arm.
:
The connecting rod lever is slotted in its lengthway for a block upon which it
slides to and fro which block has a hole in it to oscillate upon
the arm.
a pin in
i
The connecting rod lever thus slides up and down and oscillates to and fro.
On the front end of the shaft under the cloth plate is an ordinary or well
knowa arrangement of rotary hook, with the spool case arranged to be held from
rotating.
The feeding surface is on the upper face of an arm jointed to two arms on an
oscillating shaft in centre bearings in the framing under the cloth plate, this shaft
extending from the front to the rear of the machine.
. The feeding arm receives up and down movement from a cam, behind the rotary
hook, and the feeding movements from an excentric near the crank on the
upper
rotary shaft.
This excentric works in a. fork and oscillates one end of a lever (hereinafter
called the feeding lever) which at its lower end is jointed to an arm upon the, said
Oscillating shaft
.
.

page_text: There is a stud in the side of the feeding lever having a bowl upon it which can
work in a slot in a disc or part. on a short shaft having bearings in the end
frame, a little below the rear bearing in the arm of the frame for the upper rotary
shaft.
The outer end of the short shaft has a lever handle secured upon it, for oscillating
the short shaft which has sufficient friction put upon it to prevent it from moving too
easily.
The above described arrangement produces a reversible feed, as the amount and
direction of the feed will depend upon the angle at which the slot in the disc
or part on the short shaft stands in relation to the stud and bowl on the feeding
lever.
When the said slot is at a right angle to the movements imparted to the feeding
lever by the eccentric, there is no feed and when the slot is moved to come on one or
the other side of this neutral position there is more or less feed according to the
amount of angle in relation to the lateral movements given by the excentric.
There is an arm jointed upon the frame to hold a short spindle to carry and rotate
the thread spool when being wound.
Dated this Third day of October 1889.
PETER J. LIVSEY,
Agent.
COMPLETE SPECIFICATION.
Improvements in Sewing Machines.
I, WILLIAM JONES, Director of the firm Jones' Sewing Machine Company Limited
of Guide Bridge, near Manchester, in the County of Lancaster, Sewing Machine
Manufacturers, 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 relates to improved combinations and arrangements of mechanism of
the rotary hook class of sewing machines.
There is the ordinary rotary horizontal shaft in bearings on the arm of the machine,
having the fly and driving wheel at the rear end which can be made fast to or loose
from the shaft by a screw nut on the rear end of the shaft.
On the front end of the shaft there is a disc having a crank pin which gives motion
to the needle slide bar by a connecting rod between the two.
The rear of the disc forms a drum cam to actuate a bell crank lever having its
fulcrum on a stud or screw in the arm, the end of which bell crank lever carries a
small pulley for the needle thread to pass through, this bell crank lever taking up
and giving out the needle thread to the rotary hook.
The needle thread comes from a spool on a pin or stud in the top of the arm, it
then passes to a pinching arrangement formed by the head of a stud in the front
cover plate of the needle slide and a tubular part sliding on the stud acted upon by a
spring which forces the tubular part towards the head of the stud and pinches the
thread slightly when passing between the two.
The needle thread then passes to an ordinary tension pulley arrangement on a stud
in the front plate, the teusion pulley being acted upon by a spring and adjusting
screw.
From the tension pulley the needle thread passes to an arrangement on the front
plate carrying a weak spring through the end of which the needle thread passes, and
then goes to the small pulley in the before mentioned bell crank lever, and from this
lever to a wire curl on the side of the head and then to an ordinary wire catch or
Joop on the lower end of the needle slide bar, and then to the eye of the needle.
There is an arrangement of slide bar for the presser foot lifted and lowered in an
ordinary way by a lever having its fulcrum on the arm.
There is a horizontal rotary shaft in bearings under the cloth plate and on the

page_text: roar end of this shaft there is a disc with a crank pin in it, to which one end of a
short link is jointed which is also jointed at its other end to the lower end of a
connecting rod lever, the upper end of which is jointed with the journal part
of a crank in the upper shaft in the arm.
The connecting rod lever is slotted in its lengthway for a block upon which it
slides to and fro, which block has a hole in it to oscillate upon a pin in the arm.
The connecting rod lever thus slides up and down and oscillates to and fro.
On the front end of the shaft under the cloth plate is an ordinary or well known
arrangement of rotary hook, with the spool case arranged to be held from rotating.
The feeding surface is on the upper face of an arm jointed to two arms on an
oscillating shaft in centre bearings in the framing under the cloth plate, this shaft
extending from the front to the rear of the machine.
The feeding arm receives up and down movement from a cam, behind the rotary
hook, and the feeding movements from an excentric near the crank of the upper
rotary shaft.
This excentric works in a fork and oscillates one end of a lever (hereinafter called
the feeding lever) which at its lower end is jointed to an arm upon the said oscillating
shaft.
There is a stud in the side of the feeding lever having a bowl upon it which can
work in a slot in a disc or part on a short shaft having bearings in the end frame, a
little below the rear bearing in the arm of the frame for the upper rotary shaft.
The outer end of the short shaft has a lever handle secured upon it, for oscillating
the short shaft which has sufficient friction put upon it to prevent it from moving too
easily.
The above described arrangement produces a reversible feed, as the amount and
direction of the feed will depend upon the angle at which the slot in the disc or part
on the short shaft stands in relation to the stud and bowl on the feeding lever.
When the said slot is parallel to the movements imparted to the feeding lever by
the excentric, there is no feed and when the slot is moved to come on one or the
other side of this neutral position there is more or less feed according to the amount
of angle in relation to the lateral movements given by the excentric.
There is an arm jointed upon the frame to hold a short spindle to carry and rotate
the thread spool when being wound.
Fig. 1 is a side elevation, part of the frame under the table being shown in
section.
Fig. 2 is a front end elevation.
Fig. 3 is a sectional elevation on the line A-A fig. 1.
Fig. 4 is a plan section below the table of the machine.
Fig. 5 is an end view of the rotary hook.
Fig. 6 is a side view of the same.
Fig. 7 is an end view of the spool case.
Fig. 8 is an edge view theroof.
a, is the fly wheel fast on the end of the shaft a; b, is a grooved pulley loose on
the shaft a, for the driving band.
This pulley b, can be made fast on the end of the shaft a, by a milled screw b¹, and
loose when thread is to be wound upon spools.
Fast on the front end of the shaft a, there is a drum c, the front of which has a
crank pin c', in it, for one end of a connecting rod d', the other end of which is
jointed upon a pind², ona part secured to the needle slide bard,-which has the ordinary
eye pointed needle d³, secured in it at its lower end and an ordinary guide wire d',
for the needle thread. The drum c, has a cam groove c², in it for a bowl to work
in, which is upon a stud in one arm of a bell crank lever b', having its fulcrum b³,
upon a screw, screwed into the framing-The other end of the bell crauk lever which
passes through a slot in the end cover plate of the arm, has a fork in it for a small
bowl b³, on a screw pin in the end of the bell crank lever.
The needle thread passes from a spool upon a pin e, screwed into the top of the

page_text: arm (the removal of which pin, gives access for oiling the crank bearing hereinafter
mentioned) then to a guide also forming a pinching arrangement, the thread passing
between the head of a pin el, secured in the frame, and the upper face of a collar e²,
which can slide upon the pin e¹, this collar being acted upon by a helical spring,
round the pin el, which forces the collar e², upwards against the head of the pin e¹,
and slightly pinches the thread between the two surfaces.
From this guiding and pinching arrangement e¹, and e², the thread passes over an
ordinary tension pulley on a stud e5, in the front plate, which palley is pressed upon
by a spring e, and screw e³.
The thread passes from the friction pulley to a kn own elastic arrangement formed
by a wire, one end of which is coiled helically and held from uncoiling or moving
upon a stud in a recess in the front cover plate.
up
The free end of the wire is formed into a loop es, one arm of the loop having a
curl to pass round the screw e, so arranged that the loop e³, can oscillate and
down, and put a slight tension upon the needle thread, which passes through the
'loop at the time required to keep it clear of the point of the needle.
From the elastic arrangement, the thread passes over the pulley b³, in the bell
crank lever, and then to a guide wire ex, on the side of the arm, then to an ordinary
guide wire d', at the lower end of the needle slide bar d, and then to the eye of the
needle.
The presser foot f, and its slide bar fl, is arranged in an ordinary manner; 2, being
the lever having its fulcrum at f³, by which it is lifted and held up, as shown best in
fig. 2.
In the shaft a, there is a crank u², formed to which the upper end of a lover
connecting rod g, is jointed.
This rod g, is slotted in its lengthway (see fig. 3) and a block g¹, is fitted in the
slot, the block having a hole in it for a fulcrum pin g, screwing into the framing (see
fig. 1) the rod g, sliding and oscillating upon the swivel block g'.
The lower end of the rod g, is jointed, to one end of a short link g³, (see figs.
and 3) the other end of which is jointed upon a pin gt, in a disc.g³, secured upon the
rear end of a shaft h, having bearings under the cloth plate.
The front end of this shaft h, has the rotary hook h¹, formed upon it, shown
detached by figs. 5 and 6 and into the cavity of the hook, an ordinary spool case i,
is placed, in which the thread spool is inserted, and from which the thread.passes
through a slit in the edge of the case i, under a tension spring , secured by
screws to the edge of the case i, and between it and the case, and leaves at a
notch, in the end of the spring.
The spool case i, is held in position in the cavity of the rotary hook h¹, by.a ring
holder, of ordinary construction, which is hinged or jointed at ji, to a part j
secured by a screw j³, to a projection r, from the framing.
The ring holder is jointed so as to be turned back when the spool case i, is to be
removed or replaced.
The hinged holder j, is held in its position when the machine is sewing, by a
spring j, secured to a part, the free end passing through a loop ja from the side of
the ring, (to give hold when releasing the spring and pulling back the ring) the end of
the spring, having a hole in it which catches upon a short pin projecting from the
side of the ring holder j, when in its sewing position.
wv, is a sliding plate which can be removed to give access to the parts below it.
Upon the shaft (b,
there is an excentrick, (see figs. 1 and 3) which fits in a fork in
the upper end of a lever connecting rod . In the side of this rod there is a pin or
fulcrum stud 2, to fit a hole in a block ³, that can slide in a slot across a disc ', on
the end of a short shaft 45, having its bearings in a split bush x, in a hole in the
framing, held from rotating therein by a pin or other means, this shaft, having a
lever bandle, secured upon its outer end, see figs. 1 and 3. There is a segmental
notch in the boss of the lever, and a pin k, in the framing, which forms a stop to
limit the cscillation of the lever ko, one way, (and thus the length of the stitch) and

page_text: an angle formed piece of metal ³, coming into the notch in the boss, which is secured
to its end by a screw, that passes through a slot in the angle piece, allowing of
adjustment, limits the movement of the lever handle 6, in the other direction, and
thus the length of the stitch. The shaft, has sufficient friction upon it by a
scrow, acting upon the split bush kx, to prevent it from moving except when
required.
The lower end of the lever connecting rod, is jointed to an arm 1x, from a
shaft I, below the cloth plate.
When the slot in the disc k, is at about a right angle to the lengthway of the
lever, the excentrick, will cause the slide block 3, to move in the lengthway of
the slot without producing any end movement in the lever rod, but when the
lengthway of the slot in the disc, is at an angle to the lengthway of the lever rod k³,
end motion will be imparted to it, more or less according to the inclination of the
slot, and this movement will produce a forward or reversed feeding movement in
the cloth being sewn, according to the direction of the inclination of the slot in the
disc kt.
The shaft l, which receives the oscillating motion is carried in screw
centres (2.
cono
This shaft has two vertical arms 13, (see figs. 1, 2 and 4) which have screw cone
centres, for a short shaft +, having an arm s, extending from it (see figs. 2 and 4)
the underside of which slides and rests upon a cam 16, formed or secured at the back
of the rotary hook h¹, for giving the up and down movements to the feeding surface.
One end of an helical spring 1, is attached to the end of the arm 15, and the other
end of the spring, to a stud or hook in the framing, (see figs. 2 and 4) so that the
lever is, is kept down upon the cam lo.
The serrated surface e, to act upon the fabric being sewn. is secured to the upper
surface of the arm or lever l.
m, is a guide or guard to the needle thread, secured by a screw to the underside of
the cloth plate (see figs. 2 and 4).
n, is an arm which is centred upon a stud n³, screwed into the frame.
It has a notch in its boss, and the edges of the notch come against a pin in the
frame which acts as a stop for the vertical position of the arm n, when not in use, and
for the horizontal position (or thereabouts) when the arm n, is in use.
The end of the arm n, has a boss n², that forms the bearing for a short shaft n³,
having a grooved pulley n', upon the outer end of which shaft n³, the spools are
placed to be rotated, when winding thread upon them, the arm n, being then in a
horizontal position, with the grooved pulley nt, pressed against one side of the endless
band, passing over the grooved pulley b.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is.
1. The combination of the straight needle ³, the needle bar d, connecting rod d²,
with crank pin on the end of the drum cam c, the shaft (, in bearings in the arm of
the machine, the crank a², in the shaft a, the swivel or lever connecting rod, g, sliding
and swivelling on a block g' on a fulcrum screw g², the link g³, connecting the lower
end of the rod g, with the crank pin gt, in a disc gs, on the rear end of the shaft h, in
suitable bearings under the cloth plate with a rotary hook h¹, on the front end of the
shaft h, as and for the purpose described.
2. The combination of the parts referred to in claim 1, with the parts for putting
tension upon, and operating the reedle thread namely, the parts e', and e³; e², es, eo,
and e; and e, the cam groove c', in the drum c, the slack thread lever b', and
bowl b³, and guide ex, as and for the purpose described.
3. The combination of the parts referred to by the first claim with the mechanism
for feeding the cloth, namely, excentrick, on shaft a, lever rod, stud therein k²,
swivel blocks, disc, shaft, lever, arm U, on the shaft 7, in cone centre bearings,

page_text: arms 13, shaft, in cone centre bearings, arm 15, from shaft *, serrated surface lo,
spring, and cam, on the shaft h, as and for the purpose described.
4. The combination of the parts referred to in the first claim with the adjustable
hinged ring j, for holding the spool case i, in the cavity of the rotary hook h', the
spring, loop, and guide or guard m, as and for the purpose described.
5. The combination and arrangement of the mechanism as and for the purpose
hereinbefore described and illustrated by the drawings.
PETER J. LIVSEY,
Agent.