Improvements in Sewing Machines
Year: 1895

page_text: Date of Application, 23rd Oct, 1895
Complete Specification Left, 22nd July, 1896-Accepted, 26th Sept., 1896
Improvements in Sewing Machines
I, HARRY SENIOR ELLIS, of Ilove Cottage, Hanover Lane, Leeds, in the
County of York, Mechanical Draughtsman, do hereby declate the nature of this
invention to be as follows .-
This invention relates to improvements in sewing machines of the kind in which
two waxed threads are used by means of a hookel needle and a shuttle working in
guides, either above or below the material being sewn and it has for object to
provide improved means for obviating the wearing or fraying of the thread by its
passage over the barbed hook of the needle whilst the said hook is pulling the
thead though the material.
For this purpose, on the upper surface of a suitable post on standard there is
secured a stitching-cap, immediately under which is artanged to work a bell-ci auk
lever which is fixed on the upper end of a vertical oscillatory shaft mounted in a
suitable bearing or bearings and callying on its lower end a pinion gearing into
a toothed sector on one end of a rocking lever the other end of which receives
motion from a cam secured on the main shaft of the machine. One aim of the said
bell crank level constitutes a thread-giver and forms a hook, having made in one of
its sides and near its outer end, an open-ended slot by means of which, when the arm
is moving in one duection, it takes hold of the thread between the ieel or ball and
the material being sewn, and draws sufficient thead from the reel or ball to form
the loop for the shuttle to pass through, so that the thread is then fice to pass
over the barbed hook without chafing or fi ying. The other arm of the bell clank
lever acts, on the termination of the movement of the said lever in the duection
mentioned, as a threader, pushing the thread up to and against the needle to
eueme that the hook of the needle shall catch the thread in its upward course,
dog which tune there is no o very little motion of the thread on the
said hook.
In one constinction this lever-arm is provided with a pusher adapted to slide in
a slot in the said aim and furnished with a coiled or other suitable spring having
a tendency to move the pusher radially outwards. The pusher has a projecting
pin or finger which, during the motion of the arm towards the needle, engages
with a cam-surface which is formed on the underside of the stitching cap and
forces the finger back towards the axis of the bell-crank lever for a certain
distance; when, however, the motion of the pusher-am just referred to is nearly
completed, the cam-surface allows the sping to force the pusher suddenly forward
against the thread so as to bing the thread against the needle ready to be caught
by the book thereof.
Immediately under the bell-crank lever there is or may be adjustably secured to
the post a stationary th end-eyelet the object of which is to suitably guide the thread
with regard to the needle.
Dated ibis 23rd day of October 1895.

page_text: 1, IARRY SENIOR ELLIS, of Пope Cottage, Hanover Lane, Leeds, in the
County of York, Mechanical Draughtsman, 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
This invention relates to improvements in sewing machines of the kind in which
two waxed threads are used by means of a hooked needle and a shuttle working in
guides, either above or below the material being sewn, and it has for object to
provide improved means for obviating the wearing or fiaying of the thread by its
passage over the bai bed hook of the needle whilst the said hook is pulling the
thread through the material For this purpose, on the upper sui face of a suitable
post or standard, there is secured a stitching cap immediately under which is
arranged to work a bell-crank lover which is fixed to the upper end of a vertical
oscillatory shaft mounted in a suitable bearing or bearings and cartying on its lower
end a pinion gearing into a toothed sector on one end of a rocking level the other
end of which receives motion from a cam secured on the main shaft of the machine.
One arm of the said bell clank lever constitutes a thread-giver and forms a hook,
having made in one of its sides and near its outer end, an open-ended slot by means
of which when the aim is moving in one direction, it takes hold of the thread between
the reel or ball and the material being sewn, and draws sufficient thread from the
Teel on ball to form the loop for the shuttle to pass though so that the thread is
then free to pass over the barbed hook without chafing or fraying. The other
arm of the bell crank level acts, on the termination of the movement of the said
lever in the direction mentioned as a threader, pushing the thread up to and against
the needle to ensure that the hook of the needle shall catch the thread in its upward
course during which time there is no or very little motion of the thread over the
said hook. In one construction the said lever aim is provided with a pusher adapted
to slide in a slot in the said aim and furnished with a coiled or other suitable
spring having a tendency to move the pusher radially outwards. The pushet has
a projecting pin or finger which, during the motion of the arm towards the needle,
engages with a cam-surface which is formed on the underside of the stitching cap
and forces the finger back towards the axis of the bell crauk lever for a certain
distance when, bonerct, the motion of the pusher aim just referred to is nearly
completed, the cam sun faco allows the spring to force the pusher suddenly forward
against the thread so as to bring the thread against the needle ready to be caught
by the hook thereof.
Immediately under the bell crank lever there is or may be adjustably secured to
the post, a stationary thread-eyelet the object of which is to suitably guide the thread
with regard to the needle.
And in order that my invention may be clearly understood and readily carried
into effect I will proceed to describe the same with the aid of the accompanying
drawing wherein
Figs. 1 and 2 are elevations at right angles to each other, showing a post of a
sewing machine fitted with apparatus according to this invention
Figs. 3 and 4 are respectively a plan and side olevation of a threading
attachment.
Fig. 5 is a plan showing more particularly how the thread is pushed towards the
needle.

page_text: Fig. 6 is a similar view to Fig. 5 but showing a modified construction of
thread pusher, & Fig. 7 is a side elevation of such thread pusher and attached
parts.
Que
On the upper surface of the post or pillai a is secured the stitching cap 6 which
has neat one end thereof an elongated hole or slot c for the passage of the needled.
e is a shaft mounted in a vertical beating in the post a and having fixed to its
lower end a toothed pinion arranged to be rotated alternately in opposite
directions by a toothed sector g on one end of a rocking lever the other end of
which receives motion from a cam on the main shaft ol the machine. (Figs. 1
to 5 inclusive) is a bell crank lever secured on the upper end of the shaft e
arm of this lever is formed with a hook shaped thread-given the other arm of
the level being provided with a longitudinal slot m and made with parallel sules/
on which is mounted, so as to slide freely thereon, a movable pusher n, furnished
with a cap o.
This cap is secured to the pushet n by the sciew p having
projecting from its end the finger q, the pusher n being normally kept dially
outwards by a coiled spring that is attached at one end to a più s on the
With this arrangement,
pusher n and at the other end to a pint on the lever .
on the bell crank lever being oscillated, the hook will take hold of the thread »
and carry it forward as shown in Fig. 5. The arm with the pusher n following,
the finger g takes into a cam groove formed on the underside of the stitching
спр
band causes the pusher n to be diawn back until the finger antives at the
point w whereupon the groove allows the spring to force the pusher forward against
the thiend u and cause the same to partly su round the needle as shown in Fig 5,
ready for the hook of the needle to take hold of it in its next upward movement.
O the pushein may be pulled towards the end a of the parallel slide / by a coiled
spring similar to r but acting in the reverse manner. In this case on the bell crank
lever being oscillated, the finger g takes into a cain groove similar to v, (formed
in the underside of the stitching cap b) until it arrives at the point to when it is
pushed forward by the remaining portion of the cam groove y so as to cause the
pusher to act against the thread u and canse it to piess against and to partly surround
the shank of the needle d ready for the hook thereof to take hold of in its next
upward movement.
2
In Figs. 6 and 7 a thread pusher a' works in an open ended alot in the aim o¹
of the bell ciauk lever and has a pin d' formed ou it which works through a
bearing e secured to the lever c', this pusher a¹ being kept radially outwards by
a coiled spung placed on the pin d' one end of which bears against the bearing e¹
whilst the other acts against the pushei a'. Ou oscillating the bell clank lever,
the hook takes hold of the thread u in the manner herembefore descubed and tho
pusher a following, comes in contact with the inner surface o¹ of a thread
eyelet whereby it is pushed backwards a short distance and on further movement
permitted to expand and push the thread U against and partly around the needle d
as already described.
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 18-
1. In a sewing machine of the kind in which two wax threads are used by means
of a hooked needle and a shuttle working in guides, providing or supplying thread
to the book of the needle substantially in the manner and by the means herembefore
described so as to prevent chafing or laying of the thread whilst the hook is pulling
the thread through the material to be sewn.
2. In a sewing machine of the kind referred to in the preceding claim placing or
pushing the thread up to and against the needle substantially in the manner aud by
the means herein before described.
3. In a sewing machine of the kind herein referred to, the combined thread giving
5 and thread pushing devices constructed arranged and operating substantially as

page_text: here before described with reference respectively to and shown in Figs. 1 to 5
inclusive, and in Figs. 6 and 7 of the drawings annexed.
Dated this 21st day of July 1896.
For the Applicam,
W. LLOYD WISE,
46 Lincoln's Inn Fields, London, W.C., Chartered Patent, Agent.