Year: 1886

page_text: Date of Application, 13th Aug., 1886.
Complete Left, 13th June, 1887.
Complete Accepted, 13th July, 1887.
I, DANIEL JONES, of 27, Great Frederick Street, Cardiff, in the County of
Glamorgan, builder, do hereby declare the nature of this invention to be as
follows:-
This invention relates to that kind of lock-stitch sewing machines in which an
ordinary reel, contained in a suitable reel carrier, is employed for the supply of the
second or under thread.
It consists, firstly, in an improved arrangement of mechanism for effecting oscilla-
tion or partial rotation alternately in different directions of the hooks which travel
about the carrier for engagement in turn with the loops of the needle thread.
On that end of the driving shaft which is opposite to the driving wheel is a crank
to which is attached one end of a connecting rod the other end of which is connected
to a pin on which is pivotted a block contained a grove cut or otherwise formed in a
disc carried in bearings below the needle plate.
A similar block contained in a groove at the side of the disc opposite to the first
mentioned block is pivotted on a pin fixed in a second disc carried in bearings beyond
the first mentioned disc. The two discs are placed eccentrically to one another in
such relation that while the outer disc rotates through a semicircle, the inner disc,
with which the hooks are connected travels through, appr oximately, three quarters
of a circle.
Motion transmitted from the driving shaft through the connecting rod is imparted
to the outer disc by the connecting rod and, in order to ensure the required continua-
tion of action of the said disc at each limit of its semi-revolution, a rocking lever is
pivotted to the frame of the machine and is so adjusted and connected to the connecting
rod that when the disc arrives at the said limits the block in the outer groove is made
to exert pressure against one side of its groove and the motion of the disc is maintained
in the proper direction. The inner disc is driven from the outer by means of the
blocks sliding in the grooves.

page_text: Instead of discs, short shafts having connected thereto grooved guides with loose
blocks free to work in the grooves of the guides, may be employed.
Or a crank shaft may be used having a rocking lever, similar to that above mentioned,
connected thereto. Under this modification a forked guide is employed and is pivotted
to the bearing of the crank-shaft aforesaid. At the forked end the guide engages
with the crank, and at the other end it is loosely embraced by the rocking lever which
is free to slide thereon. The connecting rod of the driving shaft is connected to the
rocking lever and the motion transmitted thence to the hooks through the guide and
crank shaft.
This invention consists, secondly, in improved means for actuating the needle bar
at the proper speed for engagement of the hooks with the loops of the needle thread
as they, the hooks, present themselves thereto.
On the driving shaft are secured a pair of oval shaped cams disposed at right angles
to one another.
These cams act, as the shaft is rotated, upon the lower end of a connecting rod which
is attached at the other end to the arm or shaft by which motion is imparted to the
needle bar, and the action of the cams is such that the connecting rod and the needle
bar are caused to rise and fall twice during a revolution of the driving shaft, and the
mechanism is so set that the loops of the needle thread are presented to the hooks as
the latter approach for engagement.
A third improvement consists in making the bracket for the reel carrier of the
second or under thread in one piece and free to slide in guides formed on the under-
side of the bed plate.
By making the bracket in one piece, greater accuracy of fit therein of the reel
carrier is obtained, and by making the bracket movable, ready access to the carrier
is afforded, as the bracket may be withdrawn from below the needle, and the
needle-plate being also removable, the bracket and carrier may be readily exposed to
view from above the bed-plate.
The hooks are attached to the shaft or disc from which they derive their motion
by a narrow band or neck and are thus enabled to rotate about the reel-carrier
without coming into contact with or being obstructed by the bracket in which the
carrier is held.
Dated this 19th J...
A D 1000
W. LLOYD WISE,
Per F. J. Brougham,
46, Lincoln's Inn Fields, London, W.C.,
Agent for the Applicant.

page_text: I, DANIEL JONES, of 27, Great Frederick Street, Cardiff, in the County of
Glamorgan, builder, 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 that kind of lock-stitch sewing machines in which an
ordinary reel, contained in a suitable reel-carrier, is employed for the supply of the
second or under thread.
It consists, firstly, in an improved arrangement of mechanism for effecting
oscillation or partial rotation alternately in different directions of the hooks which
travel about the carrier for engagement in turn with the loops of the needle thread.
Instead of employing a crank shaft, as described in the provisional specification left
with my application for Letters Patent, an eccentric is preferred. It is carried on the
driving shaft, and at the lower end the connecting rod thereof is pivotted to a disc or
link secured to the bed plate.
Behind the bracket which supports the carrier in which is contained the reel for the
under thread is a grooved disc in the groove of which works a block carried upon a
pin secured to a second disc placed behind the first mentioned disc. The hooks
whereby the loops of the needle thread are engaged and spread over the reel carrier
are secured to the outer disc.
Motion from the driving shaft is imparted through the eccentric and connecting
rod aforesaid to the inner disc (and thence to the outer disc carrying the hooks) by
means of a rocking lever which, in order to ensure the required continuation of action
of the said disc is connected to the frame of the machine by a universal joint. The
rocking lever exerts a varying pressure upon the inner disc and the outer disc is
actuated from the inner disc and the motion of both is maintained in the proper
direction.
Instead of the discs aforesaid a short shaft may be employed furnished with a
grooved guide to receive the forward end of the rocking lever.

page_text: Under another arrangement a crank shaft is used having a rocking lever connected
thereto by a connecting rod. In this arrangement a forked guide is employed and is
pivotted to the frame of the machine. Through the guide is passed the rod which
connects the rocking lever with the crank shaft and thus the motion is transmitted to
the hook, there being one hook only employed in this arrangement.
This invention consists, secondly, in improved means for actuating the needle bar at
the proper speed for engagement of the hooks with the loops of the needle thread as
they, the hooks, present themselves thereto.
On the driving shaft are secured a pair of oval shaped cams disposed at right angles
to one another. These cams act, as the shaft is rotated, upon the lower end of a con-
necting rod which is attached at the other end to the arm or shaft by which motion is
imparted to the needle bar, and the action of the cams is such that the connecting rod
and the needle bar are caused to rise and fall twice during a revolution of the driving
shaft, and the mechanism is so set that the loops of the needle thread are presented to
the hooks as the latter approach for engagement.
A third improvement consists in making the bracket for the reel carrier of the
second or under thread in one piece and free to slide in guides formed on the underside
of the bed plate.
By making the bracket in one piece, greater accuracy of fit therein of the reel
carrier is obtained and by making the bracket movable, ready access to the carrier is
afforded as the bracket may be withdrawn from below the needle, and the needle plate
being also removable, the bracket and carrier may be readily exposed to view from
above the bed plate.
The hooks are attached to the shaft or disc from which they derive their motion by
a narrow band or neck and are thus enabled to rotate about the reel-carrier without
coming into contact with or being obstructed by the bracket in which the carrier is
held.
Referring to the accompanying sheets of illustrative drawings, Fig. 1, Sheet 1
represents a part side elevation and part vertical section, and Fig. 2 a part end view
of a lock-stitch sewing machine constructed in accordance with one method of
carrying this invention into effect.
The figure on Sheet 2 represents a plan.
Upon the driving shaft a carried an eccentric 6 the connecting rod c of which is
at the lower end pivotted to a disc or link d secured to the bed plate e.
Behind the bracket f which supports the carrier g in which is contained the reel of
the under thread is a grooved disc h in the groove h¹ of which works a block i carried
upon a pin secured to a second disc ; placed behind the disc h.
The hooks A whereby the loops of the needle thread are engaged and spread over
the reel carrier are secured to the disc h.
Motion is imparted from the driving shaft a through the eccentric b, rod c and disc
or link d to the discs h and j through the medium of the rocking lever k attached by
a universal joint to the under side of the bed plate e.
As by the eccentric b the link d is oscillated, the rocking lever is tilted and
oscillated on the joint 7 in such manner that the hooks A are carried partially round
the carrier g first in one direction and then in the opposite direction so as to engage in
regular turn with the loops of the needle thread. By the use of the rocking lever k
and the attendant driving mechanism a longer sweep partially around the carrier
alternately in opposite directions is obtained.
At Fig. 1, Sheet 3 is represented a part vertical section and at Fig. 2 a plan of a
modification comprised in this invention. Under this arrangement a crank shaft a¹ is
connected to the driving shaft a by a link m. To the frame of the machine is pivotted
the forked guide n through the limbs of which is passed the connecting rod c which at
the lower end is embraced by the rocking lever k.
The motion of the driving shaft a is imparted to the link m by the crank a' which
in turn imparts motion through the crank a³ to the crank shaft at the effect being that
a varying speed is transmitted through the rocking lever k to the hook A which is

page_text: adjustable on the lever by the set pin B. Under this arrangement the hook approaches
and engages with the loops at a reduced speed.
Fig. 1, Sheet 4 represents a part vertical section and Fig. 2 a plan of a simplified
arrangement for imparting motion to the rocking lever whereby the hook is driven
about the carrier. To the driving shaft a is secured an eccentric b in a recess in
which is received one end of the rocking lever k. Motion from the driving shaft a is
imparted through the eccentric b to the rocking lever k on the forward end of which
the hook is carried. The rocking lever being mounted on a universal joint / has
motion by which the requisite sweep is imparted to the hook.
Reverting to Sheet 1 the improved means for actuating the needle bar in which
this invention secondly consists are shewn thereon. On the driving shaft a are
secured a pair of cams o disposed at right angles to one another, detached views of
which are shewn at Figs. 3 and 4. They act upon a frame p attached to the lever
which is hinged at q' to the frame of the machine and to a link g connected at its
lower end to the needle bar r. For each revolution of the shaft a the needle bar is
raised and lowered twice by the action of the cams o, the mechanism being so set
that the loops of the needle thread are presented to the hooks as the latter approach
for engagement.
At Fig. 1, Sheet 5 is represented an elevation of an improved brackets for supporting
the reel carrier g. Fig. 2 is a plan of Fig. 1. Figs. 3 and 4 are respectively a front
view and a side view of a reel carrier.
The brackets is made in one piece and is secured to the bed plate e. The carrier g
is contained therein and fits accurately in place. The swell g' on the carrier forms
the tension, and fitting into the bracket, prevents the carrier from rotating.
The modified brackets shewn at Figs. 5, 6, and 7, Sheet 5, are specially adapted for
sliding into place under the bed plate and for ready removal therefrom. At Figs. 8
and are shewn an elevation and plan respectively of a modified form of carrier adapted
for use with the brackets last referred to.
.
This invention relates lastly to the hooks whereby the loops of the needle thread are
engaged.
Various forms of hooks are shewn at Figs. 10, 11, 12, 13, 14, 15, 16 and 17,
Sheet 5, all having in common the feature of a narrow neck or band by which they
are enabled to rotate about the carrier without coming into contact with or being
obstructed by the bracket in which the carrier is held.
Having now particularly described and ascertained the nature of this 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 means whereby motion is transmitted
to the hook or hooks to travel, around or about the carrier, in which the reel of the
under thread is contained, consisting of a rocking lever such as k mounted upon a
universal joint such as and acted upon by means of an eccentric such as b rod c and
link d so as to impart the requisite sweep for hook or hooks about the carrier, sub-
stantially as herein before described with reference to figs. 1 and 2 sheet 1, and the
figure shown on sheet 2 of the accompanying drawings.
2. The modified arrangement for imparting motion to the hook A and rocking
lever herein before described with reference to figs. and 2 sheet 3 of accom-
panying drawings, consisting of a crank shaft such as a' operated through the medium
of the driving shaft a link m crank a³ connecting rod c and guide n and arranged and
operating substantially as set forth.
3. The modified arrangement for imparting motion to the rocking lever k herein-
before described with reference to figs. 1 and 2 sheet 4 of the accompanying drawings,
consisting of the shaft a and recessed eccentric b in the recess of which one end of
the rocking lever is inserted, arranged and operating substantially as set forth.
4. In a two reel lock stitch sewing machine constructing the bracket in which the
reel carrier of the under or second thread is contained, in one piece or in such manner
as to constitute one frame or tubular form of construction substantially as hereinbefore

page_text: described with reference to figs. 1, 2, 5, 6, and 7, sheet 5 of the accompanying
drawings.
5. In a two reel lock stitch sewing machine constructing the hook whereby the
loops of the needle thread are engaged with a narrow neck or band behind the nose
whereby contact with the bracket which supports the reel carrier of the under thread
is obviated as the hook or hooks rotate or travel about the carrier, substantially
as hereinbefore described with reference to figs: 10, 11, 12, 13, 14, 15, and 16,
sheet 5 of the accompanying drawings.
D