Improvements in Sewing Machines.
Year: 1895

page_text: Date of Application, 19th Aug., 1895
Complete Specification Left, 18th May, 1896-Accepted, 19th Aug., 1896
Improvements in Sewing Machines.
I, HARRY SENIOR ELLIS, of Hope Cottage, Hanover Lane, Leeds, in the
County of York, Mechanical Draughtsman, do hereby declare 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 hooked needle and a shuttle working
above the work or material under treatment.
According thereto the shuttle used in such a machine is constructed in such
manner as to obviate the necessity of a separate stripper such as is now usually
employed for disengaging the thread from the hook. of the needle just before
tightening the stitch; the means for driving the shuttle are simplified; means are
provided for readily removing the spool from the shuttle and the shuttle from its
race; and the means of lifting the presser-foot at each stroke of the needle are
improved.
The shuttle is provided at its front end with a central point of inverted beak-
shape for the purpose of opening the loop of thread on the hooked needle to
enable the body of the shuttle to enter therein, and a hole is made in the rear end
of the shuttle, the arrangement being such that the shuttle when in operation passes
partly through the loop, and the needle then descends into the said hole and
thereby lifts the thread out of the hooked part of the needle, immediately after
which the thread is drawn over the rear end of the shuttle and tightened in the
material in the usual manner.
The shuttle is reciprocated in a curvilinear slide by a driver attached to one end
of a bell-crank lever which is mounted on a stud and the other end of which carries
a toothed sector gearing into another toothed sector on a lever which is adapted
to oscillate on a stud and the other end of which is in engagement with a cam on
the main shaft.
The spool is arranged transversely in the shuttle and is provided with pivots
which project from its ends, and engage in recesses in plates secured to the sides
of the shuttle. One of these plates is readily removable to enable the spool to be
easily and quickly removed and inserted. The underside of the shuttle is furnished
with means for imparting the requisite tension to the thread.
The curvilinear shuttle-race is formed of two guides of which one is secured to
the main body of the machine, whilst the other is hinged thereto so as to allow it
to be lifted or opened sufficiently for the shuttle to be removed from the race.
In each guide, in the line of travel of the needle, there is provided a suitable
recess for the thread to expand in whilst the shuttle is passing through the loop.
The presser-bar which is preferably of rectangular section, is raised, whilst the
material is being fed during each stroke of the needle, by means of a lever, one end
of which engages in a cam on the main shaft of the machine, whilst the other end
is forked and embraces a stud secured to one end of a collar-piece having a
rectangular central hole in which the presser-bar fits loosely. The other end of
the collar-piece is connected by a spring to a stationary portion of the machine
against which it tends to keep the lower ends of two regulating-screws provided in
the collar-piece at opposite sides of the presser-bar. When the forked lever is
lifting the collar-piece, the spring on the other end, pulling downwards, causes the
DOJ7

page_text: collar-piece to tilt until the opposite top and opposite edges of the sides forming
the rectangular hole lock against the presser-bar which is then lifted the required
distance by the lever. During the descent of the lever, it first releases the presser-
bar which descends upon the work; and it then presses the collar-piece down on
its own side, again locking the collar-piece against the presser-bar, and locks the
latter down on the work, the requisite pressure on the presser-bar being furnished
by a coiled spring or other suitable means.
DOLL
1005
R. E. P. CRAVEN,
Registered Patent Agent,
22 Victoria Chambers, South Parade, Leeds, Agent to the Applicant.
Improvements in Sewing Machines.
I, HARRY SENIOR ELLIS, of Hope 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
above the work or material under treatment.
According thereto the shuttle used in such a machine is constructed in such
manner as to obviate the necessity of a separate stripper such as is now usually
employed for disengaging the thread from the hook of the needle just before
tightening the stitch; the means for driving the shuttle are simplified; means are
provided for readily removing the spool from the shuttle and the shuttle from its
race; and the means for lifting the presser-foot at each stroke of the needle are
improved, and in order that my invention may be clearly understood I will now
proceed to describe the same with reference to the accompanying drawing
wherein
Figs. 1 and 2 are respectively side and front elevations of a sewing machine
embodying my invention;
Fig. 3 is a plan of the work support or post of this machine;
Figs. 4, 5 and 6 are respectively side, front and plan views respectively of the
shuttle; and
Fig. 7 is a plan of a collar piece hereinafter more particularly described.
For the purpose of opening a loop of thread held by the hooked needle 1 so as
to enable the body of the shuttle 2 to enter therein, the shuttle is provided at its
front upper part with a loop opener in the form of a ceutrally pointed projecting
part 3 having a tapered clearance groove 4 therein for the needle; and for stripping
the loop from the needle, the rear end of the shuttle is provided with an elongated
bole or slot 5, the arrangement being such that when in operation the shuttle first
passes partly through the loop, and the needle then descends into the said hole or
slot 5 so that the thread by being arrested by the upper side of the shuttle becomes
disengaged or stripped from the hooked part of the needle, immediately after which
the thread is drawn over the rear end 1 of the shuttle and tightened in the material
in the usual manner.
The shuttle is provided at opposite sides with curvilinear projections 6 and 6" by
which it is supported and guided in a curvilinear shuttle-race. It is reciprocated
by a fork-shaped driver 7 attached to one end of a bell-crank lever 8 which is
mounted on a stud 9 and the other end of which carries a toothed sector 10 in

page_text: gear with another toothed sector 11 on a lever 12 which is adapted to oscillate on
a stud 13 and the other end of which is in engagement with a cam 14 on the main:
driving-shaft 15 of the machine.
thread.
The thread spool 16 is arranged in a transverse hole 17, in the shuttle 2 and is.
provided with pivots 16 16 which project from its ends, and engage in recesses in.
plates 17, 17 respectively secured to the sides of the shuttle. One of these
plates viz. 17, is connected to the shuttle by a screw 18 so that it can be readily
removed or turned aside to enable the spool to be easily and quickly removed and
inserted. The shuttle has a hole 19 through its lower part for the passage of the.
spool thread to the underside of the shuttle which is furnished with means
such as
a perforated projection 19* for imparting the requisite tension to the
The curvilinear shuttle-race is formed of two guides 20, 20 of which one viz. 20,
is secured to the head 21, of the machine, whilst the other 20 is hinged thereto by
a screw 22 so as to admit of its being lifted or opened out laterally sufficiently to
enable the shuttle 2 to be removed from the race. In each guide, 20, 20, at points
in the same vertical plane as the needle, there is provided a suitable recess 23 into.
which the loop of thread is able to expand whilst the shuttle is passing through it.
To enable the spool to be removed from the shuttle whilst the latter is in its
race, and after suitably moving the plate 17, the underside of each guide 20, 20"
is formed with a concave recess 24.
The presser-bar 25, which is preferably of rectangular section, as shown, is.
arranged to be raised, whilst the material is being fed during each stroke of the
Deedle, by means of a lever 26, one end of which engages in a cam 27 on the main
shaft 15, of the machine whilst the other end is forked as shown at 26* and embraces
a block 28 pivoted on a stud 29 secured to one end of a collar-piece 30 which is
formed with a rectangular hole in which the presser-bar 25 fits loosely. The
other end of the collar-piece is provided with a pin 31 that is connected by a
spring 32 to a similar pin 33 fixed to the head 21 of the machine against which
the spring tends to keep the lower ends of two regulating-screws 34 provided on
the collar-piece 30 at opposite sides of the presser-bar 25. The arrangement is
such that when the forked lever 26 is lifting one end of the collar-piece 30, the
spring 32 at the other end, pulling downwards, causes the collar-piece to tilt until
the opposite top and bottom edges 30%, 30° respectively of the rectangular hole
therein lock against the presser-bar 25 which is then lifted the required distance
by the said lever. During the descent of the lever, it first releases the presser-
bar which descenda upon the work; and it then presses the collar-piece down on
its own side, again locking the collar-piece against the presser-bar, but by the
opposite edges 30°, 30° and locks the said presser-bar down on the work, the
requisite pressure on the presser-bar being furnished by a coiled spring 35 or other
suitable means.
The needle 1 is reciprocated in the ordinary way by a lever 36 from the cam 27,
and the work is supported by a pillar 37 of the ordinary construction.
Having now particularly described and ascertained the nature of this inven-.
tion and in what manner the same is to be performed I declare that what I
claim is:-
1. In a sewing machine of the kind herein referred to, a shuttle provided at its
front upper end with a loop opener 3 and at its rear end with a hole 5 substantially
as described and shown for the purpose specified.
2. The improved shuttle with spool support constructed and operating as
herein before described with reference to and shown in the accompanying
drawings.
3. In a sewing machine of the kind herein referred to, a curvilinear shuttle
race made in two parts one of which is fixed to the machine and the other of
which is hinged or jointed thereto so as to admit of its being lifted or opened
sufficiently to enable the shuttle to be easily removed from the race, and.

page_text: replaced substantially as hereinbefore described with reference to the drawings
annexed.
4. In a sewing machine of the kind herein referred to, the improved means
for lifting the presser bar, comprising a collar piece formed with a rectangular
hole loosely fitting the presser bar and provided with regulating screws, a forked
lever adapted to act upon one end of the collar piece and lift it and a spring
acting upon the other end of said collar-piece, substantially as hereinbefore described
with reference to the drawings annexed for the purpose specified.
5. In a sewing machine the combination & arrangement of parts hereinbefore
described with reference to and shown in the drawings annexed.
D
101
1000
R. E. P. CRAVEN,
Registered Patent Agent,
22 Victoria Chambers, South Parade, Leeds, Agent for the Applicant.