Improvements in and relating to Rotary Shuttles for Sewing Machines.
Year: 1891

page_text: Date of Application, 12th Feb., 1891
Complete Specification Left, 10th Nov., 1891-Accepted, 23rd Jan., 1892
PROVISIONAL SPECIFICATION.
Improvements in and relating to Rotary Shuttles for Sewing
Machines.
I HARREY MOORE of High Street, Wellingborough in the County of
Northampton Machine Agent do hereby declare the nature of this invention
to be as follows:-
65
"
This invention relates to means for adjusting the rotary shuttle of a sewing
machine in position in its "race" of taking up the wear of the shuttle in the
race and of applying to such shuttles a spherical thread-case to contain the
underthread employed in lock stitch sewing machines such thread being inserted in
the spherical thread-case (formed of two half spheres closing together) either
wound in the shape of a ball or upon a small reel.
For this purpose I construct the various parts of the sewing machine which
apply to the improvements hereinbefore referred to in the manner shown by the
accompanying drawings in all the figures of which the same part is indicated by
like reference letters.
Figure 1 is an end view of the under part of a sewing machine having the
above mentioned improvements applied thereto.
Figure 2 is a side elevation of Figure 1 partly in section.
Figure 3 is a cross section of the rotary shuttle and the "
revolves.
race
"in which it
A represents the cloth-plate of the sewing machine depending from which is the
bracket B which carries the "race" in which the rotary shuttle revolves. I make
the bearing pieces CD which constitute the "race" preferably U shape in cross
section as shown particularly in Figure 3 and I make a corresponding U shape
recess at the periphery of the rotary shuttle to fit the race. In order that
the position of the centre of rotation of the rotary shuttle E may be adjusted
laterally and in order that any wear between the contact surfaces of the rotary
shuttle E and the ". race "CD in which it revolves may be adjusted I secure
the bearing pieces C D to the bracket B by means of the screws F the holes
in C D through which the screws F pass being elongated laterally to allow for
lateral movement of the bearings C D controllable by the set screws G Bo as to
obtain adjustment either for bringing the bearings CD in closer contact with the
rotary shuttle E to take up wear or to allow for lateral adjustment of the hook
of the rotary shuttle with regard to the position of the needle of the sewing
machine as may be required.
In order to apply a spherical thread-case to contain the under thread for look
stitch sewing machines to a rotary shuttle revolving in a "race "I provide a
projection H within the rotary shuttle E to support the spherical thread-case
containing the underthread J at its inner side; its outer side being supported upon
a ball K loosely carried in a latch lever L held in an upright position by the
latch M controlled by a spring N. The latch lever L is forked at the extremity P
to engage a projection Q on the spherical thread-case J to prevent the thread-case
from rotating with the rotary shuttle E. Thus the spherical thread-case J,
incapable of rotating, is loosely suspended in its bearings in a manner to allow for
the rapid passage of the loop formed at each successive dip of the needle so as to
enclose the thread R drawn from within the spherical thread-case J through
tension band S to complete the lock stitch.
Dated this 11th day of February 1891.
:.
AYRTON & THOMAS,
Patent Agents.

page_text: COMPLETE SPECIFICATION.
Improvements in and relating to Rotary Shuttles for Sewing
Machines.
I HARREY MOORE of High Street, Wellingborough in the County of
Northampton, Machine Agent, 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 means of adjusting the rotary shuttle of a sewing
machine in position in its
" race of taking up the wear of the shuttle in the
"race "
and of applying to such shuttles a spherical thread-case to contain the
underthread employed in lock stitch sewing machines such thread being inserted in
the spherical thread-case (formed of two half spheres closing together) either wound
in the shape of a ball or upon a small reel.
For this purpose I construct the various parts of the sewing machine which apply
to the improvements herein before referred to in the manner shown by the drawings
left with the Provisional Specification in all the figures of which the same part is
indicated by like letters of reference.
Figure 1 is an end view of the under part of a sewing machine having the above
mentioned improvements applied thereto.
Figure 2 is a side elevation of Figure 1 partly in section.
Figure 3 is a cross section of the rotary shuttle and the "
revolves.
"
"
"
race in which it
A represents the cloth-plate of the sewing machine depending from which is the
bracket B which carries the ". "
race in which the rotary shuttle revolves. I make
the bearing pieces CD which constitute the "race" preferably U shape in cross
section as shown particularly in Figure 3, and I make a corresponding Ushape
recess at the periphery of the rotary shuttle to fit the "race." In order that the
position of the centre of rotation of the rotary shuttle E may be adjusted laterally
and in order that any wear between the contact surfaces of the rotary shuttle E
and the " race CD in which it revolves may be adjusted I secure the bearing
pieces CD to the bracket B by means of the screws F, the holes in C D through
which the screws F pass being elongated laterally to allow for lateral movement of
the bearings CD controllable by the set screws G so as to obtain adjustment either
for bringing the bearings C D in closer contact with the rotary shuttle E to take
up wear or to allow for lateral adjustment of the hook of the rotary shuttle
with regard to the position of the needle of the sewing machine as may be
required.
"race
In order to apply a spherical thread-case to contain the underthread for look
stitch sewing machines to a rotary shuttle revolving in a
I provide a
projection within the rotary shuttle E to support the spherical thread-case
containing the underthread J, at its inner side; its outer side being supported upon
a ball Kloosely carried in a latch lever L held in an upright position by the
tatch M controlled by a spring N. The latch lever L is forked at the extremity P
to engage a projection Q on the spherical thread-case J to prevent the thread-oase
from rotating with the rotary shuttle E. Thus the spherical thread-case J, incapable
of rotating, is loosely suspended in its bearings in a manner to allow for the rapid
passage of the loop formed at each successive dip of the needle so as to enclose the
thread R drawn from within the spherical thread-case J through a tension band S.
to complete the lock stitch.
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 :-

page_text: screws F and controllable by set screws G substantially as and for the purposes
described.
<6
2. In a sewing machine a rotary shuttle carried in a race having loosely
suspended within the rotary shuttle a spherical thread-case to contain the underthread,
wound in the form of a ball or upon a reel to be loosely enclosed in the spherical
thread-case substantially as described.
Dated this 10th day of November 1891
AYRTON & THOMAS,
Agents for the Applicant.