IMPROVEMENTS IN OSCILLATING-SHUTTLE SEWING MACHINES
Year: 1885

page_text: We, JOHN MORTON, and WILLIAM URIE MORTON, of 11 Bothwell Circus,
Glasgow, in the County of Lanark, North Britain, Sewing Machine Manufacturers,
do hereby declare the nature of our said invention for "IMPROVEMENTS IN
OSCILLATING-SHUTTLE SEWING MACHINES," to be as follows, that is to say :-
Our said Invention has for its object to improve the construction and action of
various parts of sewing machines of the kind working with oscillating shuttles, and .
with vertically reciprocating needles.
In carrying out our Invention the rocking shaft by which the shuttle is driven
is itself driven by means of a pinion fixed or formed on it and gearing with a
toothed sector which is on a rocking spindle carried in adjustable bearings. The
toothed sector is actuated by means of a connecting rod from a crank or eccentric
on the horizontal rotating shaft which works the needle.
.
The shuttle is made in two pieces, one of which is a ring for securing the spool in
the shuttle this ring being formed with a cylindrical flange of thin spring metal
which is made with slits to allow of its being sprung into its seat, a raised part of
the flange springing into a recess provided for it in the seat. An ejector which is
a curved lever centered on a fixed part of the machine is provided for putting out
the spool and its retaining ring from the shuttle when required.
The feed movement giving the length of stitch is transmitted from a cam on the
horizontal rotating shaft through a nearly vertical lever the lower end of which is
connected to a lever on a horizontal rocking shaft beneath the plate of the machine.
The nearly-vertical lever passes through a small slotted block which can oscillate
on a fulcrum pin and this fulcrum pin is adjustable in a vertical slot in the side of
the arm of the machine. The stitch is made longer or shorter accordingly as the
fulcrum pin is raised or lowered.
The feed dog is formed or fixed on part of a small frame or carrier which is
below the plate and extends from near the middle towards the side where it is
jointed to arms on the rocking shaft herein before referred to. Another part of the
small frame or carrier rests on a cam on the rocking shaft which drives the shuttle;
and in this way the required up and down movement of the feed dog is obtained
separately from the variable horizontal movement which determines the length of
the stitch.

page_text: The presser bar is round and is kept from turning by a piece fixed on it and
which serves at the same time for the lifting cam to act on. And on this piece
attached to the presser bar there is formed a small indented or cam surface which
when the presser bar is raised pushes outwards a pin connected to the tension
device for the needle thread, the pressing plates being thereby pushed apart and
the tension relieved. When the presser bar is again lowered the spring of the
tension device restores the parts to their working position.
The rocking shaft herein before referred to is extended through the shuttle driver
and attached to this extension is a guide for the purpose of keeping the shuttle
thread clear of the point of the shuttle and of the point of the needle and to act as
a guide for the needle.

page_text: We, JOHN MORTON and WILLIAM URIE MORTON, of 11 Bothwell Circus,
Glasgow, in the County of Lanark, North Britain, 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, that is to say:―
Our said Invention has for its object to improve the construction and action of
various parts of sewing machines of the kind working with oscillating shuttles,
and with vertically reciprocating needles.
We hereunto append a sheet of explanatory drawings showing our improvements
which will be most readily explained with the aid of such drawings. Figure, 1, is
an inverted plan of a sewing machine fitted with our improved details, figure, 2, is a
vertical section through the vertical part of the overhanging arm; figure, 3, is a
front end elevation but with the plate or table in vertical section and with the
front plate removed from the end of the arm; figure, 4, is a front elevation and
figure, 5, is a vertical section of the shuttle; figure, 6, is a section of a part which
holds the spool or bobbin in the shuttle; figure, 7, comprises a section of the
tension device for the needle thread and other details; figure, 8, is an inner side
view of a part for varying the length of stitch; and figure, 9, is an enlarged
sectional view of the feed dog and parts which raise and lower it. In these
drawings the same reference numerals are used to mark the same or like parts
wherever they are repeated.
.
In carrying out our Invention the rocking shaft, 11, by which the shuttlė, 12, is
driven, is itself driven by means of a pinion, 13, fixed or formed on its back end,
and gearing with a toothed sector, 14, which is on a rocking spindle, 15, carried
in adjustable bearings, 16. The toothed sector, 14, is actuated by means of a
connecting rod, 17, jointed to an arm, 18, on the rocking spindle, 15, and having
its upper end jointed on a crank, 19, on the horizontal rotating shaft, 20, which
works the needle and which may be driven in any known way.
The shuttle, 12, is made in two pieces one, 21, of which is a ring, shown sepa-
rately in figure, 6, for securing the spool, 22, in the shuttle, this ring, 21, being
formed with a cylindrical flange of thin spring metal, and open at one part to allow
of its being sprung into its seat in the shuttle, a raised part at the inner edge of
the flange springing into a recess provided for it in the seat. An ejector, 23,
which is a curved lever, centered on a fixed part of the machine, is provided for
putting out the spool, 22, and its retaining ring, 21, from the shuttle, 12, when
required.
The feed movement giving the length of stitch is transmitted from a cam, 24, on
the horizontal rotating shaft, 20, through a nearly vertical lever, 25, the lower end
of which is connected by a link, 26, to a lever, 27, on a horizontal rocking shaft, 28,
beneath the plate of the machine. The nearly vertical lever, 25, passes through a
small slotted block, 29, which can oscillate on a fulcrum pin formed on it and fitted
in a bearing, 30, formed or fixed on a slide, 31, which is adjustable in a vertical
guide slot in the side of the arm of the machine. The slide, 31, can be fixed in
any position in its guide by a pinching screw, 32; and the stitch is made longer
or shorter accordingly as the slide and fulcrum are fixed in a higher or lower
position,

page_text: The feed dog, 33, is formed or fixed on an arm, 34, forming part of a small frame
or carrier, 34, 35, 36, which is below the plate, and extends from near the middle
towards the side where it is jointed to arms on the rocking shaft, 28, hereinbefore
referred to. Another arm or part, 36, of the small frame or carrier rests on a
cam, 37, on the rocking shaft, 11, which drives the shuttle; and in this way the
required up and down movement of the feed dog, 33, is obtained from the cam, 37,
separately from the variable horizontal movement which determines the length of
stitch and is transmitted by the rocking shaft, 28.
The presser bar, 38, is round and is kept from turning by a piece, 39, fixed on
it, and which serves at the same time for the lifting cam, 40, to act on.
And on
this lifting cam there is formed a small indented surface to act on the thread
tension device. This tension device which is indicated by a dotted circle, 41, in
figure, 3, being on the outside of the front plate supposed to be removed in that
figure, is shown in section in figure, 7, and consists of two plates, 42, of the usual.
kind pressed together by a spring, 43, adjustable by means of a nut screwed on the
stud, 44. The spring, 43, bears on a disk, 45, (shown separately in face view) made
with a bar across its central opening, which bar enters a slot formed in the stud, 44.
The inner part of the stud, 44, is hollow and contains a pin, 46, which projects at
the back of the front cover plate, 47, into which the stud, 44, is screwed; and
this pin, 46, is acted upon by the inclined bottom of the indentation in the face of
the cam, 40. When the cam, 40, is turned up to lift up the presser bar, 38, the
inclined indentation on it pushes outwards the pin, 46, which acting on the disk, 45,
takes the pressure of the spring, 43, off the tension disks, 42. When the cam, 40,
is turned to lower the pressure bar, 38, the spring, 43, again bears on the tension
disks, 42. The boss in which the stud, 44, is fixed is shown in front view with a
part of the front plate, 47, at the right-hand side of figure, 7, together with a
small spring guide eye, 48, through which the needle thread passes on its way
from the tension device.
Having now particularly described and ascertained the nature of our said
Invention and in what manner the same is to be performed we declare that
what we claim is :-
:-
1. The combination of parts for driving the rocking shaft which work the
shuttle, the pinion and toothed sector being the principal feature thereof sub-
stantially as herein before described.
2. The improved construction of the shuttle with a detachable spring ring for
retaining the spool, substantially as herein before described.
3. The application of the ejector lever for putting the spool out of the shuttle,
substantially as herein before described.
4. The combination of parts by which the horizontal feed is effected and length
of stitch adjusted substantially as hereinbefore described.
5. The imparting of the vertical movement of the feed dog by a cam on the
rocking shaft which works the shuttle, the horizontal feed being imparted by a
separate rocking shaft and the two actions being combined substantially as
herein before described.
6. The improved construction of presser bar combined by the arrangement of
the lifting cam in connection with it substantially as herein before described.
7. The arranging of the tension device so as to be relieved by the action of the
cam when lifting the presser bar substantially as hereinbefore described.
Dated this ninth day of Anril 1886
EDMUND HUNT,
Applicants' Agent.