IMPROVEMENTS IN OR APPLICABLE TO SEWING MACHINES
Year: 1883

page_text: LETTERS PATENT to William Jones of Stamford Works, Guide Bridge in the
County of Lancaster, Sewing Machine Manufacturer, and Harry Gamwell
of Liverpool in the same County Machinist for an Invention of "IMPROVE-
PROVISIONAL SPECIFICATION left by the said William Jones and Harry
Gamwell at the Office of the Commissioners of Patents on the 21st February
1883.
WILLIAM JONES, of Stamford Works Guide Bridge, in the County of Lancaster
Sewing Machine Manufacturer, and HARRY GAMWELL of Liverpool in the same
County Machinist "IMPROVEMENTS IN OR APPLICABLE TO SEWING MACHINES,"
Our invention relates to that class of sewing machines commonly termed
"Elastic" machines, used for making or repairing boots and shoes, and for other
purposes to which they may be applicable-In this class of sewing machine it is
important to make the "arm" carrying the shuttle and the shuttle, and mechanism
operating it as small and occupying as little space, as possible.
The shuttle is a circular one or nearly so, and nearly fills the shuttle raco, and is
similar to those in common use in this class of sewing machine; Our invention
consists in the mode of constructing the shuttle driver and its arrangement in the
arm," and in the arrangement of the mechanism for giving oscillatory motion to
the shuttle driver, by which arrangement the sliding toothed rack hitherto used in
this class of machines for actuating the shuttle driver, is dispensed with.
t
The shuttle driver is a disc with a projection to drive the shuttle and to this disc
a small toothed pinion is secured in any convenient manner or the shuttle driver
and pinion is formed out of solid metal. The pinion and shuttle driver has a hole
in its axis so as to rotate on a fixed pin or stud, which is, or may be formed out of
the solid metal of the "arm."
With this arrangement the shuttle driver and its pinion can be readily removed
from and replaced in the shuttle race, or it may be secured therein, if preferred.
The shuttle driver may be modified by arranging a narrow bearing between the
pirien and its disc a little larger than the diameter of the tops of the teeth of the

page_text: pinion and by forming a pivot on the lower side of the pinion to fit a hole or
bearing in the arm. The pinion of the shuttle driver is arranged to gear with a
toothed segment having its centre or axis of oscillation on a stud secured in or
formed out of the solid metal of the "arm."
This toothed segment is jointed with one end of a connecting rod the other end
of which receives motion from the ordinary cam for actuating the shuttle, but
adapted to give the movement required.
The rod acted upon by the cam is or may be made to slide endways and the
connecting rod one end of which is jointed with the toothed segment, is jointed to
this sliding rod. By the arrangement described the strain of the toothed segment
comes upon the toothed pinion of the shuttle driver directly opposite its fixed
bearing or fulcrum pin, and there is thus no twisting strain upon the axis or
bearing of the shuttle driver, as when the pinion is on one side of the bearing upon
which it oscillates, as in the arrangement of the ordinary shuttle driver in this
class of machines.
"
By another modification the toothed segment is made double, that is, there is a
large toothed segment on one part and a smaller toothed segmont on the other part
of the disc, both toothed segments being thus in the same plane, with this smaller
toothed segment gears another toothed segment on a fulcrum pin in the "arm
which is jointed with the connecting rod jointed with the rod actuated by the cam.
"This last described modification will give the required oscillation to the shuttle
driver with a less arc of movement in the segment jointed with the connecting rod:
Another, modification of our invention consists in actuating the shuttle driver
arranged as herein before described by a chain or band of suitable material working
upon the pinion or pulley of the shuttle driver. This chain or band is or may be
made to gear with the pinion or be secured to the pulley or simply to drive it by
the adhesion of friction. This chain or band passes round another pulley having
its bearing on a stud in the arm which is or may be adjustable, the chain or band
is connected with a rod from the shuttle cam which thus imparts an oscillatory
motion to the shuttle driver.
When a band is arranged to drive by friction upon a pulley on the axes of the
shuttle driver the latter is arranged with a stop to prevent it from oscillating too
far, either way, and to correct its position of oscillation, and the pulley in the arm
for keeping the band tight is acted upon by a spring to keep the band at the
desired tension.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said William Jones and Harry Gamwell in the Great Seal.Patent
Office on the 15th August 1883.
WILLIAM JONES, of Stamford Works, Guide Bridge, in the County of Lancaster,
Sewing Machine Manufacturer, and Harry Gamwell, of Liverpool, in the same
County, Machinist, "IMPROVEMENTS IN OR APPLICABLE TO SEWING MACHINES,”
Our invention relates to that class of sewing machines commonly termed
Elastic machines used for making or repairing boots and shoes and for other
purposes to which they may be applicable. In this class of sewing machine it is
important to make the "arm" carrying the shuttle and the shuttle, and mechanism
operating it, as small and occupying as little space as possible.
The shuttle is a circular one or nearly so, and nearly fills the shuttle race, and is
similar to those in common use in this class of sewing machines. Our invention
consists in the mode of constructing the shuttle driver and its arrangement in the
"arm," and in the arrangement of the mechanism for giving oscillatory motion to
the shuttle driver, by which arrangement the sliding toothed rack, hitherto used in
this class of machines for actuating the shuttle driver, is dispensed with. The
shuttle driver is a disc with a projection to drive the shuttle and to this disc a
small toothed pinion is secured in any convenient manner or the shuttle driver and
pinion is formed out of solid metal. The pinion and shuttle driver has a hole in
its axis so as to rotate on a fixed pin or stud, which is or may be formed out of the
solid metal of the arm.
With this arrangement the shuttle driver and its pinion can be readily removed
from and replaced in the shuttle race or it may be secured therein if preferred.
The shuttle driver may be modified by arranging a narrow bearing between the
pinion and its disc a little larger than the diameter of the tops of the teeth of the
pinion and by forming a pivot on the lower side of the pinion to fit a hole or
bearing in the arm.
The pinion of the shuttle driver is arranged to gear with a toothed segment
having its centre or axis of oscillation on a stud secured in or formed out of the
solid metal of the "arm." 33
This toothed segment is jointed with one end of a connecting rod, the other end
of which receives motion from the ordinary cam for actuating the shuttle, but
adapted to give the movement required. The rod acted upon by the cam is or may
be made to slide endways in suitable guides and the connecting rod one end of
which is jointed with the toothed segment is jointed to this sliding rod By the
arrangement described the strain of the toothed segment comes upon the toothed
pinion of the shuttle driver directly opposite its fixed bearing or fulcrum pin and
there is thus no twisting strain upon the axis or bearing of the shuttle driver as
when the pinion is on one side of the bearing upon which oscillates as in the
arrangement of the ordinary shuttle driver in this class of machines.
By another modification the toothed segment is made double, that is there is a
large toothed segment on one part and a smaller toothed segment on the other part
of the disc, both toothed segments being thus in the same plane and with this
smaller toothed segment gears another toothed segment, on a fulcrum pin in the
arm
"which is jointed with the connecting rod jointed with the rod actuated by
the cam or directly with the latter rod.
This last described modification will give the required oscillation to the shuttle
driver with a less arc of movement in the segment jointed with the connecting or
actuating rod.
•

page_text: .
of the arm with the hinged cover plate removed, and showing the shuttle and
shuttle driver in position.
Fig 4 is also a plan view of the arm with the shuttle removed showing the
shuttle driver in position.
Fig 5 is a plan view of the arm with the shuttle driver removed
Fig 6 is a vertical section of the arm and parts.
Fig 7 is a view looking underside the arm
Fig 8 is an end view of the arm
Fig 9.is a side view of the rod detached which transmits motion from the cam.
Fig 10 is a view detached, of that side of the toothed segmental wheel which
comes against the underside of the arm and fig 11 is an edge view of it.
Fig 12 is a plan view of the shuttle driver detached and fig 13 an edge view
of it.
Fig 14 is a side view of the shuttle detached, and figs 15 and 16 are edge views
of it on opposite sides.
Fig 17 is a view of the underside of the arm showing an alternative arrangement
for actuating the shuttle driver.
The mechanism of the sewing machine not shown to which our improvements are
applicable is the same as that of the ordinary machine of this class and the rod
which actuates the shuttle driver is also arranged and receives motion in the same
manner, but the cam is shaped to give the movement to the actuating rod to the
extent and at the time required relatively to the movements of the needle.
The drawings represent the parts full size.
a is the arm which carrys the shuttle and connected mechanism, it is or may be
secured on to the arm or projection from the frame of the sewing machine in the
usual manner.
bis the cover plate, which turns on the screw b¹ as a fulcrum, it is elastic and is
sprung up, so that the projection 62 from its under side is released from the needle
slot c when the plate bis to be turned to one side to uncover the shuttle.
b is a hole in the cover plate b. for the needle to pass through.
The shuttle nearly fills the shuttle race, as shown in fig 3-The shuttle is
somewhat similar to an ordinary shuttle used in this class of sewing machine the
case d is formed out of a solid piece of metal with a axis d' for the spool d²-d³ (see
figs 14, 15 and 16) is the top or hook of the shuttle, d' is a notch in the edge of the
shuttle for the projection of the shuttle driver, d' is a spring for giving tension to
the thread, d is a slit in the case of the shuttle, to get the thread from the spool in
the case to the outside of it, under the tension spring d and through the hole d
in the edge of the shuttle case from which it passes to the holo 6³ in the cover
plate b.
Fig 4 shows the shuttle driver in position, and figs 12 and 13 show it detached-
It is a thin disc e with a projection e¹ that enters the notch d' in the edge of the
shuttle and oscillates it both ways.
A part of the top of the shuttle driver disc is slightly sunk at e² to give space
for the thread.
'
The disc has a toothed pinion es secured to it and has a hole et in its axis, that
. fits the stationary pin a¹ solid with the arm, and there is a recess in the arm round
the pin a¹ to give space for the pinion g³ of the shuttle carrier e.
This pinion e gears with the toothed segmental disc f shown in figs 6, 7,10
and 11.
This toothed segmental disc f oscillates on a screw f¹ screwing into the arm and
the toothed segmental disc is jointed with a pin or stud g¹ solid with the rod g
actuated by the cam.
The edge view of this rod g is shown by fig 9-The rod is reduced in thickness
near the pin or stud as shown, and the disc is made narrow on one side (see
figs 10 and 11) so that when in position the outer face of the toothed segmental disc
and the end of the pin g' solid with the rod g, are flush or level.

page_text: The end g¹ of the rod g is free to move to the arc in which the stud g³ moves
when oscillating the toothed segmental disc f.
The shuttle driver e can be readily taken out of its race and replaced therein
when required care being taken to place the driving wheel on the cam shaft in
some predetermined position, say its position, when the shuttle driver is in that
position in which it is shown in fig 3.
Fig 17 shows an alternative mode of transmitting the motion from the
actuating cam to the shuttle driver
f.is a double segmental toothed wheel on an axis f¹ that is, say one half the disc
is a toothed segment of large and the other a toothed segment of small diameter.
The large toothed segment gears with the pinion on the shuttle driver, the small
toothed segment gears with a large toothed segmental disc f³ on an axis f* and
this disc is jointed with a stud g¹ on a rod g actuated by the cam.
The arrangements illustrated by figs 6 and 7 and fig 17 are applicable for
actuating a shuttle driver arranged in the ordinary manner on a short shaft or
axis which oscillates with the shuttle driver-h is a thin plate secured under the
arm a to cover the mechanism.
We have now particularly described the nature of our said invention and the
modes of carrying the same into effect and claim as our invention.
Firstly. The arrangement of the shuttle driver, so as to be oscillated on a fixed
pin, substantially as hereinbefore described and illustrated by the drawings.
Secondly. The construction of the arm so that the stationary axis for the shuttle
driver is formed out of the solid metal of the arm substantially as bereinbefore
described and illustrated by the drawings
Thirdly. The oscillation of the shuttle driver by a toothed wheel, or segment of a
toothed wheel which is directly jointed with a connecting rod or with a rod
actuated by the cam substantially as bereinbefore described and illustrated by the
drawings.
Fourthly. The arrangement of the shuttle driver, so as to be readily removed
from or replaced in the race substantially as hereinbefore described and illustrated
by the drawings.
Fifthly. The combination and arrangement of mechanism, substantially as
herein before described and illustrated by figs 1 to 16 inclusive of the drawings
Sixthly. The combination and arrangement of mechanism for actuating a shuttle
driver substantially as hereinbefore described and illustrating by fig 17 of the
drawings.
Seventhly. The combination of the arrangements of mechanism illustrated by
figs 6 and 7 and fig 17 when applied for actuating the pinion of shuttle drivers
oscillating on a short shaft or axis substantially as hereinbefore described.
In Witness whereof I the said William Jones on my own behalf and on behalf
of the said Harry Gamwell have hereunto set my hand and seal this fourteenth
day of August in the year of our Lord One thousand eight hundred and eighty
three.