IMPROVEMENTS IN SEWING MACHINES
Year: 1884

page_text: "
PROVISIONAL SPECIFICATION.
I WILLIAM JONES of the firm of Jones & Co of Guide Bridge, near Manchester
in the County of Lancaster, Sewing Machine Manufacturers do hereby declare
the nature of said invention for IMPROVEMENTS IN SEWING MACHINES," to be as
follows:-
My invention relates to a combination of mechanism for giving oscillating motion
to a shuttle in Sewing Machines and is more especially applicable to and is intended
to be combined with the arrangement of shuttle mechanism described in the
Provisional Specification filed by me on the 14th day of August 1884 with an
application Numbered 11,255 (which has been accepted) though also applicable for
giving motion to other arrangements of shuttle mechanism and it consists in a
connecting rod one end of which is jointed to a crank on the driving shaft-the
other end of which has a double ended stud having a bowl which works in a cam
groove in a part secured to or forming part of the frame of the machine.
This cam groove is concentric or partly concentric with the shaft or axis of the
shuttle driver on which an arm is secured having a slot in it which slot is or may
be dove-tailed or under cut to fit a block made to slide freely therein.
There is a hole in this slide block which fits one end of the double ended stud in
the end of the said connecting rod so that the bowl works on one end of the stud
and in the cam slot and the slide block works on the other end of the stud and in
the slot in the said arm, the combined action giving the extent of oscillation up to
half a revolution more or less as required.
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page_text: COMPLETE SPECIFICATION.
I WILLIAM JONES of the firm of Jones & 0° of Guide Bridge, near Manchester,
in the County of Lancaster, Sewing Machine Manufacturers, do hereby declare
the nature of said invention for IMPROVEMENTS IN SEWING MACHINES, and in
what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :-
My invention relates to a combination of mechanism for giving oscillating motion
to a shuttle in Sowing Machines and is inore especially applicable to and is intended
to be combined witli the arrangonent of shuttle mechanism described in the
Provisional Specification filed by me on the 14th day of August 1884 with an
application Numbered 11,255 (which has been accepted) though also applicable for
giving motion to other arrangements of shuttlo meclianism and it consists in a
connecting rod one end of which is jointed to a crank on the driving shaft-the
other end of which has a double ended stud or pin having a bowl which works in
a cam groove in a part accured to, or forming part of the frame of the machine.
This cam groove is concentric or partly concentric with the shaft or axis of the
shuttle driver on which an arm is secured having a slot in it which slot is or may
be dove-tailed or under cub to fit a block or bowl made to slide or work freely
therein.
There is a hole in this slide block or bowl which fits one end of the double
ended stud, in the end of the said connecting rod, so that the bowl works on one
end of the stud and in the cam slot, and a slide block or bowl works on the other
end of the stud and in the slot in the said arm the combined action giving the
extent of oscillation up to half a revolution more or less as required,
Fig 1 is a side elevation partly in section at tho driving end of a sewing machine,
a portion of the frame being supposed broken away to show the mechanism more
clearly.
Fig 2 is a cross-section in about the line A-B fig 1..
Some of the parts shown in these figures are the same as, or similar to those
shown in the drawings and described in my Complete Specification in application
for a Patent Numbered 11,255-AD 1884.
a is the base plate of the machine; a the hollow arm; bi the shaft for oscillating
the shuttle driver; a projection from 'the plato a', forming one of its bearings.
d rotary first motion shaft; d' crank upon it; connecting rod attached to the
crank d
'
The lower end of the connecting rod b³, has a pin b* through it, one end of which
pin is for a bowl that fits a cam groove a in a bracket a secured to the base
plate a¹.
This cam groove (a) is or may be of the shapo shown in fig 2 by dotted lines.
The other end of the pin bin the end of the rod bhas another bowl fitted
upon it that works in a straight groove formed in the lengthway of an arm bª
Becured upon the end of the shaft b'.
When a swivel slide block is used in place of a bowl-it is or may be made to
grasp and slide upon the arm 64.

page_text: When the shaft d is rotated the lower end of the connecting rod b³ is caused to
move up and down in a curve by the cam slot a³ and the bowl for the arm b³ has
thus corresponding motion, and acts upon the arm b' to cause it to oscillate in the
are shown by dotted lines x-y in fig 2.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, "I declare that
what I claim is "
In sewing machines the combination of a crank or excentric (d³); a connecting
rod (b); carrying bowls or swivel slide blocks; a part having a cam groove (a³) in
it; and an arm (64) on the axis (61) of the oscillating shuttle driver, substantially
as hereinbefore described and illustrated by the drawings.