IMPROVEMENTS IN APPARATUS APPLICABLE TO SEWING MACHINES FOR BUTTON HOLE AND OVER- HEAD STITCHING
Year: 1882

page_text: LETTERS PATENT to John Imray of No 28 Southampton Buildings Chancery
Lane in the County of Middlesex for an Invention of IMPROVEMENTS IN
APPARATUS APPLICABLE TO SEWING MACHINES FOR BUTTON HOLE AND OVER-
HEAD STITCHING. Communicated to him from abroad by Messrs Grimme
Natalis & Co of Brunswick in the German Empire
PROVISIONAL SPECIFICATION left by the said John Imray at the Office
of the Commissioners of Patents on the 9th August 1882.
JOHN IMRAY of N° 28 Southampton Buildings Chancery Lane in the County of
Middlesex "IMPROVEMENTS IN APPARATUS APPLICABLE TO SEWING MACHINES FOR
BUTTON HOLE AND OVERHEAD STITCHING [Communicated to him from abroad
by Messrs Grimme Natalis & Co of Brunswick in the German Empire]
13
This invention relates to apparatus which can be applied to sewing machines for
effecting button-hole or overhead stitching. The nature of this apparatus will be
understood from the accompanying drawings: Fig. 1 shewing a plan, Fig. 2 a side
view and Fig. 3 an end view of the arm of a sewing machine with the apparatus
attached thereto, Fig. 4 shewing the feed plate and needle hole through it and
Fig. 5 being a cross section shewing to an enlarged scale the part marked k. On
the horizontal spindle within the arm of the machine is fixed a bevil pinion a
gearing with a bevil wheel 6 of double the diameter mounted on a bracket of the
arm On the axis of ba coned cam c is fixed by a set screw by which it can be
adjusted to or fro so as to bring a larger or smaller part of the cone of the cam to
act on a roller mounted on a sliding bar d which is pressed towards the cam by a
spring f. To the bar d is attached the double yoke e e which embraces the vertical
needle slide h, engaged by a pin i with the needle bar g.
Between the collar m

page_text: and the abutment n is mounted a lever k which in the position I (Fig. 5) holds the
needle at its farthest extreme towards the front so that it always descends through
the hole o of the feed plate the cam c being in that case ineffective. When the
lever is raised to the position II the bar d with the needle bar is permitted to
make half its stroke backwards, so that the needle descends alternately through o
and p making a series of short zig-zag stitches. When k is raised to the position III,
the bar d with the needle bar can make its full stroke so that the needle descends
alternately through o and q making a series of long zigzag stitches. The to and
fro movement of the needle and consequently the length of the zig-zag of a stitch
can be varied by moving the cam c along its axis so as to bring a different part of
its coned surface to act on the roller of d.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said John Imray in the Great Sea! Patent Office on the
9th February 1883.
JOHN IMRAY of N° 28 Southampton Buildings Chancery Lane in the County of
Middlesex IMPROVEMENTS IN APPARATUS APPLICABLE TO SEWING MACHINES FOR
BUTTON HOLE AND OVERHEAD STITCHING A Communication to me from Abroad
by Mess Grimme Natalis & Co of Brunswick in the German Empire
This invention relates to apparatus which can be applied to sewing machines
for effecting button-hole or overhead stitching. The nature of this apparatus will
be understood from the accompanying drawings: Fig. 1 shewing a plan, Fig. 2 &
side view and Fig. 3 an end view of the arm of a sewing machine with the apparatus
attached thereto, Fig. 4 shewing the feed plate and needle hole through it and
Fig. 5 being a cross section shewing to an enlarged scale the part marked k. On
the horizontal spindle within the arm of the machine is fixed a bevil pinion a
gearing with a bevil wheel b of double the diameter mounted on a bracket of the
arm. On the axis of b a coned cam c is fixed by a set screw by which it can be
adjusted to or fro so as to bring a larger or smaller part of the cone of the cam to
act on a roller mounted on a sliding bar d which is pressed towards the cam by a
spring f, so that by the action of the cam and spring a to and fro motion is
imparted to the bar d. To this bar is attached the double yoke e e which embraces
the needle bar g, so that this can receive a lateral to and fro motion from the bar d,
while by the connection of the needle bar g with the needle slide h, by means of
the pin the vertical motion of the slide is also imparted to the needle. Between
the collar m and the abutment n is mounted a lever k which in the position I
(Fig 5) holds the needle at its farthest extreme in the slide h towards the front so
that it always descends through the hole o of the feed plate the cam c being in that
case ineffective. When the lever k is raised to the position II the bar d with the
needle bar is permitted to make half its stroke backwards, so that the needle
descends alternately through o and p making a series of short zig-zag stitches.
When k is raised to the position III, the bar d with the needle bar can make its
full stroke so that the needle descends alternately through o and q making a series
of long zig-zag stitches. The to and fro movement of the needle and consequently
the length of the zig-zag of a stitch can be varied by moving the cam c along its
axis so as to bring a different part of its coned surface to act on the roller of d.
The slide h receives only vertical motion in the usual manner by the known
mechanism indicated by dotted lines, the pin i by which it imparts its motion to
the needle bar, being at the same time free to slide laterally in the slots of the
slide. The needle bar, while it receives lateral motion from the yoke e e is at the
same time free to slide up and down in the same, the yoke thus acting as the guide
for its vertical motion.
Having thus described the nature of this invention and in what manner the
same is to be performed as communicated to me by my foreign correspondents, I
claim in respect of machines for button hole or overhead sewing:
First. In combination with a needle bar receiving only lateral to and fro motion
within a needle slide which receives only vertical motion, the yoke e e receiving
lateral motion from suitable mechanism and imparting such motion to the needle
bar, while at the same time it acts as a guide to the vertical motion thereof,
substantially as herein described.

page_text: Second. The use for imparting lateral to and fro motion to the needle bar, of the
adjustable cam c, bar d, and spring f, operating in combination with the lever k,
whereby the lateral motion of the needle bar is stopped or regulated substantially
as herein described.
In Witness whereof I the said John Imray have hereunto set my hand
and seal this ninth day of February in the year of our Lord One thousand
eight hundred and eighty-three.
JOHN IMRAY (L.S.)