Improvements in Embroidery Machines.
Year: 1893

page_text: Date of Application, 21st Feb., 1893
Complete Specification Left, 21st Nov., 1893-Accepted, 6th Jan., 1894
PROVISIONAL SPECIFICATION.
Improvements in Embroidery Machines.
We, EMILE CORNELY and ROBERT CORNELY of 87 Faubourg St. Denis, Paris,
France, Manufacturers of Sewing Machines do hereby declare the nature of this
invention to be as follows :-
This invention relates to improvements in overseaming machines.
In the machines hereinafter described the seam on the upper face of the cloth
may be produced in the manner described in Specification to our Letters Patent
No. 16937 of 1888, or in the Specification to our Letters Patent No. 1705 of 1891.
On the accompanying drawing-
Fig. 1 shows the mechanism described in Specification to Letters Patent
No. 1705 of 1891, for producing the seam on the upper face of the cloth by means
of a revolving thread carrier C which winds its thread, around two seams of
parallel chain stitches.
For producing the seam on the under side of the cloth we employ a looper Z
which is provided with suitable holes (Figs. 11 and 12) or tubular guides a, b,
(Figs. 5, 6, 7, 9 and 10) for the passage of its two threads. c, d. Said looper is
provided with a hollow shaft O through which the threads are passed and receives
an oscillating motion of half a turn by the action of a screw rack F' on the screw
gear F (Figs. 1 and 2).
When the needle hooks A of the machine are in their lowest position
(Figs. 5, 6, 7 & 11) the blades G advance towards them and push the threads into
the hook needles A, which then rise with their thread loops above the cloth and
deposit thereon two rows of chain stitches.
While the needle hooks are above the cloth the looper Z makes half a revolution
whereby the threads c, d, are crossed (Fig. 10) and then the operation of the
blades G is repeated and thus two rows of chain stitches are produced on the
upper face of the cloth the threads of which chain stitches are crossed on
the lower side of the cloth and thus effect a solid binding on the said lower
face, while the binding on the upper face of the cloth is effected by means of the
thread which is wound around the chain stitches by means of the revolving thread
carrier C as described in Specification No. 1705 of 1891.
The oscillating motion of the looper shaft F is effected in the following manner;
A pinion H (Figs. 1 and 4) is secured on the main shaft E of the machine and
drives a pinion K of double its size which by means of a cam L (Fig. 4) actuates
pitman, lever 6, rod N and screw rack F' which latter acts upon screw pinion F
(Figs. 1 and 2) of looper shaft O and imparts to the looper Z half a turn at each
revolution of the machine whereby its threads c, d are crossed at each stitch.
The motion of the blades G is effected by means of a pinion g which has the
same diameter as pinion H, pitman h lever i, rods k and slide D which operates the
blades G in the same manner as shown and described in Specification No. 2483
of 1882 and shown again on the present drawing at Figs. 1, 2 and 3.
Figs. 13 and 14 represent arrangements for adjusting the motion of the blades
so that they may supply more or less thread to the needle hooks.
The small friction roller u which is secured to the lever U and which is operated
by means of the slide D is set upon an eccentric pin or shaft m which can be
turned by means of its toothed head n and thus the motion of lever U can be made
shorter or longer as well as that of the blades.

page_text: It is evident that on the machine above described the overseaming work can be
produced in all directions by means of the universal feed which is governed by the
crank handle R of the machine.
Dated this flat low of Lah 1002
"
COMPLETE SPECIFICATION.
Improvements in Embroidery Machines.
We, EMILE CORNELY, and ROBERT CORNELY, of 87 Faubourg St. Denis,
Paris, France, Manufacturers of Sewing Machines, 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 improvements in overseaming machines and its principal
object is the production of the overseaming work in all directions by means of the
universal feed governed by the crank handle of the machine.
In the machine hereinafter described the seam on the upper face of the cloth
may be produced in the manner described in Specification to our Letters Patent
No. 16,937 of 1888 or in the Specification to our Letters Patent No. 1705 of 1891.
On the accompanying sheet of drawings Figure 1 shows the mechanism described
in Specification to Letters Patent No. 1705 of 1891, for producing the seam on the
upper face of the cloth by means of a revolving thread carrier C which winds its
thread around two seams of parallel chain stitches.
'
For producing the seam on the underside of the cloth we employ a looper Z
which is provided with suitable holes or tubular guides a, b (Figures 6 to 14) for
the passage of its two threads c, d. Said looper is provided with a hollow shaft O
through which the threads are passed, and receives an oscillating motion by the
action of a screw rack F on the screw gear F (Figures 1 and 2).
When the needle hooks A of the machine are in their lowest position (Figures 7
and 9) the blades G advance towards them and push the threads into the hook
needles A, which then rise with their thread loops above the cloth and deposit
thereon two rows of chain stitches.
While the needle hooks are above the cloth the looper Z makes a revolution
whereby the threads c, d are crossed (Fig. 9) and then the operation of the blades G
is repeated and thus two rows of chain stitches are produced on the upper face of
the cloth, the threads of which chain stitches are crossed on the lower side of the
cloth and thus effect a solid binding on the said lower face, while the binding on
the upper face of the cloth is effected by means of the thread which is wound
around the chain stitches by means of the revolving thread carrier C as described
in Specification No. 1705 of 1891.
The oscillating motion of the looper shaft O is effected in the following
manner :-
.
A pinion H (Figures 1 and 4) is secured on the main shaft E of the machine and
drives a pinion K of double its size which by means of cam L (Fig. 4) actuates
pitman, lever 6, rod N and screw rack F', which latter acts upon screw pinion F
(Figs. 1 & 2) of loopershaft O and imparts to the looper Z a half turn at each
revolution of the machine, whereby its threads c, d are crossed at each stitch.
The motion of the blades G is effected by means of a pinion g which has the
same diameter as pinion H, pitman h, lever i, rod k and slide D which operates the
blades G in the same manner as shewn and described in Specification No. 2483 of
1882, and shewn again on the present drawings at Figs. 1, 2 and 3.
Figure 5 represents an arrangement for adjusting the motion of the blades s●
that they may supply more or less thread to the needle hooks.

page_text: The small friction roller u is set upon an eccentric pin of shaft m, which is
adjusted within a suitable bearing in lever U which is operated by means of slide D.
Shaft m. can be turned by means of its toothed head n and thus the friction
roller u which reaches into a suitable groove of slide D can be adjusted so as to
lengthen or shorten its stroke and thereby the motion of the lever U as well as that
of the blades G can be made shorter or longer.
As described in No. 2483 of 1882 the motion. of the blades G is effected by
means of the lever U, sleeve V, lever X and slide Y (Fig. 2) to which latter the
blades are secured.
This same slide Y can also be employed for producing the above described cross
stitch on the underside of the material without the employment of the blades G.
In this case the head Z of the looper is hinged to the hollow looper shaft O by
means of the studs p (Figs. 10 to 14), and after the looper Z has made its
oscillation for crossing its threads, its head is pivotted on the studs p towards the
needle hooks A (Fig. 11) which upon rising pull up their thread loops as above
described. This motion of the looper head Z (Figs. 10, 11, 12, 13 and 14) is
effected by the slide Y which has a circular opening into which the lower part of
the hinged looper head Z extends, and which is thus at the right. moment moved
forward and backward as above described.
It is evident that the mechanisms herein described for producing this cross stitch
can be turned by the crank handle Q in conformity with the universal feed of the
machine, and therefore the overseaming work can be produced in all directions.
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 production of an overseaming stitch as herein described, in all directions
by means of the universal feed consisting of two chain stitches on the upper side of
the material the threads of which are crossed on the underside by means of an
oscillating looper Z and are hooked into the needle hooks for the production of the
next following stitch.
Dated this Twenty-first day of November 1893.