Improvements in Edging Machines.
Year: 1894

page_text: Date of Application, 10th July, 1894
Complete Specification Left, 7th Mar., 1895-Accepted, 13th Apr., 1895
PROVISIONAL SPECIFICATION.
Improvements in Edging Machines.
We, EMILE CORNELY, and ROBERT CORNELY, both of No. 87 Faubourg
St. Denis, in the City of Paris, France Manufacturers of Sewing Machines, do
hereby declare the nature of this invention to be as follows:—
In the edging machines which work with two needles for the production of two
parallel seams into which transversal threads are interlaced, the edging stitch has
the same width in the centre of the arcs as well as in the angles, as shown in
Fig..1. of the accompanying drawings.
.
The object of the present invention is the production of an edging stitch in
which the arcs present their largest width in their centre and become narrower
towards the angles, as shown in Fig. 2.
This is obtained in causing the distance between the needles to be varied during
the work automatically from the centre of the arcs to the angles of the arcs. Thus
an edging stitch is obtained which presents the same differences in width as the
edging stitch which is done by hand.
The two needles and their stitch producing organs can work according to any
system which will suit the improvements hereafter described, such for instance the
systems of edging machines described in Letters Patent No. 16937, of 1888,
No. 1705 of 1891, No. 1441 of 1893, No. 3812 of 1893, the description of which
need not be repeated here.
Fig. 3 is an elevation and section of the improved machine, the other figures are
details on an enlarged scale.
The two needle bars A and B are operated by means of the heart slide and
their needles D pass through a nipple E; the needles D do not turn with the
crank bandle G which governs the feed of the machine, but they pass through the
central tube H upon which the parts I, K, L, M, of the universal feed are secured
in order to obtain a limited turning feed motion of about a quarter of a circle,
which feed is governed by the handle G by means of the cog wheels a, b, c, d, e, f, g,
and h, so as to produce the edging scallops without turning the material.
In order to obtain an edging stitch of smaller width in the angles as represented
in Fig. 2, it is necessary that the distance between the needles decreases in the
angles of the ares and increases in their centre, and this lateral motion of the
needles must be governed by the handle G in conformity with the feed of
the machine. For this purpose a cam m (Figures 4 and 6) is secured upon a
central piece N which is fixed in the interior of tube H as represented in
Figure 4 on an enlarged scale; the needle bars A and B pass through cam m, and
when this cam is turned by handle G it causes the needle bars A and B to come
nearer together; in its backward motion the cam m releases the needle bars which
are then pushed away from each other by the action of springs p, which are fixed
upon central part N. The cam m is so arranged that the distance between the two
needles is always proportional to the angle described by the handle G, and this
motion can be regulated with the greatest accuracy.
The needles D are allowed to play freely in the slots of nipple E (Figure 8) and
the needle plate in the table of the machine is provided with similar slots for the
passage of the needles.

page_text: Figure 5 represents a section through central tube H which shows the central
part N which cam m and springs p are secured. The cam m can also be fixed
upon
in tube H.
Figure 7 represents a disc 9 secured in nipple-tube o; this disc is provided with a
straight slot, and as nipple-tube o does not turn with the handle G, the needle-
bars A and B are guided in a straight line during their lateral motion when they
are operated by cam m.
Lin Touth day of 1, 1904
We, EMILE CORNELY and ROBERT CORNELY, both of No. 87 Faubourg
St. Denis in the City of 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:-
In the edging machines which work with two needles for the production of two
parallel seams into which transversal threads are interlaced, the edging stitch has
the same width in the centre of the arcs as well as in the angles, as shewn in
Figure 1 of the accompanying drawings.
The object of the present invention is the production of an edging stitch in
which the arcs present the largest width in their centre and become narrower
towards the angles, as shewn in Figure 2.
This is obtained by causing the distance between the needles to be varied during
the work, automatically from the centre of the arcs to the angles of the arcs.
Thus an, edging stitch is obtained which presents the same differences in. width
as the edging stitch which is done by hand."
The two needles and their stitch producing organs can work according to any
system which will suit the improvements hereafter described, such for instance as
the systems of edging machines described in Letters Patent No. 16,937 of 1888,
No. 1705 of 1891, No. 1441 of 1893, No. 3812 of 1893, the descriptions of which
need not be repeated here.
Figures 3 and 9 are a section and elevation respectively of the improved machine;
the other figures are details on an enlarged scale.
The two needle bars A and B are operated by means of the heart slide C and
their needles D pass through a nipple E; the needles D do not turn with the
crank handle G which governs the feed of the machine, but they pass through the
central tube H upon which the parts 1, K, L, M of the universal feed are secure!
in order to obtain a limited turning feed motion of about a quarter of a circle,
which feed is governed by the handle G by means of the cog wheels a, b, c, d, e, f,!,
and h. so as to produce the edging scallops without turning the material.
In order to obtain an edging stitch of smaller width in the angles as represented
in Figure 2, it is necessary that the distance between the needles decreases in the
angles of the arcs and increases in their centre and this lateral motion of the
needles must be governed by the handle G in conformity with the feed of
the machine. For this purpose a cam m (Figs. 4 and 6) is secured upon a central
piece N which is fixed in the interior of tube H as represented in Figure 4 on an
enlarged scale; the needle bars A and B pass through cam m and when this cam is
turned by handle G it causes the needle bars A and B to come nearer together;
in its backward motion the cam m releases the needle bars which are then pushed

page_text: away from each other by the action of springs » which are fixed upon central
art N. The cam m is so arranged that the distance between the two needles is
always proportional to the angle described by the handle G and this motion can
be regulated with the greatest accuracy.
The needles D are allowed to play freely in the slots of nipple E (Fig. 8) and
the needle plate in the table of the machine is provided with similar slots for the
passage of the needles.
in tube H.
Figure 5 represents a section through central tube H which shews the central
part
N upon which cam m and springs p are secured. The cam m can also be fixed
Figure 7 represents a disc o secured in nipple-tube o; this disc is provided with
a straight slot, and as nipple-tube o does not turn with the handle G, the needle
bars A and B are guided in a straight line during their lateral motion when they
are operated by cam m.
Figure 9 represents an elevation of the head of the machine; a rod P is passed
between the two needle bars A and B down through the central tube H and can be
screwed into the small piston n which plays within the hollow nipple E. A pin
is secured by means of a traverse to the piston n and plays up and down alongside
one of the needles D. The up and downward motion is communicated to the
piston n and to its pin by means of cam r of the main shaft O which at each
turn lifts rod t and its transversal bar Q to which rod P secured by set screw u;
The action of the
while the downward motion is made by the action of spring w.
supplementary pin æ in conjunction with the needles D and with the oscillating thread
carrier F permits of a very easy and regular motion of the latter whereby the
speed of the machine can be much increased. When the two needle hooks D work
with a single thread by the action of a single oscillating looper below the cloth plate
they will produce the two-chain stitch seams y (Fig. 10) which are connected
below the cloth by their transversal threads Z represented in full lines Fig. 11, and
which latter presents a highly ornamental embroidery seam in which a cord or
braid may also be introduced by one of the well known cording or braiding guides
in the cloth plate.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is:-
In edging machines working with two needles, an appliance which is governed by
the crank hundle of the machine, and which according to the direction of the feed,
varies the distance between the needles, for the purpose of producing an edging
stitch, which presents a wider edging seam in the centre of the arcs than in their
angles.
'
Dated this Seventh day of March 1895.