Improvements in Sewing Machines for Producing Ornamental Whip-stitching.
Year: 1890

page_text: Date of Application, 28th Jan., 1890-Accepted, 1st Mar., 1890
COMPLETE SPECIFICATION.
Improvements in Sewing Machines for Producing Ornamental
Whip-stitching.
We, CARL OSWALD MÜLLER and ERNST MORITZ BACH of Burgstädt in the
Kingdom of Saxony, Empire of Germany, Manufacturers, do hereby declare the
nature of this invention and in what manner the same is to be performed, to bo
particularly described and ascertained in and by the following statement:
The object of this invention is an improved device, in sewing machines, for
producing ornamental whip-stitching as particularly occurs in the manufacture of
gloves.
Said whip-stitching has hitherto been produced by causing the cloth to so pass in a
folded state through between two feeding disks as to allow the needle to pierco the
cloth two-fold, the catcher thread laid over the cloth lap being sewn fast and forming
on the glove the whip-stitching.
The above mode of producing the said stitching is subject to various drawbacks
which are intended to be obviated by the improved contrivance.
Reference being had to the accompanying drawing,
Fig. 1 is a lateral view and partial section of the essential constituents of the
improved device ;
Fig. 2 illustrates the same in front view and partial section;
Fig. 3 shows the position of said parts during the feeding of the cloth ;
Figs. 4 and 5 illustrate the old method referred to above, s¹² indicating the feeding
disks, n the needle and t the cloth ;
Figs. 6 to 9 show the mode of producing the whip-stitching by means of the
improved device, and
Fig. 10 the finished stitching, the thread layers being represented as somewhat
drawn out.
The improved device operates as follows:-
The glove, prior to being sewn together, is guided through, with the inside at the
top, under a cloth presser a, which presses with its median rib a' the cloth t into a
groove b, Figs. 1, 2 and 3 ; thereby the cloth is folded round to be pierced two-fold
by the needle n Fig. 2.
As shown in Fig. 6, the catcher d, as seen from below, catches, after having pierced
the cloth, between the needle n and the thread " thereof.
Fig. 7 illustrates in perspective view, with the omission of the cloth to be sewn and
of all the covering parts, the relative position of needle, catcher and threads when the
needle occupies its extreme left-hand position and the cloth is shifted on by the length
of a stitch. On the catcher d attaining likewise its extreme position, a thread
carrier e raises the catcher thread f sufficiently as to allow the needle to pass with
the next stitch underneath said thread as illustrated in Fig. 8.
Fig. 9 shows the relative position, occupied by the needle, threads and catcher,
when the catcher has arrived in its reverse extreme position and the thread of the
previously formed loop is drawn fast. Hence the operation of the catcher, as shewn
in Fig. 6 is, repeated.
While the cloth is being fed on, the feeder c lifts the cloth presser out of the
groove b, thereby freeing the cloth and allowing the feeding to be continued.
Having now particularly described and ascertained the nature of this inven-
ion and in what manner the same is to be performed, we declare that what we
laim is
A sewing machine for producing ornamental whip-stitching, in which the cloth is
ressed by the cloth presser a into a correspondingly shaped groove lying in the

page_text: direction of the seam, and thereby so laid as to allow the needle n to pierce it with
each stitch two-fold, and the catcher d to lay the thread over the cloth lap,
substantially as set forth.
Dated this 28th dox of Tanu 1000
CARL OSWALD MÜLLER
ERNST MORITZ BACH
Per Huelser & Co.,
142, Fleet Street, London, Attorneys.