An Apparatus for Producing Straight Ornamental Seams by the Whip Stitch Sewing Machine.
Year: 1890

page_text: Date of Application, 12th Nov., 1890
Complete Specification Left, 12th Aug., 1891-Accepted. 3rd Oct.
1801
по SIONAL SPECIFICATION.
An Apparatus for Producing Straight Ornamental Seams by the
Whip Stitch Sewing Machine.
I, BERNHARD KÖHLER of Chemnitz, in the Empire of Germany, Manufacturer,
do hereby declare the nature of this invention to be as follows:-
:-
The object of this invention is an apparatus intended to so pass the cloth through
the sewing machine as to produce an ornamental stitching of certain width,-which
latter is dependent only on the mode of clamping in-without any influence on the
part of the sewing person.
The improved apparatus is essentially disposed as follows:
In a prismatic rail secured to the sewing machine is shifted a pair of pincers
by means of an angle piece attached to one shank of the latter.
piece is secured a toothed bar, into which gears a pinion mounted on the trans-
To the angle
port shaft, whereby the pincers are guided along under the needle while they
are prevented from ascending by a collar or projection provided on top of the
pinion and overlapping the angle piece. When the device is being used, an
intermediate rail secured with one arm on the pin or pivot of the pincers, is
laid against the stationary one of the shanks of the pincers, after the cloth has
been shifted on said rail. Subsequently the movable shank of the pincers is
moved onto the rail and the whole compressed by fly nut or other suitable
levice so that a portion of the cloth corresponding to the width of the rail
rojects. The pincers thus extended are then shifted on the rail until the pinion
cizes the rack bar. The machine now set in motion penetrates with its needle
he protruding portion of the cloth thereby producing a whip stitch seam
hereon. The width of the seams to be produced depends on the size of rail
mployed.
Or the stationary part only of the pincers may be provided which is at top
ent round to an angle having a slot equal in shape and size to the glove
rket to be made. The rail is shaped according to the slot and its arm is
ounted on a cam provided with crank, by means of which the rail can be
essed into the slot, so that the upwardly projecting cloth portion can be
netrated by the needle in the same manner as mentioned above.
Dated this 12th day of November 1890.
HUELSER & Co.,
Agents for Applicant.
COMPLETE SPECIFICATION.
An Apparatus for Producing Straight Ornamental Seams by the
Whip Stitch Sewing Machine.
I, BERNHARD KÖHLER of Chemnitz, in the Empire of Germany, Manufacturer,
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 whip stitch sewing machines and has for its purpose to
provide an apparatus serving to so pass the cloth through the sewing machine as to
produce an ornamental stitching of a certain width dependent only on the manner
of clamping in,without any influence on the part of the sewing person.
Referring to the accompanying drawing
Price 1

page_text: Fig. 1 is a side view and partial section of the apparatus in connection with the
sewing machine.
Fig. 2 is a view of the apparatus from the machine and partial section.
Fig. 3 shows the intermediate piece / determining the width of seam.
Fig. 4 is a side view of another clamping-in device.
Fig. 5 a plan and
Fig. 6 a section thereof.
On the prismatic rail 6 secured to the sewing machine is placed a pair of
pincers c¹² by means of an angle piece d secured thereto. To said angle piece is
fixed a rack bar e, into which gears the toothed wheel or pinion g mounted on the
transport shaft f, whereby the pincers c¹² are guided along under the needle n,
while the rim or collar of pinion g prevents the pincers from ascending.
The apparatus is used as follows:-
The intermediate rail mounted with its arm on the hinge pin t, after the cloth
is shifted on said rail, is laid onto the stationary shank c¹ of the pincers. Subse-
quently the movable shank c² of the latter is laid onto the rail and the whole is
compressed by turning the fly nut m or by means of any other suitable contrivance,
so that a part, corresponding to the width of the rail-of the cloth projects.
Subsequently the pincers thus prepared are shifted on the rail & until the transport
pinion 9 seizes the rack bar e. The machine when now actuated penetrates with
its needle the projecting part of the cloth and produces thereover a whip stitch
seam.
g
For seams of different width weaker or stronger rails are inserted.
In the form of application shewn by Figs. 4, 5 and 6, only the stationary part of
the pincers is employed which is at the top beut round to an angle, in which is
provided a slots having the shape and size of the seam to be produced, Fig. 5.
The arm of rail * which is shaped corresponding to the slots is mounted on a
cam provided with crank k, by means of which the rail can be pressed into the
slots Figs. 5 and 6, so that in the same manner as described above, the upwardly
projecting cloth can be penetrated by the machine needle with the advantage that
the seam can be executed in certain figures, Fig. 5.
In order to demonstrate that the clamping-in device does not hinder the sewing
on the whip stitch sewing machine, the sewing tools of such a machine with the
clamping-in apparatus of my invention in the principal positions they occupy during
sewing, are represented on an enlarged scale.
It is easily understood that the circle needle of Rudolph's machine or of similar
machines as always standing above the straight horizontally working sewing needle,
is not hindered in its work by the clamping-in device which lies with all its parts
below the needle. For this reason I have in this case taken in consideration a
machine, in which the catcher performs also an up- and down-movement.
Fig. 7 shows the positions of the sewing tools at the moment the catcher v has
entered the loop s produced by the needle n. Subsequently the needle recedes so
far as to leave the cloth; the catcher v lays the needle loop hanging thereon over
the rounding formed by the cloths, and the clamping-in device proceeds with the
clamping-in cloth piece for the length of a stitch, Fig. 8. The catcher v now moves
so far down, that the needle moves over the catcher thread e as shewn by Figs. 94 98
and 9c in plan, front view and side view respectively.
The catcher v now releases the needle thread n¹ and places itself again on the
outer side of the cloth rounding st, while the needle n moves so far through the
cloth that it has pulled-on the previous stitch Fig. 10. Subsequently the work
recommences in the manner described above.
Having now particularly described and ascertained the nature of this inven
tion and in what manner the same is to be performed, I declare that what I
claim is :-
An apparatus for producing rectilinear ornamental seams on the whip stitch
sewing machine, consisting of a pair of pincers c¹l c² or c¹× 1× which are moved

page_text: rectilinearly and intermittently along under the needle and between the parts c³ / c²
or cx of which the cloth is so clamped in as to be penetrated two-fold by the
needle n, whereby a whip stitch seam is formed, the width of which depends on the
size of rail or * substantially as set forth.
Dated this 12th day of August 1891.
BERNHARD KÖHLER.
By Huelser & Co.,
His Agents.