Sewing for Producing Ornamental or Surface Stitching.
Year: 1887

page_text: Sewing for Producing Ornamental or Surface Stitching.
I, BRUNO RUDOLPH, of 34 Haide Strasse Berlin, German Empire, 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 sewing machines producing what is known as "overhead
sewing, in which the fabric is intermittently fed forward by two feed discs or
cylinders, between which the fabric passes; the present invention has for its object
the production of ornamental or surface stitching of any desired width, suitable for
the backs of gloves and for other purposes, irrespective of the description of stitch
employed.
The accompanying drawings shew the arrangement of the apparatus as applied to a
construction of overhead sewing machine similar to that described in my previous
patents Nos. 5330 of 1884 and 6414 of 1887.
Fig. 1 shews a side view of the complete machine, Fig. 2 a front view, Fig. 3 a
front view of the apparatus to an enlarged scale, Fig. 4 a plan of the same, Fig. 5 a
sectional side view, Fig. 6 a sectional plan on line W W Fig. 5, and Fig. 7 a vertical
section on line V V Fig. 2.
The feed discs or cylinders R R have imparted to them an intermittent rotary
motion in the known manner from the shaft A by means of the worm M and worm
wheel N, the shaft of which drives the shaft m of feed disc R through bevil gear ii,
and the shaft m drives the shaft m' in the contrary direction through the spur
gearing p p². The shaft m¹ is mounted in the known manner with spring hinge-
joint S, so that the feed disc R' can be moved away from disc R by means of a
lever V for the purpose of introducing the fabric between them. The spring T acting
on the lever V presses the disc R¹ against R.
For producing ornamental or surface stitching of any desired width on the backs of
gloves, or on other fabrics, a disc S of any desired thickness is introduced between the
two feed discs R, R¹ and can revolve upon a pin s carried by the adjustable angle
bracket a, so that on the rotation of the discs R R¹ the disc S is carried round by

page_text: frictional contact therewith, the requisite pressure for this purpose being given by
the spring T.
The fabric So to be sewn being placed on the edge of the disc S, is led thereby
between the feed discs R, R', thus presenting a certain width of material between
these corresponding to the thickness of the edge of the disc S.
is
For more easily guiding the fabric or material So on to the disc S a guide
provided, carried by a standard to, on which it can be adjusted in height by the
screw t¹.
It will be seen from the above described arrangement that the width of the stitching
on the face of the fabric, may be varied by employing discs S of different thicknesses,
the disc being readily removed from the standard a and replaced by another.
In place of a disc S may be used a straight bar made to travel in a rectilineal
direction between suitable guides.
Having now particularly described and ascertained the nature of this invention and
in what manner the same is to be performed, I declare that what I claim is :—
In combination with machines for overhead sewing in which the fabric or material
to be sewn is fed between two feed discs or cylinders, the use of a disc or bar situated
between the feed discs and made to travel therewith, over the edge of which disc or
bar the fabric is laid in order to produce stitching thereon the width of which may
be varied according to the thickness of the disc, or bar, substantially as herein
described.
Dated this 14th day of October 1887.
ABEL & IMRAY,
Agents for the Applicant.