Sewing Machines.
Year: 1886

page_text: Sewing Machines.
I, WILHELM VON PITTLER, Manufacturer, of Gohlis-Leipzig, in the Kingdom
of Saxony, 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 :—
My invention consists in an attachment applicable to or designed for double
lockstitch sewing machines, which enables the same to produce embroideries from
an enlarged pattern by means of a pantograph.
In the accompanying drawings, Fig. 1 is a plan of a sewing machine table with
embroidering attachment embodying my invention.
Fig. 2 is a partial front view of the head or goose neck of a sewing machine
adapted for embroidering. Fig. 3 is a partial side elevation and section of the
same.
Fig. 4 is a cross section of the movable frame, holding the fabric on which the
embroidery is to be produced.
Fig. 5 is a longitudinal section of the said frame and its guide.
Figs. 6, 7, 8 and 9 represent a modification.
This apparatus consists essentially of a pantograph B, serving to diminish the
pattern A, a frame C, on which the fabric is stretched, an intermediate guide
piece D and a guide frame E.
By means of the pantograph B, constructed in the known manner, the pattern A
is transmitted in a reduced scale to the cloth, that is to say, the fabric stretched
over the cloth frame, and to be embroidered, is moved by means of the pan-
tograph B in such a manner; that every motion of the pattern needle or handle of
the pantograph produces a similar but proportionately reduced motion of the cloth
frame C. The cloth frame C is a rectangular or round frame, into which aro
inserted fine needles or pins a serving to hold the edges of the fabric to be
embroidered. The right side of the cloth frame C is extended and provided with
a slot C, in which are situated the small friction rollers d secured to the
intermediate guide piece D.
t
The intermediate guide piece D is adapted to slide to and fro on the guide
frame E by means of four friction rollers e. With the intermediate guide piece D

page_text: is also connected a strip f, which carries likewise two guide rollers g, which serve
to guide the cloth-frame C at its outer edge h. By guiding the cloth frame CC
by means of rollers d in the slots c and by means of rollers g at the outer edge h,
any back lash or dead-motion of the cloth frame may be avoided.
The guide piece E is a cut out and smooth sheet of metal, which is fixed to the
machine at m m. After use, this sheet with the intermediate guide piece D and
the cloth frame are removed, for allowing to do other work with the machine.
To allow the empty shuttle to be taken out, the side n of the cloth frame C is
made narrower than the other sides, and the cloth frame B with the pantograph is
shifted up to the position indicated by dotted lines, in which position the shuttle
can be removed without trouble.
To avoid that the necessary motion of the cloth frame or of the fabric by the
pantograph is prevented or impaired by the contact with the cloth-presser o, a pin p
is fixed in the cloth presser.
During the rise of the needle g, the cloth presser o is lifted by the grooved cam 8
secured to the needle bar r, whereby the fabric becomes free for being advanced.
When the needle bar r descends again, the cloth presser o falls down with it, in
consequence of the pressure of a spring contained in the same.
The cloth presser, however, may be set out of work or dispensed with. In that
case, to prevent the breaking of the needle, the motion of the cloth frame C is
retarded by means of a clipping device. For avoiding a rupture of the needle
thread; a yarn guide t is secured to the fulcrum of the lever u and takes as much
thread off the spool v, as is required for the unchecked displacement or feed motion
of the cloth frame B.
Figs. 7 and 9 show a modification. Instead of this intermediate guide piece D,
levers w ware applied, which guide the cloth frame B in the slots c by means of
friction rollers d, and to allow any required movement, a guide slot x is provided
in the guide piece E, in which slot the levers w are guided by means of a friction
roller y.
.
The control of the cloth-frame B by the pantograph, and the manner of
fastening the apparatus to the machine, is the same as with the above described
arrangement.
The process of embroidering is as follows:
After the cloth guide and then the apparatus has been suitably secured to the
machine, and the shuttle has been set, the pin p is inserted into the cloth presser o,
or the cloth presser is entirely set out of work. Subsequently an enlargement A of
the pattern to be embroidered is fastened to the sewing table in any convenient
manner, as shown by Fig. 1, and subsequently the object to be embroidered is
mounted in the cloth frame. This being done, the machine is set in motion, and
the pattern needle or point z of the pantograph is guided over the surface, so as to
follow the stitches printed or drawn on the pattern sheet A, which movement is
transferred by the pantograph in a diminished scale, but quite in the same manner,
to the cloth-frame B, that is to say to the fabric to be embroidered.
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:
•
0
1.) The application of a reducing pantograph for embroidering patterns by
means of lock-stitch sewing machines.
2.) An embroidering attachment to sewing machines, comprising a pantograph B,
cloth frame C, intermediate guide piece D, and guide frame E, substantially as
described.
3.) The combination of cloth-frame C, with intermediate guide piece D, provided
with rollers d and g for guiding the same.
4.) The combination of intermediate guide piece D, with guide frame E, provided
with rollers e for guiding the piece D.

page_text: 5.) The combination of needle bar r, with guide lever n adapted to be turned by
the up and down motion of the bar r, and with a yarn guide t mounted on the axle
of the lever n, substantially as and for the purpose described.
'
6.) The combination of needle bar r, with slotted cam s attached to the same,
and cloth presser o having a pin or projection p adapted to be raised by the cam 8,
substantially as and for the purpose described.
7.) The mechanism for guiding the cloth frame C, chiefly comprising the
levers w, friction rollers d, and guide frame E.
The whole substantially as described and illustrated.