Improvements relating to Thread Cards or Bobbins.
Year: 1893

page_text: Date of Application, 6th June, 1893
Complete Specification Left, 5th Mar., 1894-Accepted, 2nd June, 1894
PROVISIONAL SPECIFICATION.
Improvements relating to Thread Cards or Bobbins.
I, FELIX SYHRE, Merchant, of 13 Pfaffendorferstrasse, Leipzig, in the
Kingdom of Saxony, do hereby declare the nature of this invention to be as
follows:-
This invention relates to thread cards or bobbins made from cardboard, paper
or other sheets, and has for its object, to produce a cheap bobbin for sewing
machine and other thread, which is composed of a cylindrical tube or round core
and flat wings or sides, and can therefore be easily placed on a revolving spindle
while being little heavier than ordinary flat thread cards.
The raw material for this bobbin is preferably a sheet of cardboard or other
suitable material, which is formed into the required shape by cutting or stamping
and folding. The sheet is first cut out or stamped and pressed, so as to resemble
an axial section of two round bobbins placed side by side with their flanges
touching each other or merging one into the other, and an axial cavity or semi-
circular groove is formed in the middle of each half (or section) by pressing on a
suitable disc or mould; subsequently the two halves are folded down or doubled
one upon the other, so that the two axial grooves or cavities cover each other
and form a tube, while the wings or sides remain flat, but have now twice their
previous thickness, and the middle or horizontal length (perpendicular to the axis
of the spool) is reduced to one half.
In order to thicken the tubular core which fits upon a revolving spindle, the
inaterial or trapezoidal blank between the upper and lower wing of each half
sheet, instead of being cut away, as before, may be allowed to remain, being
merely separated from the wings or flanged by a pair of cuts, while hanging
together with the concave core along the top of the trapeze which forms the said
blank, and after the two half sheets have been folded, so as to form the bobbin,
the said blanks are bent down upon the tubular core, so as to form part of the
same.
The two halves of the flat bobbin may be permanently glued together, after
folding, or they may be merely held together by the sewing thread, wound upon
the bobbin.
If the new kind of spool or bobbin is made of plastic material, instead of
cardboard, it need not be composed of two halves, but may be moulded or stamped
directly into the required shape (an axial tube with flat wings at each end) by
casting, or pressing with suitable moulds. Or the tubular core may be situated
on one face of the wings, the latter being approximately tangential to the tube
and the required shape being produced by bending.
Dated this 5th day of June 1893
FAIRFAX & WETTER,
Agents for the Applicant.

page_text: Improvements relating to Thread Cards or Bobbins.
I, FELIX SYHRE, Merchant, of 13 Pfaffendorferstrasse, 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 :-
The objects of the present invention are peculiarly formed thread-cards or
bobbins, so formed as to be adapted for placing upon a spool-spindle.
With the thread-cards until now in use it was not possible to place them
rotatably, in order to unwind the thread upon the same, from which circumstance
thread-cards have now almost entirely dropped out of use.
These thread-cards are manufactured as follows. The parts forming the
bobbin are, in spread out condition, cut or stamped out of card-board, paper or
other suitable material. Then semi-circular grooves are pressed in them.
U pon
the thread cards being now folded or laid together these semi-circular cavities or
grooves form a tube by means of which the thread-card can be placed upon a
spindle.
In the accompanying drawing
Fig. 1 shews the bobbin parts in spread out condition.
Fig. 2 shews a cross section of the same on the line M-M of Fig. 1.
After the form has been stamped out the grooves c and d are pressed in, the two
parts A and B laid one upon the other (Fig. 3), and then they may be glued or
fastened together in other suitable manner, so that the tube f is formed, (Fig. 4).
In order to form a particularly large spool-tube, upon stamping out of the
single parts the wings or flanges g and h (Figs. 5 and 6) may be left on the parts A
and B and only separated from them by cuts. Upon laying together of the two
halves, the wings g and h are folded around the spool-tube and secured to the
same in suitable manner.
A thread-card formed in this way is shewn in Figs. 7 and 8 in front-view and
section respectively.
The thread-cards can also be so manufactured that the two parts instead of
being connected one along side of the other, are connected together one at the
top end of the other (Fig. 9). The two parts A and B have an opening in the
groove of the tube at the place of folding, in order, upon laying together of
the thread-card, to enable it to be placed upon the spindle.
If desired, several thread-cards, whether connected together as just described,
or sidewise, can be grooved and stamped out of one piece, (Fig. 10).
The bobbin can also be made out of plastic material, such as papier machee
for instance by casting or moulding, in which case the side parts are cast onto the
tube (Figs. 11 and 12).
The tube on the bobbin can also be formed at the side. (Fig. 13).
For securing the beginning of the thread a small slit i may be stamped in the
card and the thread squeezed into it.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is
1. Bobbin for reception of spinning thread, so characterized that the parts A4
and B stamped out of card-board, paper or other suitable material, and folded
together, with the grooves c and d pressed in the same, form a tube for placing
on the spindle, whereby wings g and ½ can be arranged and fastened on the outside
around the spool-spindle-tube.

page_text: 2. The bobbin claimed in Claim 1, so characterized that it is made in desired
forms in one piece out of a plastic substance-paper machee or the like (Figs. 11
and 12.)
3. The bobbin claimed in Claim 1, so characterized that the tube f serving for
reception of the spindle is formed at the side.
4. In the bobbin claimed in Claims 1 to 3 the arrangement of a small slit for
fastening the beginning of the thread.
Dated this 2nd day of March 1894.
FELIX SYHRE,
By Doctor Joh. Schanz.