AN IMPROVED CONSTRUCTION OF THREAD BOBBINS OR WINDERS FOR SEWING-MACHINES AND OTHER PURPOSES
Year: 1881

page_text: LETTERS PATENT to Gerard Wenzeslaus von Nawrocki, Proprietor of the
Firm of J. Brandt and G. W. v. Nawrocki, Patent Solicitor and Civil Engineer,
of 124, Leipziger Strasse, Berlin, Germany, for an Invention of "AN IMPROVED
CONSTRUCTION OF THREAD BOBBINS OR WINDERS FOR SEWING-MACHINES
AND OTHER PURPOSES." A communication from August Engisch, of the
Firm of Aug. Engisch & Co., of Basle, Switzerland.
PROVISIONAL SPECIFICATION left by the said Gerard Wenzeslaus von
Nawrocki at the Office of the Commissioners of Patents on the 4th July
1881.
GERARD WENZESLAUS
VON NAWROCKI, Proprietor of the Firm of J. Brandt
and G. W. v. Nawrocki, Patent Solicitor and Civil Engineer, of 124, Leipziger
Strasse, Berlin, Germany. "AN IMPROVED CONSTRUCTION OF THREAD BOBBINS
OR WINDERS FOR SEWING MACHINES AND OTHER PURPOSES." [A communication
from August Engisch, of the Firm of Aug. Engisch & Co., of Basle, Switzerland.]
According to the present Invention, in place of the ordinary construction of
cylindrical bobbin for winding thread, a flat bobbin or winder is constructed as
follows:-
Two pieces of flat cardboard, paper, or other suitable material are stamped or cut
to a configuration presenting a middle part having straight parallel sides, and
provided with projections on either side at each end, and each piece is then
stamped in a die so as to form a semi cylindrical groove extending along its middle
parallel with the straight sides. The two pieces are then secured together by
cementing or otherwise, so that the two semi cylindrical grooves form together a
cylindrical hole extending along the bobbin, the outer flat surface of which
consequently has a corresponding semi-cylindrical projection on each side.
By means of the said cylindrical hole the flat bobbin can be then mounted on a
spindle to have thread wound upon it, and be afterwards placed on the pin of a
sewing machine in a similar manner to ordinary bobbins.
לn

page_text: The cementing together of the two parts may be effected under pressure, and a
tongue may be formed therein by slitting, by means of which the one end of the
thread is secured.
If desired several such fat bobbins may be formed in one continuous length, that
is to say, there may be a series of parts with straight parallel sides, between each
two of which are formed projections, the thread being either wound separately on
each straight part, or continuously upon each in succession, and the several bobbins
may then be separated for use by cutting transversely through the intermediate
parts where the projections are.
Instead of being formed of two separate pieces secured together as described,
such flat bobbins with cylindrical hole may also be produced by moulding or
casting, for which purpose paper pulp or any other suitable known material may be
used that can be moulded or cast in a liquid or semiliquid state, and that will then
harden.
The advantages of these flat bobbins are that they are cheaper than ordinary
cylindrical bobbins, that they require no labels, the quantity, &c., being printed on
the bobbin itself, that the thread is wound on them at a less cost, and that they
cost less for transport. They also afford greater security to the public against
fraud, as the quantity of thread actually contained on the bobbin is always
visible.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Gerard Wenzeslaus von Nawrocki in the Great Seal Patent Office on
the 2nd January 1882.
GERARD WENZESLAUS VON NAWROCKI, Proprietor of the Firm of J. Brandt
and G. W. v. Nawrocki, Patent Solicitor and Civil Engineer, of 124, Leipziger
Strasse, Berlin, Germany. "AN IMPROVED CONSTRUCTION OF THREAD BOBBINS
OR WINDERS FOR SEWING MACHINES AND OTHER PURPOSES." A communication
from August Engisch, of the Firm of Aug. Engisch & Co., of Basle, Switzerland.
According to the present Invention, in place of the ordinary construction of
cylindrical bobbin for winding thread a flat bobbin or winder is constructed as
follows:-
Two pieces of flat cardboard, paper, or other suitable material are stamped or cut
to a configuration, presenting a middle part having straight parallel sides, and
provided with projections on either side at each end, and each piece is then stamped
in a dic, so as to form a semi-cylindrical groove extending along its middle parallel
with the straight sides. The two pieces are then secured together by cementing
or otherwise, so that the two semi-cylindrical grooves form together a cylindrical
hole extending along the bobbin, the outer flat surface of which consequently has a
corresponding semi-cylindrical projection on each side.
By means of the said cylindrical hole the flat bobbin can be then mounted on a
spindle to have thread wound upon it, and be afterwards placed on the pin of a
sewing machine in a similar manner to ordinary bobbins.
The cementing together of the two parts may be effected under pressure, and a
tongue may be formed therein by slitting, by means of which the one end of the
thread is secured.
If desired several such flat bobbins may be formed in one continuous length, that
is to say, there may be a series of parts with straight parallel sides, between each
two of which are formed projections, the thread being either wound separately on
each straight part, or continuously upon each in succession, and the several bobbins
may then be separated for use by cutting transversely through the intermediate
parts where the projections are.
Instead of being formed of two separate pieces secured together as described,
such flat bobbins with cylindrical hole may also be produced by moulding or
casting, for which purpose paper pulp or any other suitable known material may
be used that can be moulded or cast in a liquid or semiliquid state, and that will
then harden.
The advantages of these flat bobbins are that they are cheaper than ordinary
cylindrical bobbins, that they require no labels, the quantity, &c., being printed on
the bobbin itself, that the thread is wound on them at a less cost, and that they
cost less for transport. They also afford greater security to the public against
fraud, as the quantity of thread actually contained on the bobbin is always
visible.
Figs. 1, 2, and 3 shew flat bobbins or winders, according to this Invention, of
several sizes in front view; Figs. 4, 5, and 6 are transverse sections of these; and
Fig. 7, 8, and 9 shew them with cotton or other thread wound on them. Each
consists of two pieces of cardboard or the like cut to the shape a, and stamped or
pressed so as to make the middle portion project in semi-cylindrical form. The
two pieces being then cemented together face to face form the bobbin or winder,
presenting a cylindrical hole along the middle, by which it can be placed on a
spindle or pin. A tongue c may be slit in either or both pieces to take the end of

page_text: the thread. Several of the bobbins may be formed in a continuous length, as
shewn in section and front view at Fig. 10, and with the thread wound on, as shewn
at Fig. 11.
Instead of employing two thicknesses of card a single thickness may be used, as
shewn in front view at Fig. 12, and in plan at Fig. 13; the card is slit at two
places, d, d; the part between the slits is bent to semicylindrical form in the one
direction, and the parts beyond the slits bent in the opposite direction. The
bobbin may be stiffened by giving its edges a cylindrical form, as shewn at Fig. 14,
this form being advantageous, as it gives a less abrupt bend to the thread wound
on the bobbin. Three or four pieces of card may be shaped and secured together,
so as to form triangular or quadrilateral bobbins, as shewn at Figs. 15, 16, and 17,
and other numbers of pieces might in a similar manner be united to form polygonal
bobbins. The central hole in such cases may be bushed, as shewn in Fig. 17, by a
piece of card e of cylindrical form.
Having thus described the nature of the said Invention, and in what manner
the same is to be performed, as communicated to me by my correspondent,
I claim,-
The construction of bobbins or winders for thread of cardboard or other suitable
material, shaped so as to present a central hole, substantially as and for the purposes
herein set forth.
In witness whereof, I, the said Gerard Wenzeslaus von Nawrocki, have
hereunto set my hand and seal, this Twenty-ninth day of December, in the
year of our Lord One thousand eight hundred and eighty one.
GERARD WENZESLAUS VON NAWKUUKI. (L.S.)