Improvements in the Carriages of Lace-making Machines.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
Improvements in the Carriages of Lace-making Machines.
I, PAUL MORITZ SCHIERSAND, of Kappel, near Chemnitz, in the Kingdom of
Saxony, German Empire, Director, do hereby declare the nature of this invention
to be as follows:-
My present invention relates to a new shuttle for weaving net-lace and curtains
and has for its object an improved arrangement, whereby the strain of the shuttle
thread is automatically regulated in such a manner, that the strain, increasing
as the diameter of the thread windings decreases, is utilized to diminish the
friction of the shuttle. According to the invention this is gained by leading
the thread through an eye of the spring pressing against the shuttle, so that with
increasing tension, the spring is accordingly drawn back.
In order that this invention may be more clearly described, reference is made
to the accompanying drawing, in which my invention is fully illustrated.
The shuttles of looms for weaving net-lace and curtains have flat bobbins of
a disc-like form, consisting of two discs both being turned hollow on the inside
and rivetted together.
The space between these form a circular annular, hollow receptacle for the
thread. The bobbin a is placed into an opening of the shuttle made to fit, and
is detained by the shuttle, an edge of which encircles nearly half of the cir-
cumference of the bobbin and projects into the space between the disc parts
of the bobbin. Furthermore, a spring d is fastened at one end to the shuttle,
whereas the other end is provided with a nose e extending into the hollow space
between the discs, and gliding upon the circumference, serves to press the
shuttle down, so as to keep it in position and produce the necessary strain of
thread b. This spring is arranged for a double purpose:
First as already pointed out, to detain the bobbin a in the shuttle and
Further to exercise friction upon the same.
Preferably the spring is made so strong, that the pressure exercised upon the
circumference u, tends to oppose such a resistance to the thread b wound off, as
is necessary to produce the desired strain. As the pressure exercised upon the
circumference always remains constant, but the thread being wound off, acts
upon or draws an arm or lever, being nearly equal to that on which the spring
operates, and is continually diminished by the thread being unwound, till the
same is scarcely as long as the radius of the bobbin, it is obvious that the strain
This fact, renders the production of
of the thread continually increases.
symmetrical goods difficult and makes a continued change of the strain of the
warps necessary, but cannot be avoided with the shuttles now in use.
This difficulty is obviated by the present invention, for the thread, instead
of being led directly through the hole in the crown of the shuttle, is so led that
the strain upon it, influences the friction organ (in common arrangements the
spring) in such a manner, that, with increasing strain of the thread, the friction
is diminished in the same proportion.
For the purpose mentioned, the thread of the bobbin is led through a hole c

page_text: of the shuttle, and then through an eye e in the front end of the spring and
finally, through the hole in the crown of the shuttle.
The operation of the new object is as follows:
As long as the bobbin is filled, the thread being unwound can easily rotate
the same, as the same operates an arm or lever, equal to that of the spring 7. The
smaller the arm or lever becomes, the greater the strain in the thread will become
to overcome the friction, the greater also becomes the influence of the thread on the
spring in consequence of which latter fact, the pressure of the spring against the cir-
cumference of the bobbin a diminishes. The forces, in fact, compensate them-
selves from the beginning to the end of the winding of the thread, in such a
manner, that the strain in the thread practicably remains constant. Therefore
the goods produced have a symmetrical make and a regulation of the thread
strain being only necessary as far as the decrease of the circumference of the
warp-beam requires the same.
Dated this 23rd day of November 1899.
GEO. H. RAYNER,
I.
37, Chancery Lane, London, Agent for the Applicant.
•
Improvements in the Carriages of Lace-making Machines.
1, PAUL MORITZ SCHIERSAND, of Kappel, near Chemnitz, in the Kingdom of
Saxony, German Empire, Director, 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 present invention relates to a new shuttle for weaving net-lace and curtains
and has for its object an improved arrangement, whereby the strain of the shuttle
thread is automatically regulated in such a manner, that the strain, increasing
as the diameter of the thread. windings decreases, is utilised to diminish the
friction of the shuttle. According to the invention this is gained by leading
the thread through an eye of the spring pressing against the shuttle, so that with
increasing tension, the spring is accordingly drawn back.
In order that this invention may be more fully understood, reference is made
to the drawing filed with the Provisional Application, in which my invention is
fully illustrated.
The shuttles of looms for weaving net-lace and curtains have flat bobbins of
a disc-like form, consisting of two discs both being turned hollow on the inside
and rivetted together.
The space between the same forms a circular annular hollow receptacle for the
thread. The bobbin a is placed into an opening of the shuttle made to fit, and
is detained by the shuttle, an edge of which encircles nearly half of the cir-
cumference of the bobbin and projects into the space between the disc parts
of the bobbin. Furthermore, a spring d is fastened at one end to the shuttle,
whereas the other end is provided with a nose e extending into the hollow space
between the discs, and gliding upon the circumference u, serves to press the
bobbin down, so as to keep it in position and produce the necessary strain of
thread b. This spring is arranged for a double purpose:
First as already pointed out, to detain the bobbin a in the shuttle, and
Further to exercise friction upon the same.
Preferably the spring is made so strong, that the pressure exercised upon the
circumference u, tends to oppose such a resistance to unwinding of the thread b,

page_text: as is necessary to produce the desired strain. As the pressure exercised upon
the circumference always remains constant, but the thread being unwound, acts
with a leverage, at first nearly equal to that on which the spring
operates, but continually diminished by the thread being unwound, till
it is scarcely as long as the radius of the bobbin, it is obvious that the strain
of the thread continually increases. This fact renders the production of sym-
metrical goods difficult and makes a continued change of the strain of the warps
necessary, but cannot be avoided with the shuttles now in use.
This difficulty is obviated by the present invention for the thread, instead
of being led directly through the hole in the crown of the shuttle, is so led, that
the strain upon it influences the friction organ (in common arrangements the
spring) in such a manner, that, with increasing strain of the thread, the friction
is diminished in the same proportion.
For the purpose mentioned, the thread of the bobbin is led through a hole c
of the shuttle, and then through an eye o in the front end of the spring and
finally through the hole in the crown of the shuttle.
The operation of the apparatus is as follows:
As long as the bobbin is filled, the thread being unwound can easily rotate
it, as the thread operates an arm or lever, equal to that of the spring d. The
smaller the arm or lever becomes, the greater the strain in the thread will become
to overcome the friction, the greater also becomes the influence of the thread on the
spring in consequence of which latter fact, the pressure of the spring against the cir-
cumference u of the bobbin a diminishes. The forces, in fact, compensate them-
selves from the beginning to the end of the winding of the thread, in such a
manner, that the strain in the thread practicably remains constant. Therefore
the goods produced have a symmetrical make and a regulation of the thread
strain being only necessary as far as the decrease of the circumference of the.
warp-beam requires the same.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:-
1. An improved shuttle for looms, weaving net-lace and curtains with means
for automatically regulating the strain of the shuttle thread in such a manner,
that the strain increasing with the decrease of the diameter of the bobbin is
utilised to diminish the friction of the spring upon the shuttle, substantially
as described.
i
2. An improved shuttle provided with an opening to receive a bobbin com-
posed of two discs, a semicircular flange projecting within the opening of the
shuttle, and extending between the discs of the bobbin, and a spring fastened
to the shuttle, pressing and gliding upon the bobbin and provided with an eye,
the shuttle thread passing through a hole in the shuttle, through the said eye
and then through a hole in the crown of the shuttle, substantially as and for the
purpose described.
GEO. H. RAYNER,
37, Chancery Lane, London, Agent for the Applicant.