Improvements in or relating to Shuttles for Sewing Machines and the like.
Year: 1897

page_text: Date of Application, 6th Oct., 1897-Accepted, 26th Feb., 1898
COMPLETE SPECIFICATION.
Improvements in or relating to Shuttles for Sewing Machines and
the like.
I, WILHELM EISELT, of 52, Blumenstrasse, Dresden, Saxony, in the German
Empire, Factory Director, do hereby declare the nature of my said invention and
in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
The employment of thread in sewing machines has hitherto been usually carried
on with the application of the open longitudinal shuttle, in such a manner, that
the sewing thread, by means of a suitable apparatus attached to the machine, bas
been brought or conveyed from a large spool on to the smaller shuttle spool or
bobbin, the latter being enclosed in the shuttle frame, and the object of my inven-
tion is to effect improvements in or relating thereto.
And in order that my said invention may be particularly described and ascer-
tained, reference is hereby made to the accompanying drawings, in which similar
letters of reference indicate corresponding parts.
Referring to Figures 1 to 3 the ordinary arrangement of the bobbin in the
shuttle, as hitherto constructed, is shown; s is the shuttle, a is the spool spindle,
e is the bobbin, and a¹ a² are the sockets. This arrangement (at present in use)
of the working thread in a sewing machine with a longitudinal open shuttle has
many disadvantages; viz. Apart from the complicated spool arrangement, which
frequently requires repairing, the process of sewing becomes extremely tedious,
The bobbin revolving freely in the shuttle, arranged so as to prevent touching the
shuttle walls, allows only a small quantity of thread to be wound upon the bobbin.
The feeding of the necessary quantity of sewing thread into the shuttle, frequently
necessitates the interruption of the work, and causes much waste of time.
Also the large spool, formed with a wooden body is objectionable; for instance,
in the purchase of spool thread, the buyer (besides the cost of double ticketing)
must also provide for the wooden spool, without in most cases being able to ascer-
tain the precise quantity of thread wound
upon it.
The before mentioned disadvantages are in the simplest manner overcome by
the present invention, by a combination of a sewing machine longitudinal
shuttle, with a bobbin revolving on its own centre without any spindle.
Figs. 4 to 6 show my improvements as applied to a shuttle of the Singer"
system, and Figs. 7 to 9 show the application of my invention to swinging shuttles,
opened only at one end.
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The shuttle is indicated by the letters and the bobbin by the letter p.
Fig. 10 is an elevation of the bobbin p, and Fig. 11 is a section of the same
detached from the shuttle.
The bobbin is introduced into the shuttle without any central spindle, and the
thread is withdrawn for use from the interior of the bobbin. The winding of
the thread to form the bobbin is made diagonally to the longitudinal axis of the
bobbin. The exterior diameter of the bobbin thus always remains the same, and
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01

page_text: furnishes a means for obtaining a constant amount of surface friction by its con-
tact with the shuttle, and the necessary tension is thereby uniformly maintained.
The combination of an open sewing machine longitudinal shuttle with a bobbin
revolving therein simplifies the construction of the interior of the shuttle, and
ensures the reception of the greatest possible amount of sewing thread as also a
quicker insertion and changing of the bobbin, and extends the usefulness of the
machine itself.
66
The shuttle prepared" bobbin, can easily be applied to the present spools with
wooden bodies, ensuring longer use without deterioration.
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. The improvements in or relating to shuttles for sewing machines and the
like substantially as described.
2. In a shuttle for sewing machines and the like, the combination of a loose
bobbin with a longitudinal shuttle, which simply requires a bobbin securely
placed in the shuttles, whereby the tension of the thread is regulated by the
elastic operation of the bobbin, substantially as described and illustrated by the
drawings.
Dated th Onto 1907
GEORGE DOWNING & SONS,
8, Quality Court, London, W.C., Agents.