IMPROVEMENTS IN BOBBIN OR SPOOL WINDERS FOR SEWING MACHINES
Year: 1885

page_text: I PAUL LANGROCK of the firm of Theodor Vogel of Saalfeld, in the Empire of
Germany, Sewing Machine Manufacturer do hereby declare the nature of my
said invention for "IMPROVEMENTS IN BOBBIN OR SPOOL WINDERS FOR SEWING
MACHINES" and in what manner the same is to be performed to be particularly
described and ascertained in and by the following statement:-
This invention relates to the construction and application to bobbin or spool
winders of sewing machines of a simple arrangement of mechanism whereby when
the required amount of thread has been wound on the bobbin the winding is
automatically stopped in a more simple manner than hitherto.
In order to enable my invention to be fully understood I will proceed to describe
the same by reference to the accompanying drawing in which figure 1 is a front
elevation and figure 2 an end elevation of a bobbin or spool winder provided with
my improvements; a, a is the ordinary headstock of the winder pivoted or swivelled
to the usual bracket b, by which it is fixed to the sewing machine bed or table;
c the usual driving or friction wheel on the spindle d; e the sliding spindle between
which spindles the spool or bobbin f, is held for winding; g is the usual spring
presser plate.
To this bobbin or spool winder I adapt a lever such as h, h¹, fulcrumed at i; the
shorter arm, of this lever is at right angles, or nearly so, to the longer arm h.
The said shorter arm, of the lever is inclined or chamfered at j and is kept
against the edge of the presser plate g, by a suitable spring k-On the tail end of
the long arm h, of the lever is a pin or screw 1, which with the lever h, h¹, and the
lever or arm m, fixed to the bracket b, forms a trigger or catch arrangement.
The action of the improved apparatus is as follows: The bobbin f, is placed in
the headstock in the ordinary manner, and the projecting end of the pin or screw l,
being brought behind the arin m, as shown in the drawing, the friction wheel c,
will thereby be held against the wheel of the sewing machine and the hobbin f,
will be wound in the usual manner. As the thread is wound on the bobbin the
increased diameter thereof gradually pushes down the pressure plate'g, the edge of
which acting against the inclined shoulder j of the lever h, h, moves the said lever
on its fulcrum i, thereby raising the pin or screw 1, and when the bobbin has been
fully wound the said pin or screw 1, will be raised free of the arm m, and the
TD 1

page_text: winder will, by means of its spring, be slightly turned on its swivel or pivot, and
the friction wheel c, being thereby moved from contact with the wheel of the
sewing machine, the winding will cease.
The bobbin is then removed from the winder and a fresh bobbin being placed
therein it is merely necessary to push the friction wheel c, against the wheel of
the sewing machine and the projecting end of the pin or screw 1, will be thereby
passed behind the arm m, so as to retain the winder in position for winding until
it is again put out of action as hereinbefore described.
It will be obvious that the amount of movement of the lever h, h¹, and
consequently the quantity of thread wound on the bobbin can be regulated by
adjusting the screw 7.
Having now particularly described and ascertained the nature of my
invention and in what manner the same is to be performed I declare that what
I claim is
1. In a bobbin or spool winding apparatus for sewing machines the combination
with the usual presser plate of a lever, such as h, h¹ having an adjustable screw or
pin, and the fixed arm m, arranged and operating in the manner and for the
purpose substantially as herein before described.
2. The improved bobbin or spool winder for sewing machines hereinbefore
described and represented in the accompanying drawing.
G. F. REDFERN,
4, South Street, Finsbury, London,
Agent for the Applicant.