IMPROVEMENTS IN SEWING MACHINES
Year: 1876

page_text: LETTERS PATENT to Peter Jensen, of 33, Chancery Lane, London, for the
Invention of "IMPROVEMENTS IN SEWING MACHINES." A communication from
abroad by Heinrich Pollack, of Hamburg, Germany.
Sealed the 1st May 1877, and dated the 3rd November 1876.
PROVISIONAL SPECIFICATION left by the said Peter Jensen at the Office
of the Commissioners of Patents on the 3rd November 1876.
PETER JENSEN, of 33, Chancery Lane, London. "IMPROVEMENTS IN SEWING
MACHINES." (A communication from abroad by Heinrich Pollack, of Hamburg,
Germany.)
The object of this Invention is mainly to bring the thread in the shuttle in the
required position for sewing without drawing the out-running end of the thread
through a closed hole, all as herein-after described; it also includes an application
of the shuttle thread in button-hole sewing.
The first part of the Invention will be understood by a description of the mode
of its application. To enable the shuttle spool to be put into or taken out from
the shuttle the spool thread guide must be raised to a slanting position. Having
put the spool in, it is closed quite down again, the thread is now passed over the
aforesaid guide and through a slanting notch which is formed in the side of the
shuttle and under a tension spring, it is then passed to the front under a small nose
or hook on the tension spring. The latter rests on the shuttle and is in front
formed with the aforesaid nose which rests in a cavity in the shuttle, and is sloped
off from the side from which the thread is drawn away under it.
When the shuttle is turned with its point to the operator the thread is drawn
towards the front and a little towards the right, and lies along the slope under the
small nose and is thus enclosed under the spring. The tension spring is also fitted
with a small peg which passes through a hole in the side of the shuttle.
When the shuttle during the sewing goes forward the thread lays itself against
this small peg; when the shuttle goes back the aforesaid small nose or hook prevents
it from being drawn under the tension spring, and is thus by these two parts
always kept in its right place. A hook shaped hollowed out part of the nose
prevents the thread from being drawn back again on that side. By means of a
[Price Gdı

page_text: small regulating screw passing through the side of the shuttle the spring tension
can be regulated as required.
'
The next part of this Invention refers to a mode of and means for sewing the
shuttle spool thread into a button hole.
The mode of application of this part of the Invention is as follows:-The end of
the thread is drawn out of the shuttle and up through the needle plate, so far
that the distance passed from between two tension discs is about an inch longer
than double the length of the button hole to be made. As the needle in sewing
alternately passes through the hole in the needle plate and the edge of the material,
the needle goes beyond the thread and is thus sewn in the button hole. The latter
hereby acquires greater durability and the stitches cannot be unravelled except by
cutting them.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Peter Jensen in the Great Seal Patent Office on the 3rd May 1877.
PETER JENSEN, of 33, Chancery Lane, London. "IMPROVEMENTS IN SEWING
MACHINES." A communication from abroad by Heinrich Pollack, of Hamburg,
Germany.
The object of this Invention is mainly to bring the thread in the shuttle in the
required position for sewing without drawing the outrunning end of the thread
through a closed hole, all as herein-after described; it also includes an application
of the shuttle thread in button-hole sewing.
Figure 1 is a perspective view of the new shuttle; Figure 2, plan of same;
Figure 3, side elevation; Figure 4, a detail.
The first part of the Invention will be understood by a description of the mode
of its application. To enable the shuttle spool to be put into or taken out from the
shuttle the spool thread guide a must be raised to a slanting position, as shown at
Figure 1. Having put the spool in, it is closed quite down again, the thread is now
passed over the aforesaid guide a and through a slanting notch b (Figure 3) which
is formed in the side of the shuttle and under a tension spring e, it is then passed
to the front under a small nose or hook on the tension spring e. The latter rests
on the shuttle and is in front formed with the aforesaid nose, which rests in a
cavity in the shuttle and is sloped off from the side from which the thread is
drawn away under it, see Figure 4, which shews a front elevation of the spring to
an enlarged scale.
When the shuttle is turned with its point to the operator the thread is drawn
towards the front, and a little towards the right, and lies along the slope under the
small nose, and is thus enclosed under the spring. The tension spring e is also
fitted with a small peg c, which passes through a hole c¹ in the side of the shuttle,
see Figure 3.
When the shuttle during the sewing goes forward the thread lays itself against
this small peg c, as shown at Figure 1; when the shuttle goes back the a foresaid
small nose or hook prevents it from being drawn away from under the tension
spring e, and is thus by these two parts always kept in its right place. A hook
shaped hollowed out part of the nose prevents the thread from being drawn back
again on that side.
Figure 2 shows the shuttle with closed down thread guide. By means of a small
regulating screw & passing through the side of the shuttle the spring tension can be
regulated as required.
The next part of this Invention refers to a mode of and means for sewing the
shuttle spool thread into a button hole. This part of the Invention is illustrated
by Figures 5 and 6, which are plan and side elevation respectively of part of the
needle plate of a sewing machine. a is the table of the machine; b, the needle
plate; c, a lever with tension discs d at the end for regulating the thread tension ;
é is the thread from the shuttle spool.

page_text: The mode of application of this part of the Invention is as follows:-The end of
the thread e is drawn out of the shuttle and up through the needle plate b, so far
that the distance passed from between two tension discs d is about an inch larger
than double the length of the button hole to be made. As the needle in sewing
alternately passes through the hole in the needle plate b and the edge of the
material, the needle goes beyond the thread e and is thus sewn in the button hole.
The latter hereby acquires greater durability and the stitches cannot be unravelled
except by cutting them. The lever c can be set or adjusted so that the distance
from the hole in the needle plate to the tension & may be made suitable for various
lengths of button bole; this object can obviously be accomplished in many other
ways than the one here shewn, which however is simple and efficient.
And having thus fully described and ascertained the nature of this Invention, I
declare that I claim,-
Firstly. The slanting open notch b as applied to sewing machine shuttles, as set
forth.
Secondly. The slanting open notch bin combination with the tension spring e
and the jointed thread guide d or equivalent means as applied to sewing machine
shuttles, as set forth.
Thirdly. The mode of and means for sewing the shuttle spool thread into a
button hole, and specially the thread tension d or equivalent means for that purpose,
as set forth.
In witness whereof, I, the said Peter Jensen, have hereunto set my hand
and seal, this Third day of May, in the year of our Lord One thousand
eight hundred and seventy-seven.