IMPROVEMENTS IN SEWING MACHINES
Year: 1882

page_text: LETTERS PATENT to Herbert John Haddan, of Kensington, Middlesex for an
Invention of IMPROVEMENTS IN SEWING MACHINES
him from abroad by J. A. Doering, of Leipzig, Saxony.
A communication to
PROVISIONAL SPECIFICATION left by the said Herbert Jolin Haddan at tl.e
Office of the Commissioners of Patents on the 24th August 1882.
HERBERT JOHN HADDAN, of Kensington, Middlesex, "IMPROVEMENTS IN
SEWING MACHINES," a communication to me from abroad by J. A. Doering, of
Leipzig, Saxony,
This invention relates to the construction of shuttles for sewing machines, for all
possible purposes to which they can be put, the peculiarities of which as here
improved consist in
First An excentrically rotating shuttle propeller with a pin working into the
groove of the shuttle and causing its rotation, in combination with a loop holder
in such a manner as to effect a complete consumption of the thread and the pulling
tight of each needle thread loop when formed.
Second: A conical formation of the outer surface of the shuttle and its
lodgment on the edge of the shuttle-carrier, whereby in the course of wear a
change of the position of the shuttle is prevented.
Third An excentrically rotating spool-thread tube in order to effect a pulling
tight of the spool-thread in the moment of the pulling tight of the needle thread
loop.
Fourth A spool thread tension apparatus consisting of a perforated friction
drum in the shuttle, the drum bearing a capsule conically placed or fixed on pivots,
over which capsule the spool is inserted, no matter from what side, without
disturbing the uniformity of the tension created by leading the thread around
the drum.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Herbert John Haddan in the Great Seal Patent Office on the
24th February 1883.
HERBERT JOHN HADDAN, of Kensington, Middlesex, "IMPROVEMENTS IN
SEWING MACHINES," a communication to me from abroad by J. A. Doering, of
Leipzig, Saxony.
This invention has for its object improvements in the construction or arrangement
of the shuttle of sewing machines.
In the following description reference will be had to the accompanying drawings,
Sheets I and II, Figs 1 to 18, which illustrate this invention.
The shuttle is a rotating shuttle carrying in its centre the reel; it is made of a
special shape and arranged in a peculiar and advantageous manner for the formation
of the thread loop.
The shuttle S is situated in the fixed shuttle carrier K, which is provided at its
lower part with a flanger on which rests the shuttle.
The inner surface of the shuttle carrier, as well as the outer surface of the
shuttle proper, are of a conical shape in order to prevent the shuttle from shifting
its axis and losing its concentric motion by wear.
Situated at the bottom of the shuttle carrier is a shuttle driver A, provided with
a pin b, and rotating excentrically so as to produce by means of the pin b a peculiar
effect on the shuttle and on the thread loop.
The pin b engages into the groove g of the shuttle S, and thereby causes the
latter to rotate, during which rotation the pin b performs in the groove g a peculiar
motion caused by the excentric rotation of the shuttle driver.
The operation of sewing is performed in the following way.
The needle arrives in its lowest position (see Figs. 12 and 13) in which position
the thread loop of the needle is caught by the point of the shuttle and is maintained
by the groove g.
The thread then passes under the shuttle without being subjected to the least
friction (see Figs 14 and 15) owing to the shuttle S resting with its outer edge
only on the flanger of the shuttle carrier. On the further rotation of the shuttle.
caused by the pin b the sewing-loop proper is formed by the spool-thread (Fig 16
and 17), and after still further rotation of the shuttle the needle begins to rise,
and the complete consumption of the needle thread-loop begins. The latter
operation continues in proportion as the thread leaves the shuttle, until finally the
loops arrives in the groove g in which the loop goes round the pin in such a
manner as not to come in contact with the latter (Fig. 18). Notwithstanding
this the pin bin combination with the loop holder prevents the premature escape
of the needle thread loop.
The latter is retained by the loop holder u and prevented from leaving the same,
owing to the position occupied in this moment by the pin b, until the needle has
arrived almost in its highest position.
When the needle is at this point, the pin 6 occupies the position shown in
Fig. 18, and the loop is thereby allowed to leave the groove g and the loop
holder u but gradually as required by the gradual dissolution caused by the motion
of the needle.
By the peculiar effect of the loop-holder u and the pin b it is possible to pull
the needle thread tight after each stitch, whereby a very neat and solid seam is
obtained.

page_text: Furthermore, as the tightening of the spool-thread contributes essentially to the
formation of a neat seam, the present construction of the shuttle is arranged in
such a manner, that at the moment of tightening the needle thread loop, the spool
thread is pulled tight by means of an excentrically rotating spool-thread tube i.
During the formation of the shuttle loop the spool thread is loose, the eye being
placed in such a manner that the space between the latter and the stitch hole is
smaller than at the moment of tightening the thread loop, in which case the
tightening of the spool thread is required.
A further peculiarity of this construction of the shuttle consists in the arrange-
ment of a thread tension apparatus in the rotating shuttle, which apparatus
comprises a scale easily indicating the amount of tension necessary for the different
kinds of material.
CLAIMS:
Sewing machine-shuttles provided with the following peculiar appliances or
features of construction.
1, An excentrically rotating shuttle-driver with pin 6 projecting into the recess g
of the shuttle S, said pin being adapted in conjunction with the loop-holder u to turn
the shuttle and to produce a complete dissolution and tightening of the needle-
thread loop at every stitch, in the manner substantially as described.
2. The outer wall or circumference of the shuttle is conical, and the shuttle S
rests on the flange or rim r of the shuttle-carrier, so as to prevent the shuttle axis
from displacement in consequence of wear and tear.
3. An excentrically rotating spool-thread-tube adapted to tighten the spool-
thread at the moment of tightening the needle-thread loop, in the manner
substantially as described.
In Witness whereof, I, the said Herbert John Haddan, have hereunto set my
hand and seal this 24th day of February A.D. 1883.