Improvements in Oscillating Shuttle and other Sewing Machines, and in the Adaptation of the same for use in Conjunction with Appliances for Button-holing, Embroidering, and the like.
Year: 1892

page_text: COMPLETE SPECIFICATION.
Improvements in Oscillating Shuttle and other Sewing Machines,
and in the Adaptation of the same for use in Conjunction with
Appliances for Button-holing, Embroidering, and the like.
We GEORGE SPEIGHT of Smith Street, Bradford, in the County of York,
Drysalter, and SAMUEL CHAPMAN of 70 Herbert Street, Blackley, in the
County of Lancaster, Machinist, do hereby declare the nature of this invention to
be as follows:-
Our said invention relates particularly to oscillating shuttle sewing machines
but has reference also to other sewing machines in which the shuttle oscillates or
vibrates or revolves or works in the direction of the feed. As is well known it
is the custom in certain machines and for certain purposes such as button-holing
and embroidering, to use two needles in conjunction with the ordinary needle bar.
When the shuttle works at right angles to the direction of the feed as for instance
in the ordinary lockstitch Singer sewing machine, the duplication of the needles
presents no difficulties seeing that the shuttle moves closely past the side of both.
But where the shuttle oscillates or moves in the direction of the feed as for
instance is the case in the oscillating shuttle machine, difficulties at once arise
when it is desired to apply two needles.
To overcome these difficulties we use means to deflect the lower part of the
furthest off needle, practically into line with the needle next to the shuttle after
the former needle has passed through the fabric and at the time when the loops
are thrown out in the path of the shuttle. By thus deflecting one needle into line
with the other the loops are thrown simultaneously side by side into the path of
the shuttle so that the shuttle thread locks both loops simultaneously which is
the desired object. The deflecting part may consist of an inclined plate or surface
fixed to or formed on any convenient part of the machine in juxta-position to the
needles. In an oscillating shuttle machine we prefer to mount the deflecting plate
upon the cover ring which confines the shuttle and carrier in the race-but in other
types of machines the said deflector might be otherwise mounted or fixed.
As a modification of our invention instead of using a deflector to deflect one of
the needles we might reduce the nose of the oscillating shuttle so that it can pass
between the needles. In such a case the loops are simultaneously thrown into the
space between the needles and into the path of the shuttle.
The reduced nose of the shuttle passes through the loops and causes the shuttle
thread to lock them as in the former case. We do not however think the latter
modification as useful as the first.
To render our invention perfectly clear we will now proceed to describe the
same more particularly with reference to the annexed sheet of drawings.
The said drawings are enlarged diagrammatic views rather than exact repre-
sentations of the objects, but we have chosen this mode of illustrating the
description as more likely to be conductive to a clear comprehension of our
invention.
Figs. 1, 2, 3 and 4 illustrate our plan for deflecting one of the needles.
Figs. 5 and 6 show the modified arrangement for passing the reduced shuttle
nose between the needles.
Referring firstly to Figs. 1 to 4 the outer needle is marked a the inner a¹. The
oscillating shuttle b works in the direction of feed which is indicated by the arrow
in Fig. 1. A thread 1 passes through the needle a and a thread 2 passes through
the needle a'. In order to enable the nose of the shuttle b to pass through the
loops 1 and 2 we arrange that the needle a shall be deflected from the position
shown in full lines Fig. 1 into the position shown in dotted lines, so that it may

page_text: throw out its loop I simultaneously and side by side with the loop 2 from the
needle a¹ thus enabling the shuttle to pass through both loops at the same time
and so lock them by the shuttle thread.
This deflection of the needle a is brought about by placing an inclined plate or
part in the path of the downward stroke of the needle a so that after passing
through the fabric and when approaching the position from which the loop should
be thrown out, the said needle a glances down the smooth iuclined surface of the
plate and is pushed or deflected to one side towards the needle a'. Thus Fig. 2
shows the two needles side by side as they are descending after passing through
the fabric and before the needle a is deflected by the plate c while Fig. 3 shows
the position assumed by the needle a after being deflected by the plate c. It
will be seen that the needle a has been thrown into a position which for all
practical purposes is in line with the needle a' so that when the loops and 2
are thrown out on the upward stroke of the needle the said loops as shown in
Figs. 1 and 3 are side by side and in the path of the shuttle & so that they are
both engaged thereby and locked by the shuttle thread. We have found in
practice that the slight bending to which the needle is subjected does not affect its
straightness when lifted free of the plate c. The plate or deflector c when applied
to an oscillating shuttle machine can we find be most conveniently mounted upon
the cover ring d (see Fig. 4) which serves to confine the shuttle and carrier in the
ring race as will be well understood by those conversant with sewing machines.
In Fig. 4 the inclined deflecting plate c appears, being fixed to the cover ring d by
the studs e e¹. The studs el might pass through a slot in the plate c so as to allow
the plate to be moved a little up or down.
The hereinbefore mentioned modification of our invention whereby we dispense
with the deflecting plate e is illustrated by Figs. 5 and 6. Here the position of
the needle a is slightly altered and the nose of the shuttle is reduced so that
it can pass between the needles the pitch apart of which is necessarily restricted.
On their upstroke, the two needles a a¹ simultaneously throw their loops 1 and 2
into the space between the needles and into the path of the shuttle nose b which
thus engages the loops and locks them with the shuttle thread.
The arrangement hereinbefore described and illustrated may be used in con-
junction with any suitable or known appliance for button holing or embroidering.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is
1) In oscillating shuttle and other sewing machines in which the shuttle
oscillates, revolves or works in the direction of the feed and fitted with two
needles to work in conjunction with any suitable appliance for button holing or
embroidering, deflecting the needle which is furthest from the shuttle towards or
into line with the needle nearest to the shuttle by means of an inclined deflecting
plate or surface or body mounted upon the cover ring of an oscillating shuttle
machine or upon any other suitable part in other types of machines so as to throw
both loops simultaneously into the path of the shuttle, for the purposes and
substantially as described and shown.
2) In oscillating shuttle sewing machines of the indicated nature and intended
to be used as set forth, the employment of an oscillating shuttle having a reduced
nose capable of entering between the two needles and engaging with the loops
formed thereby, substantially as described and as illustrated by Figs. 5 and 6 of
the drawings.
Dated thin 6th d CM
1000