Year: 1886

page_text: We NATHANIEL WHEELER, President of the Wheeler and Wilson, Manufacturing
Company, and WIEBUR FISKE DIAL, Machinist, both of Bridgport, Connecticut,
United States of America, do hereby declare the nature of our invention 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 sewing machines and has for its object to provide means
for positively rotating a segmental loop-taker in a circular race or loop-taker-guide the
said invention being an improvement upon the machine described in the specification
of former Letters Patent dated October 13th 1885 No. 12209 to which reference may
be had.
The machine described in the said specification has, as the driver for the loop-taker,
a saddle fixed to one end of a variably rotating shaft, the said saddle being provided
at one end with a lug and at the other end with a prong, the said lug, owing to the
eccentric adjustment of the loop-taker-guide, being made to move out and in a notch
in the loop-taker back of its point, the said lug at times pushing, and at other times
pulling the loop-taker in its guide.
According to the present invention the eccentric adjustment of the loop-taker-guide
with relation to the rotation of the shaft carrying the saddle is maintained, but, instead
of a long saddle extended somewhat about the bridge of the loop-taker and having at
one end a point and at its other end a lug separated a considerable distance one from
the other, as described in the said former specification I have made a lighter and
simpler driver, consisting of an arm provided with two projections, one extending out-
wardly into a notch in the loop-taker back of its hook, substantially as does the lug
described in the said former specification, the second projection extending downwardly
from the said arm and entering a notch in the loop-taker or its bridge at or near its
junction with the shoulder of the loop-taker; the said two projections being substan-
tially in line one with the other as will be described, and constituting a double ended
horn, which, in the rotation of the shaft, enters first one and then the other notch of
the said loop-taker, the movement of the horn taking place at the proper time to
permit the loop of needle thread to pass the horn, and the loop-taker to pass through
the said loop.

page_text: The horn at all times impels the loop-taker positively through the loop of needle
thread.
My invention consists essentially in a rotating shaft having an arm provided with a
horn comprising inwardly and outwardly extended projections, and a-loop-taker pro-
vided with two recesses back of its point, the said horn moving the said loop-taker in
a loop-taker-guide, substantially as will be described.
In the accompanying drawing,
Figure 1 is a front elevation of a sufficient portion of a sewing machine to enable
my invention to be understood, the bobbin-holder being partially broken away.
Figure 2 is a section of Figure 1 on the dotted line - the bobbin-holder being
however added.
Figure 3 is a front elevation of the loop-taker-guide, the loop-taker and the horn and
its arm for rotating it, and
Figure 4 is a perspective view of the variably rotating shaft and its attached arm
and horn.
The bed-plate A reciprocating shaft B, crank B³, variably rotating shaft Bo, the
hanger D having the hub D³, the loop taker-guide D' set eccentrically to the centre of
the shaft B, the screw D*, the bobbin case a and its projection a¹, and cap n are all
substantially as in the machine described in the specification of the said former patent
and are herein designated by like letters.
The loop-taker G, as herein shown, is shaped externally and has a point 9,. shoulders
gg, a heel and a bridge 9¹, substantially as indicated by like letters in the said
former specification; and between the said. shoulders 93 and 9, there is a recess, but
herein, besides the said recess, I have provided the shank of the loop-taker with a
recess 2 in continuation of the said recess, and also I have provided the loop-taker at
or near the junction of the bridge gland shoulder with a recess 4, both the said
recesses 2 and 4 being in the same radial line with relation to the centre of rotation of
the loop-taker.
Instead of the saddle described in the said former specification I have provided the
shaft Be with an arm 5, which at its outer end is bent into nearly horizontal position,
and is provided with two projections 6, 7, one extending outwardly and the other
inwardly, the two projections 6, 7 constituting a horn, one part of which enters the
recess 2, and the other the recess 4, one entering one recess while the other is being
withdrawn from the other recess, such change of position of the horn taking place
during each rotation of the shaft Bo.
In this invention the eccentricity of the loop-taker-guide is a little greater with
relation to the centre of rotation of the shaft B than in machine described in the
specification before referred to.
Figure 1 shows the point or back of the loop-taker as having been moved far enough
to enter a loop of needle thread, and in such position the projection 7 of the horn rests
in the recess 4 and moves the loop-taker in the loop-taker-guide, but by the time that
the shaft B and loop taker have been rotated over a distance of 180°, or into the
position shown by Figure 3, the projection 6 of the horn, owing to the eccentric
position of the loop-taker-guide D¹, is made to enter the recess 2, the projection 7 with-
drawing from the recess 4 leaving the loop of needle thread free to be drawn up about
the loop-taker and so as to enclose its thread.
As herein shown, the horn and the part of the arm 5 of which it forms a part, is of
T-shape.
To retain the bobbin-case a in the central space of the loop-taker, I employ a
bobbin-holder h, pivotted at h¹ and slotted at 3, a latch h³, pivotted at ht and acted
upon by a spring h³, entering the said slot, as shown fully in Figure 2, and keeping the
bobbin-holder h in upright position, the depression of the outer bevelled end of the
latch causing the disengagement of the latch from the bobbin-holder.
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 :-
First. The combination of the rotating shaft; an arm attached to it provided with a

page_text: horn consisting of an inwardly extended projection 7; and a loop-taker having two
opposite recesses 2, 4. at the rear of its point or beak and in line with the centre of
rotation of the loop-taker, into which recesses the ends of the said horn enter alternately
as the said shaft is rotated, one or the other of the projections of the said horn operating
to pull the said loop-taker point forward in the loop-taker-guide, as set forth.
Second. The rotating shaft, its arm provided with a horn comprising inwardly and
outwardly extended projections, and a loop-taker. provided with two recesses back of
its point, combined with a loop-takor-guide set eccentrically to the axis of rotation of
the shaft for rotating the arm carrying the said horn, the said parts being arranged
and operating substantially as described.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London,
Agents for the Applicants.