Year: 1886

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We, JASPER VANNETT sewing machine rebuilder and GEORGE SHRIVER
YINGLING wholesale cigar dealer, both of Tiffin in the State of Ohio, one of
the United States of America do hereby declare the nature of this invention and
in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :-
Our invention relates to improvements in that class of sewing machines known.
as "oscillating-hook" machines; and it consists in the combination and arrange-
ment of parts, as hereinafter specified, and pointed out in the claims.
In the drawings, Fig. 1 represents an end view of the device when in position in
a machine; Fig. 2, a longitudinal section of the same, and Fig. 3 a vertical
sectional view on line xx, Fig. 2.
The shaft A, Fig. 2 rests under the bedplate B of a machine, and has imparted
to it by suitable mechanism a rotary oscillating movement. This shaft is provided
with a head, C, having eccentrically in it a hole or passage, D. Held normally in
the hole D by means of a set-screw, E, is a pin, F, projecting from a disk, G,
having its face slightly rounded. Having a single point of attachment, H, to one
edge of the said disk G is a cylindrical frame, I, broken in its continuity by the
mouth K, which has overlapping lips. Erected on the frame I, on that side of the
mouth occupied by the under lip is a hook, L. The inner edge of the said frame
is parallel to but at a slight distance from the face of the disk G, except at the
connecting-point H. Within the frame I rests the cylinder M, having one end
closed, and from which closed end projects inwardly a spindle, N, for the bobbin-
spool O. This spindle is not essential. This cylindrical case and the contained
bobbin is held in place in the interior of the frame I by a door, P, having
projecting from one side a hinge-rod, R, one side of which is flattened and forms a
bearing for the retaining-spring S. This door may be turned to one side, as in
Fig. 1. The closed end of the case M is concaved somewhat on the exterior, and
thereby forms a seat for the tension-plate T, which consists of a disk, and which
is held in place by a screw, U, under the head of which is interposed the spring-
washer V. In the edges of the closed end of the said case M are the diametrically
opposite holes W, and on the surface of the case is a depression, X, connecting a
hole, Y, about centrally located, to one of the said holes W. The thread from the
bobbin passes through these holes and under the tension-plate T. The bobbin-case

page_text: and hook being placed eccentrically on the shaft with the point of the hook so
placed as to move, when in operation, as near the centre of the said shaft as
possible, the said hook has the shortest possible travel, and permits a shorter
needle and smaller loop formed thereby to be utilized than though the centre of
the hook, which point coincides with the centre of the bobbin, were at the axis of
the shaft A. The surface of the frame I back of the hook is rounded to cause the
loop to fall to the sides of said frame more easily than if the same were of other
shape. The book engages the loop from the needle and directs its course into the
mouth K as the said device is oscillated, and when the shaft begins the reverse
movement the needle-thread is, drawn out of the mouth K, by means of an ordinary
take up, and entirely around the bobbin-thread, forming the stitch. The bobbin-
case being eccentric on the shaft A, the said bobbin will be nearly all above the
centre of the shaft A during a portion of the revolution; hence the loop will be
much shorter than though the said bobbin were centrally placed on said shaft-
As the loop passes entirely around the bobbin, the bobbin-thread must be encircled
by the said loop and the stitch formed.
By means of the pin F and the set screw holding the same the position of the
hook may be varied, the said pin being the axis thereof, and thus caused to engage
the loop sooner or later in the revolution of the shaft.
Having now particularly described and ascertained the nature of our said
Invention, and in what manner the same is to be performed, we declare that what
we claim is :-
1st Combined with the actuating-shaft, a loop-hook and bobbin-holder mounted
eccentrically thereon, and having a rotary adjustment on the point of connection,
substantially as and for the purposes hereinbefore described, set forth and
illustrated in the drawings annexed.
2nd Combined with the actuating-shaft, a loop-hook having its axis eccentric to
the axis of the said shaft, and having a rotary adjustment on said eccentric
axis, substantially as and for the purposes herein before described, set forth and
illustrated in the drawings annexed.
3rd A cylindrical frame connected integrally at one edge and at a single point to
an edge of a disk, and having an exterior projecting hook and a mouth leading to
its interior, combined with a bobbin loosely contained in said case, substantially as
and for the purposes herein before described, set forth and illustrated in the
drawings annexed.
4th Combined with the actuating-shaft, a disk fixed to said shaft eccentric to its
axis, a cylindrical frame attached to one edge thereof and having an exterior loop-
hook, and a mouth leading to the interior, and a door with a spring-retained pivot
or hinge on one side said case, the whole arranged substantially as and for the
purposes herein before described, set forth and illustrated in the drawings annexed.
Dated this thirteenth day of May 1886