IMPROVEMENTS IN MECHANISM FOR PLACING, HOLDING, AND EJECTING BOBBINS IN SEWING MACHINES
Year: 1885

page_text: I, WILLIAM PHILLIPS THOMPSON, Fel. Inst. P.A. of the Agency for Foreign Patent
Solicitors, 6, Lord Street, Liverpool, in the County of Lancaster, and 323, High
Holborn, in the County of Middlesex, Civil Engineer, do hereby declare the nature
of the said invention for "IMPROVEMENTS IN MECHANISM FOR PLACING, HOLDING,
AND EJECTING BOBBINS IN SEWING MACHINES" (A. communication from abroad by
Charles Miehling and Charles Miehling both of New York City, County, and State,
in the United States of America,) and in what manner the same is to be performed,
to be particularly described and ascertained in and by the following statement:--
The invention relates to the parts of a sewing machine employed in placing,
holding and ejecting the bobbin, and has for its object to provide simple means by
which an empty bobbin may be removed from the bobbin holder and a full bobbin
introduced and securely held, in sewing machines that employ disc bobbins like the
bobbins used in the Wheeler and Wilson sewing machine and that employ bobbins-
holders like the bobbin-holders of the Wheeler and Wilson machine.
The invention consists of the mechanisms hereinafter described and claimed.
The invention is shown on the accompanying drawings where Figure 1 is a side
elevation of part of a machine showing the improvement, and Figure 2 is a front
elevation of the same partly broken away. Like letters of reference indicate like
parts. Figure 1 shows in full and in dotted lines the two positions of the parts
assumed in use.
A is the bed-plate of the machine having the usual front slide B. C is the hook
carried on the shaft D. E is the bobbin-holding block and drop the block e¹ being
carried on the usual slide of the frame and secured by the usual set screw, and the
drop e having the usual spring to bear against and hold the revolving bobbin. The
pivoted bobbin-holder or drop e is hinged to the block e' in the usual way and
adapted to drop forward permitting of the introduction or removal of a bobbin.
This pivoted bobbin-holder has heretofore been held up in place against the
confined bobbin by a spring catch and lever, adapted to be directly operated by
the hand, when the removal or introduction of a bobbin was desired. The present
improvement does entirely away with this, substituting therefor the apparatus
about to be described.
F is a bent rod. At one end it is pivoted to the upper part of the bobbin-
holder e. At the other end it passes through an opening cut in the slide B, as

page_text: shown, after which it is bent downward sharply and terminates in any convenient
form to be handled. The inner curve of the bend referred to has two deep notches
cut in it, so placed that when the pivoted bobbin-holder e is in its vertical position
the rod F will rest upon the plate B at one of these notches, and when the pivoted
bobbin-holder e has fallen forward and is in its lowest position, the rod F will rest
upon the plate B at the other of these notches. The effect of the notches is to lock
the rod F and so the pivoted bobbin-holder e in either of its two positions as desired
when the rod F is held down with its lower or notched surface in contact with and
resting upon the slide plate B. The rod F is so held down in the form of apparatus
shown in the drawings, by the coiled spiral spring G. Any spring may be used
that will accomplish the purpose, and the device will operate, though not so reliably,
without any spring at all particularly if the opening in the slide plate B is made
small, and the notches in the rod F are cut deep. The form of spring shown, is
preferred however as being the most convenient in use and as reliably locking the
drop in place.
The slide B has a hole cut in it large enough to permit of the easy passage of the
bobbins and has a funnel N to guide the bobbins into place against the hook.
When it is desired to open
The operation of the improved device is as follows.
the bobbin-holding device either to eject an empty bobbin or to introduce a full
one, the rod F is raised at its outermost extremity by the finger of the operator.
This throws the pivoted bobbin-holder forward opening the bobbin-holding device.
When it is desired to close the same the end of the rod F is struck a light blow
downward and a little in toward the plate, by the hand of the operator.
pivoted bobbin-holder will be found to be driven up into place and locked by the
Care should be taken
notch in the rod F, and the machine will be ready to run.
to open the bobbin-holding device when the needle is in its lowest position, and to
introduce a new bobbin through the funnel N only when the needle is in its highest
position.
The
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, I declare that what
I claim is
1. In a sewing machine the notched rod F, passing through an opening in the
plate, and the pivoted bobbin-holder e, in combination with the revolving hook and
bobbin, substantially as and for the purposes set forth.
2. In a sewing machine the notched rod F, passing through an opening in the
plate, the pivoted bobbin-holder e, and the spring G, in combination with the
revolving hook and bobbin, substantially as and for the purposes set forth.
3. In combination with the revolving hook and bobbin of a sewing machine, the
notched rod F, and pivoted bobbin-holder e, and the plate B and funnel N, substan-
tially as and for the purposes set forth.
4. In combination with the revolving hook and bobbin of a sewing machine, the
notched rod F and pivoted bobbin-holder and spring G, and the plate B and
funnel N, substantially as and for the purposes set forth.
5. In a bobbin placing device the funnel N in combination with the plate of the
sewing machine having a suitable opening over the revolving hook substantially as
and for the purposes set forth.