Improvements in Sewing Machine Shuttles.
Year: 1896

page_text: Date of Application, 7th Apr., 1896-Accepted, 23rd May, 1896
COMPLETE SPECIFICATION.
[Communicated from abroad by THE SINGER MANUFACTURING COMPANY, of
New York, in the United States of America, Sewing Machine Manufacturers.]
Improvements in Sewing Machine Shuttles.
1, WILLIAM HARVEY INSLEE, Manager of The Singer Manufacturing
Company, Kilhowie, Dumbartonshire, do hereby declare the nature of this invention
and in what manner the same is to be performed as communicated to me to be
particularly described and ascertained in and by the following statement :-
This invention relates to an improvement in the sewing machine shuttle covered
by Letters Patent No. 14,124 of 189C In the shuttle shown by said patent the
bobbin case is locked to a pin or stud on the shuttle by a spring pressed slide, and
to remove the bobbin-case from the shuttle said bobbin-case is seized between the
thumb and finger nails of the operator so that pressure on said slide, against the
stress of its spring, will release it from engagement with the said stud or pin, and
then the bobbin-case, held by the thumb and finger nails, can be withdrawn from
the shuttle. But when the sbuttie is in the machine, and particularly if the nails
of the operator be very short, more or less difficulty has been experienced in
removing these bobbin-cases from the shuttles, and this difficulty I have obviated
by providing a small lever or pivoted latch having a portion constructed and
arranged to engage a fixed part of the bobbin-case, so that when the free end of
said lever or latch (which is readily engaged by the finger of the operator) is lifted
or swung outward said slide will be forced out of locking engagement with the
shuttle pin or stud, and the said lever or latch will then serve as a handle by which
the bobbin-case can be conveniently removed from the shuttle and by which it can
be held while the bobbin is being removed or inserted.
In the drawings
Fig. 1 is a face view of a shuttle embodying my invention. Figs. 2 and 3 are
sections of the same on line 2-3 of Fig. 1, the lever or latch being lifted in
Fig. 3 to show the slide disengaged from the pin or stud of the shuttle.
Fig. 4 is a detail view of the slide.
A denotes the shuttle provided with the pin or stud b having a reduced portion
or neck formed by an annular groove in said piu or stud, and beyond said neck is
a head the outer surface of which is rounded.
B is the bobbin-case having a central sleeve fitting over the piu b of the
shuttle and having in its outer face au undercut recess receiving a locking
slide and a lever or latch d which may be pivoted to said slide by being
hooked thereto and which has, adjacent to its pivot, a small projection or portion di
which enters a slot or recess in the bobbin-case. The slide c has an opening e of
proper size to admit of the easy passage of the head of the pin b, said opening
being made smaller at one end so as to cause said slide to engage the neck or
reduced part of the said pin when the slide is forced forward into locking position
by the spring 9 which is housed in a recess in the bobbin case and which presses
against a lugfon said slide.
When the bobbin-case is to be removed from the shuttle the operator, by the
pressure of the finger on the free end of the latch or lever d, turns the latter
outward or upward to the position shown in Fig. 3, and the part d' of said latch or
lever, bearing against the inner wall of the slot 62, forces the slide backward against
the stress of the spring 9 and brings the larger part of the opening e in said slide

page_text: into register with the head b¹ of the pin 6 so that the bobbin-case is now free to be
removed from the shuttle, the latch or lever d serving as a handle by which the
said bobbin-case may be conveniently pulled out and held.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. The combination with a sewing machine shuttle provided with a pin or stud,
of a bobbin-case having a slide, a spring which forces said slide into engagement
with said pin or stud to lock said bobbin-case to the shuttle, and a lever or pivoted
latch which is operatively connected with said slide, and which serves, when lifted,
to disengage the latter from said pin or stud and thus permit said bobbin-case to be
removed from the shuttle.
2. The combination with the shuttle A having the pin b, of the bobbin-case
having a recess in its outer face and provided with a sleeve loosely fitting said pin,
the spring-pressed slide c housed in said- recess and adapted to engage said pin to
lock the bobbin-case to the shuttle, and the latch or lever d having a portion d
received in a recess in the bobbin-case and serving, when said latch or lever is
lifted or turned outward, to force said slide out of locking engagement with said
pin, said latch or lever also serving as a handle for said bobbin-case.
Dated this 4th day of April 1896.
WALLACE FAIRWEATHER,
Chartered Patent Agent,
62 Saint Vincent Street, Glasgow, Agent for the Applicant.