Improvements in Sewing Machines.
Year: 1892

page_text: Date of Application, 19th July, 1892-Accepted, 8th Oct., 1892
COMPLETE SPECIFICATION.
[Communicated from abroad by THE KERN MULTIPLE MACHINE COMPANY,
incorporated under the Laws of New Jersey, of 72, Mechanic Street, City of
Newark, State of New Jersey, United States of America.]
Improvements in Sewing Machines.
1, HENRY HARRIS LAKE, of the firm of Haseltine Lake & Co., Patent
Agents, 45 Southampton Buildings, in the County of Middlesex, 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:-
.
My invention relates to combinations of mechanism in a duplex sewing machine
whereby the following results are accomplished:
The stitching hy one of the sewing mechanisms may be arrested thereby
facilitating the turning of corners.
Either shuttle may be readily removed or inserted.
Without disconnecting the driving connections of the shuttles, one may be moved
back from the other beyond its sewing position and into such position as to render
both readily accessible.
The shuttle on being moved forward is automatically located and held in proper
position to co-operate with its needle.
In the accompanying drawings,
Figure 1 is an inverted plan view of the machine with both shuttles in sewing
position.
Figure 2 is a longitudinal section on the line of Figure 1 through the bed
plate and the bearings connected therewith, omitting the representation of the
bracket arm.
Figure 3 is a detail of one shuttle in sewing position and the other moved back,
partly in section.
Figures 4, 5 and 6 are details, in longitudinal section, of the shuttle showing the
needle in different positions.
Figure 7 is a detail showing the needle and deflecting finger and shuttle with the
bobbin and bobbin-case removed.
Figure 8 is a detail showing the deffection of the needle enlarged.
Figures 9 and 10 are face views of the two shuttles respectively, and the parts
immediately surrounding them.
and
Figure 11 is a detail of the connections of the shuttle shafts.
Figures 12, 13 and 14 are diagrams to illustrate the method of turning corners,
Figure 15 is a detail of the spring retaining member hereinafter described.
In all these figures the same letters and numerals are used to indicate corre-
sponding parts.
a is the table of the machine. is the presser foot. c is the needle-bar. d is the
needle. e is the shuttle-shaft. 2 is the shuttle. g is the connecting-rod for driving
the shuttle-shaft e. g is the feed-bar.
The foregoing parts as well as the bobbin, the bobbin case, the shuttle and-
mechanism for giving motion to the same, are constructed and arranged as in an
ordinary rotating shuttle machine heretofore used.
Upon the needle-bar is clamped a piece that projects forward of the needle-bar
and is provided with a slot in which slides a needle-clamp h¹ for securing the
needle at varying distances from the needle d, depending upon the position of the

page_text: clamp in the slot. The presser-foot is broadened and provided with a supple-
mental throat for the passage of the needle i. Different presser-feet presenting
different distances between the needle throats are provided for each adjustment of
the needle i.
is
Through the table of the machine are bored throats each one of which is
vertically beneath a possible position of the needle i. The divided shaft
mounted in suitable bearings a¹ a depending from the table of the machine. It
is provided with a telescoping joint, as shown, and is driven by the same connecting-
rod which drives the shaft e.
9
The slotted arm g' on the shaft e and the slotted
arm on the shaft leach receives in its slot a pin projecting from the connecting-
rod g so that the two shafts are driven in unison. m is a supplemental table lying
in the same plane as the table a from which depend the lugs m¹ and m² provided
with bearings for the shaft which projects forward, as shown.
n is a shaft mounted above shaft in the lugs m', m² and which is driven from
the shaft by the gears and n². This shaft n is in alignment with the shaft e,
and at the end of the shaft n adjacent to the shuttle already referred to, is placed a
second shuttle s facing in the opposite direction to the first named shuttle s".
It is evident that the movable shuttle being adjusted in the proper plane to
co-operate with the needle the operation of the machine will result in the
production of two parallel seams.
m³, is an extension of the supplemental table into a recess between the extensions a³
and a of the main-table. m is a U-shaped lug depending from the extension m³,
within which are the parts for driving the shuttle. Provision is made for moving
the adjustable shuttle apart from the stationary shuttle by mounting the supple-
mental table m to slide upon a frame consisting of the rods o and o' and the cross
piece o projecting horizontally from the table a to which the frame is firmly secured
by having the rods o and o¹ bolted to cars o' and of fixed upon the underside of the
table a.
The rods o and o¹ pass through cars p and pl on the under side of the
supplemental table m so as to admit of the longitudinal sliding of the supplemental
table upon these rods from the position shown in Figures 1 and 2 to that shown in
Figure 3.
The telescoping or sliding joint already referred to between the parts of the
shaft permits of the table m being slid from one position into the other without
destroying the operative connection between the shaft n and the connecting-
rod
9.
is a latch pivoted to the side of the supplemental frame m and provided with a
notch that engages with a projection on the side of the frame a when the table m
is in the position shown in Figure 1. The position of this latch is made adjustable
on the table m so that the position of the notch may always be made such as to
bring the movable shuttle properly under the needle for any adjustment of the
said needle. This latch therefore, when once adjusted, serves to automatically
space the two shuttles to correspond with the spacing of the two needles.
I will next describe the mechanism by which the shuttle bobbin is held in place.
It is the same for both the bobbins, and therefore a description of one will answer
for both.
The shuttles is actuated alternately by pins, one of which is shown at 83.
It runs in a circular guideway between the lips and the circular face-plates.
From the centre of the shuttle projects the tubular bearings upon the exterior of
which is, mounted the bobbin s and the interior of which constitutes a bearing for
the inverse arbors upon which is secured the bobbin-cases. This bobbin-case
carries the usual upwardly extending finger 0 provided with the spring s
Across outside of the fingers extends a spring retaining member t which is secured
at one side by the screw t to a stationary part, and extends across and beyond the
fingers, as shown in Figure 9. The form of this retaining member is shown in
plan view in Figure 15 and is such that the finger so is held within a corrugation
from which it may be removed by pressing it to the left (Figure 9) so as to cause it
to raise the spring-retainer to pass out from under it. When it is desired to insert

page_text: the bobbin-case 5, it is placed in position with the fingers to the right of the
spring-retainer and then pushed under that retainer which is facilitated by the
upward curvature t³ toward the end of the retainer. The strength of the spring-
retainer t is such that when the finger 10 is lying in the corrugation 2, it will be
held from rotating as the machine operates.
I will next describe the means by which the stitching by one of the sewing
mechanisms may be arrested whilst the other continues.
is a finger which is pushed forward so that when the needle is down the finger
lies substantially in the vertical plane between the needle and the shuttle-horn or
loop-taker u. When the stitching mechanism is in normal operation, every time
the needle descends, as shown in Figure 4, the loop which it leaves in the cloth is
caught by the hook or horn and held and disposed of thereby in the well known
manner necessary for the formation of a stitch. The finger q, in its forward
position, intercepts the normal path of the needle and the finger is inclined laterally
toward the top, as shown in Figure 8, on the side next the needle so that the needle
in its descent will impinge against this incline and be deflected away from the point.
of the shuttle.
The thread extending from the eye of the needle on the side next the shuttle up
to the fabric, will lie between the needle and the finger 7, as shown in Figure 6, so
long as the needle remains down, in which position it is impossible for the horn u to
engage it, and the horn therefore passes the needle without engaging the thread,
and when the needle ascends it carries the thread up and out of the fabric. When,"
therefore, the sewing of either needle is to be suspended, the finger is thrust
forward and when the sewing is to be resumed it is retracted, there being a
corresponding finger for each needle and shuttle.
To mount and operate the finger, it will be found convenient to form the finger
on the extremity of a slide held in stationary guideways. In order to make these
conveniently operative by the operator on the same side of the machine, the slide
for one shuttle is mounted somewhat differently from that for the other. Thus, in
Figure 9, the finger y constitutes the extremity of a slide q¹ mounted between the
extremity of the face-plate and a stud q2 engaging with a notch of the slide, as
shown. The rear of this slide is pivotally connected to the extremity of a hand-
lever on the side of the machine next the operator, by moving which the finger
may be operated. In Figure 10 the finger 7 constitutes the extremity of a slide q*
which is held behind the extremity of the face-plates and extends around the
outside of the face-plate and is pivoted to a hand-lever q³ on the side of the machine
next the operator. The movements of the slide are further governed by the
pin q moving in a slot of the stationary projection q' and by the stationary pin g
which projects through a circular slot in the slide, as shown. A spring may be
employed to assist the lever 9' in retracting the finger.
One way of utilizing the means just described for arresting the stitching operation
of one sewing mechanism, is illustrated in Figures 12 to 14.
Suppose the two needles have sewn seams in the direction of the arrow
(Figure 12) to the points and and it is desired that the corner shall be
turned.
The feed is now continued until the needles have advanced, respectively, to v²
and but before the inside needle is advanced from v to its finger q is thrust
forward so that no stitches are made by it. The operation of the machine is now
suspended and the work is revolved from the position shown in Figure 12 to that
shown in Figure 13. This brings the inside needle from 3 to ', the outside needle
remaining at. Then the operation of the machine is resumed and the needles
advance in the direction of the arrow (Figure 13) to u and v³ respectively, the
outside needle producing the ordinary stitches and the inside needle producing
merely a series of punctures without stitching, as shown in Figure 14.
As soon as
the inside needle reaches the point v, its finger is retracted and the stitch forming
mechanism is thrown into operation and the two needles sew on in the direction of
the arrow, in the ordinary manner.

page_text: Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, as communicated to me by
my foreign correspondents, I declare that what I claim is:-
1. In a sewing machine the use of a finger whereby the needle thread may be
pushed out of position to prevent the engagement thereof by the loop taker.
2. In a duplex sewing machine having means whereby the stitching by one of the
sewing mechanisms may be arrested, the mounting of one of the shuttles on a
carriage having a range of movement to and from the sewing position, substantially
as described.
3. In a duplex sewing machine having means whereby the stitching of one of the
sewing mechanisms may be arrested and having one of the shuttles mounted upon a
carriage with a range of movement to and from the sewing position, the connecting
of said shuttle with the main shaft by means admitting of the range of movement
referred to without disconnection, substantially as described.
4. In a duplex sewing machine having means for arresting the stitching of one
sewing mechanism and having one of the shuttles mounted, upon a carriage with a
range of movement to and from the sewing position, the use of a latch whereby the
said shuttle is located in a sewing position, substantially as described.
5. In a sewing machine having means for arresting the stitching of the sewing
mechanism by pushing the needle thread out of the way of the loop taker the use of
a curved spring member to hold the shuttle in position and admit of its convenient
insertion or removal, substantially as described.
6. As a method of turning corners with a duplex sewing machine, arresting the
stitching of the inside sewing mechanism as it is crossing the space between the two
lines of stitches.
7. In a sewing machine, the use of a deflector on the side of the needle next to
the loop taker whereby the needle is deflected away from the loop taker, sub-
stantially as described.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.
COL TO
דיר ndק