Improvements in Lock-stitch Shuttle-machines, suitable for Sewing Boots and Shoes.
Year: 1896

page_text: This Print is in accordance with the Original Specification as it stands after
Amendment (under Section 11 of the Patents, &c. Act, 1883) as required by
the decision of the Comptroller General of the 20th day of December 1897.
Date of Application, 19th Oct., 1896
Complete Specification Left, 23rd Mar., 1897-Accepted, 29th May, 1897
PROVISIONAL SPECIFICATION.
Improvements in Lock-stitch Shuttle-machines, suitable for Sewing
Boots and Shoes.
I, HARRY SENIOR ELLIS, of Hope Cottage, Hanover Lane, Leeds, in the County
of York, Draughtsman, do hereby declare the nature of this invention to be as
follows:-
This invention relates to improvements in sewing machines of the kind used for
sewing in the welts of boots and shoes, and for stitching the soles to the welts of
boots and shoes and in which two waxed threads are used, carried respectively
by a curved hooked needle and a shuttle both oscillated in curved paths and
operating behind the work or material to be sewn, which is arranged upon a
yielding work support.
According to my invention the shuttle is constructed in such a manner as to
obviate the necessity for the usual loop opener, the shuttle itself being so formed
as to enter and open the loop of the needle thread: I also dispense with the
separate stripper usually employed to disengage the thread from the hook of the
needle just before the tightening of the stitch; the invention also comprises means
for placing the thread onto the hook of the needle and also for obviating the
wearing or fraying of the thread by its passage over the barbed hook of the
needle whilst the said hook is passing through the material.
The shuttle is nearly cylindrical in shape a part of the circumference being cut
away in such a manner as to form a hook both sides of which are cut away
so that its foremost end terminates in a centrally arranged point which is sufficiently
sharp to enter the loop of the needle thread. The shuttle hook is at a convenient
distance from its pointed end perforated so as to form a stripping device, the
arrangement being such that the needle in its movement enters the perforation
from the underside and passes through it for some distance so that the thread
carried by the needle coming in contact with the hook of the shuttle will be
stripped therefrom and left on the shutile hook to be afterwards tightened in the
material in the usual manner.
The body of the shuttle is provided with a receptacle for holding a cop of thread
which is retained therein by a cover or lid that swivels on a screw on one side and
is retained at the opposite side by means of a bevelled edge on the lid taking into
a bevelled notch in the shuttle, apertures being provided in the said cover for the
thread to pass out through and for giving the required tension thereto.
The shuttle is oscillated in a shuttle box that is provided with a removable cover
which also forms part of the shuttle race the shuttle being driven by a single pin
driver on a boss which receives motion through a pinion secured to the boss and
in gear with a toothed sector on one end of a double armed lever that is mounted

page_text: on a stud secured to the body of the machine, the other end of the lever receiving
motion from a cam on the main shaft.
The curved hook needle is secured to a suitable holder fixed on one end of a shaft
that works in a bearing and to whose other end is secured a toothed pinion which
receives movement from a toothed sector on one end of a double armed lever that
works on a stud secured to the body of the machine, and the other end of which
receives motion from a cam on the main shaft.
For placing or pushing the thread up to or against the needle I construct the
arm of the bell cranked lever that serves as the pushing lever with a forked end
between the limbs of which works a small double ended pushing lever that is
pivoted to the bell crank lever, and one end of which is pulled backward by a
spring which is secured to a pin projecting from the bell cranked lever, the
arrangement being such that the other and free end of the pushing lever is caused
to push the thread against the hooked part of the needle the action of the said
pushing lever being governed by a face cam on the thread guide.
Dated this 19th day of October 1896.
R. E. P. CRAVEN,
Registered Patent Agent,
22, Victoria Chambers, South Parade, Leeds, Agent for the Applicant.
Improvements in Lock-stitch Shuttle-machines, suitable for Sewing
Boots and Shoes.
I, HARRY SENIOR ELLIS, of Hope Cottage, Hanover Lane, Leeds, in the County
of York, Draughtsman, 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:-
This invention relates to improvements hereinafter described and claimed in
the claiming clauses of this specification in sewing-machines of the kind used for
sewing-in the welts of boots and shoes, and for stitching the soles to the welts of
boots and shoes, in which two waxed threads are used, carried respectively by a
curved hooked needle and a shuttle both oscillated in curved paths and the latter
operating behind the work or material to be sewn, which is arranged upon a
yielding work support.
In order that the invention may be properly understood I will in describing it
refer to the accompanying illustrative drawings, which represent mechanism
constructed in accordance therewith.
Fig. 1 is a side elevation and Fig. 2 a front view of a sewing machine of the
kind herein referred to embodying my improvements and suitable for sewing in
the welts of boots and shoes.
Figs. 3 and 4 are respectively a partial elevation, and a partial sectional plan of
the machine drawn to a larger scale than Figs. 1 and 2.
Fig. 4 is a plan of the shuttle alone, according to one construction;
Figs. 5 and 5 are a partial elevation and a partial plan of the shuttle according
to a second construction; and Figs. 6 and 6* are similar views of the shuttle
according to a third construction;
Figs. 7, 8, and 9 show, also to a larger scale than Figs. 1 and 2, the thread giver
and means of placing the thread up to or against the needle:
Figs. 10 and 11; 12 and 13; and 14 and 15 are a series of elevations and corre-
sponding plans showing various positions of the needle and shuttle during the
operation of sewing; and

page_text: Fig. 16 shows the relative positions of the needle and shuttle, as used in a
machine for stitching the soles to the welts of boots and shoes.
The shuttle 1 is nearly cylindrical in shape and oscillates in a shuttle-box 2
provided with a removable cover (see Figs. 1, 3, and 4), which forms part of
the shuttie-race and slides on pins 4 and 5, being retained in position by a catch (
(see Fig. 1) which is normally held in the operative position by a spring 7 located
within a box 8 but which can be withdrawn by a knob 9 to release the cover.
A part of the shuttle I is cut away in such a manner as to form a hook 10, both
sides of which are cut away so that its foremost end terminates in a centrally
arranged point, which is sufficiently sharp to enter the loop of the needle-thread.
The shuttle-hook is at a convenient distance from its pointed end provided with a
perforation 11, as shown in Figs. 5 and 5, or furnished with a recess 12, as
shown in Figs. 6 and 6; or as I prefer is formed with a projection 13 com-
mencing at the point and extending backward some distance thereon, as shown
in Figs. 3 and 4; the shuttle hook thus forms a stripping device, and the
arrangement is such that the needle in its movement will enter the perforation 11
from the under or inner side of the shuttle-hook and pass through it for some
distance, or will otherwise act in conjunction with the stripping device in such
a manner that the thread carried by the needle, coming in contact with the hook
of the shuttle, will he stripped therefrom and left on the shuttle-hook to be after-
wards tightened in the material in the usual manner.
In the body of the shuttle 1 is formed a recess 14 for holding a cop of thread,
which passes through a number of tension-holes 15 in a lid 16, which swivels or
turns on a pin or screw 17 at one side and when closed is held in position at
the opposite side by a bevelled edge 18 that engages in a bevelled notch 19 in
the shuttle.
The shuttle is oscillated in its box by a single pin-driver 20 on a boss 21, which
is mounted in a bearing 22 and kept from moving endwise by a flange 23, and
which receives its motion through a pinion 24 secured to the boss and in gear
with a toothed sector 25 on the end of the lever 26, which oscillates on a stud 27
secured to the body of the machine and receives its motion from a cam 29 on the
main shaft 30.
The needle 31 is carried by a holder 32 (Figs. 3 and 4), to which it is clamped by
means of a plate 32" and a set-screw 33. The holder 32 is fixed on one end of a
shaft 34 that works in a bearing 35 and to whose other end is secured & pinion 36
in gear with a toothed sector 37 on one end of a lever 38 that oscillates on a stud 39
secured to the body of the machine and receives its motion from a cam 40 secured
to the main shaft 30. The needle is guided by a support 42 during its passage
through the work 43.
The needle-thread 44 passes around guide-pulleys and 46 (Fig. 1) carried by
a lever 47 pivoted at 47" and operated by a cam 47b on the shaft 30, and over
guide-pulleys 48 and 48" mounted near the outer end of a thread-tightening
lever 49, which is worked in the usual manner by a cam 49" on the main shaft 30.
From the pulley 48" the thread passes to and through a thread-guide 50 to he
taken hold of by a hook 51 on one arm of a bell-crank lever 52, which moves
laterally a certain distance and pulls forward sufficient thread to form the loop
of the stitch for the shuttle to pass through. The other arm 52 of the bell-crank
lever 52 serves for placing or pushing the thread up to or against the needle and
is constructed with a forked end 53 (see Figs. 9 and 11) between the limbs of which
works a small double-ended pushing lever 54 that is pivoted to the bell-crank
lever 52 and one end 55 of which is pulled backward by a spring 56 which is
secured to a pin 57 projecting from the bell crank lever, the arrangement being
such that the other and free end of the pushing lever 54 is, during the just men-
tioned lateral movement of the lever 52, first forced backward against the action
of the spring 56 by a face-cam 58 on the thread-guide 50, so as to clear the
needle 31 whilst passing it and, after thus passing the needle, is caused by the

page_text: spring 56 to push the thread against the needle so that it can be taken hold of
by the hook of the latter.
The bell-crank lever 52 is mounted on one end of a shaft 59 (Fig. 1) which
oscillates in a bearing 59° and on the other end of which is a pinion 60 in gear
with a toothed sector 61 (Fig. 7) on one end of a rocking lever 62, the other end 63
of which receives motion from a cam 64 secured on the main shaft 30.
The needle 1 is shown in Fig. 3 to be taking hold of the thread 44. After it
has passed through the work 43 with the thread 44 and travelled forward some
distance it returns slightly to meet the shuttle, and the projecting piece 13 of
the latter, coming in contact with the thread 44, lifts or strips it out of the hook
of the needle and deposits it on the point of the shuttle as shown in Figs. 10
and 11 (if the shuttle has the form shown in Figs. 5 and 5 or 6 and 6, it is
likewise stripped by passing through the perforation 11 or into the recess 12
formed in the shuttle-hook); the needle then moves out of the way and the
shuttle proceeds in its forward movement, carrying the needle-thread with it in
its throat 68 into the position shown in Figs. 12 and 13; in which the loop of the
needle-thread surrounds the shuttle-thread and can slip off and with the shuttle-
thread be pulled into the work by the thread-tightening lever 49 as indicated
in Fig. 14.
In a machine for stitching the soles to the welts of boots or shoes the shuttle 1
is arranged as shown in Fig. 16, so as to be below the work, which is placed
against a rest 65. 66 is an awl for piercing the work for the passage of the
needle 31. The operation of threading the needle is the same as in the machine
for sewing-in the welt hereinbefore described.
The shuttle 1 hereinbefore described can advantageously he used with a straight
needle, as in a closing, and a fair stitching machine.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, I wish it to be
understood that I do not claim broadly the use of a shuttle whose point is formed
with a hole or depression into which the needle dips when casting off the thread
and is so shaped as to open the loop and take the thread off the needle and move
it clear of the retiring barb, but I declare that what I claim is:
1. In a lock-stitch shuttle machine suitable for sewing boots and shoes the
hereinabove described nearly cylindrical oscillating shuttle 1, constructed as set
forth and illustrated with the pointed hook 10 adapted to open the loop of the
needle-thread and serve as a stripping device, the arrangement being such that
when the needle-thread is brought by the needle into contact with the hook of
the shuttle it will be stripped thereby from the needle substantially as described
and shown.
2. In a lock-stitch shuttle machine suitable for sewing boots and shoes, a
thread-pusher pivoted to one arm of a bell-crank lever the other arm of which is
used as a thread-giver, the said thread-pusher being operated by a spring and a
face-cam, substantially as described and shown.
3. In a lock-stitch shuttle machine suitable for sewing boots and shoes the
combination of a needle, a shuttle, a combined thread-giver and thread-pusher,
means for operating the said parts and a face-cam for separately operating the
pusher, the whole constructed, arranged, and co-operating substantially as herein-
before described with reference to and shown in the accompanying drawings.
Dated this 22nd day of March 1897
R. E. P. CRAVEN,
Registered Patent Agent,
22, Victoria Chambers, South Parade, Leeds, Agent for the Applicant.