Improvements in Securing together the Soles and Uppers of Boots and Shoes, and in the Connecting Stitch for that Purpose, also Applicable for Securing together other Materials, such as Har- ness and India Rubber Goods.
Year: 1889

page_text: Date of Application, 18th June, 1889-Accepted, 12th Oct., 1889
COMPLETE SPECIFICATION.
Improvements in Securing together the Soles and Uppers of Boots
and Shoes, and in the Connecting Stitch for that Purpose, also
Applicable for Securing together other Materials, such as Har-
ness and India Rubber Goods.
I, WILLIAM CAREY, Machinist of 75 Duke Street in the City of Montreal, in the
District of Montreal and Province of Quebec, Dominion of Canada, 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 consists broadly, in stitching the soles of boots and shoes together
from the inside, thus enabling the manufacturer to produce by machinery a class
of boots which could hitherto only be made by hand and specifically, in the process
of performing such stitching and in the stitch produced.
This process may be briefly described as consisting in forcing through the turned
up edge of the upper and into the sole, in loops at regular intervals, a continuous
length of suitable material such as wire, waxed thread, &c., and in locking the same
in place by driving in from the edge of the sole and at the proper level so as to
pass through the loops, short lengths of wire, bristles or other stiff materials.
In the accompanying drawings forming part of this specification, I show in
Fig. 1 a diagram of mechanism by which the process can be carried out in Fig. 2
a section through a boot sole and upper showing the line of stitching and in Fig. 3 a
section taken transversely to such line.
Similar letters of reference indicate like parts.
The apparatus now to be described is contained within a horn A inserted into the
boot which lies upon it, sole upwards. A head bar B, moving in vertical ways in
the born and operated by the lever C and rod C', to which reciprocating motion is
given by any suitable means, carries an awl D. A bevil wheel E mounted in the
head of the horn A carries the continuous length of material, wire, waxed thread
&c., of which the stitch is formed and is kept stationary by means of a pinion E¹
gearing with it.
At right angles to the path of the awl D is placed a reciprocating slide F¹ carrying
another awl F working through a channel in a gauge plate G, against which the
edge of the sole is set. A shearing device H cuts off from a length of wire a piece
of the desired length, placing it in the channel so as to be acted upon by the
movement of the awl F. I is the turned up edge of the upper, K the sole and K'
Fig. 2 the inner sole. L is the continuous thread, or wire, formed into loops, L¹, L'
passing alternately over the upper, or upper and inner sole, and down into the sole K:
and M, M, are-short lengths of stiff material, such as wire, driven in from the outside
through the loops L³, L³.
The movement of the awl D, forces that part of the continuous thread or wire L,
with which it is in contact, through the upper I and to the desired distance into the
sole K, thus forming a loop which is immediately locked in place by the wire driven
through it by the action of the awl F. As the awls D and F are always in this
same relative position the boot is moved in the line of stitching after each loop is
formed, and the operation repeated, it being obvions that the formation of the
successive loops will keep the stitching at full stretch and secure close and perfect
union of the parts.
It will be seen that by this form of stitch the surface of the sole is perfectly
smooth, and furthermore that the alternate loops, instead of stiffening the sole
and holding it rigidly, as occurs with the loop, or chain stitch, allow of great
pliability, as the top loops L will yield to and follow the bending action of
the foot

page_text: Although specially designed for the manufacture of boots and shoes it will be
obvious that it can be used with greats advantage-in harness making, the manufacture
of rubber goods,.and.in. all cases where a piece of thick leather or other substance
has to be joined to another piece of equal, or less thickness, or with more than two
thicknesses of the same or differing fabrics, in which latter case the looped thread
will pass over the surface of one of the outside thicknesses, or fabrics; and through
any intermediate layers, and be looped into the other outside fabric.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what 1
claim is :-
--
1. The method of securing the soles of boots and shoes to the uppers by driving
through the upper and into the sole, in loops at regular intervals, a continuous
wire or thread, and locking such thread in place by driving in from the
sole edge and through the loops, short lengths of stiff material, substantially as
described.
2. Uniting two or more thicknesses of substance by means of a lock stitch
formed of a continuous thread, alternately looped over the surface of one thickness
of fabric and into. the substance of the other thickness, and lengths of wire, or
other stiff material, driven into the latter substance and through the loops all
substantially, as herein set forth.
Dated this 18th day of June 1889.
ABEL & IMRAY,
Agents for the Applicant.