Improvements in Hinged or Jointed Lasts for Boots and Shoes."
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
"Improvements in Hinged or Jointed Lasts for Boots and Shoes."
We, EDWIN BOSTOCK, Junior, of Stafford, in the County of Stafford, Boot & Shoe
Manufacturer, and OLIVER AMMI MILLER, of Brockton, Massachusetts, in the
United States of America, Manufacturer, do hereby declare the nature of this in-
vention to be as follows:-
This invention relates to hinged or jointed lasts and particularly to those of
the kind referred to in the specification of a prior patent No. 3869 of the year 1895
granted to one of us viz:-the said Edwin Bostock. The chief object of the
present invention is to provide means for causing the hinged parts of the last to
be securely held in place so as to be free from lateral movement relatively to one
another and from any tendency of the heel portion to rise when the last is in use,
The said means consist of one or more dowel pins carried by one part of the last
and adapted to fit into corresponding apertures or recesses in the other part.
recess
In carrying our invention into practice we may provide on the front or toe
portion of the last a rearward projection in proximity to the hinge or joint, which
projection carries the aforesaid dowel pin which is adapted to enter a
formed in the contiguous surface of the rear or heel portion of the last. This
dowel pin is advantageously inclined at a slight angle forward, and by reason of
it, as well as the recess into which it enters, being straight, and the movement of
the parts being in a circular path (having its centre at the hinge or joint), it
follows that, as the heel portion is moved about its hinge into position for use,
said dowel pin will press upon the side of the recess that is adjacent to the hinge
or joint first with a gradually increasing pressure, that will force the two parts of
the last together, and then with a gradually decreasing pressure that will allow
the parts to regain the positions in which they were originally fitted, and securely
hold them so. Any accidental lift or rise of the heel portion, or stress sufficient
to cause any dislocation of the hinge or joint, will thus be effectually prevented.
The end of the dowel pin is preferably chamfered to give it an easy start into
the recess.
It is obvious that instead of securing the dowel pin to the projection on the
toe portion of the last and forming the recess on the heel portion, we may, if
desired, fix the dowel pin on the heel portion and provide the recess for its reception
on the said projection of the toe portion. Instead of employing only one dowel
pin and recess we may if desired employ two or more.
It will be readily understood that our invention is applicable to any form of
hinged or jointed last.

page_text: "
Improvements in Hinged or Jointed Lasts for Boots and Shoes."
We, EDWIN BOSTOCK, Junior, of Stafford, in the County of Stafford, Boot and Shoe
Manufacturer, and OLIVER AMMI MILLER, of Brockton, Massachusetts, in the
United States of America, Manufacturer, do hereby declare the nature of this in-
vention 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 hinged or jointed lasts and particularly to those of
the kind referred to in the specification of a prior patent No. 3869 of the year 1895
granted to one of us viz:--the said Edwin Bostock. The chief object of the present
invention is to provide means for causing the hinged parts of the last to be securely
held together so as to be free from lateral movement relatively to one another and
from any tendency of the heel portion to rise when the last is in use. The said
means consist of one or more dowel pins carried by one part of the last and
adapted to fit into or to bind in corresponding apertures or recesses in the other
part, when the two parts are closed together.
In order that the invention may be clearly understood and readily carried into
effect we will proceed to describe the same fully by aid of the accompanying
drawings in which:.
Figure 1 is a side elevation, and
Figure 2 is a plan of a boot last embodying my improvements.
Figure 3 is a longitudinal part section of the boot-last.
and bare the two parts of the last the former of which has a projection a¹
adapted to enter a corresponding recess or cavity in the other. These parts
are hinged together by a block c secured by a screw c¹ to the part b and engaging
in a grooved in the part a, the construction being substantially as in the afore-
said prior patent.
is a screw or pin and
is an annular groove in the block to prevent shifting
of the block c in the groove d.
e is the dowel pin by which the parts of the last are held together, there being
only one such pin in the example shewn. This pin is secured in the projection (¹
of the part a of the last; the upper surface of the said projection being approxi-
mately radial to the hinge block c.
f is the aperture or recess into which the pin e is adapted to enter, this recess
being formed in the part 6 of the last, and constituting a continuation of the hole
in which the dowel pin is fixed.
The movement of the parts a and b being in a circular path having its centre a
at the hinge or joint, and the dowel pin being inclined as described, it follows
that as the said pin enters the aperture it will press upon that part of the.edge
thereof adjacent to the hinge or joint first with a gradually increasing pressure
that will draw the two parts of the last together at the hinge, and then with a
gradually decreasing pressure that will allow the parts to take up the position 4
which they were originally intended to assume when closed, and will hold them in
this position.
In other words as the forward edge of the dowel pin travels along a circular path
indicated by the dotted line f¹ it will bind tightly, against the edge of the hole
in entering the latter, but such binding action will cease when the pin is forced
completely home into the aperture.
By this means if the parts of the last should tend to open or separate when the
said last is in use the dowel-pin will act to resist such tendency.
The end of the dowel pin is preferably chamfered to give it an easy start into
the recess.
4

page_text: It is obvious that instead of securing the dowel pin to the projection on the
toe portion of the last and forming the recess on the heel portion, we may, if
desired, fix the dowel pin on the heel portion and provide the recess for its recep-
tion on the said projection of the toe portion. Moreover instead of employing
only one dowel pin and recess we may if desired employ two or more, and instead
of the dowel pins being all on one part of the last some may be on one part and
the rest on the other part, the recesses being correspondingly arranged.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is:-
1. A hinged or jointed last for boots and shoes having one or more dowel pins,
and recesses to receive said pins, arranged and operating substantially as de-
scribed and for the purposes set forth.
2. A hinged or jointed last for boots and shoes constructed substantially as
described with reference to the accompanying drawings.
HASELTINE LAKE & Co.,
45 Southampton Buildings, London, W.C. Agents for the Applicants.