Improvements in Machines for Shaping the Heels of Lasts.
Year: 1897

page_text: [Communicated from abroad by AMOS G. FITZ, of Auburn, in the County of
Androscoggin, and State of Maine, United States of America.]
Improvements in Machines for Shaping the Heels of Lasts.
I, HENRY EDWARD NEWTON, of the Office for Patents, 6, Bream's Buildings,
Chancery Lane, in the County of London, Patent Agent, do hereby
declare the nature of this, invention to be as follows:--
This invention relates to machines which trim off the stub at the heel of a
last, to a surface whose outline is governed by a pattern attached to the machine,
and the invention consists, primarily, in the combination with a heel-pattern
attached to a last support and rocking therewith, of à series of convex bearing
surfaces corresponding to different sizes.
of
In carrying out this invention, a suitable frame carries a swinging support
for the last pivotted to a pair of swinging arms which project from a sleeve.
on a horizontal rod. A pattern is attached to an upwardly projecting part.
the swinging support, so as to be readily adjustable. Opposite.
on
a series of curved patterns formed
the pattern is
the outer edge
of a disc, which act to change the shape of the heel, to correspond with different
sizes. These patterns may be made to change the shape of the different sizes of
a set in any arbitrary manner desired, but they may be arcs of circles, each of
which, at its middle point, projects beyond, or falls short of, a circle drawn
from the centre of the disc of which it forms part, for a distance equal to the
greatest difference between the desired outline of the heel of that size, and that
which would be given it, if copied direct from the pattern.
A pin in a bell-crank lever enters holes in the disc, and holds the corresponding
curve opposite the pattern. The bell-crank is connected by a rod with a slide,.
to which is also attached, by another rod, a rocking arm carried by the
An arm is rigidly
upwardly projecting part of the swinging support.
attached to this piece, and connected to the rocking arm by a screw.
A support for the heel of the last, which may be adjusted vertically in any,
convenient manner, is carried by the swinging frame.
The circular arcs will in most cases give an approximation to a perfect form
which comes well within the limits of ordinary workmanship, but whenever
found necessary, specially designed curves can be used, which correct a particular
style more closely.

page_text: Improvements in Machines for Shaping the Heels of Lasts.
I, HENRY EDWARD NEWTON, of the Office for Patents, 6, Bream's Buildings,
Chancery Lane, in the County of London, Patent Agent, 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 machines in which a rotary cutter of some sort is
employed to trim off the stub at the heel of a last to a surface whose outline
is governed by a pattern attached to the machine."
Machines of this sort, in which all lasts of a set are trimmed from the same
pattern, are of somewhat complicated description, and the principal object of the
present invention is to provide a machine in which the above-mentioned result
is attained by simpler means.
The invention consists, primarily, in the combination with a heel pattern plate
attached to a last support, and rocking therewith, of a series of convex bearing
surfaces corresponding to different sizes, as hereafter described.
In the accompanying drawings Fig. 1 is a vertical transverse section of the
machine taken on the irregular line XY of Fig. 2 and looking to the left hand.
Fig. 2, is a plan view and Fig. 3 a vertical transverse section similar to Fig. 1,
but looking to the right hand, only the upper portion of the machine being
shown.
In the drawings, F is the frame of the machine;
"
W is a swinging support for the last, pivotted to a pair of swinging arms, A,
which depend from a horizontal sleeve D carried on a horizontal rod E sup-
ported in standards E' suitably connected to the frame F. The pattern plate M
is attached to the upwardly projecting part K of the swinging support W, and
it is so attached as to be readily adjustable upon the part K, relatively to the
support W, both vertically and horizontally, or at any desired angle. The ver-
tical position of M would be adjusted by turning the handle H¹. Opposite the
pattern plate M are a series of curved patterns or guides formed on the outer
edge of a disc M¹ mounted on a stud axle carried by a standard M2, which curved
patterns act, as hereinafter explained, to change the shape of the heel, to corre-
spond with different sizes. Of these patterns, L1, L2, L3, L, are for sizes larger
than the pattern last of a set, and S1, S2, S3, S4, are for smaller sizes, while the
surface L is concentric with the axle and is for the pattern last of a set. These
patterns surfaces or guides may be made to change the shape of the different sizes
of a set in any arbitrary manner desired, but they may be ares of circles, each of
which, at its middle point, projects beyond, or falls short of, a circle, drawn from
the centre of the disc, of which it forms part, for a distance equal to the greatest
difference between the desired outline of the heel of that size, and that which
would be given it, if copied direct from the pattern plate M.
t1, 3, 3, t, are locking holes corresponding to L1, L2, L³, LA.
v, 3, 3, 4, are locking,holes corresponding to S1, S2, S3, S4. A pin m in the
swinging arm 7 enters these holes, and holds the corresponding curve opposite M.
The pin m is lifted out by pressing on the handle H, when any other curve
desired may be brought into position in front of M. The swinging arm Z,
mounted on the stud axle of the disc M¹, is connected by the rod R¹ with the

page_text: slide S. The rod R connects S with one end of a lever B, which is attached
to K by a pivot at P, in the line of centres about which the support. W swings.
A bar C is rigidly attached to K, and connected to B by the screw N which
is turned by the handle H2.
O is a support for the sole or toe of the last, and is carried by the pivotted
carrier O*, which may be adjusted vertically in any convenient manner, so as
to tip up or lower the toe of the last. 0101 are stops which are capable of lateral
adjustment by screw 02 to suit different widths of heel, and the heel of the last
is pressed against them while being cut. T is a rotating cutter (see Figs. 2
and 3), mounted on a shaft T', which is supported in bearings carried by
standards T3 secured to the frame F, and driven by means of the pulley T
keyed thereon. The cutter may be of any convenient construction. That shown
in the drawings has a kind of drunken-saw action.
To make use of the invention, the last is placed on the rest W, and the last
and the pattern M are first adjusted to the same angle. The heel of the last
is then placed upon the outer end of the lever B and the screw N is turned until
the heel of the last will just slip under the rounded end of C (see the dotted
lines Fig. 1). The lever B will thus be rocked, and the resulting motion of B
is transmitted through the rods R, R¹, slide S, and rocking arm Z, to the disc M¹,
which will be moved until the middle point of the governing curve on the peri-
phery of the disc is brought opposite the middle point of that portion of the
curved plate M which will be brought into operation when the last has been
replaced upon W, and pressed against the stops 0101 thus bringing the greatest
amount of correction at the point where it is needed.
The circular arcs shown will in most cases give an approximation to a perfect
form which comes well within the limits of ordinary workmanship, but, when-
ever found necessary, specially-designed curves can be used, which correct a par-
ticular style more closely.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, as communicated
to me from abroad, I declare that what I claim is:-
1. In a machine for shaping the heels of lasts, the combination of a heel-
pattern attached to the last-support, and rocking therewith, with a rocking
correcting pattern disc whose working edge is in contact with that of the heel-
pattern, and has a curvature excentric to the axis about which it rocks, all as
set forth.
2. In a machine for shaping the heels of lasts, the combination with a rocking
last support, of a heel, pattern adjustably attached thereto, and a series of correct-
ing patterns which form parts of the circumference of one disc, and are constrained
to move in operative relation to the heel pattern, all as set forth.
3. In a machine for shaping the heels of lasts, a rocking support for the last,
a heel-pattern attached thereto, a series of correcting patterns turning about
the same centre, a rocking arm, means of attaching the rocking arm to either
of the patterns, a sliding piece, a rod connecting it with the rocking arm, and
a second rod transmitting to it the motion of the rocking support for the last,
all combined with each other, as set forth.
4. In a machine for shaping the heels of lasts, a rocking support for the last,
a heel pattern attached thereto, an arm rigidly attached to the rocking support
above the line of centres about which it rocks, a second arm pivoted to the
rocking support at the line of centres, means of adjusting the distance between
the outer ends of these two arms, to correspond to the heel depths of different
lasts, a correcting pattern, and means of connection between the inner end of the
lower arm and the correcting pattern, all combined with each other, as and for
the purpose set forth.
5. In a machine for shaping the heels of lasts, a rocking support for the last,

page_text: a heel pattern attached thereto, a vertically adjustable support for the toe of the
last, a correcting pattern which is in operative relation to the heel-pattern, and
means, of connection between the last support and the correcting pattern, all as
set forth.