An Improvement in Heel Building and Compressing Machines.
Year: 1894

page_text: Date of Application, 19th Mar., 1894
Complete Specification Left, 15th Dec., 1894--Accepted, 19th Jan., 1895
PROVISIONAL SPECIFICATION.
An Improvement in Heel Building and Compressing Machines.
We JOSEPH THOMAS of 21 Blagdon Road Lewisham London S.E. Engineer
and HENRY DELANE RICHARDSON of Nos. 46, 48 and 50 Tabernacle Street
London E.C. Manager do hereby déclare the nature of this invention to be as
follows:-
Our invention is especially applicable to that kind of boot heel building machine
employed in making heels from lifts or sections thereof placed in a mould or die,
and compressed by manual power by the operator with the aid of a lever or handle
bar, or by a wheel fixed to a vertical screw, the foregoing methods being those
usually in vogue for the purpose of pressing the lifts together preparatory to, and
whilst the nails are being driven that hold the heel together, these arrangements
being more particularly common to heel building machines generally known as of
the Robinson and Cutlan types of heel building machine.
Our object is to do away with the heavy labour necessary and now required in
compressing the lifts, also for accelerating the speed of the machine, insuring
uniformity of pressure, and of thickness or height of heel.
We employ a cam on the driving shaft or alternatively upon the hub of the
driving wheel which imparts motion to a connecting rod, at one end of which is
attached a powerful spring supported on a slide bar, at the end of which is mounted
a roller. The other end is connected with a lever which communicates with a
toggle joint, one portion of which is extended to form a handle to be used for
bringing the compression lever forward and straightening the toggle joint, which
then moves forward, depresses the plunger, and compresses the heel.
We increase or diminish the pressure by means of a screw and nut on the
connecting rod.
JOSEPH THOMAS.
H. D. RICHARDSON.
COMPLETE SPECIFICATION.
An Improvement in Heel Building and Compressing Machines.
We, JOSEPH THOMAS, of 21, Blagdon Road, Lewisham, Mechanical Engineer,
and HENRY DELANE RICHARDSON, of Nos. 46, 48 and 50, Tabernacle Street,
Finsbury, Manager, both in the County of London, 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 :-
Our invention relates to boot heel building machines of the kind in which a
series of lifts or sections is placed in a mould or die, and compressed by manual
power by the operator with the aid of a lever or handle bar, or by a wheel fixed
to a vertical screw, for the purpose of pressing the lifts together preparatory to
[Price 277

page_text: and whilst the nails that hold the heel together are being driven, these arrangements
being more particularly common to heel building machines of the kind generally
known as the Robinson and Cutlan types.
The objects of our invention are to do away with the heavy labour necessary for
compressing the lifts in such machines, to accelerate the speed of the machines, and
to insure uniformity of pressure and of thickness or height of heel.
.
According to our invention we employ a can on the driving shaft or upon the
hub of the driving wheel, which cam imparts motion to a connecting rod, on one end
of which bears a powerful spring supported on a slide bar, carrying a roller against
which the cam acts. The other end of the connecting rod is jointed to a lever to
which is jointed one limb of a toggle, the other limb being jointed to the compression
lever and extended to form a handle for straightening the toggle joint and moving
the compression lever forward so as to depress the plunger and compress the
heel.
We increase or diminish the pressure by means of a screw and nut on the
connecting rod.
To enable our invention to be fully understood we will describe the same by
reference to the accompanying drawings, in which :-
: ݂
Figure 1 is a sectional side elevation of so much of a Robinson boot heel
building machine as is necessary to show the application of our invention thereto.:
Figure 2 is a section on the line 2-2, Figure 1:
Figures 3 and 4 are views similar to Figures 1 and 2 respectively but shewing
the parts in different positions:
a is the frame or pedestal of the machine, the driving shaft, e the mould, d the
plunger and the lever connected to the said plunger by a link g; all of which
parts are of usual construction except that the lever f is not adapted to be used as
a hand lever as in the usual Robinson machine.
h is the cam which according to our invention we arrange upon the driving shaft,
and is the connecting rod jointed at its upper end to one arın of a bell-cranked
lever j and having screwed on its lower end a collar against which the spring
bears, the said collar being adjustable on the rod i and locked in position by a
Dut k¹..
m is the slide bar working through a guide bracket n fixed to the frame a and
carrying at its lower end a roller o, against which the cam h acts, and formed at
its upper end with a shoulder P which supports the spring 1.
9, 9 are spiral springs connected at their upper ends to arms rr on the frame a
and at their lower ends to arms s, s on the slide bar m the said springs serving to
normally hold the said slide bar with its shoulder in the position shewn in Figure 2,
in which it will be out of the path of the cam h., These springs q, q may, however,
be dispensed with if the spring is fixed at its upper end to the connecting rod i
and at its lower end to the slide bar m.
t, u are the two limbs of the toggle respectively jointed to the lever j and to the
lever, the limb u being extended to form the handle v. The limbs t, u are
provided with lugs w, w which, when the toggle is operated to extend it, abut and
form a stop to prevent the toggle from being moved so that the three joints thereof
are out of alignment.
The operation is as follows:-The mould having been supplied with the proper
number of lifts and the usual plate c' placed upon the said lifts, the lever vis pulled
down to straighten the toggle, the lever f being thereby moved forwards until the
plunger d comes into contact with the plate c¹ and the lever j and connecting rod i
moved so that the roller o is brought down, say, to the position shewn in Figure 4,
in which it will be acted upon by the cam h. When the said cam acts upon the
roller o the conuecting rod i will be lifted and, through the medium of the lever j
and the straightened toggle, move the lever forwardly sufficient to compress the
lifts. Should the upward movement of the slide bar m, under the action of the
cam h, be in excess of the movement required to be imparted to the plunger d
the spring will yield and so prevent undue strain or pressure upon any part.

page_text: Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1. In a boot heel building machine of the kind described the combination with
the lever operating the plunger, of a toggle arranged in conjunction with a rod
operated by a cam in such a manner that when the toggle is straightened the roller
in connection with the connecting rod will be brought into the path of the cam so
that when the cam acts upon the said roller the plunger operating lever will be
moved, substantially as, and for the purpose, described.
2. In a boot heel building machine having plunger operating mechanism arranged
in the manner referred to in the preceding claiming clause, the combination with
the connecting rod of such mechanism of a spring, substantially as, and for the
purpose, described.
3. The improvements in heel building machines hereinbefore described and
illustrated in the accompanying drawings.
Dated the 18th day of December 1894.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants.