Improvements in Boot Sole Rounding Machines.
Year: 1894

page_text: Date of Application, 20th Feb., 1894
Complete Specification Left, 20th Nov., 1894-Accepted, 22nd Dec., 1894
Improvements in Boot Sole Rounding Machines.
I, WILLIAM HENRY DORMAN, of The Hawthorns, Newport Road, Stafford in
the County of Stafford, Engineer, do hereby declare the nature of this invention
to be as follows:-
The sole to be rounded is clamped fast.-preferably in a horizontal position, -
between a pattern sole plate and a holding down plate. The pattern sole plate is
dropped upon dowels supported on a bridge upon a table and the table has an
elongated or somewhat oval shaped groove formed in its under surface, which
engages two rollers mounted in a knife carriage which by the operation of the
machine is thus caused to move around the sole in a path parallel to the table
groove.
The sole rounding knife has a vertical edge and a shoulder or projecting surface
which bears against the edge of the pattern sole plate.
To allow of the knife following the contour of the edge of the sole pattern plate
which differs from the shape of the table groove, it is vertically pivoted in a slide
carried in the knife carriage and is kept forward against the edge of the sole
pattern plate by a lever and spring carried upon the knife carriage.
A hand lever and link are arranged for the purpose of withdrawing the knife
from the sole edge. The knife carriage is moved around the sole by a radial arm
turning about the vertical stem which supports the table and is operated by a pair
A slide is mounted so as to
of bevel wheels from the driving shaft of the machine.
move radially in this arm and is provided with a vertical pivot on which the knife
carriage mounted.
The holding down plate is provided with recessed holes which engage notched
dowel pins (one of which is provided with a spring) carried in an inverted U frame
which is suspended above the pattern form plate by a spring supported stem to the
lower end of which the inverted U frame is jointed, the stem being carried in the
machine head frame.
The machine is driven by a belt pulley and friction cones which are put in gear
by a treadle and sliding wedge arrangement being there maintained by a spring
catch. The same movement of the treadle which starts the machine also brings a
spring pressure, capable of regulation, to bear upon the holding down plate for
securing the boot sole. When the rounding operation is completed a projection on
the bevel wheel or on the radial arm trips the spring catch so as to release the
treadle which by means of a spring withdraws the wedge, releases the hold down
and applies a friction brake so as to stop the machine.
A handle is provided for the operator to stop the machine where desired.
The whole is supported upon a convenient pillar or frame.
101
W1
1001

page_text: Improvements in Boot Sole Rounding Machines.
I WILLIAM HENRY DORMAN, of The Hawthorns, Newport Road, Stafford, in
the County of Stafford, Engineer, 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:-
The sole to be rounded is clamped fast in the machine, by the action of a treadle,
between a pattern sole plate, which is of the same outline as the rounded sole, and
a holding down plate.
The pattern sole plate is dropped upon dowels and supported on a bridge upon a
table and the table has an elongated or somewhat oval shaped groove formed in
its under surface which engages two rollers mounted in a knife carriage which by
the operation of the machine is caused to move around the sole in a path parallel
to the table groove.
The sole rounding knife has a vertical edge and a shoulder or projecting surface
is provided, either upon the knife or block which carries it, which bears against the
edge of the pattern sole plate.
To allow of the knife following the contour of the edge of the sole pattern plate,
which naturally differs more or less from the shape of the table groove, it is
pivoted in a slide carried in the knife carriage and is kept forward against the
edge of the sole pattern plate by a lever and spring carried upon the knife
carriage.
A hand lever and slotted link are provided for the purpose of withdrawing the
knife from the sole edge when desired.
The knife carriage is moved around the sole by a radial arm turning about the
vertical stem which supports the table and is operated by a pair of bevel wheels
from the driving shaft of the machine.
A slide is mounted so as to move radially in this arm and is provided with a
vertical pivot on which the knife carriage is mounted.
The holding down plate-so that it may be readily removed is provided with
recessed holes which engage notched dowel pins-one of which is provided with a
spring carried in an inverted U frame which is suspended above the pattern form
plate from a spring supported stem to the lower end of which the inverted
U frame is jointed, the stem being carried and guided in the machine head frame.
The machine is driven by a belt pulley and friction cones which are put in gear
by a treadle and sliding wedge arrangement being there maintained by a spring
catch.
The same movement of the treadle which starts the machine also brings, through
suitable connections, a spring pressure-capable of regulation-to bear upon the
holding down plate for securing the boot sole.
When the rounding operation upon the boot sole is completed a projection on
the bevel wheel trips the spring catch so as to release the treadle and allows a
spring, provided for the purpose, to withdraw the wedge and apply a friction brake
so as to stop the machine. The releasing of the treadle also liberates the hold
down.
A handle is provided for the operator to stop the machine where desired and a
subsidiary handle may be applied by which the machine may be started without
operating the hold down.
A pillar and bead frame support the various parts.
This invention is illustrated by the accompanying drawings in which :-
Fig. 1. is a side view of the machine.
Fig. 2. is a front view of the same.
2
. 1.

page_text: Fig. 7. is the frame for carrying same.
Fig. 8. is a much enlarged plan of the knife and block.
Fig. 9. is an elevation of the same.
Figs. 10 and 11. shew the hand lever.
Fig. 12. shews a spring catch.
A. is the pillar B. the head frame and C. the driving shaft of the machine.
The driving pulley D. is mounted loosely upon the shaft C. and is adapted to
engage with the friction cone E. which is secured upon the shaft C.
The starting treadle F. is pivoted to the pillar upon the stud G. and its rear
end H. has a vertical hole I. through which passes the rod J. Upon the rod J.
are adjustable nuts K. under which when the treadle is operated the end H. takes
so as to raise the rod J. On the top of the rod J. is the wedge L. which takes
against the block M.-mounted loosely upon the shaft C. When the wedge L. is.
raised the block M. presses the pulley D. against the cone E. so as to drive the
machine and when the wedge L. is withdrawn the spring N. forces the pulley D..
away from the cone E. and the machine stops.
The driving shaft C. passes through the frame B. in the bearing O. formed
therein aud is provided with the pinion P. which engages the wheel Q. so as to-
revolve the same upon the fixed vertical stem R. which supports the table S.
The sole T. to be rounded (a portion of which is shewn in Fig. 9.) is clamped
fast between the pattern plate U.-which must be of the same shape as the sole is.
desired to be rounded-and the holding down plate V.
The pattern plate U. is dropped upon dowels W. in the bridge X. which, is
supported on the table S. in the underside of which is formed the groove Y. running
parallel to the outside edge % of the table S. Two rollers a. and a mounted in the
knife-carriage a² engage the groove Y. and the knife carriage a² is moved around
the table S. in a path parallel to the groove Y. as follows:
The before mentioned wheel Q. is provided with a radial arm a³ in which is
mounted so that it may move radially a slide a to which is pivoted on a pin a³ the-
knife carriage a².
The sole rounding knife b. has an edge b' (see Figs. 3. 5 and 8.) and a shoulder
or projecting surface 2 is provided upon the knife block 3 which bears against the
edge of the pattern plate U.
To allow of the knife b. following the contour of the edge 6 of the plate U..
which naturally differs more or less from the shape of the table groove Y. it is
pivoted on the pin in the slide 66 which is mounted in the aforesaid knife
carriage a² and the knife b. is kept forward against the edge of the plate U. by
a lever spring 68 and rod carried upon the knife carriage a². The hand
lever c. mounted upon the screw c³ in the knife carriage a² and provided with the
slotted link which engages the pin in the slide 68 serves to withdraw the
knife b. from the sole edge when desired.
The holding down plate V. is-so that it may be readily removed-provided
with recessed holes d. d¹ (see Fig. 6.) which engage notched dowels & d³-the
one d³ being made with a spring d-carried in the frame d³ which is suspended on
the joint pin d from the stem d².
The stem d is guided in the head frame B. in bearings d³ d' and is provided
with the guide arm 10 to prevent turning, its weight being supported on the
spring d
The starting treadle F. also operates the holding down plate V. as follows:-
The hold down lever e. is mounted on the pin e' in the head frame B. and is
jointed to the rod e² which passes downwards to the treadle F. and is provided at
its lower end with the spring e³ which rests upon the treadle F. The force of the
springe can be regulated by the adjusting nuts e and its use is to accomodate
varying thicknesses of soles as well as to compensate for wear of the machine.

page_text: When the treadle F. is depressed the spring
is raised and bears up the rod e*
so as through the lever e. and stem d to press down the holding down plate V upon
the boot sole T. and hold it firmly against the plate U.
It will be observed in the drawing (Fig. 1.) that there is a considerable space
between the end H. of the treadle and the nuts K. This space allows the move-
ment of the treadle F. to actuate the hold down before the end H. comes into
contact with the nuts K so that the boot sole T. is always firmly cramped before
the machine is set in motion.
When the treadle F. is fully down and the machine started the machine is kept
in motion by retaining the treadle F. by means of the spring catch f. which
engages the arm f' provided on the treadle F. for the purpose. The catch fis
mounted on the vertical shaft which is carried in bearings f f upon the
pillar A. and upon the same shaft is also mounted an arm which is pressed
upon by a spring f carried upon the pillar A. and tending to turn the shaft f' so
as to cause the hook f of the catch f. to spring outwards and hold fast the
treadle F. whenever the edge comes behind the hook f.
For the purpose of automatically stopping the machine when the sole rounding
operation is completed the wheel Q. is provided with the projection 7 which at
every revolution of the wheel and consequently at every completed rounding
operation comes in contact with another projection g¹ formed upon the lever g¹
which is carried upon the upper end of the shaft 2. The projection g. moves
outwards the lever 92 and by turning the shaft in opposition to the spring f
withdraws the catch f. and frees the treadle F. which assisted by the weight of the
hold down lever e. and rod e2 drops at its rear end H. thus releasing the rod J.
which is pulled down by the spring g³ so as to withdraw the wedge L. and the
machine stops, and at the same time the stem d being freed from the pressure of
the lever e. is raised by the spring d" and lifts the holding down plate V. away
from the boot sole T.
To ensure the prompt stopping of the machine when the wedge L. is withdrawn
the brake wheel h. is provided on the driving shaft C. being engaged by the
brake which enters the groove h² formed in the wheel h. and being carried upon
the rod J is pulled down therewith by the action of the spring g³ so as to bear
upon the outer edge 3 of the groove 2 and stop the machine.
So that the operator may be able to stop the machine in any desired position the
handle i. is provided upon the lever g² and by moving this outwards the machine
may be stopped in a manner precisely similar to the automatic stopping just
referred to.,
The subsidiary hand lever j. is provided so that the machine may be set in motion
without operating the hold down. It is mounted on a pivot j¹ in the pillar A and
When
operates the wedge L. by taking against the nuts provided on the rod J.
the handle is depressed it is retained down by the catch (see Fig. 12.)
provided upon the upper end of the spring f and engaging a piece upon the
lever j. The tripping of this catch is accomplished by the same movement of
the lever g² already described for releasing the treadle F. the arm f pushing the
spring and catch j inwards from engagement with the pièce j and so releasing
the lever j.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :
The machine for rounding the soles of shoes constructed and operated as herein
described and illustrated.