Improvements in Machines for Lasting and Tacking Boots and Shoes.
Year: 1895

page_text: Date of Application, 13th Apr., 1895
Complete Specification Left, 10th Jan., 1896-Accepted, 15th Feb., 1896
PROVISIONAL SPECIFICATION.
Improvements in Machines for Lasting and Tacking Boots
and Shoes.
I WILLIAM HENRY DORMAN, of The Hawthorns, Newport Road, Stafford,
Engineer, do hereby declare the nature of this invention to be as follows:-
This invention has for its object improvements in machines used for tacking the
uppers of boots and shoes during the operation of lasting the same and is particularly
applicable to the machine generally known as the "Magnetic Tacker."
Hitherto this machine has been constructed in such a way that it has served to
support the boot and to supply and drive the lasting tacks only and has not
assisted the operator in drawing over the upper upon the insole but the operator
has had to draw over the upper into place by means of pincers and hold the same,
either with the pincers or with his fingere, while the lasting tacks have been
driven.
In order that the machine shall more efficiently assist the operator in performing
the lasting operation I provide a presser foot which is operated by the machine so
as to come down upon the edge of the upper and draw over and hold the same
while the lasting tack is driven, after which the presser foot is raised so as to free
the boot which the operator then moves forward into a new position ready for the
presser foot to again operate and another tack be driven.
The presser foot may be made to terminate in a fork shaped end which engages
the upper around the part where the hammer is to strike and is carried upon &
spring presser foot bar so as to yield to variations in the height or substance of
the boot upper. The bar is carried in a pivotted frame which is moved up and
down by the action of the machine and provided with guides to maintain it in the
desired path. The up and down movement of the presser foot may be conveniently
derived from the crosshead which operates the hammer.
The action of the foot to draw over the upper upon the insole may be derived
from a cam slot formed in the pivoted frame which engages a roll carried upon
some fixed part of the machine frame.
To ensure that the presser foot shall lift clear of the upper in a vertical direction
I provide a pawl upon the pivoted frame which takes into ratchet teeth in the
presser foot bar so that the latter shall lift immediately the return action of the
hammer crosshead commences and before the cam slot comes into action to return
the presser foot to its inward position. This pawl is liberated so as to set free the
presser foot (before the completion of the upward movement of the pivoted frame)
by the action of the cam slot causing the pawl to come into contact with a releasing
bar which is placed in a suitable position for the purpose.
Dhis 11th dar of Anril 1895

page_text: COMPLETE SPECIFICATION.
Improvements in Machines for Lasting and Tacking Boots
and Shoes.
I WILLIAM HENRY DORMAN, of The Hawthorns, Newport Road, 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:-
This invention has for its object improvements in machines used for tacking the
uppers of boots and shoes during the operation of lasting the same and is particularly
applicable to the machine generally known as the "Magnetic Tacker."
Hitherto this machine has been constructed in such a way that it has served to
support the boot, and to supply and drive the lasting tacks only and has not
assisted the operator in drawing over the upper upon the insole but the operator
has had to draw over the upper into place by means of pincers and hold the same,
either with the pincers or with his fingers, while the lasting tacks have been
driven.
In order that the machine shall more efficiently assist the operator in performing
the lasting operation I provide a presser foot which is operated by the machine so
as to come down upon the edge of the upper and draw over and hold the same
while the lasting tack is driven, after which the presser foot is raised so as to
free the boot which the operator then moves forward into a new position for the
presser foot to again operate and another tack be driven.
The presser foot may be made to terminate in a fork shaped end which engages
the upper around the part where the hammer is to strike and is carried upon a
spring presser foot bar so as to yield to variations in height or in the substance of
the boot upper. The bar is carried in a pivoted frame which is moved up and
down by the action of the machine and provided with guides to maintain it in the
desired path. The up and down movement of the presser foot may be conveniently
derived from the crosshead which operates the hammer.
The action of the foot to draw over the upper upon the insole may be derived
from a cam slot formed in the pivoted frame which engages a roll carried upon
some fixed part of the machine frame.
To ensure that the presser foot shall lift clear of the upper in a vertical direction
I provide a pawl upon the pivoted frame which takes into ratchet teeth in the
presser foot bar so that the latter shall lift immediately the return action of the
hammer crosshead commences, and before the cam slot comes into action to return
the presser foot to its inward position. This pawl is liberated so as to set free the
presser foot (before the completion of the upward movement of the pivoted
frame) by the action of the cam slot causing the pawl to come into contact
with a releasing bar which is placed in a suitable position for the purpose.
My invention is illustrated by the accompying drawings in which :-
Fig. 1. is a front view of a portion of the head of the machine known as the
Magnetic Tacker" and shewing my improvements. The hammer and presser foot
being raised.
66
Fig. 2 is a side view of the same.
Fig. 3 is an enlarged side view. The presser foot being shewn nearly down and
the hammer ready to descend.
Figs. 4 and 5 are details.
The presser foot a, which may have a single serrated foot or may be formed
with a fork a', engages the upper a at one side of or around the part where the
bammer is to strike and is carried on the lower end of the bar a' which is
free to slide vertically in guides as a and is furnished at its upper end with an
arn a' and guide pin a sliding in a guide a to prevent the bar a² from
turning. The spring as takes under the guide a* and at its lower end presses

page_text: upon the adjustable collar a so as to force down the foot a upon the boot
upper x.
The aforesaid bar a' by means of its guides a³at is carried in the pivoted
frame c which is moved up and down by the action of the machine as follows:-
―
The beam d is mounted on the pivot d in the machine frame e and operates
the hammer b in the ordinary manner by means of the links & d', crosshead d and
springs d³ do.
I provide a lug f upon the crosshead d to receive a vertical sliding bar f¹ which
is free to move up and down in guides f f carried on the frame e.
The bar moves with the crosshead and carries the frame c up and down
with it by means of the lower arm f' and the upper arm f.
The beforementioned frame c is mounted on a pivot in the lower arm f' and
has a slot formed in its upper end engaging a pin in the upper arm f³.
The pin c is formed with a head c and acts as a steady to the upper end c³ of
the frame c while the slot callows the frame to swing a little on the pivot o'.
The swinging movement of the frame c and consequently of the presser foot a
about the pivot e¹ is produced by providing a cam slot in the frame c which
engages a stationary roller c' carried in the arm e8 from the machine frame e the
cam slot es being of the proper form to give the necessary movements to the foot a
for assisting in the lasting operation.
To lift the presser foot a from the upper a I provide a pawl g which is carried
on a pivot gl in the frame c and engages teeth g³ formed in the bar a² being held
inwards by a spring g³.
The pawl g has a stud 9 which at certain times makes contact with the fixed
releasing bar and disengages the pawl g from the teeth g².
The rest of the machine is of the ordinary well known construction and very
little of it appears in the drawings.
The operation of my improved lasting appliance is as follows:-
The operator places the last y and upper in position upon a jack and starts the
machine. The crosshead d descends and compresses the spring d³ preparatory to
the descent of the hammer b which is held up in the ordinary way by a catch and
trigger, not shewn in the drawings.
The descent of the crosshead d brings down the frame c and foot a which
latter as soon as it bears upon the upper is caused by the shape of the cam
slot to make a movement outwards from the machine and drag the upper
over the insole z of the boot, immediately after which a slightly further descent of
the beam & releases the trigger catch (not shewn) and allows the spring
drive down the hammer b with the tack w so as to secure the upper x to the insole z
and last y.
to
As soon as the frame c begins to rise again by the return movement of the
beam d, the pawl g lifts the foot a, through the bar a³, vertically off the upper
before the commencement of the return movement of the presser foot a which is
inwards and otherwise would tend to unlast the upper x.
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:
In a machine for lasting and tacking boots and shoes and in which a magnetized
hammer is used :-
1. The use of a presser foot to draw over and hold the edge of the upper down
upon the insole while the lasting tack is being driven substantially as described.
2. The combined mechanism as herein described and illustrated operating as
stated and for the purpose specified.
Dated this 0th day of Januar 1906
W. H. DORMAN.