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

page_text: Date of Application, 12th June, 1895
Complete Specification Left, 11th Mar., 1896-Accepted, 25th Apr., 1896
Improvements in Machines for Lasting and Tacking Boots
and Shoes.
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 object of this invention is the improvement of lasting or tacking machines
and consists in the first place in applying to the last guide against which the
operator holds the boot a locking arrangement which comes into operation before
the tack is driven.
The guide is pressed forward by a spring and is furnished with a rack and pinion
which revolve a ratchet wheel when the operator in manipulating the boot causes
the guide to move back.
A pawl operated by some convenient moving part of the machine locks the
ratchet wheel and consequently the guide prior to the driving of the tack thus
providing a firm support against which the operator holds the boot.
If the machine is provided with a presser foot for assisting the operator in the
lasting operation the locking pawl comes into operation before the presser foot acts
upon the upper so that the operator may have an unyielding support against which
to hold his boot while the presser foot operates.
Instead of using a rack and pinion the pawl may act upon teeth formed in a
slide carrying the guide or other equivalent means such as a friction lock may be
provided.
After each tack is driven the operation of the machine unlocks the guide
again.
"
The invention also comprises an improvement to the "jack
or part which
carries the boot. The "jack" is supported by a post carried in a universal joint
from the machine frame or in other convenient manner and the post is provided
with a socket which can be set at any desired angle.
The "jack" is provided with a stem which is free to slide up and down in the
socket and the socket carries a cam having an undulating upper surface formed to
suit the shape of the last.
The "jack" has a roller or arm which lies upon the surface of the cam and
supports the "jack."
When the "jack" is turned round by the operator during the lasting operation
the cam causes the "jack" to rise and fall so as to present the edges of the upper
at as nearly as possible a uniform height to the guide and other parts of the lasting
machine.
If desired the cam may be inverted and revolve with the "jack" and the roller
be carried upon the post.
Tated this 11th dor of June 1895

page_text: Improvements in Machines for Lasting and Tacking Boots
and Shoes.
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 object of this invention is the improvement of lasting or tacking machines
which make use of a magnetized hammer for driving the tacks and consists, in the
first place, in applying to the last guide, against which the operator holds the
boot, a locking arrangement which comes into operation before the tack is
driven.
The guide is pressed forward by a spring and is furnished with a rack and pinion
which revolve a ratchet wheel when the operator in manipulating the boot causes
the guide to move back.
A pawl, operated by some convenient moving part of the machine, locks the
ratchet wheel, and consequently the guide, prior to the driving of the tack, thus
providing a firm support against which the operator holds the boot.
If the machine is provided with a presser foot for assisting the operator in the
lasting operation the locking pawl comes into operation before the presser foot acts
upon the upper so that the operator may have an unyielding support against which
to hold his boot while the presser foot operates.
Instead of using a rack and pinion the pawl may act upon teeth formed in a
slide carrying the guide, or other equivalent means, such as a friction lock, may be
provided.
After each tack is driven the operation of the machine unlocks the guide
again.
The invention also comprises an improvement to the "jack" or part which
carries the boot. The "jack" is supported by a post carried in a universal joint
from the machine frame, or in other convenient manner, and the post is provided
with a socket which can be set at any desired angle. The "jack" is provided
with a stem which is free to slide up and down in the socket and the socket carries
a cam having an undulating upper surface formed to suit the shape of the last.
The "jack
has a roller or arm which lies upon the surface of the cam and
supports the "jack." When the "jack" is turned round by the operator during
the lasting operation the cam causes the "jack" to rise and fall so as to present
the edges of the upper at as nearly as possible a uniform height to the guide and
other parts of the lasting machine. If desired the cam may be inverted and
revolve with the "jack" and the roller be carried upon the post.
My invention is illustrated by the accompanying drawings in which
Fig. 1. is a side view shewing my improvements.
Fig. 2. is an alternative construction of the "jack."
Figs. 3 and 4 shew modifications of the locking arrangement.
Figs. 5 and 6 shew a portion of the machine enlarged.
I mount the last guide a upon a sliding bar 6 carried in the frame c of the
machine. The bar b is provided with teeth d which gear with a pinion e mounted
upon a stud in the frame c and attached to a ratchet wheel g so that the two
revolve as one upon the stud f. A clock spring his fastened at one end to the
stud and at its other end to the ratchet wheel 9 so as to bear forward the last
guide a against the boot i and a pawl j engages the teeth k of the ratchet wheel g
being mounted on a stud in the frame c. A striker m carried upon some
convenient moving part of the machine, as the lever n, holds the pawlj out of
engagement with the ratchet wheel 9 while the magnetized hammer o is raised to

page_text: receive its tack and releases the pawlj so that it locks the ratchet wheel 9 prior-
to the descent of the hammer o with the tack. The object of the arrangement
being that while the hammer o is raised the operator can manipulate the boot i
against the elastically sliding guide a but that just prior to the descent of the
hammer o the machine locks the guide a fast so as to form an unyielding support
to the boot i while the tack is driven.
In the modification shewn in Fig. 3. the bar b' has teeth formed in its upper-
edge which are engaged by a pawl mounted on a stud and released by a
striker m¹. A spring bears forward the bar and another spring h² holds the
pawl in engagement with the teeth when not held out by the striker m².
The modification shewn in Fig. 4. is very similar but the bar is locked by a
presser lever mounted on a stud 12 in the frame c and kept in engagement by a
spring ³, the bar 62 being borne forward by the spring . A striker m² serves to
release the lever k².
The jack p is supported by a post pl, carried from the frame c in a universal
joint p2, and is provided with a socket p³ which can be set at any desired angle and
cramped with a screw p¹.
"
The "jack stem is free to rise and fall in the socket p³ which carries a
circular cam g' having an undulating upper edge g², formed to suit the shape of the
last, on which run rollers q³ q carried from the "jack" p. When the jack p is
turned round by the operator during the lasting operation the cam edge q causes
the "jack "p to rise and fall so as to present the undulating edge of the boot
upper at as nearly as possible a uniform height to the guide a and the other parts
of the lasting machine.
In the alternative construction shewn in Fig. 2. the cam ³ is inverted and
revolves with the jack p the rollers q³ q being carried on the piece p which is.
secured in the socket p³.
When it is desired to give a different amount of rise and fall at the toe of the
boot to that given at the heel or a difference at the two sides of the waist the cam.
edge q is not symmetrical and one roller only q³ or q', can be employed.
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
clain is.
1. In a machine for lasting and tacking boots and shoes and in which a
magnetized hammer is used the automatically locking last guide substantially as
described.
2. In a machine for lasting and tacking boots and shoes and in which a
magnetized hammer is used the jack with the rising and falling cam movement.
substantially as described.
Dated this 10th day of March 1896.