Improvements in Tack Driving Machines used in the Manufacture of Boots and Shoes.
Year: 1897

page_text: Date of Application, 22nd Feb.,
Camalate Spanifination Inft 12th Nov 1007
1897
Accontand
fot lon
1808
PROVISIONAL SPECIFICATION.
Improvements in Tack Driving Machines used in the Manufacture
of Boots and Shoes.
We, ALFRED POCHIN trading as the Standard Engineering Co., of 43 Welford
Road, Leicester, Makers of Boot and Shoe Machinery, FRANK HOWARD POCHIN,
Draughtsman, and HENRY ADDISON, Manager both of the same address, do hereby
declare the nature of this invention to be as follows:-
This invention relates to tack driving machines such as are employed in lasting
the uppers and insoles of boots and shoes and it has special reference to the jack
upon which the last and upper are carried and presented to the tack driver.
The invention has for its objects (1) improvements in the jack whereby it may
be adapted for use with various sizes of lasts and (2) improved means for varying
the angle or inclination of the last relatively to the tack driver, and also of
insuring the last and upper being automatically raised under the driver, that is,
kept at the proper height for receiving the tack without it being necessary for the
operator himself to raise or lower the jack for that purpose.
According to this invention, in order to adjust the jack for varying sizes of
lasts, one part of it, preferably the toe rest, is pivotted at its lower end and bifur-
cated to straddle a segmental plate fitted with a series of holes into which a pin,
passing also through the side of the toe rest is received, to lock the toe rest in
position.
The pin is encircled by a spring so that upon withdrawing it from one of the
holes in the segmental plate and moving the toe rest to or from the heel support
the distance between the two will be proportionately decreased or enlarged and a
last of correspondingly different size may be employed.
For varying the angle or inclination of the last to the tack driver the jack is
furnished with a cup or socket fitting over a ball on the upper end of the jack
supporting post.
The said ball may be furnished with a slot through which projects a pin movably
pivotted therein.
The said pin also passes through a circular plate or cap the concave face of which
may be fixed against the ball by a thumb or wing nut tightened over the said pin.
The said circular plate is fixed on the ball in such a position as to form a centre
around which the jack socket moves to automatically maintain the last close under
the driver as the jack is being revolved.
To vary the angle or inclination of the last the said circular plate may be
adjusted on the ball by means of the said wing or 'thumb nut.
The part of the jack supporting the heel of the last is pivotted to a projection
from the socket and is furnished with two feet bored to receive a screwed rod and
spring around it, the said rod also passing through a hole in a lug on the socket.
This construction enables the operator to tilt the jack support under the control

page_text: of the springs to remove the last while the springs constantly maintain the last
firm on the jack.
Dated this 20th day of February 1897
BOULT & WADE,
Agents for the Applicant.
Improvements in Tack Driving Machines used in the Manufacture
of Boots and Shoes.
We, ALFRED POCHIN trading as The Standard Engineering Co., of 43, Welford
Road, Leicester, Makers of Boot and Shoe Machinery, FRANK HOWARD POCHIN,
Draughtsman, and HENRY ADDISON, Manager both of the same address, 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 tack driving machines such as are employed in lasting
the uppers and insoles of boots and shoes and it has special reference to the jack
upon which the last and upper are carried and presented to the tack driver.
The invention has for its objects (1) improvements in the jack whereby it may
be adapted for use with various sizes of lasts and (2) improved means for varying
the angle or inclination of the last relatively to the tack driver, and also of
insuring the last and upper being automatically raised under the driver, that is,
kept at the proper height for receiving the tack without it being necessary for the
operator himself to raise or lower the jack for that purpose.
According to this invention, in order to adjust the jack for varying sizes of
lasts, one part of it, preferably the toe rest, is pivotted" at its lower end to, and
also if desired bifurcated to straddle, a segmental plate provided with a series
of holes into which a pin, passing also through the side of the toe rest is received
to lock the toe rest in position.
This locking pin as hereinafter described is encircled by a spring so that upon
withdrawing it from one of the holes in the segmental plate and moving the toe
rest to or from the heel support the distance between the two will be propor-
tionately decreased or enlarged and a last of correspondingly different size may be
employed.
For varying the angle or inclination of the last to the tack driver the jack is
furnished with a cup or socket fitting over a ball on the upper end of the jack
supporting post.
The said ball may be furnished with a slot through which projects a pin movably
pivotted therein.
The said pin also passes through a circular plate or cap the concave face of which
may be fixed against the ball by a nut tightened over the said pin.
The said circular plate is fixed on the ball in such a position as to form a centre
around which the jack socket moves to automatically maintain the last close under
the driver as the jack is being revolved.
To vary the angle or inclination of the last the said circular plate may be
adjusted on the ball by means of the said nut.
The part of the jack supporting the heel of the last is pivotted to an arm
projecting from the socket.
Referring to the accompanying drawing Figure 1 is a side elevation of a jack
constructed in accordance with this invention.

page_text: Figure 2 is a detail view in section of the ball and socket joint and the cap
and means for fixing it in position on the ball.
Figure 3 is a detail view showing a fragment of the toe rest and the perforated
segment and the spring controlled locking pin or cottar.
A represents the usual pillar or post connected with the treadle of a lasting
machine in the well known manner.
Over this is placed a sleeve B with a split band B' on the end through which
passes a bolt B³, a nut tightened on the end of the latter enables the sleeve to be
fixed in position on the pillar and also admits of being raised or lowered thereon
to similarly vary the position of the jack relatively to the tack driver.
At the upper end of the sleeve is a ball or sphere B3 furnished with a vertical
slot B within which a radial pin or bolt C is movably secured by a diametrical pin
or screw C₁
Over the spherical head is a concave socket D fitting truly thereon and sur-
mounting this is a disc-shaped cap E, the central part of whose underside passes
through the socket 1) and is concaved to fit snugly over the ball 13 while the
remaining part of the undersurface extends over the socket D, as shown most
clearly in Figure 2.
The bolt C extends upwardly through both the socket I) and the circular cap E,
and a nut C tightened over the end of the said bolt and against the cap E fixes
the latter rigidly on the ball but allows the socket D to rotate freely and easily
in one direction or the other concentrically with the bolt C and around the
said cap.
Extending upwards obliquely from one side of the socket is an arm F to which
is movably pivotted at F the pillar G having on its upper end a stud or projec-
tion G which enters the heel portion of the last.
Extending in a similar direction from the opposite side of the socket is also an
arm J to which is pivotted at J¹ the pillar K at whose summit is the toe rest K¹.
The toe rest consists of a shaped block covered with leather or other soft material
and furnished with a shank K2 which fits into the tubular end of the pillar K and
by means of a set screw K³ may be tightened therein or adjusted in regard to
height.
The arm J at its upper end is in the shape of a segment J2 which is straddled
by the bifurcated end or two legs of the toe rest pillar K.
At one side of the pillar K is a tubular projection K through which passes a
locking pin K5 having a knobhead and encircled by a spiral spring K6 which is
compressible between the end of the tubular projection K and a fixed collar K7
on the pin.
The said pin also passes through one of the series of holes J in the segment J2.
For the purpose of adjusting the toe rest relatively to the heel post for different
sizes of lasts the pin K must be withdrawn from any one of the holes J³ in
which it happens to be located and the toe rest moved to the right or left for a
smaller or larger last as the case may be.
When the operator withdraws the pin K the spring K6 becomes compressed
and when the pin is released the spring will of its own force press the pin into the
first hole it comes to and hold it therein so that it cannot fall out by shock or
accident.
A spring L attached at one end to a hook on the arm J and at the other end to
the pillar G pulls the latter normally towards the pillar K so that when the last
is mounted on the jack as shown in fig. 1 the said spring causes the front part
of the last to press firmly against the toe rest K. To remove the last from the
jack or to place one thereon, the operator first pulls the pillar G towards him
and against the force of the spring L thereby increasing the space between the said
two pillars and removing the pressure off the last.
It is obvious that as the socket 1) is arranged, as hereinbefore described to move
freely on the ball 133 around the cap E the whole of the jack comprising arms FJ
pillars G K toe rest K¹ and last H supported thereon, will also have a similar

page_text: movement thereby enabling the last and its upper to be presented and maintained at
one height relatively to the driver in a tack driving machine.
The angle of the jack or boot support may also be varied by releasing the nut Ca
and shifting the cap E and pin C to the right or to the left within the slot B' and
again tightening the nut thereon.
At whatever angle the cap E is fixed on the ball B³ it will form the centre
around which the socket and jack may be rotated and a uniform height of the last
relative to the tack driver will always be maintained.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is:-
1. The combination with a jack of a ball and socket joint constructed and ar-
ranged in such a manner as to permit the jack a free rotary movement thereon
for the purpose described.
2. The combination with a jack of a ball and socket joint arranged in such a
manner as to allow the jack a free rotary movement thereon and means to vary.
the angle of the jack for the purpose described.
3. The combination with a jack of a ball and socket joïnt, a cap adapted to be
adjustably tightened on the said ball and to form a centre around which the said
jack and its socket may be freely rotated substantially as and for the purpose
described.
4. A jack comprising a supporting post with a ball or spherical upper end, a
socket therefor carrying two last supporting pillars, a cap or equivalent attached
to the said ball and forming a centre around which the said socket and its pillar
may be rotated substantially as and for the purpose described.
5. In a jack the combination with one of its last supporting pillars of a per-
forated plate and a locking pin capable of locking the said pillar to the said
perforated plate for the purpose described.
6. In a jack the combination of two movable last supporting pillars, a spring
interposed between the said pillars, a perforated plate and locking pin for one of
the said pillars for the purpose described.
7. The improved construction of jack with ball and socket joint and means for
fixing the jack rotatably at different angles on the said ball constructed and
arranged substantially as described and illustrated in the accompanying drawing.
8. The improved jack capable of adjustment for various sizes of lasts constructed
and arranged substantially as described and illustrated in the accompanying
drawing.
Dated this 11th day of November 1897