IMPROVEMENTS IN MACHINERY OR APPARATUS TO BE EMPLOYED FOR THE WORKING OF SCREW PRESSES
Year: 1871

page_text: LETTERS PATENT to Arthur Maw, of Benthall Works, Broseley, in the
County of Salop, Manufacturer, for the Invention of "IMPROVEMENTS
IN MACHINERY OR APPARATUS TO BE EMPLOYED FOR THE WORKING OF SCREW
PRESSES."
PROVISIONAL SPECIFICATION left by the said Arthur Maw at the
Office of the Commissioners of Patents, with his Petition, on the
7th November 1871.
I, ARTHUR MAW, of Benthall Works, Broseley, in the County of Salop,
Manufacturer, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN MACHINERY OR APPARATUS TO BE EMPLOYED FOR THE WORKING
OF SCREW PRESSES," to be as follows, that is to say :-
My Invention has for its object the applying of steam or other motive

page_text: them self-acting, and thus dispense with the manual labour ordinarily
employed to operate such presses.
The nature of my Invention will be better understood by referring to
the accompanying Drawings.
Figure 1 is a plan, and Figure 2 a side elevation of the improved :
apparatus connected to the screw (a) of a press not shewn; (b) is a
toothed wheel for communicating the driving power from the driving
shaft (6); (c, c,) are triangular frames having a slightly.
lateral or
to-and-fro motion when required, and working from the centre or
shaft (b); (d) and (e) are a pair of toothed wheels revolving upon
shafts (d) and (e¹) in opposite directions, upon which are also mounted
the friction pullies (f) and (9), having by preference india-rubber
friction tires or V-shaped friction wheels, either of which may be self-
acting by the wheels (e) and (f) being formed as cams or eccentrics
and working in alternation; (h) is a driving pulley working the screw (a)
of the press and attached by double feathers to allow of its rise and fall;
(i) is a bar attached to the framework (c, c,) for giving the lateral
movement thereto by means of the crank (k) and treadle (2); (m) is the
fly wheel of the press.
In working the press the treadle (2) is so weighted as to move the
framework (c, c,) and with it the toothed wheels (d) and (e) with their
friction pullies (f) and (9), so that the pulley (f) will bear upon the
driving pulley (h) sufficiently to lift the screw to the requisite height
before delivering the blow, where if necessary it may be allowed to rest
against a block or buffer properly formed on the fly wheel (m) or by a
suitable break pressing on the fly wheel (m), and brought into action
by the head of the screw (a) acting on the end of a lever arranged for
such purpose. To deliver the blow the treadle (1) is depressed with
the foot, thus reversing the action of the weight above referred to so as
to bring the pulley (9) in contact with the driving pulley (h), and act
upon the pulley (h) the reverse way.
Instead of using the treadle (k), it may be found preferable to employ
a self-acting motion so as to maintain a regular or intermittent action of
the press without any manual power being exerted.
Figure 3 represents in side elevation an apparatus constructed for this
purpose, and consisting of a cam wheel (n) upon a driving shaft, making
one revolution whilst the screw is performing one operation of a single

page_text: or double blow and return movement as shewn at (n¹). A part of the
circumference of the wheel (n) is reduced in suitable proportions so as to
act upon a stud (o) secured to a lever (p) attached to the crank arm (k),
Figs. 1 and 2. The end (p') of the lever being weighted as required, it
follows that the revolving of the cam wheel (n) will cause the crank
arm () to rise and fall in alternation, producing the requisite lateral
movement to the framework (c, c,) Figs. 1 and 2, in the same way as
when acted upon by the foot by means of the treadle (1).
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Arthur Maw in the Great Seal Patent Office on
the 6th May 1872.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ARTHUR
MAW, of Benthall Works, Broseley, in the County of Salop, Manu-
facturer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Seventh day of November, in the
year of our Lord One thousand eight hundred and seventy-one, in the
thirty-fifth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Arthur Maw, Her special license
that I, the said Arthur Maw, my executors, administrators, and assigns,
or such others as I, the said Arthur Maw, my executors, administrators,
and assigns, should at any time agree with, and no others, from time
to time and at all times thereafter during the term therein expressed,
should and lawfully might make, use, exercise, and vend, within the
United Kingdom of Great Britain and Ireland, the Channel Islands, and
Isle of Man, an Invention for "IMPROVEMENTS IN MACHINERY OR APPARATUS
TO BE EMPLOYED FOR THE WORKING OF SCREW PRESSES," upon the condition
(amongst others) that I, the said Arthur Maw, my executors or adminis-
trators, by an instrument in writing under my, or their, or one of their
hands and seals, should particularly describe and ascertain the nature of
the said Invention, and in what manner the same was to be performed,
and cause the same to be filed in the Great Seal Patent Office within
six calendar months next and immediately after the date of the said
Letters Patent.

page_text: navure oг шу зша штенип, апа
performed, to be particularly described and ascertained in and by the
following statement, that is to say :—
My Invention has for its object the applying of steam or other motive
or mechanical power for the working of screw presses so as to render
them self-acting, and thus dispense with the manual labour ordinarily
employed to operate such presses.
The nature of my Invention will be better understood by referring to
the accompanying Drawings and the letters and figures marked thereon.
Figure 1 is a plan, and Figure 2 is a side elevation of the improved
apparatus connected to the screw (a) of a press not shewn; (b) is a
toothed wheel for communicating the driving power from the driving
shaft (¹); (c, c, c,) are triangular frames having a slightly lateral or
to-and-fro motion when required, and working from the centre or
shaft (¹); (d) and (c) are a pair of toothed wheels revolving upon
shafts (d) and (e¹) in opposite directions, upon which are also mounted
the friction pullies (f) and (g), having by preference india-rubber friction
tires, or instead of these friction pullies V-shaped friction wheels may be
employed, as in the arrangement herein-after described at Figures 3, 4,
and 5; (h) is a driving pulley working the screw (a) of the press, and
attached by double feathers to allow of its rise and fall, and held in its
place by a guide (not shewn) as in Figure 3; (i) is a bar attached to the
framework (c, c, c,) for giving the lateral movement thereto by means
of the crank (k) and treadle (1); (m) is the fly wheel of the press.
In working the press the treadle (1) is so weighted as to move the
framework (c, c,) and with it the toothed wheels (d) and (e) with their
friction pullies (f) and (9) so that the pulley (f) will bear upon the
driving pulley (h) sufficiently to lift the screw to the requisite height
before delivering the blow, where if necessary it may be allowed to rest
against a block or buffer properly formed on the fly wheel (m), or by a
suitable break pressing on the fly wheel (m), and brought into action
by the head of the screw (a) acting on the end of a lever arranged for
such purpose. To deliver the blow the treadle (1) is depressed with the
foot, thus reversing the action of the weight above referred to so as to

page_text: bring the pulley (9) in contact with the driving pulley (h), and act upon
the pulley (h) the reverse way.
Figures 3, 4, and 5 represent respectively in side elevation, plan as
seen from above, and end elevation, my improved apparatus arranged
with V-shaped friction wheels for applying the power, instead of having
the friction pullies on the same plane as the pulley (h) on the head of
the press, as already described in Figures 1 and 2.
"
(a) is a bevilled pulley attached by "double feathers" to the shaft (i)
which is connected with the screw pin; (6¹ and 6') are two bevilled friction
pullies having by preference india-rubber tires, and fastened to the
shaft (k) by means of bosses to tighten up with set screws and form a
'slipping crab"; (d and e) are fast and loose driving pullies attached
to the shaft (%); (f) is a boss having a circular groove in which a
fork (g) works, connected by rods and cranks to the treadle (l); (c, c,)
are two rollers upon which the pulley (a) works to keep it in a horizontal
position when it receives the pressure; (m) is a weight by which the
wheel (6') is kept in contact with the pulley (a) when the foot is
removed from the treadle (1); (5) is the fly wheel of the press provided
with a buffer which comes in contact with a block suitably arranged to
prevent its rising beyond a certain point in its upward movement, and
retaining it in that position when the press is thrown out of action.
The operation of the machine will be similar to that of the apparatus
described in Figures 1 and 2. The shaft (/) with the driving pulleys (d
and e) and friction pullies (b' and 6) have a slight lateral movement
through the bearings upon which the shaft (/) works. When the
treadle () is not acted upon by the foot, the weight (m) acting through
the connecting rod and cranks upon the shaft (%) by means of the
fork (9) draws the friction wheel (6¹) into contact with the pulley (a)
which raises the screw to its highest point. To throw the screw down-
wards and cause it to deliver a blow it is merely necessary to press on
the treadle (1), and by the reverse action to that just described the
friction wheel (62) will be brought into action with the pulley (a), at the
same time liberating the wheel (61). When the blow is delivered the
treadle (2) is relieved from pressure and the screw allowed to rise a
short distance by the action first described, when by a repetition of the
pressure of the foot on the treadle the second blow is delivered and the
crew allowed to rise to its highest elevation.

page_text: As already stated, I prefer to employ friction wheels having india-
rubber tires, but do not confine myself to them as I may use V-grooved
wheels, toothed wheels, or wood friction wheels if preferred.
Instead of using foot treadles as described, it may be found preferable
to employ an automatic or self-acting motion so as to maintain a regular 5
or intermittent action of the press without any manual power being
exerted

page_text: Having thus described the object and nature of my said Invention,
and the manner in which the same may be carried into effect, I claim,
without confining myself to these precise details, the several improve-
ments in machinery or apparatus to be employed for the working of
screw presses, substantially in manner as herein more fully set forth and
specified.
and the manner in which the same may be carried into effect, I claim,
without confining myself to these precise details, the several improve-
ments in machinery or apparatus to be employed for the working of
screw presses, substantially in manner as herein more fully set forth and
specified
In witness whereof, I, the said Arthur Maw, have hereunto set
my hand and seal, this Third day of May, in the year of our
Lord One thousand eight hundred and seventy-two.
specified
In witness whereof, I, the said Arthur Maw, have hereunto set
my hand and seal, this Third day of May, in the year of our
Lord One thousand eight hundred and seventy-two.