IMPROVEMENTS IN FLY OR SCREW PRESSES
Year: 1858

page_text: LETTERS PATENT to William Beauchamp Bagnal Harvey, of Bagnal
Villa, Gresham Road, Brixton, in the County of Surrey, for the Invention
of "IMPROVEMENTS IN FLY OR SCREW PRESSES."
PROVISIONAL SPECIFICATION left by the said William Beauchamp
Bagnal Harvey at the Office of the Commissioners of Patents, with his
Petition, on the 2nd August 1858.
I, WILLIAM BEAUCHAMP BAGNAL HARVEY, of Bagnal Villa, Gresham Road,
Brixton, in the County of Surrey, do hereby declare the nature of the Inven-
tion for "IMPROVEMENTS IN FLY OR SCREW PRESSES," to be as follows:-
This Invention has for its object improvements in fly or screw presses.
For these purposes the screws of such presses are connected with the pistons
of engines which make partial rotations within the engines. The engines are
worked by steam, air, or other fluid. The form of the partial rotatory engines
used may be varied, but it is preferred to use an engine of the following
construction:-The two pistons of an engine, actuating a press, work in a
hollow ring chamber, and they give motion to an arm or crank which
embraces the screw shaft, but allows it to slide but not turn within it; the
arm passes through and moves in a slot or opening on the inner surface of the
hollow ring; the screw passes through and works in a fixed female screw, and

page_text: at its upper end the screw has fixed thereon a fly wheel, and the screw
and fly wheel are upheld by a spring or springs, so as to keep such parts
from descending except when actuated by the engine. Provision is made for
admitting steam, air, or other fluid to flow into and from the hollow ring in
which the piston or pistons move, and suitable valves and passages are used
to regulate the inlet and outlet of the fluid employed.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed.
by the said William Beauchamp Bagnal Harvey in the Great Seal
Patent Office on the 2nd February 1859.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
BEAUCHAMP BAGNAL HARVEY, of Bagnal Villa, Gresham Road, Brixton, in the
County of Surrey, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Second day of August, in the year of our Lord One
thousand eight hundred and fifty-eight, in the twenty-second year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said William Beauchamp Bagnal Harvey, Her special licence that I, the
said William Beauchamp Bagnal Harvey, my executors, administrators,
and assigns, or such others as I, the said William Beauchamp Bagnal
Harvey, my executors, administrators, and assigns, should at any time
agree with, and no others, from time to time and at all times there-
after 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 FLY OR SCREW PRESSES," upon the condition (amongst others) that I, the
said William Beauchamp Bagnal Harvey, my executors or administrators, 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.
NOW KNOW YE, that I, the said William Beauchamp Bagnal Harvey,
do hereby declare the nature of the said Invention, and in what manner the
same is to be performed, to be particularly described and ascertained in and
by the following statement thereof, that is to say:-

page_text: This Invention has for its object improvements in fly or screw presses.
For these purposes the screws of such presses are connected with the pistons
of engines which make partial rotations within the engines. The engines are
worked by steam, air, or other fluid. The form of the partial rotatory engines
used may be varied, but it is preferred to use an engine of the following
construction The two pistons of an engine actuating a press work in a
hollow ring chamber, and they give motion to an arm or crank which
embraces the screw shaft, but allows it to slide but not turn within it. The
arm passes through and moves in a slot or opening on the inner surface of
the hollow ring; the screw passes through and works in a fixed female screw,
and at its upper end the screw has fixed thereon a fly wheel, and the screw
and fly wheel are upheld by a spring or springs, so as to keep such parts from
descending except when actuated by the engine. Provision is made for
admitting steam, air, or other fluid to flow into and from the hollow ring in
which the piston or pistons move, and suitable valves and passages are used
to regulate the inlet and outlet of the fluid employed.
Having thus stated the nature of my said Invention, I will proceed more
fully to describe the manner of performing the same.
The object of my improvements is to apply the power of a piston or pistons
of an engine worked by steam or other fluid directly to a screw press, and in
such manner that a screw press and an engine may be combined in the same
framing. The arrangement of the mechanical parts when carrying out my
Invention may be greatly varied, but the manner in which I prefer to perform
my improvements will readily be understood by reference to the Drawing
hereunto annexed, aided by the following description thereof:-
DESCRIPTION OF THE DRAWING.
Figure 1 shows an elevation of a fly press and an engine combined there-
with, and carried by the same framing, according to my Invention; Figure 2
shows a vertical section of the engine and of the upper parts of the screw
press Figure 3 shows a horizontal view of the interior of the engine;
Figure 4 are wedges for adjusting the height of the lower die to suit the
different strokes of the press; Figure 5, an enlarged section of valve and box
on a larger scale than that of the other Figures. In each of the views shown
by the Drawing the same letters are used to indicate the same parts.
A, A, is the annular cylinder within which the piston or pistons work, the
two parts of which cylinder are connected by screw nuts and the inner and
outer flanches B, B, and C, C; D is the slide valve; E is the adjustable

page_text: lap of slide valve; F, the inlet passage to slide valve; G, the outlet passage
to the slide valve; H is the spindle regulating the lap of the slide valve; I is
the stop valve for starting and stopping the press; J is the piston. In the
arrangement shown only one piston is used, the other portion of the annular
cylinder being arranged with buffing apparatus, as shewn, but a piston and
rod might be connected to the other side of the crank arm, or provision made
for introducing steam into such part of the cylinder as well as to the other
part. The piston J is faced with a cup of leather or of other suitable'
material. K is a detaining plate, which carries a cam and switch; L is a cam
to give motion to the slide valve; M is a switch; N is a radius rod or bar;
O is the valve spindle; P is a pin in the radius rod or bar N, which during the
effective stroke of the press rests on the cam L, being kept up to it by the
pressure of the steam on the valve, but during the return stroke it rests
on the switch M (the end of which is kept up to the cam by a spring), and
the exhaust is maintained open. The piston rod is fixed to an arm Q, which
gives motion to the screw R, which I prefer to be of five-inch pitch, but this
may be varied. S is the reverse valve, which closes the inlet passage at the
end of the return stroke, to form an air cushion to arrest the motion of
the piston; T is a cast-iron block or buffer, the position of which regulates
the length of stroke. The buffer block is set or moved by the pinion U,
which takes into a toothed rack on the block T, and the space V is filled with
oil, air, water, or other material. At the end of the block T a cup W, of
leather or of other suitable material, is affixed; at the back of the piston there
is a packing Y of suitable elastic material. Z, Z, are blocks of wood or of
vulcanized india-rubber, or other suitable material, applied to the buffing
block T and to the arm Q. The arm Q embraces the upper part of the
screw R, as shown, and causes such screw to turn therewith by reason of the
key or feather b.
On the upper end of the screw the fly wheel f is affixed.
9, 9, are springs on the rods or uprights h, h, such springs supporting the
fly wheel and screw, and causing them to return after each stroke of the press.
I prefer to use steel springs for this purpose, but others may be used. p is a
cam for working the laying-on gear; it acts on a slide q within the tube or
-guide-cast-on-cylinder-;-the-slide-q-communicates_its_motions to a lever, by
which the laying-on is effected in the usual manner.
I have not thought
it necessary to describe the ordinary parts of the fly press, they being well
understood, and for the most part clearly shown in the Drawing.
The engine
may be worked by steam, compressed air, water, or otherwise, but I prefer to
employ steam or compressed air.

page_text: Having thus described the nature of my Invention, and the manner of
erforming the same, I would have it understood that I make no claim to any
of the mechanical parts separately, nor do I confine myself thereto; but what
I claim is the combination herein described.
In witness whereof, I, the said William Beauchamp Bagnal Harvey,
have hereunto set my hand and seal, this Fourteenth day of January,
in the year of our Lord One thousand eight hundred and fifty-nine.
Witness,
S. CARPMAEL.
W. B. B. HARVEY. (L.s.)