Year: 1888

page_text: Date of Application, 5th Jan., 1888-
Complete Left, 3rd Apr., 1888
Complete Accepted. 11th May, 1888
1, HENRY BERRY, of Croydon Works, Hunslet, Leeds, in the County of York,
Engineer, do hereby declare the nature of this invention to be as follows:-
To provide means applicable to Hydraulic Forging, Shearing, Punching, Pressing,
Rivetting, and similar Machines, whereby a double, treble, or any wished for Pressure
can be exerted in the main working Cylinder, at the will of the Operator, and is
carried out in the following manner.
In a conveniant position, I attach to the main Cylinder, a supplementary Cylinder,
furnished with a Piston, the Ram of which Piston is carried through a Stuffing Box
into the working Cylinder. The Piston of this supplementary or intensifying
Cylinder being of larger area than its Ram, and being fed from the same Accumulator
as the working Cylinder, will cause the intensifying Ram on being operated, to
produce a pressure in the working Cylinder, equal to the difference in area of the
intensifying Piston and its Ram:.
The Apparatus as applied to Shearing purposes, would be worked in the following
manner. The working Cylinder at Accumulator pressure would be equal to Bars of
small section, for heavier work, the intensifying Ram would come into play, and
raise the pressure in the main Cylinder to the desired point.. A separate valve
arrangement being provided for the intensifying Cylinder, it will be evident that any
number of intensifying strokes can be given, and the main Piston jacked on its
course till the Shear is accomplished.
Or a second, or any conveniant number of intensifying Cylinders may be
employed, and the pressure in the main Cylinder, by their means, raised to any
desired extent.
It will be seen that by this arrangement an economy of Power will be effected, as
only the actual needed power to effect the Shearing, Pressing or other operation need
The brought into plav

page_text: The valve arrangement of the working Cylinder, may be of any conveniant
description, being provided with separate inlet and outlet passages, the inlet being
guarded by a non return or check valve, in order that the intensifying pressure may
be prevented from finding its way back to the Accumulator. The intensifying
Cylinders are also fitted with separate valves, controlling the usual inlet and outlet
passages, and being worked by hand, can as previously described, give any number
of intensifying strokes, each stroke propelling more water into the working Cylinder,
and advancing it on its stroke.

page_text: Improvements in Applying Varying Degrees of Pressure to
Hydraulic Cylinders.
1, HENRY BERRY, of Croydon Works, Hunslet, Leeds, in the County of York,
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 to provide means applicable to Hydraulic Forging,
Shearing, Punching, Pressing and Rivetting Machines, whereby a double, treble, or
any wished for pressure can be exerted in the main Cylinder at the will of the
Operator, and is carried out in the following manner.
In a conveniant position, I attach to the main working Cylinder, a supplementary
Cylinder, furnished with a Piston, the Ram of which Piston is carried through a
stuffing box into the main working Cylinder. The Piston of this supplementary or
intensifying Cylinder being of larger area than its Ram, and being fed from the same
accumulator as the working Cylinder, will cause the Ram on being operated, to
produce a pressure in the working Cylinder equal to the difference in areas of the
intensifying Piston and its Ram.
The apparatus as applied, say to Shearing purposes would be worked in the
following manner. The working Cylinder at Accumulator pressure would be equal
to Bars of small section. For heavier work the intensifying Ram would come into
play, and raise the pressure in main Cylinder to the desired point. A separate valve
arrangement being provided for the intensifying Cylinder, it will be evident that any
number of intensifying strokes can be given, and the main Piston jacked" on its
course till the Shear is accomplished.
"
Or a second or any conveniant number of intensifying Cylinders may be used, and
the pressure in the main Cylinder by their means, raised to any desired limit.
It will be seen that by this arrangement an econemy of power will be effected, as
only the power actually needed to effect the Shearing, Pressing or other operation
required need be brought into play. The valve arrangement of the working Cylinder
may be of any conveniant description, being provided with separate inlet and outlet
passages, the inlet being guarded by a non return or check valve, in order that the
intensifying pressure may be prevented from finding its way back to the
Accumulator.
The intensifying Cylinders are also fitted with separate valves, controlling the usual
inlet and outlet passages, and being worked by hand, can as previously described;
give any number of strokes to the intensifying Ram, each stroke propelling more
water into the working Cylinder, and advancing the Piston on its Stroke.
In order to enable my invention to be readily understood and carried into effect,
I will proceed to describe the same by reference to the accompanying drawing which
illustrates the application of the intensifying Cylinder, and its Piston and Ram to any

page_text: ordinary Hydraulic Cylinder. a. is the main Cylinder. b. the working Piston. c. the
intensifying Cylinder. d. the Piston and e the intensifying Ram. f. the port to the
intensifying Cylinder, and g. the passage communicating with the valve arrangement
of the working Cylinder. Pressure being by passage g. admitted into main Cylinder a.
will cause the Piston b. to make its outdoor stroke, should the operation desired,
require more power than the Piston b, is capable of applying, rescource is now had to
the intensifying Cylinder c. the difference in areas of the Piston and Ram of which
will cause the pressure in the main Cylinder to rise to the desired point. Should one
stroke of the intensifying Piston not be sufficient, a second or any number of strokes
can be given, by releasing pressure from intensifying Cylinder when the Piston d.
will ascend by reason of the incoming pressure through passage g, displacing and
raising the Ram e, to its highest position, ready for its next descent.
Having now particularly described and ascertained the nature of my said
Invention, and in what manner the same is to be performed, I declare that what
I claim, is
The attachment of an intensifying Cylinder, Piston and Ram, to the working
Cylinders of Hydraulic Machines, substantially as, and for the purposes herein set
forth and indicated.