Improvements in Hydraulic Pressure Intensifiers.
Year: 1897

page_text: Date of Application, 14th Apr., 1897-Accepted, 3rd July, 1897.
COMPLETE SPECIFICATION.
Improvements in Hydraulic Pressure Intensifiers.
We, JOSEPH BUTTERWORTH, of 131 Station Road Pendlebury, in the County of
Lancaster Engineer, and OSWALD ROBINSON and JAMES WHITELEGG, both of 199
Princess Street, Manchester in the County of Lancaster, Merchants, do hereby,
declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:
Our invention consists of an improved method of operating an apparatus for
Intensifying Hydraulic pressure, and known as an Intensifier, Hitherto, the
means of operating has been by Automatic Valves, operated by the rise or fall
of pressure caused by the presses taking water from the pipes, to which the In-
tensifier is connected, or by ordinary stop, or other mechanically worked valves,
operated by hand.
In the first case, the Automatic Valves are liable to stick, and are found to
waste a large amount of water and time, and in the second case, a person must be
always stationed at the Intensifier, especially where the presses are situated at a
distance from the Intensifier. Our invention seeks to combine the certainty of
action of the mechanically operated valve, with the ability to operate the In-
tensifier from a number of distant points. In order to do this, we construct a
three-way valve of either the slide type, or, the ordinary mushroom valve type,
preferably the latter, which consists of a valve body, having two seatings arranged
in line, one at each end of same, accessible by means of covers or plugs for the
purpose of fitting and grinding the valves in position.
The space between the two seatings is in communication with the Intensifier,
one seating has a valve fitted, which controls the admission of water from the
Hydraulic main, to the Intensifier, the pressure in the main being always in the
top of the valve, and tending to keep it tight. A valve of similar size is fitted
to the other end of the valve body, to control the release of the water in the In-
tensifier to the waste, or otherwise. The forks of the valve are made so long as
to touch the forks of the valve before mentioned and when either valve is forced
to its seat, it lifts the other about a quarter of an inch, or, whatever distance may
be required, for efficiently charging and discharging the Intensifier.
On the head of the valve, which controlls the waste water, a plug or ram is
formed, about equal to the combined areas of the two seatings.
A chamber is formed round the end of the ram, and isolated from the waste
pipe by means of a hydraulic leather.
If water from the Hydraulic main be admitted to the end of the ram, it will,
by its greater area force the waste water valve to its seat, and, the latter by means
of its forks will force open the admission valve, thus, allowing water from the
hydraulic main to rush into the Intensifier, and work same. If, on the other
hand, the pressure be released from the chamber just mentioned, the reverse
action occurs, the pressure on the top of admission valve forcing it down, and
opening the waste valve, thus, allowing the water that has just operated the In-
tensifier to run to waste, or, otherwise. The valves are thus controlled by admit-
ting the hydraulic pressure to the chamber, surrounding the end of the ram, or
releasing it from same.

page_text: This may be done from a number of distant points, by means of small three-
way Stop Valves, or suitable construction, connected by suitably arranged small
bore pipes to the chamber so as to control the admission or release as described.
By this means persons at a distance from the Intensifier may be able to control
the working of the Intensifier with certainty and promptitude, and by the use of
pressure gauges can tell if same is being used at any other point.
In cases where it is not convenient to operate the valve wholly by hydraulic
power, same may be assisted by a spring or by a weight acting directly, or, by
means of a lever and weight acting on the end of the ram. When this method is
0employed, it will be possible to regulate the closing power, by increasing or
decreasing the weight, lever, or spring.
In order that our invention may be more clearly understood, reference is made
to the accompanying drawing. Figure 1 is a section, and Figure 2 an end view
of the three-way valve operating the Intensifier. The Valve Body B has two
5 eatings A and C, on which sit two valves D and E. The valve D, is shut, and
by means of its forks F, holds E open, thus allowing the water which has acted
on the large Ram of the Intensifier to run to waste through the pipes I and W.
The space above D is filled with low pressure water, say at half a ton per square
inch which keeps it tight on its seat, but if water at the same pressure be admitted
Othrough the small bore pipe H to the end of the ram G, formed on the valve E, it
will, by virtue of the excess of area of G over D force the latter open, and at the
same time close E, thus allowing water to pass from the pipe J to the Intensifier,
and raise the large Ram of the latter. In order to lower the Ram of the In-
tensifier by running the water under same to waste, the pressure is released from
5the end of Ram G by the pipe H, when the pressure above D at once closes same,
and opens E, leading to W the waste pipe. The pipe H may be any length, and
may be charged with, and emptied of water by small valves placed at any given
number of points in same, so that it is possible to work the Intensifier from any
number of different places. The plug K and cover L are arranged so that the
Ovalves D and E are readily accessible for repairs. M is a leather packing Ring
which prevents leakage along the Ram G into the waste pipe W.
In cases where it is not convenient to operate the valve wholly by hydraulic
power, G may be made equal in area to D), and the power required to close E and
open D, may be furnished by a spring, or, lever and weight, operating on the end
5of G, thus, furnishing an easy means of regulating the said power.
Having now particularly described, and ascertained the nature of our inven-
tion, we claim,―
First: A Threeway mushroom or slide valve substantially as shown in
Figures 1 and 2, controlling the admission of pressure to, and release of pressure
Ofrom the large ram of the intensifier.
Second Operating the above valve from a distance by means of small three-
way valves and pipes, which admit pressure to or release pressure from the end
of ram G Figure 1.
Third: The combination of the large valve shown Figures 1 and 2 with the
5 maller valves and pipes for the purpose herein before described.
Dated this 7th day of April 1897.
JOSEPH BUTTERWORTH.
OSWALD ROBINSON.
JAMES WHITELEGG.