Improvements in Valves for Controlling the Supply of Water to the Large Cylinder of Hydraulic Intensifiers.
Year: 1895

page_text: Date of Application, 29th June, 1895
Complete Specification Left, 27th Mar., 1896-Accepted, 2nd May, 189;
PROVISIONAL SPECIFICATION.
Improvements in Valves for Controlling the Supply of Water to the
Large Cylinder of Hydraulic Intensifiers.
I, JOHN CHARLES ETCHELLS, of Heaton Chapel, near Stockport, in the
County of Lancaster, Engineer, do hereby declare the nature of this invention to
be as follows:-
This invention is designed to provide a valve for admitting water under pressure
and cutting off the supply of water to the large cylinder of hydraulic intensifiers or
capable of being controlled or actuated by hand.
In carrying out the invention I construct a central or main valve casing with
two cylinders or chambers cach fitted with a ram or plunger and into each of which
a small port or waterway enters. One cylinder is of greater diameter than the
other and is fitted with a larger ram. The small inlet port to the smaller cylinder
is constantly open to the main water supply and the inlet port or supply pipe to
the larger cylinder while being connected to the water main is provided with a
three way or other valve by which it can be opened or closed or connected with an
exhaust instead of the supply main. This valve is of such a size as to be easily
moved by hand to either open or close it.
The two cylinders are preferably placed together with a division plate or
diaphragm between their ends and the rams are connected together by a cross head,
sliding link or other means so that as one moves out of its cylinder the other will
move in.
These two rams are connected by the sliding cross-head or link and suitable
connecting rods with two other valves one the inain inlet or supply valve for the
large cylinder of the intensifier and the other the exhaust valve thereof.
The inlet valve is constructed to be held to its seat by the pressure of the water
a spring being applied at one side of it and at the other side the end of a plunger
connected with the sliding crosshend or link enters whereby it can be moved from
its seat.
The exhaust valve is of similar construction to the inlet valve and the two are
so arranged that one only can be open at a time.
In one modification the two rams may be connected together by a connecting
rod passing through the end of the cylinders and the sliding link dispensed with
and in another modification the two cylinders may be placed side by side and the
rams be connected together by a rocking lever so that as one moves out the other
moves in.
When the small hand valve is closed to the supply main and open to the
exhaust the pressure on the small ram holds the exhaust valve of the intensifier
cpen. When the small band valve is opened aud pressure admitted behind the
larger ram the reverse movement takes place and the inlet valve is opened the
exhaust being allowed to close by the action of its spring and the pressure of water
behind it.
Dated this 28th day of Ju..
WM. P. THOMPSON & Co.,
6, Bank Street, Manchester, Patent Agents.

page_text: Improvements in Valves for Controlling the Supply of Water to the
Large Cylinder of Hydraulic Intensifiers.
I, JOHN CHARLES ETCHELLS, of Heaton Chapel, near Stockport, in the
County of Lancaster, 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 :-
This invention is designed to provide a valve for admitting water under pressure
and cutting off the supply of water to the large cylinder of hydraulic intensifiers
capable of being controlled or actuated by hand.
The invention consists essentially in applying to the supply and exhaust valves
of the intensifier a controlling valve or valve mechanism comprising two parallel
rams of different areas working in corresponding cylinders the smaller of which is
constantly open to the supply main and the larger capable of being open either to
the supply main or to the exhaust the two rams being connected to work together
by which means the supply and exhaust valves are opened or closed by admitting
water to the larger cylinder or opening it to the exhaust.
It will be fully described with reference to accompanying drawings.
Fig. 1. Sectional elevation.
Fig. 2. Sectional plan.
The supply main A connects with the intensifier main B through the supply valve
chamber C and the intensifier main B also connects with the exhaust through the
exhaust valve chamber D. The supply valve E and the exhaust valve Fare of
similar construction and are held upon their respective seats when closed by the
pressure of water behind them.
Between the supply valve and the exhaust valves I construct a central or main
valve casing with two cylinders or chambers G H each fitted with a ram or
plunger K L and into each of which a small port or waterway, yh enters. The
cylinder G is of greater diameter than the cylinder H and is fitted with a larger
ram K. The small inlet port h of the smaller cylinder H is constantly open to the
main water supply in the main A and the inlet port or supply pipe g of the larger
cylinder G while being connected to the water supply main A is provided with a
three way or other valve M by which it can be opened or closed or connected with
an exhaust m instead of the supply main A. The valve M is of such a size and
construction as to be easily moved by hand to either open or close it.
The two cylinders G and H are preferably placed together with a division plate
or diaphragm N between their ends and the rams K and L are connected together
by a cross head or sliding link O or by other means so that as one moves out of its
cylinder the other will move in.
The two rams K and L are also connected with the supply valve E and the
exhaust valve F through the sliding cross head or link O. At each end of the cross
head or link O is fitted a rod or spindle o o¹ one of which projects into the
chamber of the supply valve E and at the other into the chamber D of the
exhaust valve F. When the rams K and L and cross head O are moved in one
direction the spindle o presses the supply valve E from its seat and when these
move in the reverse direction they allow the supply valve E to close by the
pressure upon it and the spindle of presses the exhaust valve F from its seat and
opens it.
The supply or inlet valve E is constructed to be held to its seat by the
pressure of the water a spring e being applied at one side of it and at the other
side the end of the spindle o connected with the sliding cross head or link enters
whereby it can be moved from its seat.

page_text: The exhaust valve F is of similar construction to the valve E and the two are so
arranged that one only can be removed from its seat or open at the same time.
In one modification the two rams K and L may be connected together by a
connecting rod passing through the end of the cylinders and the sliding link
dispensed with a spindle or rod direct from the rams entering the supply valve and
exhaust valve chambers respectively and in another modification the two
cylinders G and H may be placed side by side and the rams be connected together
by a rocking lever so that as one moves out the other moves in.
When the small hand valve M is closed to the supply main A and open to the
exhaust m the pressure of the main on the small ram L holds the exhaust valve F
of the intensifier open.
When the small hand valve M is opened and pressure
admitted behind the larger ram K the reverse movement takes place and the
supply valve E is opened the exhaust being allowed to close by the action of its
spring fand the pressure of water behind it.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I now declare that what I
claim is.-
1. The combination with the supply and exhaust valves for hydraulic intensifiers,
of controlling valves or valve mechanism comprising two rams of different areas in
corresponding cylinders the smaller one being constantly open to the supply main
and the larger oue capable of being opened either to the supply main or to an
exhaust connected to each other and to the supply and exhaust valve so that when
the larger one is opened to the supply main they work together to open the supply
valve and when closed they move in a reverse direction to open the exhaust valve
substantially as and for the purpose described.
2. An apparatus for controlling or actuating the supply and exhaust valves of
hydraulic intensifiers the combination with two rams of different areas working in
corresponding cylinders the smaller one constantly open to the supply main and
the larger one capable of being opened to the supply main or to an exhaust of the
three way valve M placed in the inlet to the larger cylinder the cross head or
link O by which the two rams are connected and the spindles o o' penetrating the
supply and exhaust valve chambers C and D respectively by which the supply and
exhaust valves are opened substantially as described and shown.
0
3. Valves for controlling the supply of water to the large cylinders of hydraulic
intensifiers constructed and arranged in combination substantially as described and
shown.
Dated this 19th day of March 1896