Year: 1888

page_text: I, Roger Wright, of Elswick Works, Newcastle upon Tyne, Engineer, do hereby
declare the nature of this invention to be as follows:-
This invention has for its object improvements in hydraulic engines and relates
especially to an arrangement for the valves of such engines which admits of the
ready reversal of the engine. The cylinders of the engine are carried by trunnions
and they oscillate. The trunnions are hollow and the water passes to and from the
cylinder through the trunnion.
A prolongation of the trunnion forms the valve, it has two ports in it diametrically
opposite. This valve is contained within a cylindrical case in which it can turn
freely and cupped leather rings surrounding the cylindrical valve or prolongation
of the trunnion prevent leakage. Between these packing rings two passages enter
the valve caso one on either side; one of these passages is the water inlet and the
other is the ontlet.
The passages lead to a three way cock where they meet the water supply pipe and
by turning the cock either of the passages may be made to serve as the inlet to the
cylinder; the other passage becoming the outlet.
There is a space around the valve and between it and the interior of the case, this
space is occupied by a lining made in two parts. Each part of the lining covers one
of the passages entering the valve case and closes it except that there is a port in
each part of the lining by which the water is able to pass.
The two parts forming the lining are prevented from turning within the valve case
and the ports in the lining are in constant connection with the water passages of the
casing.
The ports in the lining are so situate as not simultaneously to coincide with the
ports in the valve but the inlet port in the valve travels over the corresponding port in

page_text: the lining whilst the cylinder is receiving water and similarly the outlet port in the
valve travels over the corresponding port in the lining whilst water is being expelled
from the cylinder. In whichever direction the engine may be running and in which-
ever direction the water may be flowing through the passages of the valve case the
divided lining serves to prevent leakage and waste of water, the part of the lining on
the inlet side is held by the water pressure up to the face of the valve; the part of
the lining on the outlet side is held up to the outlet passage in the valve casing
and the valve itself is pressed up to this latter part of the lining.
D
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2017

page_text: I, ROGER WRIGHT of Elswick Works Newcastle-upon-Tyne 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 has for its object improvements in hydraulic engines and relates
especially to an arrangement for the valves of such engines which admits of the
ready reversal of the engine. The cylinders of the engine are carried by trunnions
and they oscillate. The trunnions are hollow and the water passes to and from the
cylinder through the trunnion.
A prolongation of the trunnion forms the valve, it has two ports in it diametrically
opposite. This valve is contained within a cylindrical case in which it can turn
freely and cupped leather rings surrounding the cylindrical valve or prolongation of
the trunnion prevent leakage. Between these packing rings two passages enter the
valve case one on either side, one of these passages is the water inlet and the
other is the outlet.
The passages lead to a three way cock where they meet the water supply pipe and
by turning the cock either of the passages may be made to serve as the inlet to the
cylinder, the other passage becoming the outlet.
There is a space around the valve and between it and the interior of the case, this
space is occupied by a lining made in two parts. Each part of the lining covers one
of the passages entering the valve case and closes it except that there is a port in
each part of the lining by which the water is able to pass.
The two parts forming the lining are prevented from turning within the valve case
and the ports in the lining are in constant connection with the water passages of the
casing.
The ports in the lining are so situate as not simultaneously to coincide with the
ports in the valve but the inlet port in the valve travels over the corresponding port
in the lining whilst the cylinder is receiving water and similarly the outlet port in
the valve travels over the corresponding port in the lining whilst water is being
expelled from the cylinder. In whichever direction the engine may be running and
in whichever direction the water may be flowing through the passages of the valve
case the divided lining serves to prevent leakage and waste of water the part of the
lining on the inlet side is held by the water pressure up to the face of the valve, the
part of the lining on the outlet side is held up to the outlet passage in the valve
casing and the valve itself is pressed up to this latter part of the lining.
In order that my said invention may be fully understood and readily carried into
effect I will proceed to describe the drawings hereunto annexed.

page_text: a is the trunnion of one of the hydraulic cylinders of the engine. The engine
may (as is usual) have three cylinders set 120 degrees apart around a crank against
which rams working in the cylinders thrust. 6 is the valve it is a continuation
of the trunnion and is fixed upon its end. The valve is cylindrical on the outside and
within there is a cavity in communication with the water passage in the trunnion.
bare ports in the valve one is the inlet and the other is the outlet. The port 61
which is the inlet when the engine is running forward becomes the outlet when the
engine is reversed and vice versa. c is the valve case within which the valve turns
to and fro. d is a cupped leather making a tight joint between the valve case and
a shoulder upon the valve. d' is a similar cupped leather making a joint between the
case and an end or collar 2 screwed on to the valve. el and e² are two parts forming
a divided lining which is contained within the case c fitting closely around the valve
b. This lining is prevented from turning by flats el c¹ formed within the casing.
ex ex are ports formed in the divided lining. care passages to and from the case c
either becomes the inlet or the outlet according as the engine shaft is rotating in one
direction or the other. The passages c² ² of the several cylinders are connected with
two main pipes and these meet the inlet main and the outlet or drain pipe in a valve
box containing the reversing valve. By moving the reversing valve either main pipe
may be made to serve as the inlet whilst the other becomes the outlet.
The valve is shown in the drawing in the position it occupies when the cor-
responding ram is at the end of its stroke and the valve itself is at its mid stroke.
In the working of the engine the oscillation of the trunnion so moves the valve as
to open the ports alternately one pair of ports b' ex opening for the outstroke and the
other pair for the return. It will be seen that whichever of the passages c² becomes
the inlet the pressure of the water will tend to close the parts e¹ and e³ together
and to press all towards the mouth of the opposite passage c² and this independently
of any wear which may have taken place in the parts. Hence leakage past the valve
is not liable to occur whether the engine be running forward or backward.
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 :-
1. The improvements herein set forth in the valves of reversible hydraulic engines
consisting in constructing the same of parts bce and e² substantially as described.
2. My improvements in hydraulic engines by constructing the valves thereof
substantially as described.
Dated this 9th love of January 1880