Year: 1887

page_text: Date of Application, 16th Apr., 1887
Complete Left, 16th Jan., 1888
Complete Accepted, 17th Feb., 1888
I, JOHN DOBSON WARDALE, of Redheugh Engine Works, Gateshead-on-Tyne, in
the County of Durham, Engineer, do hereby declare the nature of this Invention
to be as follows:-
My Invention has for its object to provide pumping engines which are not only more
effective in pumping water but which also act efficiently in pumping matter which is
semi-fluid or not perfectly fluid without the valves being liable to become clogged by
solid matter which may be passed through the pump.
According to my Invention I open the suction and delivery passages to and from
the pumping cylinder by means of a slide valve the inner part of which opens to the
suction passages and the outer part of which opens to the delivery passages.
The pressure of the delivery acting upon the back of the valve keeps it against the
port faces and any pressure in excess of what may be desirable I take off the back of
the valve by a counter-pressure slide working in the chest with the valve or by a non-
reciprocating box pressed against the back of the valve by the delivery pressure the
valve working between this box and the port faces. The inside of the said slide or
box is in communication with the suction which may be effected by drilling a hole
through the back of the slide or box to give communication with the suction port of
the valve. The said valve is preferably worked from the crank shaft by an eccentric
or cam or by eccentrics or cams working both the said valve and the valve of the steam
or motive power cylinder. By crossing the ports of the steam, or motive power,
cylinder so that they open to the valve chest thereof at the ends opposite to those at
which they communicate with the steam or motive power cylinder one eccentric or
cam gives motion to the valves of both the steam or motive power cylinder and pump
cylinder. By the application of a slotted link over the eccentric or cam or
eccentrics or cams the points of connection of the rods of the valves to the
said slotted link determine the travel of the valves and I am enabled to vary the stroke
of each valve as desired.
By the use of a slide valve for the pump arranged as described there is a minimum

page_text: of friction in working against high pressures and the valve fits itself to the face
against which the said valve works as they both wear and there is great durability and
efficiency of action.
By the relative arrangement of the ports of the steam or motive power cylinder
and the pump, and of their valves, as described, the steam or motive fluid is admitted
to that side of the piston in the steam or motive power cylinder which gives the
downward or forward stroke, whilst the suction of the pump is opened to the corre-
sponding end of the pump cylinder, and vice-versâ in the return stroke. The ports or
openings to and from the pump cylinder can also be lengthened without lengthening
the stroke of the valve of the steam or motive power cylinder.
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, W.C.,
Agents for the said John Dobson Wardale.

page_text: improvements in Pumping Engines.
I JOHN DOBSON WARDALE of Redheugh Engine Works Gateshead on Tyne in the
County of Durham 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 :-
My Invetion has for its object to provide pumping Engines which are not only more
effective in pumping water than are ordinary pumps but which also act efficiently in
pumping matter which is semi-fluid or not perfectly fluid without the valves being
liable. to become clogged by solid matter which may be passed through the
pump.
I will describe my Invention with reference to the accompanying drawings
Figure 1 of which shews a vertical section through the steam and water cylinders.
Figure 2 is a section through a water valve shewing a modification in the arrangement
as hereinafter described. Figure 3 is a side view of a pump shewing means for
enabling the travels of the steam and water slides to be different with the same
eccentric.
Figure 4 is a cross section of the steam ports and passages on the line 1; 2 Figure 1.
Fig. 4 is a front view of the steam chest with valve removed. Figure 5 is a cross
section of the water cylinder and valve Figure 1 taken on the line 3, 4 of that Figure
and Figure 6 is a section on the line 5, 6 Figure 7 which is a modification of the
arrangement illustrated in Figure 3 shewing means for enabling the travels of the
steam and water slides to be adjusted independently of each other.
According to my Invention I open the suction and delivery passages to and from
the pumping cylinder by means of a slide valve A the inner part of which at a opens
to the suction passages at B and the outer part of which opens to the delivery
passages at C. The pressure of the delivery acting upon the back of the valve A
keeps it against the port faces at 6 and any pressure in excess of that which may be
desirable I take off. the back of the valve by a counter-pressure slide D working in
the chest with the valve as in Figure 2 or by. a non-reciprocating box D' pressed
against the back of the valve by the delivery pressure the valve working between this
box and the port faces as shown by Figure 1. The inside of the said slide or box
in
should be kept as free as possible of leakage of delivery fluid and it is preferably.
communication with the suction which may be effected by drilling a hole or holes as
at a² (Figure 5) through the back of the slide A and box D2 to give communication
with the suction port of the valve, but instead of this a hole may be made as at y for
any leakage water to drain out and in such case atmospheric pressure would be in the
box. The holes a² giving communication with the suction are however preferred as then
partial vacuum is obtained in the box. E is a spring for keeping the slide D box D2
and valve A against the faces h, h², and b'forward when the delivery pressure is off.
The said box or slide may be of any suitable shape and is mounted so as to be capable
of being pressed forward by this spring either by mounting it in the faced part e in
the arrangement Figure 2 or by mounting it in the part of the casting e² in the
arrangement Figure 1. It should be provided with close fitting packing rings x. The
...

page_text: said valve A is preferably worked from the crank shaft F by an eccentric or cam or
by eccentrics or cams working both the said valve A and the valve G of the steam or
motive power cylinder I. By crossing the ports 1 of the steam or motive power
cylinder (as shewn at the top of Figure 1 and in the sectional plan Figure 4 and front
view Figure 4) so that they open to the valve chest thereof at the ends opposite to
those at which they communicate with the steam or motive power cylinder I one
eccentric or cam as at J can be employed to give motion to the valves of both the
steam or motive power cylinder and pump cylinder by the rods g and a³ respectively.
By the application of a slotted link K (centred to the fixed pin k) over the eccentric
or cam or eccentrics or cams (as shewn in Figures 3, 6 and 7) the points of connection
at g² and a' of the rods of the valves of the engine and of the pump respectively to
the said slotted link K determine the travel of the valves and I am thus enabled
to give any required relative strokes of each of the said valves as desired by attaching
the rods to the link K at points nearer to or further from the pin k and I can make
the points of connection adjustable by making them in blocks capable of being
moved along and fixed in slots k³ by means of screws k as shewn in Figure 7.
By the use of a slide valve for the pump arranged as described and shewn in
Figures 1, 2 and there is a minimum of friction in working against high pressures
and the valve fits itself to the face against which the said valve works as they both
wear and there is great durability and efficiency of action.
By the arrangement of the crossed ports 1 of the steam or motive power cylinder as
described relatively with those of the pump and of their valves the steam or motive
fluid is admitted to that side of the piston in the steam or motive power cylinder which
gives the downward or forward stroke whilst the suction of the pump is opened to the
corresponding end of the pump cylinder and vice versa in the return stroke. The
ports or openings to and from the pump cylinder can also by means of the link attach-
ment K be lengthened without lengthening the stroke of the valve of the steam or
motive power cylinder.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed I declare that what I claim is :-
1st. In pumping engines a slide valve the inner part of which opens to the suction
passages and the outer part of which opens to the delivery passages and which is
provided with a counter pressure slide moving with it or by a non-reciprocating-box
bearing against its back substantially as and for the purposes hereinbefore described
and illustrated by Figures 1, 2 and 5 of the accompanying drawings.
2nd. In pumping engines ports for the steam or motive power cylinder crossed so
that they open to the valve chest thereof at the ends opposite to those at which they
communicate with the steam or motive power cylinder so that one eccentric or cam
can be employed to give motion to the valves of both the steam or motive power
cylinder and of the pumping cylinder substantially as hereinbefore described and
illustrated in Figures 14 and 4 of the accompanying drawings.
3rd. In pumping engines a slotted link over the eccentric or cam for working the
slide valves of both the steam or motive power cylinder and of the pumping cylinder
so that the points of connection of the valve rods to the said slotted link determine the
travel of the valves and the travel of each can be varied as desired whether an
adjusting arrangement (as in Figure 7) be used or not substantially as hereinbefore
described and illustrated in Figures 3, 6 and 7 of the accompanying drawings.
4th. The arrangement and combination of parts constituting the pumping engine
herein before described and illustrated in the accompanying drawings whether the
slotted link K be used therewith or not.
1000