Year: 1886

page_text: I, WILLIAM DONALDSON, of 2 Westminster Chambers, Victoria Street, in the
County of Middlesex, Civil Engineer, do hereby declare the nature of this inven-
tion, and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement:-
This invention relates to pumping machinery allowing of the use of fluids of
any kind, either liquid or gaseous, under any given pressure (hereinafter called
motive fluid) for or towards pumping fluids of any kind either liquid or gaseous
under the same, or other pressure different from the pressure of the motive fluid.
The improvements are as follows reference being made to the accompanying two
sheets of drawings in which like letters describe like parts.
Fig 1, 2, Sheet 1' and Fig 3, 3° 4, 5, 6, 7 and 8 on Sheet 2 show the way in
which the valve V is actuated when it is moved in both ways by the pressure of
the fluid.
1
Fig. 1 is a vertical section through the centres of the automatic valvė
cylinder CC and the motive power cylinder C¹. Fig. 2 a vertical section at right
angles to the former through the motive power cylinder. Fig. 3 a section
through o-p Fig 1 and 2 the inlet port of high pressure water for actuating
the valve V and through motive piston P¹ when the latter is in its highest position.
Fig. 3 a section through q-r tank for receiving waste waters. Fig. 4 a section
through mn outlet port e from bottom of valve chamber and through motive
piston P when the latter is in its highest position. Fig. 5 a section through k―l,
the inlet porthole I of high pressure water for working the pump. Fig. 6 a section
through ij porthole e' connecting top of valve chamber with both high pressure
liquid and exhaust alternately. Fig. 7 a section through g-h motive cylinder
showing p the passage for conducting the high pressure water to the top of the
valve chamber C. Fig. 7 is plan of top of working cylinder and Fig. 8 a section
through e-f motive cylinder showing the passage e for connecting the bottom of
the valve cylinder C³ with the exhaust port es when the motive piston is in its
lowest position.
The passage i Fig* 3, 4 and 5 forms a communication between the inlet port I of
the high pressure water and the valve cylinder C³ C. When the piston P' is in
its highest position the passage p' forms a communication between the passage i
and the passage e leading to the annular chamber C³ at the bottom of the valve
piston and the high pressure liquid is by these passages admitted to the underside

page_text: of the valve piston and causes the valve V Fig. 1 to rise until the passage p¹ is
opposite the inlet porthole I. The high pressure water thus flows through the
passage p¹ into the passage po and through this into the motive cylinder C³: At
the instant the passage p* opens a communication between the high pressure water
passage and the passage e leading to the underside of the valve chamber the
passage p Fig. 6 opens a communication between the passage leading to the
upper side of the valve chamber C and the passage e³ and exhaust port e³.
The high pressure water on the underside of the valve piston V causes the
piston V to rise and the water above the valve piston V escapes by the passages e³, pª
and ea and the exhaust porthole e³.
When the piston P¹ is in its lowest position the passage p' is opposite the
passage i and forms a communication between the high pressure water in the inlet
port I and the top of the valve chamber C' by means of the passages p and e³.
At the same time the passage e Fig. 8 forms a communication between the
passage e and the exhaust port e by which the water on the underside of the
piston V escapes. The valve piston V then falls until the passage p' is opposite
the exhaust port E and the water from the motive pressure cylinder flows through
the passages p p¹ and the exhaust porthole E, whilst the pump barrel is being
filled.
The weight of the pistons P' and P2 must be counterbalanced by the weights W
Buspended by ropes or chains passing over the pulley wheels w and attached to the
piston P as shown in Fig. 2.
The magnitude of the weights W must be such as to cause the pistons on the
opening of the exhaust port E to rise up to the highest position necessary to
connect the passage p* with the exhaust port e from the valve chamber.
Instead of allowing the waste waters which are not discharged through the
passage to fall into a receiver they may be pumped directly to their final
destination by a pump worked automatically by means of the alternations of
pressure in the valve cylinder C³ so that the auxiliary pump will make exactly the
same number of strokes as the pump to which it is attached.
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
In a pump actuated by fluid pressure the combination of the counterweighted
piston, the plunger forming its rod, and the slide valve with ports and passages
arranged for automatic action, substantially as herein described and illustrated by
the accompanying drawings.