Year: 1887

page_text: Date of Application, 13th Sept., 1887
Specification Accepted, 21st Oct:, 1887
to be particularly described and ascertained in and by the following statement:-
This invention relates partly to a flap valve pump provided with a suction air
chamber surrounding the barrel of the pump, and partly to a flap valve pump of
quadruple action which is principally intended for walled in grounds.
The first named pump is represented on the drawings,
Figure 1 being a front sectional elevation with the lid removed, showing the valves
and the flap in section.
Figure 2 is a vertical section through X, Y, Figure 1.
Figure 3 is a front elevation of the same.
Figure 4 shows part of a cross section of the pump on the line a-b, Figure 3. This
pump is arranged as follows:-
The valve-box or cylinder A of the pump has, as usual, a lid B through which passes
the shaft C, on which the flap-valve D is secured. The walls of the cylinder A are
hollow all round, and the space E thus obtained is connected below with the suction
pipe F, and serves as a suction chamber. The circular space E communicates like-
wise with the interior of the pump by the ports G (Figure 1) these ports being
opened and closed by means of the suction valves H on both sides of the pivoted
valve D. The top valves I are, as usual, placed immediately above the suction valves,
and the arrangement of the flap valve and the other valves does not materially differ
from that of a common flap valve pump. The top of the interior of the barrel com-
municates with the delivery pipe K. The space E, however, is not partitioned thereby,
for as shown in Figure 2, behind the enlargement into which the pipe K is screwed,
the space is narrowed to a passage L, thus effecting the communication between the
two halves of the space E. The space E can, however, be divided into two parts by
filling up the passage L, when two suction chambers are obtained, one for each valve.
The lid B is, as usual, screwed fast to the cylinder, packing being laid between the
surfaces of contact. In the centre of the lid is a stuffing box M through which the
shaft C of the flap valve passes. On the box M, and provided with a screw-thread,

page_text: there is a disc N, having wings O by which it may be turned round. The underside
of the disc N, when screwed down rests, with the intervention of packing, against a
ring P on the front of the lid. This ring is provided with holes Q1, Q, and Q
leading to the inside of the lid. These holes are so arranged in the lid that one or
more of them (Q" and Q¹¹¹) extend to the space under the delivery valves I, and one
or more of them (Q¹) to the space.above the said valves. When the disc N is screwed
outwards from the lid, the outer ends of the holes Q, Q", and Q¹¹, will be uncovered,
whereby the water in the pump is partly enabled to get out, and the air partly enabled
to get in. In order to effect a complete exhaustion of the pump the flap valve D
should be moved to and fro by means of a lever on the shaft C of the valve which will
facilitate the exit of the water on either side of the valve. The air thus enters through
the smaller holes Q and the water flows out through the holes Q¹ and Q. By this
complete exhaustion the pump will be frost proof.
The suction chamber of the pump works in the following manner. When the
pumping begins, there is air in the space E, constructed in the walls of the pump
cylinder. Part of this air goes out through the suction-valves H by the alternate
motion of the flap-valve, and the water is drawn in through the suction pipe F.
When the water has risen up to the ports it is drawn into the flap valve box, while the
top of the space E fills more and more with water.
Every time the flap-valve is moved towards either side, the water is drawn in
through the suction pipe, but when it returns in the opposite direction, the water
continues to ascend through the suction pipe, in order to fill the remainder of the
space or chamber E. When the flap valve has returned, and one of the suction valves
is opened, the pump acts, on the contrary by suction on the water in the pipe. Thus
it is clear. that there will occur no shocks in the suction pipe, but that a suction exists
and acts even in the turning movement of the flap valve, and it will be seen that a
pump arranged in this manner yields more water than a flap-valve pump of the
ordinary construction, and besides this the suction pipe may be of a smaller diameter,
because the water circulates therein without interruption.
The pump represented in Figures 5, 6, and 7 is principally intended for walled in
grounds, and for driving it, a wind motor may be advantageously employed. The
figures are respectively, an elevation, a vertical section, and a section on the line cd,
Figure 5.
A¹ is the pump cylinder, to the one end of which the collection chamber B₁ is
secured, and from which chamber the delivery pipe C' ascends. The pump has eight
valves in all, namely, four in each end of the cylinder. The valves F¹, G¹, H¹ and I'
in the end D¹' are provided with strengthening flanges, and are placed on the inner
side of the cylinder end, so that they may open inwards to the pump, and they
thus become suction valves. The valves L', M³, N', and O₁, in the cylinder end K³,
which are opposite to the suction valves and open towards the interior space B³, are,
on the contrary, placed on the outer side of the said end K', so that they open into the
space B and thus they constitute the delivery valves. On the shaft P which passes
through the pump cylinder, the flap-valve R¹ is fixed. In addition to the flap-valve R¹
the interior of the cylinder is divided into two equal parts by the fixed partition
wall S¹ which fits into a groove in the ends and in the sides of the cylinder and
extends close up to the centre of the flap-valve. When the flap valve is moving
in either direction, water enters the cylinder through two suction valves, and is at the
same time forced from the cylinder into the space B' through two delivery valves.
When the flap-valve returns in the opposite direction, the water enters into, and is
forced from the pump by the two suction and delivery valves situated diagonally
opposite to the valves just named. By imparting an oscillating motion to the flap-
valve the pump will thus have a quadruple action as compared with a single acting
pump with only one suction and one delivery valve. A metallic wire gauze T¹ fastened
on a projecting flange on the cylinder, and on the centre of the cylinder
end D surrounds the shaft P³, and prevents any solid matter from getting into the
pump.

page_text: Having now particularly described and ascertained the nature of the said invention,
and in what manner the same is to be performed, I declare that what I claim is:-
1st. In flap valve pumps, the arrangement which consists in forming the walls of
the pump cylinder hollow, in connecting the said space or hollow (E) partly with the
suction pipe (F), and partly with the ports to the suction valves (H); and in locating
part of the said space on the side of the suction valves opposite to that on which the
suction pipe enters, so that the chamber (E) may act as a suction chamber.
2nd. In flap valve pumps, the arrangement for exhausting the water, which consists
in providing the pump-lid B with holes (Q1, Q" and Q which are covered by a
disc (N) screwed upon the shaft box M, which disc may be screwed off when the
pump is to be emptied, so that the water may get out through the holes.
3rd. In flap valve pumps the arrangement which consists in providing one end of
the pump cylinder with four suction valves, and the other end with four delivery
valves, (which latter open to a receptacle (B¹) secured at the said end, and provided
with a delivery pipe) and in dividing the cylinder, partly by a fixed partition wall,
and partly by a flap valve pivoted at its middle into four partitions corresponding to
the valves.
WM. P. THOMPSON & Co.,
6, Lord Street, Liverpool,
Filing Agents for the Applicant.