Year: 1887

page_text: Date of Application, 4th Apr., 1887
Complete Left, 4th Jan., 1888
Complete Accepted, 13th Apr., 1888
We, WILLIAM CLARKE, Engineer, and JOHN BROKENSHIRE FURNEAUX, Engineer,
both of 121, Fenchurch Street, in the City of London, CHARLES DOWSEN, 5 Deckham
Terrace, Gateshead on Tyne, Engineer do hereby declare the nature of this invention
to be as follows:-
This invention relates to a construction of steam or power pumps whereby suction
and delivery valves can be dispensed with.
In the case of a duplex pump having two water cylinders adjacent to each other the
piston or plunger in each is so formed as to furnish three annular spaces in its length,
the centre space being the suction opening and the two outer spaces being the delivery
openings.
Water enters either cylinder first into the centre annular space of its piston and the
motion of the piston of the other cylinder draws the water through a port in the first
cylinder into the second cylinder and on the return stroke of the piston in the second
cylinder the water is forced out through the delivery port of the first cylinder the
piston in that cylinder then having its annular delivery space in position to allow of
the water passing out through this port. By the arrangement described, the piston
in each cylinder is made to serve as and in lieu of suction and delivery valves for the.
other.
This system of water distribution is not confined to duplex pumps but may be used
for triplex and quadruplex pumps.
007
W. LLOYD WISE,
46, Lincoln's Inn Fields, London, W.C.,
Agent for the Applicants.

page_text: Improvements in Steam or Power Pumps.
We WILLIAM CLARKE, Engineer, JOHN BROKENSHIRE FURNEAUX, Engineer, both
of 121 Fenchurch Street, in the City of London and CHARLES DowSEN of 5
Deckham Terrace, Gateshead on 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 relates to a construction of steam or power pumps whereby suction
and delivery valves can be dispensed with.
In the case of a duplex pump having two water cylinders adjacent to each other
the piston or plunger in each is so formed as to furnish three annular spaces in
its length, the centre space being the suction opening and the two outer spaces being
the delivery openings.
Water enters either cylinder first into the centre annular space of its piston and the
motion of the piston of the other cylinder draws the water through a port in the first
cylinder into the second cylinder and on the return stroke of the piston in the second
cylinder the water is forced out through the delivery port of the first cylinder the
piston in that cylinder then having its annular delivery space in position to allow of
the water passing out through this port. By the arrangement described, the piston in
each cylinder is made to serve as and in lieu of suction and delivery valves for the
other.
This system of water distribution is not confined to duplex pumps but may be used
for triplex and quadruplex pumps.
Our invention is applicable alike to pumps whose plungers are actuated directly or
indirectly by the pistons of steam cylinders or to pumps whose plungers are actuated
by power from a crank or its equivalent.
Fig. 1 is a vertical section of a pair of pump cylinders according to this invention,
C being the inlet or suction opening and A the outlet or delivery opening each being
common to both cylinders for its own purpose.
Fig. 2 is an outside view of the same pair of pump cylinders.
Fig. 3 is a cross section through the lino V W in Fig. 1 and
Fig. 4 is a cross section through the line X Y in Fig. 1.
E and E are water plungers formed in the manner shewn to give, in each, three
annular spaces F F F in plunger E and F F F in plunger E, each annular
space being divided from the next by a flexible spring ring or its mechanical
equivalent.
The inlet opening C into the cylinder G has a corresponding opening D into the
adjacent cylinder H and the outlet opening A from the cylinder G is connected to
the outlet or delivery ports J and K in cylinder G and to the corresponding outlet or
delivery ports L and M in cylinder H.
The ports N and O at the ends of cylinder G and the ports P and R at the ends of
cylinder H are cach carried to positions as shewn near the centre of the cylinder's

page_text: length, but the ports N and O terminate (at N1 0¹) in the cylinder H and the ports P
and R terminate (at P¹ R¹) in the cylinder G.
The action of the arrangement is as follows. Suppose the plunger E³ to be rising
toward the top in the direction of the arrow and that when in its mid stroke as shewn
the other plunger E' is just commencing its stroke in the same direction.
Water is being drawn in at the bottom of plunger E through the port R and
through this passage from the annular space F2 and through the inlet oponing C.
At the same time water is being forced out at the other end of cylinder H through
the port P down its passage to the annular space F' and thence through the outlet
opening A. By the time plunger E has reached the end of its stroke the plunger E'
is arranged to reach mid stroke and the suction and delivery openings are then in the
reverse positions and ready for the plunger E³ to draw and deliver water through the
passages it had been using for the reverse purposes during the up stroke. Similarly
plunger E opens and shuts and reverses the suction and delivery ports for admitting
and discharging the water pumped by plunger E¹.
The openings T' T² T³ TT and T are for convenience of shaping the various
suction, delivery and connecting ports opposite to them and are closed when this
has been done.
It will be seen from the foregoing that this invention is applicable to any even
number of pumps arranged with a suction and discharge common to all.
Having now particularly described and ascertained the nature of "the said
invention and in what manner it is to be performed we declare that what we
claim is:-
1. A pump having an even number of cylinders with a common suction inlet and
a common discharge outlet and cach cylinder containing a plunger or piston with
three annular passages or spaces around it, one serving as the inlet passage and the
other two as outlet passages to another cylinder substantially as described.
2. The arrangement of plungers and pump cylinders and the ports therein sub-
stantially as described with reference to the drawings.
Dated this 1th low of lan 1000
W. LLOYD WISE,
46, Lincoln's Inn Fields, London, W.C.,
Agent for the Applicants..