Improvements in or relating to Pump-buckets and Valves.
Year: 1892

page_text: Date of Application, 15th July, 1892-Accepted, 24th Sept., 1892
COMPLETE SPECIFICATION.
Improvements in or relating to Pump-buckets and Valves.
A communication from RASSART FRERES, of 6, Rue des Ateliers, Gilly, in the
Kingdom of Belgium, Proprietor of Iron Foundries.
I, ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex,
Member of the Institution of Mechanical Engineers, 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 will be best understood by reference to the accompanying drawings
in which
Fig. 1 is a section of the improved elevating plunger or piston with its rod a²
and an indiarubber or other washer c applied to it.
Fig. 2 is a plan of the plunger or piston.
Fig. 3 is another plan of the said plunger seen from the top, with the washer of
indiarubber or other material applied to the upper surface of it.
Fig. 4 is a sectional elevation of the improved check valve.
Fig. 5 is a plan of the said valve, and
Fig. 6 is a plan of the same with an indiarubber or other washer 6ª applied to the
top thereof.
In Figs. 1 and 2 a designates the metal plunger or piston, and in Fig. 46 indicates
the movable portion of the check valve.
Referring in the first place to the elevating plunger, it will be seen from
Figs. 1 and 3 that its upper part simply consists of a plate, disc or washer c of
indiarubber or other suitable material adapted to act in its upward movement as a
valve against the inner walls of the body or cylinder of the pump, thereby exhausting
the air and creating a vacuum, while in its downward course it bends and allows the
water to pass.
The elevating plunger itself is provided with openings a' for the passage of thic
water drawn in as the piston is reciprocated by means of its rod a². These openings
may be of round, oval, square, triangular or other shape and in any suitable
number, those shown in the drawings merely exemplifying the invention. In fact
only one passage or orifice may do in some cases. These orifices whatever their
number are preferably formed near the edge of the piston or plunger a so that the
water is drawn in as it were in a circle. If the metal portion of the plunger be
constructed of more than one part, the joined parts may be encircled or bound
together by a suitable ring or loop of indiarubber or the like so as to prevent the
water drawn in from escaping through the joint or joints, and as a packing against
the walls of the pump cylinder any suitable sleeve or ring of indiarubber or the
like, applied to the periphery, may be employed, in which case the upper portion
of the plunger may be embedded in such ring or cylinder and the lower edge of the
latter bear against the lower part of the piston.
Referring now to the check-valve, it is well known that these valves as now
constructed merely consist of diaphragms arranged transversely within the cylinder
or body of the pump, in such a manner as to act as a cut-off when pressure is
exercised in one direction, but leave an open passage when pressure is produced in
the opposite direction. Now the improved check-valve, as shown in Fig. 4, consists
of two separate parts viz. a stationary part b', and a movable portion 6 fitted within
that stationary part and provided with an india-rubber or equivalent washer b*.
This stationary part the upper surface of which preferably presents the appearance
shown in Fig. 5 is provided with an opening 63 for the reception of the movable
part. When the plunger is operated the said movable part of the valve rises and
allows the water to pass. This check-valve may also be provided with a series of

page_text: orifices or perforations similar to those of the plunger a before described; or the
plunger itself may if preferred be so constructed as to combine its own functions
with those of a check-valve.
The stationary portion of the check-valve may also be embedded in a sleeve
or collar of flexible material to serve as packing between it and the cylinder
wall.
Both the plunger and valve may be made of any suitable metal or material and
the washers may be of indiarubber leather or other material, and both the main
bodies of the plunger and valve and their washers may vary according to circum-
stances and requirements in size and shape.
From the foregoing it will be understood that the object of the invention is to do
away with the ordinary wooden bucket plungers and the usual check-valves which
however often renewed are deficient in cleanliness and salubrity. The improved
piston and valve now offered on the contrary are capable of remaining indefinitely
in a fit condition for use requiring scarcely any repair, their operation is simple and
easy and they are not apt to become in any way dangerous to health.
Having now particularly described and ascertained the nature of the said inven-
tion as communicated to me by my foreign correspondent, and in what manner the
same is to be performed, I declare that what I claim is,-
or
1. An improved elevating piston plunger consisting of a stationary part provided
with orifices for the passage of the water a rod whereby the piston is reciprocated
and an upper removable portion consisting of a plate or washer of indiarubber or
other yielding material acting as a valve during the upward stroke of the piston or
plunger substantially as described and illustrated in the accompanying drawings.
2. The novel arrangement of the check-valve consisting of two distinct parts one
of which is permanently fixed and provided with an orifice and the other removably
fitted in that orifice in such a manner that when it is raised by the piston it allows
the water to pass substantially as described and illustrated in the accompanying
drawings.
Dated this 15th day of July 1892.
W. P. THOMPSON & BOULT,
Agents for thic Applicant.