Year: 1899

page_text: I, FREDERICK EDWARDS, of 62, Bishopsgate Street Within, in the City of
London, Engineer, do hereby declare the nature of this invention to be as
follows:
:-
This invention has reference to pumps of the kind described in the Specification
of Letters Patent No. 5175 dated 13th March, 1894, granted to me and wherein
the bucket acts as a piston valve and serves to displace water from a chamber
formed around and below the lower part of the pump barrel, which chamber is so
formed that water displaced by the bucket is guided by the wall thereof and
caused to pass through ports into the barrel above or on the other side of the
bucket.
The buckets of such pumps are usually constructed of gun metal, and are
preferably made double that is with an upper flat surface and lower conical one
and consequently may be somewhat more costly and difficult to make than the
ordinary kinde. Now an object of this invention is to reduce the cost of construc-
tion, and according thereto in one arrangement the bucket is constructed with a
cylindrical upper part, which may be formed of gun-metal and is turned to fit
the barrel so as to act as a piston valve, and a lower part, which may be made
of cast iron or other cheap material and may be if desired of slightly less
diameter than the barrel and is of a shape, for instance conical, corresponding
to the internal form of the lower part of the hereinbefore mentioned chamber
and will serve to displace water therefrom as described.
The lower part is formed with a central hole that fits the pump rod which
increases in diameter towards its lower end, and the periphery of the lower
part is formed with a shoulder on which the outer lower edge of the upper part
rests. The abutting surfaces of the two parts may however be made flat and the
joint between the top and bottom halves at the boss and at the periphery may
be in the same plane, or the central portion of the gun-metal bucket may be of
reduced depth, the depth of the central part of the lower portion being corre-
spondingly increased so that the joints will be in different planes. The two
parts are held in position by a nut that screws onto an enlarged portion of the
pump rod and occupies a recess in the top of the upper part, relative movement of
the two parts being prevented by a pin on one projecting into a recess on the
other.
In another arrangement the bucket may be constructed similarly to that
previously described with the exception that, the lower part is not connected
to or touching the upper part at its periphery, the advantages attaching to the
latter construction being that the surface in contact with the barrel is the full
depth of the bucket at its circumference a saving in cost is obtained owing to the
amount of gun-metal required at the boss being less, no machining whatever is
required at the adjacent circumferential portions of the two parts, the outer skin

page_text: of the lower part is not broken by machining, and is consequently less liable to
corrode.
Dated this 10th day of January 1899.
Improvements in or relating to Pumps.
I, FREDERICK EDWARDS, of 62, Bishopsgate Street Within, in the City of
London, Engineer, do hereby declare the nature of this invention, and in what
manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
This invention has reference to pumps of the kind described in the Specification
of Letters Patent No. 5175 dated 13th March 1894, granted to me and wherein
the bucket acts as a piston valve and serves to displace water from a chamber
formed around and below the lower part of the pump barrel, which chamber is 80
formed that water displaced by the bucket is guided by the wall thereof and
caused to pass through ports into the barrel above or on the other side of the
bucket.
An object of this invention is to reduce the cost of the buckets which are
usually constructed of gun metal, and are preferably made double, that is with
an upper flat surface and lower conical one, and consequently may be somewhat
more costly and difficult to make them than the ordinary kinds.
The accompanying drawings illustrate in central vertical section pump buckets
according to this invention. In the arrangement illustrated in Fig. 1, the bucket
is constructed with a cylindrical upper part a formed of gun metal and turned to
fit the barrel so as to act as a piston valve, and a lower part b made of cast iron
or other cheap material, which may, if desired, be of slightly less diameter than
the part a and than the barrel of the pump; the part b is of a shape, for instance
conical, corresponding to the internal form of the lower part of the bereinbefore
mentioned chamber and will serve to displace water therefrom as herein before
referred to. e is a central hole formed through the part 6 and adapted to fit the
pump rod d which increases in diameter towards its lower end, and is a shoulder
formed at the periphery of the said part and on which the outer lower edge of
the part a rests, the upwardly extending lip of the part 6 fitting into the part a.
The two parts are held in position by a nut f that screws on to an enlarged
portion of the pump rod d and occupies a recess in the top of the upper part,
relative movement of the two parts a and b being prevented by a pin g on one
projecting into a recess on the other; h, h¹ are stop pins respectively for preventing
the nut turning relatively to the part a and the part 6 turning relatively to the
rod.
In the arrangement shown in Fig. 2, the bucket is constructed similarly to that
shown in Fig. 1 but the lower part b is not connected to or touching the upper
part at its periphery, advantages attaching to the latter construction being that
the surface in contact with the barrel is the full depth of the bucket at its
circumference, a saving in cost is obtained owing to the amount of gun metal
required at the boss being less, no machining whatever is required at the adjacent
circumferential portions of the two parts a and b, and the outer skin of the
part b not being broken by machining is consequently less liable to corrode,

page_text: Fig. 3 shows a construction similar to that shown in Fig. 1 except that the lower
part is formed with a flat upper outer edge and the part a simply rests thereon.
The joints between the top and bottom halves at the boss and at the periphery
are in this construction in the same plane, thereby facilitating and cheapening
manufacture, but the central portion of the gun metal part a may be of reduced
depth, the depth of the central portion of the part & being correspondingly
increased so that the joints will be in different planes.
In the arrangement shown in Fig. 4 the gun metal part a is of ring-like form
and is provided at the top with an internal flange a¹ the cast iron part 6 is of
cylindrical shape with conical lower part, and is formed at its upper part with an
annular recess adapted to receive the internal flange a¹ of the part a. Studs a¹
and nuts a³ are provided for securing the parts a and b together. In this con-
struction practically the whole of the body of the bucket is of cast iron, and
practically only that portion which is in contact with the barrel and is subject
to wear is of gun metal; the said gun metal portion a is readily renewable at small
cost.
Fig. 5 shows a somewhat similar construction in which the body part of the
bucket is formed in two parts b, b' and the wearing part a which is in contact
with the barrel is formed with an internal flange a' adapted to be clamped between
the parts 6 and 61 when the nut is tightened up. In this construction the one
nut serves to secure all the parts together.
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:—
Pump buckets which act as piston valves and serve to displace water from
chambers formed around and below the lower parts of pump barrels constructed
substantially as described with reference to and shown in the accompanying
drawings.
To
T
T
1000
Dated this 10th day of November 200
FRED. EDWARDS,
W. Lloyd Wise,
46, Lincoln's Inn Fields, London, W.C., Chartered Patent Agent.
Agent for the Applicant.