An Improved Centrifugal Pump.
Year: 1899

page_text: Date of Application, 24th Jan., 1899-Accepted, 13th May, 1899
COMPLETE SPECIFICATION.
An Improved Centrifugal Pump.
I, HENRY BERNOULLI BARLOW, of the Firm of H. B. Barlow and Gillett, of
17, St. Anns Square, Manchester, in the County of Lancaster, Registered Patent
Agent (which invention has been communicated to me by John Moore, of 106,
Grey Street, East Melbourne, in the Colony of Victoria, Accountant), 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 that class of centrifugal pumps for which application
for British Letters Patent No. 14,926 was filed on the Seventh day of July, One
thousand eight hundred and ninety-eight, in my name, as a communication from
Jennings Pump Proprietary, Limited.
It consists in certain improvements in centrifugal pumps hereinafter described
by reference to the accompanying drawings in which,
Figure 1 is a vertical central section of a centrifugal pump embodying this
invention.
Figure 2 is a transverse section on line 2-2 Figure 1.
Figure 3 is a perspective view illustrating the construction of the runner of
the pump, whilst
Figure 4 is a perspective view showing the adjustable nose-piece hereinafter
described.
A represents the casing of this improved centrifugal pump and B the inlet
thereto, whilst represents the shaft upon which the runner is keyed or other-
wise secured. This runner consists of a comparatively large flat boss D) whicht
is mounted upon the end of the shaft Cand which carries the arms or blades I'
of the runner.
The forward or wearing surfaces of these blades or arms are
shod with removable liners or plates 12 and the front edges of said blades or arms
are connected together by a ring D³, which is let in flush with the front liner
or liners of the pump. Said blades or arms D' are inclined rearwardly and are
curved or bent back to a comparatively sharp curve at their outer ends as
illustrated at. d. They are set tangentially to a circle described around the
spindle C instead of being radial the object being to propel the material out-
wardly and thus assist the centrifugal action of the pump.
E represents an adjustable nose-piece consisting of a curved or other plate
fitting into slots o in the front and back liners of the pump and secured by
counter-sunk headed bolts el passing through slots 2 in the walls of the dis-
charge port. This plate or nose-piece is curved towards the centre of the runner
and its lower end projects down until it just clears the periphery of the runner.
With this construction of nose-piece its adjustment can be readily effected and
as it is supported within the slots e on each side of the pump it will be con-
siderably strengthened. With this construction of nose-piece combined with
the form of case shown in the drawing there is but little danger of breakage
owing to a stone or other obstruction becoming jambed between the runner and

page_text: the case, because in the event of a stone striking the edge of the nose-piece it
will be deflected to one side or the other, and if it passes in front of the nose-
piece it will be carried up the delivery pipe of the pump, whilst if it passes
behind the nose piece it enters a clear space which is left between the runner and
the case and cannot be jambed against such case by the runner.
The case is
made concentric with the runner from the nose piece round for at least one fourth
the circumference.
With the construction of runner above described a clear passage for the water
and other material will be provided from the suction pipe through the runner
to the periphery and thence up the discharge pipe and as the boss D) is let into
the back liner its face will practically be flush with such liner and consequently
the full width of the pump casing will be utilised.
The central parts of both the back and the front liners F F are made separate
from the remainder of the liner and can be adjusted separately or can be removed
when worn or can be turned round to bring a fresh part into wear.
Set screws
as shown may be used for effecting this adjustment or the liners can be adjusted
to the desired position.
The nose-piece E need not be made adjustable but can be fixed securely by
rivets or the like, although it is advantageous to be able to adjust it to take up
wear either in the ends of the blades or arms of the runner or in the end of the
nose-piece.
The blades or arms of the runner may be constructed with bevelled flanges
along the front and back edges in order to keep stones or other solid matter as
far as practicable away from the liners of the pump.
Having now particularly described and ascertained the nature of this said
invention and in what manner the same is to be performed, I declare that
what I claim is:-
1. In a centrifugal pump a runner constructed as above described with blades
or arms projecting from a comparatively large flat bess (such as D) the front
edges of said blades or arms being connected by a ring (such as 13) substantially
as and for the purposes herein described and explained and as illustrated in
the accompanying drawings.
2. In a centrifugal pump a nose-piece consisting of a plate of metal extending
across from side to side of the casing and fitting into slots (such as e) in the
front and back liners of the pump substantially as and for the purposes herein
described and explained and as illustrated in the accompanying drawings.
3. In a centrifugal pump a nose-piece consisting of a plate adjustably held
in position by nuts and bolts or the like passing through slots said plate being
fitted in slots in the side liners of the pump so that it can be adjusted nearer to
or further from the periphery of the runner substantially as and for the pur-
poses herein described and explained and as illustrated in the accompanying
drawings.
4. In a centrifugal pump a runner having arms or blades carried by or pro-
jecting from a comparatively large flat boss let into a recess in the back liner
so that it will be approximately flush therewith substantially as and for the
purposes herein described and explained and as illustrated in the accompanying
drawings.
5. In a centrifugal pump a runner having a stiffening ring (such as D³)
connecting the front edges of its blades or arms said ring being let in flush
with the front liner or liners of the pump substantially as and for the purposes
herein described and explained and as illustrated in the accompanying drawings.
6. In a centrifugal pump a nose-piece constructed of a curved plate of metal
in combination with a case the periphery of which is concentric with the runner
from the nose-piece round for at least one-fourth the circumference sufficient
clearance being left between the periphery of the arms or blades of the runner
and said casing to prevent stones or other obstructions becoming jambed, sub-

page_text: stantially as and for the purposes herein described and explained and as illustrated
in the accompanying drawings.
Dated this 23rd day of January One thousand eight hundred and ninety-nine.