Improvements in Pumps for Milk and other Fluids.
Year: 1890

page_text: Date of Application, 22nd May, 1890
Complete Specification Left, 21st Feb., 1891-Accepted, 4th Apr., 1891
PROVISIONAL SPECIFICATION.
Improvements in Pumps for Milk and other Fluids.
We, ROBERT ASHTON LISTEK, of the Victoria Iron Works, Dursley, in the
County of Gloucester, Engineer, and MIKAEL PEDERSEN, also of Dursley, in the
County of Gloucester, aforesaid, Foreman Engineer, do hereby declare the nature
of this invention to be as follows
Our invention relates to centrifugal pumps especially designed for pumping milk
but also applicable for pumping other fluids.
According to our invention we provide a concave disc having apertures running
from the centre to the periphery and curved. This disc is firmly fixed on the lower
end of a vertical spindle, on the upper end of which a driving pulley is placed.
The vertical spindle is carried in a long bearing in the centre of a dished plate
forming the top or cover of a bowl shaped casting which serves as a stand for the
machine.
The lower part of the bearing carries a ring which fits into a suitable seat pro-
vided for it on the inside of the stand, thus enclosing an annular space in which the
disc revolves.
The milk or other fluid is poured into the dish or hollow formed by the top plate
or cover and passes through holes or strainers into the interior of the stand and
from thence is conducted to the centre of the disc through passages left in the
ring.
The disc is caused to revolve rapidly so that the milk or other fluid is forced
through the said apertures into the annular space from which it escapes through
an outlet, or is conducted through pipes.
Some of the advantages of our invention are that no air-tight joint is required,
that as the shaft is suspended in its bearing no packing is required, and that the
shaft is self lubricating.
1000
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Pumps for Milk and other Fluids.
We, ROBERT ASHTON LISTER, of the Victoria Iron Works, Dursley, in the
County of Gloucester, Engineer, and MIKAEL PEDERSEN, also of Dursley,
aforesaid, 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 :-
Our invention relates to centrifugal pumps especially designed for pumping
milk but also applicable for pumping other fluids.
According to our invention we provide a bowl or vessel having a cover carry-
On the
ing at its centre a long bearing in which a vertical spindle rotates.
lower end of this spindle is a disc having curved passages extending from the
centre to the periphery, which disc rotates in a chamber formed at the lower
part of the bowl or vessel by means of a ring fitting into a seat.
To enable our invention to be fully understood we will describe the same with
reference to the accompanying drawing, in which-
Figure 1 is a view, half in elevation and half in vertical section, of a pump
provided with our improvements; and
Figure 2 is a view half in plan and half in horizontal section.

page_text: a is the bowl or vessel which is of circular shape in horizontal section, b is the
cover resting on the upper edge of the said bowl and having a funnel-shaped
opening c at its centre, and d is the long bearing carried at the centre of the said
cover by means of arms e, e and extending through the opening c.
fis the shaft extending through the bearing d, and y is the disc secured to one
end of the shaft f, a driving pulley h being secured to the other end.
i, i are the curved passages extending from the centre to the periphery of the
disc, and is the ring which fits into a seat in the vessel a and encloses an annular
space in which the disc rotates. The ring is preferably connected to the cover b
by a series of arms so that when the said cover is lifted, the ring will also be lifted
together with the disc and spindle thus enabling all parts to be thoroughly cleansed,
which is of vital importance in apparatus for working or heating milk and other
fluids easily susceptible to decomposition.
This ring in addition to forming a chamber in which the disc rotates also forms a
second chamberk in which during the working of the apparatus any froth collects
and from which it is discharged through a nozzle l.
m is a passage connected to the disc chamber and through which the milk is
discharged.
With the construction hereinbefore described it is obvious that, when milk or
other liquid is poured into the apparatus and the disc caused to rotate, it will flow
through the opening c into the centre of the disc whence it will pass into the
passages i, i and, owing to the rotation of the disc, forcibly issue from the said
passages and be caused to issue from the outlet m.
A tube is connected to the vessel at the lowest part to drain off any liquid in the
bottom thereof after working.
A passagen is formed in the shaft f to allow the bearing d to be lubricated.
Some of the advantages of our invention are that no air-tight joint is required to
be made that, as the shaft is suspended in its bearing, no packing is required, and
that the disc is relieved of all froth or air.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
1. In a centrifugal pump, the combination with a receiving vessel of a cover
carrying at its centre a spindle, at the lower end of which the pump-disc is fixed,
the said disc being located in an annular chamber in the said receiving vessel,
substantially as described.
2. In a centrifugal pump of the kind hereinbefore described mounting the pump-
shaft in the centre of the cover, and in such a manner that all the working parts
are removed with the cover, substantially as described.
3. In a pump of the kind hereinbefore described the employment of a chamber
for receiving the froth substantially as set forth.
4. The manufacture and use of the improved pump hereinbefore described and
illustrated in the accompanying drawing.
Dated the 21st day of February 1891.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants.