Improvements in or Applicable to Centrifugal Pumps and some kinds of Turbines and Fans.
Year: 1889

page_text: Date of Application, 2nd Sept.. 1889
Complete Specification Left, 2nd June, 1890--Accepted, 5th July, 1890
Improvements in or Applicable to Centrifugal Pumps and some
kinds of Turbines and Fans.
I, ALFRED ROBBINS of Frog Mill Andoversford in the County of Gloucester and
of No. 6 Section Manchester Ship Canal Works, in the County of Chester Engineer
do hereby declare the nature of this invention to be as follows:-
In centrifugal pumps as used at the present time wear rapidly takes place on the
sides of the internal revolving disk or fans and the side of the casing thereof. After
a time a leakage takes place at the sides causing great loss of power in the pump.
My invention is designed to obviate this evil and is applicable also to some kinds of
turbines & ventilating and other fans. In one or both sides of the casing, as near the
circumference as practicable but outside the inlet orifice I place a brass, bronze, or
other metal ring, or
packing fitting in an annular groove concentric with the axis of
the fan and press this against the fan by adjusting screws, springs, or equivalent
mechanism, as the sides of fan or the these rings wear. The said rings are adjusted
by the said screws, and when they are worn out another ring can be at once be applied.
The use of these rings thus obviate the necessity now so frequent and so annoying
of having to true up and turn out the casing so as to take up the wear.
Dated this Thirty-first day of August 1889.
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Patent Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in or Applicable to Centrifugal Pumps and some
kinds of Turbines and Fans.
I, ALFRED ROBBINS of Frog Mill, Andoversford in the County of Gloucester and
of No. 6 Section Manchester Ship Canal Works in the County of Chester, 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 certain improvements in centrifugal pumps and in some
kinds of turbines and fans.
In centrifugal pumps as used at the present time, wear rapidly takes place on the
sides of the internal revolving disc or fan, and the sides of the casing thereof. After
a time a leakage takes place at the sides, causing great loss of power in the pump.
My invention is designed to obviate this evil and is applicable also to some kinds of
turbines and ventilating and other fans.
The invention may be described by reference to the accompanying drawing, in
which―
Figure 1 is a front elevation partly in section of a centrifugal pump fitted with my
improvement.
Figure 2 is an end elevation of the same.
A is the pump casing, B the inlet and C the outlet. D is the internal disc or fan
and E the shaft thereof.
In carrying the invention into effect, I place at one or both sides of the casing a
brass, bronze or other metal ring F within an annular groove or recess G, which is
preferably concentric with the axis of the fan and is located outside the inlet orifice B¹
and as near as practicable to the circumference of the fan. The ring is made a neat
fit within its groove and is adapted to be pressed against the adjacent side of the

page_text: disc D by means of adjusting screws H, or by springs or equivalent mechanism. The
screws H are provided with lock nuts J.
As the sides of the disc or the rings wear, the latter are adjusted by the screws H,
The use of
and when the rings are worn out, they may be replaced by new ones.
these rings thus obviates the necessity of having to take up the wear by the expensive
process of facing up the casing and disc.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
In a centrifugal pump or in some kinds of turbines or fans, a loose bearing ring
such as F fitting into a groove or recess in the side of the casing and bearing against
the adjacent side of the disc or fan, and means for adjusting the ring as it or the side
of the disc (or both) becomes worn, substantially as and for the purposes described.
D
1
1
CM1000
WM. P. THOMPSON & Co.,
Of Liverpool, Manchester, and London, Patent Agents.
WM. P. THOMPSON & Co.,
Of Liverpool, Manchester, and London, Patent Agents.