Improvements in Boiler Feed and other Pumps.
Year: 1893

page_text: Date of Application, 8th Nov., 1893
Complete Specification Left, 8th Aug., 1894-Accepted. 8th Sept., 1894
PROVISIONAL SPECIFICATION.
Improvements in Boiler Feed and other Pumps.
I, CLEMENT EDWIN OWENS of 22 Tudor Street, Whitefriars in the City of
London, Engineer, do hereby declare the nature of this invention to be as
follows:-
My invention has reference to pumps and more particularly to the feed pumps of
marine engine boilers. In these pumps the valve seats are generally driven,
screwed or cemented into the valve box casting, or in some cases the seats form
part of the casting itself. If it is required to remove a valve seat for repairs or
for other reason the operation is always difficult and sometimes impracticable, and
the seats are also liable to get injured.
Now the object of my invention is a mode of construction which will enable the
valve seats to be readily removed and without liability to injury.
With this object I form the valve seat or seats as part of a separate casting
which fits into the main valve box casting and has flanges to bear upon or against
corresponding beds on the main casting, and I secure the valve seat casting in place
by means of dogs, bolts or otherwise. When it is required to remove a valve seat
or seats it is only necessary to release the dogs, bolts or other holders, and the seat
or seats together with the valve or valves can then be lifted out without any risk
of injury.
In pumps such as the feed pumps of marine engines I combine the seats of the
suction and delivery valves in one casting adapted to fit into corresponding beds
made for the purpose in the main valve box casting.
Dated this 8th day of November 1893.
J. C. MEWBURN,
55 and 56, Chancery Lane, London, Chartered Patent Agent.
COMPLETE SPECIFICATION.
Improvements in Boiler Feed and other Pumps.
I, CLEMENT EDWIN OWENS of 22 Tudor Street, Whitefriars 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 ascertained
in and by the following statement :-
My invention has reference to pumps and more particularly to the feed pumps of
marine engine boilers. In these pumps the valve seats are generally driven,
screwed or cemented into the valve box casting or pump chamber casting or in
some cases the seats form part of the casting itself. If it is required to remove a
valve seat for repairs or for other reason the operation is always difficult and
sometimes impracticable and the seats are also liable to get injured.
Now the object of my invention is a mode of construction which will enable the
valve seats to be readily removed for repair or otherwise and without liability to
injury.
With this object I form the valve seat or seats as part of a separate casting or
piece which fits into the main valve box casting or pump chamber casting and has
flanges to bear upon or against corresponding beds on the main casting and I secure
the valve seat casting in place by means of dogs, bolts or other removable holders.

page_text: When it is required to remove a valve seat or seats it is only necessary to release
the dogs, bolts or other holders, and the seat or seats together with the valve or
valves can then be lifted out without any risk of injury.
In pumps such as the feed pumps of marine engines I combine the seats of the
suction and delivery valves in one casting or piece adapted to fit into corresponding
beds made for the purpose in the main valve box casting or pump chamber casting.
Figure 1 is a vertical section and Figures 2 and 3 sections on the lines A B
and CD respectively of so much of a boiler feed pump as is necessary to illustrate
my invention.
a is the main valve box casting; b is a separate casting which includes the seat c
for the suction valve d and the seat e for the delivery valve f. The casting has
flanges at y and to bear upon corresponding beds on the main casting as shown.
The casting b is secured in place by a dog i which is screwed down so as to press
upon the valve cover k and when it is required to remove the valve seats it is only
necessary to release the dog i and lift the cover k; the seats together with the
valves can then be lifted out without any risk of injury; the lifting can be
conveniently effected by means of a key passed into the top of the casting b and
made to engage therewith above the delivery aperture 1. It will be seen that the
suction valve seat c and the delivery valve seat e are combined in the one casting
and this is generally to be preferred but if desired there may be two separate
castings formed respectively with the two valve seats, each of these castings will
have a flange such as g or h to bear upon a corresponding bed in the main casting a.
The upper casting will in this case bear upon the top of the lower casting so that
the securing of the upper casting by means of the dog i and cover k will also
secure the lower casting.
Figure 4 is a vertical section and Figure 5 a section on the line A B of Figure 4
illustrating a construction which differs slightly from that shown in Figures 1, 2
and 3. The same letters of reference indicate corresponding parts.
The piece b which includes the seats c and e, may either be a metal casting or be
formed of lignum vitæ, vulcanite or other materials such as are used for valve seats
and valves.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is :-
In a boiler feed or other pump, a valve seat or seats formed as part of a separate
casting or piece which fits into the main valve box casting or pump chamber
casting and has flanges to bear upon or against corresponding beds on the
main casting and is secured in place by dogs, bolts or other removable holders,
substantially as and for the purpose hereinbefore described.
Dated this 8th day of August 1894.
J. C. MEWBURN & ELLIS,
55 and 56, Chancery Lane, London, Patent Agents.