Improvements relating to Valve Boxes for Feed Pumps of Steam Engines.
Year: 1896

page_text: Date of Application, 7th Feb., 1896
Complete Specification Left, 7th Nov., 1896-Accepted, 19th Dec., 1896
PROVISIONAL SPECIFICATION.
Improvements relating to Valve Boxes for Feed Pumps of Steam
Engines.
I JULIUS MARTIN, Engineer, of Ringwould, near Dover, Kent, do hereby
declare the nature of this invention to be as follows:-
The present invention has reference to the seating of the valves of feed pumps
of steam engines, which, as usually constructed, cannot be replaced, when worn,
without removing the valve box, and throwing the engine out of work for several
hours.
According to my invention, not only is the engineer able to remove, and replace
with another, a worn seating, on the road, if necessary, without taking off the
valve box, but it is possible to repair and put back the same seating with very little
trouble and delay, and consequently at a small expense.
In carrying out my invention, I provide the valve box of the feed pump with a
detachable lining of cast metal, turned to fit accurately the interior of the said
valve box, into which it is dropped from the top. The lining has, as regards its
upper part, or that portion which forms the seating for the usual valve of ball or
other form, a diameter larger than the rest of the casting. Thus, a collar is
formed which rests upon a corresponding annular ledge in the valve box. The
lower end of the lining is threaded, and extends beyond the bottom of the valve
box, to receive a nut, by which the lining is firmly fixed in position, and the collar
thereof is forced into close contact with the annular ledge above mentioned, thereby
making a tight joint.
The valve box is closed at top with the usual bonnet, which does not differ from
that in ordinary use. Between the valve box and the engine boiler, is preferably
arranged a cut-off cock, to be used when the seating is undergoing repairs, so
that it will not be necessary to put out the fires, or let off the steam during the
operation.
The valve-box lining has its lateral aperture for the passage of the feed water
corresponding with the position of the feed-water supply pipe. The aperture is
arranged somewhat low down, or in the narrower diameter of the lining.
To repair the seating, it will only be necessary to remove the securing nut, and,
after turning off the cock leading to the boiler, to knock out the lining. The head
of the lining, which forms the seating of the valve, is then levelled by filing or
cutting it down to make a fresh seat for the valve. The lining is then replaced in
the box, a metal washer or ring of suitable dimensions being introduced into the
box with the lining so as to rest on the ledge before named, thereby embracing and
supporting the lining at the proper height with reference to the bonnet, to permit
only the desired rise and fall to the ball or other valve.
It will be understood that the threaded portion of the lining must extend
sufficiently below the valve box to receive the nut which secures the lining in
position.
When the seating is again worn, it may be levelled, as before, a wider ring or
washer being introduced, to make up for the diminished depth of the head of the
lining.
Dated thin 7th donne Wah100
NEWTON & SON,
Agents for the Applicant.

page_text: Improvements relating to Valve Boxes for Feed Pumps of Steam
Engines.
I JULIUS MARTIN, Engineer, of Ringwould near Dover, Kent, 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:-
The present invention has reference to the seating of the valves of feed pumps
of steam engines, which, as usually constructed, cannot be replaced, when worn,
without removing the valve box, and throwing the engine out of work for several
hours.
According to my invention, not only is the engineer able to remove, and replace
with another, a worn seating, on the road, if necessary, without taking off the valve
box, but it is possible to repair and put back the same seating with very little trouble
and delay, and consequently at a small expense..
I have illustrated my invention in the accompanying drawing,-whereof,
Fig. 1 is a plan of the outside of a valve, with its connections;
Fig. 2 is a sectional elevation, and
Fig. 3 is a sectional elevation of the scating, detached..
A is the valve box, and B is the pipe leading to the boiler. b is a flange for
effecting the attachment to the boiler side. C is a pipe leading from the pump
(not shown) which pumps the feed water to the boiler through the valve in the
direction of the arrow.
In carrying out my invention, I provide the valve box A with a detachable
lining D of cast metal, turned to fit accurately the interior of the said valve box,
into which it is dropped from the top. The lining has, as regards its upper part,
or that portion which forms the seating for the usual valve E (which may be a
ball, as shown, or of other form), a diameter larger than the rest of the casting.
Thus, a collar d is formed which rests upon a corresponding annular ledge a in
the valve box. The lower end of the lining is threaded, and extends beyond the
bottom of the valve box, to receive a nut f, by which the lining D is firmly fixed
in position, and the collar d thereof is forced into close contact with the annular
ledge a above mentioned, thereby making a tight joint.
The valve box is closed at top with the usual bonnet G, which does not differ
from that in ordinary use. Between the valve box and the engine boiler is
preferably arranged a cut off cock H, to be used when the seating is under-
going repairs, so that it will not be necessary to put out the fires, or let off the
steam, during the operation.
The valve box lining has its lateral aperture c for the passage of the feed
water, corresponding with the position of the feed-water supply pipe C. The
aperture is arranged somewhat low down, or in the narrower diameter of the
lining.
To repair the seating, it will only be necessary to remove the securing nut f, and,
after turning off the cock H leading to the boiler, to knock out the lining D. The
head of the lining, which forms the seating of the valve, is then levelled by filing
or cutting it down to make a fresh seat for the valve. The lining is then replaced
in the box, a metal washer or ring 1 (see Fig. 3) of suitable dimensions being
introduced into the box with the lining, so as to rest on the ledge a before named
beneath the collar d, thereby compensating for the portion of the collar which has
been removed in levelling the valve seat.
It will be understood that the threaded portion of the lining must extend
sufficiently below the valve box to receive the nut which secures the lining in

page_text: position. When the seating is again worn, it may be levelled as before, a wider
ring or washer being introduced, to make up for the diminished depth of the head
of the lining.
The lining D, as shown, is provided with a plug hole d at bottom, which may
be closed with a plug or cock (not shown), through which the valve box may be
drained, when required.
When the seating has been so much lowered, by repeated levelling, as to be
incapable of further repair, an entirely new lining may be easily introduced. In
some cases, it may be desirable to take out a worn lining, and substitute another
while the first is being repaired, so that the engine may not remain idle.
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 :-
1. A removable lining for valve boxes which carries a seating for the valve, and
which can be removed for repairs, and replaced, together with a ring or washer, to
compensate for the portion of seating removed, in the manner set forth.
2. The construction and arrangement of valve box herein before described with
reference to the drawing, wherein a removable lining carrying the valve seat may
be substituted for a lining removed for repairs, without detaching the valve box
from the engine, or throwing the engine out of work.
Dated this 7th day of November 1896.
NEWTON & SON,
Agents for the Applicant.