Improvements in Steam and other Valves.
Year: 1893

page_text: Date of Application, 19th Apr., 1893
Complete Specification Left, 21st Sept., 1893-Accepted, 4th Nov.; 1893
PROVISIONAL SPECIFICATION.
Improvements in Steam and other Valves.
I, BEN WHITEHEAD, Boiler Inspector, of 15 Norfolk Street, Mount Pleasant,
Swansea, in the County of Glamorgan, do hereby declare the nature of this
invention to be as follows:-
This invention relates to the manner in which I construct and arrange steam and
other valves, whereby the pressure acting on the valve remains equal to that of the
main supply from the boiler or other vessel without being affected by the release
area of the valve when opened.
In carrying my invention into effect when constructing my improved valve for
use as a steam valve to be loaded with dead weights or held in position by a spring-
controlled lever and weight in the ordinary way, I make the main or valve seat
with a knife edge or mitre annular edge or ring for making a joint or seat upon the
valve bush or seating. The upper portion of the valve above its seating surface or
ring I make preferably of cylindrical form having a central opening or recessed
surface at the upper or outer solid end of the body for the purpose of receiving a
pointed pin, lever or spindle from any ordinary valve lever or spring or dead
weight. The bottom of the valve body I construct as an open cylinder having
its plain or cylindrical portion turned to pass through a bored or truly circular
ring arranged or carried upon the seating or bush which receives the valve.
Between the plain cylindrical base and the upper closed end of the valve body I
form a stem or central or other web or webs for tieing each portion together; the
space surrounding this stem or stems and forming an annular steam space I make
as far as possible of equal area upwards and downwards, so that the steam held
within is virtually not acting upon the valve to raise it from its seat, being in
equilibrium or balanced while within this reservoir space. Thus when the valve is
raised from its seat the steam passing from this reservoir space does not affect the
pressure which is causing the valve to be lifted, seeing that the plain or open-
ended base is exposed to a different area of steam to that which is supplying and
passing from the valve; the pressure within this balanced area remains practically
:a constant one, or one not affecting the operation of opening or closing. The
valve seat I prefer to make with a circular or other body terminating in a bored or
other, cylindrical ring or collar, through which the valve end may work, and the
sides, or walls of this seat or bush I prefer to make with openings or holes to permit
the steam to pass freely from the steam space of the boiler to the balanced
reservoir space of the valve.
I make my valve bushes or seats, as plain castings or as separate fittings for
attachment to any existing valve box, and I modify the shape and arrangement of
the valve and, its seat to suit any particular or other requirement.
When constructing my improved valve for use in positions where extreme sensitive-
ness is required, I arrange the valve seating with a number of ports provided within
one portion of its body or neck, these ports being covered or closed internally by
means of a ring which I cast on or connect to the valve in such a manner as to
cause the openings of the ports or passages to control the admission and escape of
steam from the valve. The admission, to the annular balanced space within the
valve being thus limited to the height of the lift or travel of the valve from its
seat face.
I employ my improved valves with advantage as safety valves, although I do
not limit the application of the valve to any form or type of boiler or to any
close of wolve

page_text: Similarly I arrange or modify the valve to suit air, gas or water supply purposes,.
instead of simply arranging it as a steam valve as hereinbefore described.
Dated this 18th day of April 1893.
MARKS & CLERK,
13, Temple Street, Birmingham, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Steam and other Valves.
I, BEN WHITEHEAD, Boiler Inspector, of 15 Norfolk Street, Mount Pleasant,
Swansea, in the County of Glamorgan, 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 the manner in which I construct and arrange steam and
other valves, whereby the pressure acting on the valve remains equal to that of the
main supply from the boiler or other vessel without being affected by the release
area of the valve when opened.
In the accompanying sheet of explanatory drawings-
Figures 1, 2 and 3 illustrate in sections my improved valve, while Figures 4 and 5
illustrate in sectional and side elevations respectively my improved valve arranged
as a safety valve.
In carrying my invention into effect when constructing my improved valve A
(Figure 1) for use as a steam valve to be loaded with dead weights or held in
position by a spring-controlled lever or lever and weight in the ordinary way, I
make the main or valve seat a with a knife edge or mitre annular edge or ring for
making a joint or seat upon the valve bush or seating B. The upper portion of
the valve above its seating surface or ring I make preferably of cylindrical form
having a central opening or recessed surface A' at the upper or outer solid end
of the body for the purpose of receiving a pointed pin, lever or spindle from any
ordinary valve lever or spring or dead weight. The bottom of the valve body I
construct as an open cylinder having its plain or cylindrical portion A² turned to
pass through a bored or truly circular ring B' arranged or carried upon the seating
or bush which receives the valve.
Between the plain cylindrical base A2 and the upper closed end of the valve.
body A. I form a stem A³ or central or other web or webs for tieing each portion
together; the space c surrounding this stem or stems and forming an annular steam
space I make preferably of equal area upwards and downwards, so that the steam
held within is virtually not acting upon the valve to raise it from its seat, being in
equilibrium or balanced while within this reservoir space. Thus when the valve is
raised from its seat the steam passing from this reservoir space does not affect the
pressure which is causing the valve to be lifted, seeing that the plain or open-ended
base A is exposed to a different area of steam to that which is supplying and
passing from the valve through the space c; the pressure within this area remains
practically in a state of equilibrium under the various stages of the operation of
opening or closing. The valve seat B I prefer to make with a circular or other
body terminating in a bored or other cylindrical ring or collar B', through which
the valve end may work, and the sides or walls of this seat or bush I prefer to make
with openings or holes 6 to permit the steam to pass freely from the steam space of
the boiler to the balanced reservoir space c. of the valve.
I make my valve bushes or seats as plain castings or as separate fittings for
attachment to any existing valve box, and I modify the shape and arrangement of
the valve and its seat to suit any particular or other requirement.
When constructing my improved valve for use in positions where extreme
sensitiveness is required, 1 arrange the valve seating with a number of ports
provided within one portion of its body or neck, these ports being covered or closed

page_text: internally by means of a ring D (Figure 2), which I cast on or connect to the
valve in such a manner as to cause the openings of the ports or passages to control
the admission and escape of steam from the valve. The admission to the annular
balanced space within the valve being thus limited to the height of the lift or
travel of the valve from its seat face.
When altering old valves to suit my present invention I sometimes attach to or
form upon the valve a stem E as at Figure 3. I likewise construct new valves
with this form of stem, and by modifying the valve seating or box i as shown at
Figure 3 the angle could be graduated to permit of only a required volume of
steam to pass, thus reducing the pressure in the balanced space when desirable and
giving great sensitiveness to the valve.
I employ my improved valves with advantage as safety valve, as shown at
Figures 4 and 5, the steam acting upon the bottom F of the valve and also passing
out through the annular balanced or partly balanced area K, under the valve seat G
to the escape branch H. The stem L of the valve being either formed with or
attached separately to the valve G¹.
I arrange or modify the valve to suit air, gas or water supply purposes, instead
of simply arranging it as a steam valve as hereinbefore described.
I do not limit the application of my improved valves to any particular form of
valve chamber or to any special type of safety valve, but I employ the same
essential features of a double area, and independent relief and pressure receiving
surfaces as hereinbefore described when modifying my valve to suit any particular
requirement.
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 :-
1. The construction of valves in which an independent pressure receiving area is
arranged beneath or away from the valve seating or closing area, substantially as
and for the purposes hereinbefore described..
2. The construction of steam and like valves having a stem such as A³ or E
carrying a separate pressure receiving base or end such as A² or F substantially as
and for the purposes hereinbefore described and as illustrated in the accompanying
drawings.
3. In a valve for use in controlling the escape or supply of steam, air, gas water
or like purposes, the arrangement of an annular chamber such as c or K within the
bush or valve seating such as B' and G, substantially as and for the purposes.
herein before described and as illustrated in the accompanying drawings.
Dated this 19th day of September 1893.
MARKS & CLERK,
13, Temple Street, Birmingham, Agents for the Applicant.