Improvements in and relating to Fluid Pressure Reducing or Regulating Valves.
Year: 1896

page_text: PROVISIONAL SPECIFICATION.
Improvements in and relating to Fluid Pressure Reducing or
Regulating Valves.
1, WILLIAM Ross, of 96 Buchanan Street, in the City and County of
Glasgow, Engineer, do hereby declare the nature of my invention to be as
follows:-
This invention has reference to improvements in the construction of reducing or
regulating valves for steam, water or other fluid pressure.
This valve would consist preferably of a globular or bulbous casting of iron or
other suitable metal, with inlet and outlet radial ported branches in line on opposite
sides and a top open branch when set vertically. A broad flange would be formed on
this top branch and to it would be bolted the lower broad disc flange of a long
necked cap or casing. Between these flanges would be secured a diaphragm con-
sisting of thin metallic disc plates, and over the diaphragm and within the cap
would be fitted one or more helical or spiral springs, while a screwed on stud
would work on top of cap and bear over the springs to bring any regulated pressure
over the diaphragm when actuated by a hand screw key, but instead of springs
weights may be substituted. A spindle would pass through the centre of diaphragm,
its upper end projecting a short distance up within the spring coils, while its lower
end which may be screw threaded would project down near to bottom of valve
casing A hollow cylindrical brass bush or liner would by these improvements be
fitted within the valve casing between the bottom of diaphragm and the lower end
of casing, and radial slits or openings would be formed in it round the part where
the ported branches are formed in valve casing. This bush would be formed with
a screw thread at its upper end to screw into a corresponding screw threaded part of
valve casing, while the lower end of bush would bevel and be secured within a central
ring flange cast or formed on casing opposite the ports, and the lower end of this bush
would and ring flange would form a seating for a centre piston or other valve. This
latter valve would consist of a hollow spindle working over the centre spindle of
diaphragm and be held in position by a crosshead or link nut with centre screwed
eye and jam nut, and may have a piston on its upper end or a leather turned down
washer screwed between collars, while a leather washer may be similarly secured
between collars at lower end of spindle where a bevelled edge may be formed and
radial guide ribs may be formed round spindle, while below this valve the casing
may be either close formed, or have an opening fitted with a screwed on cap, and a
projecting lip may be fitted on valve to give an increased resistance and prevent
clattering on seating, and when close formed at bottom the hollow spindle would
be inverted and the securing link nut be screwed on at top.
The action of the valve is as follows:-Steam or other fluid of high pressure on
being admitted from a boiler or pipes will pass freely through the valve, and be
reduced on the delivery side to the pressure desired. This is effected by the
compression or tension on loading spring until the pressure in pipes on outlet side
is sufficient to overcome the tension of loading spring when the low or reduced
pressure will be admitted from outlet side of valve through the stem, and operate
below the moveable piston or flexible diaphragm. The valve will thus gradually
open or close with an slight rise or fall of pressure on the outlet side.

page_text: By these improvements the inner liner or brass bush with seating is removable,
as also the working parts, so that the valve can be easily repaired when these parts
get worn out.
Dated 10th T
1000
W. R. M. THOMSON & Co.,
96 Buchanan Street, Glasgow, Agents.
Improvements in and relating to Fluid Pressure Reducing or
Regulating Valves.
I, WILLIAM Ross of 96 Buchanan Street, in the City and County of Glasgow,
Engineer, do hereby declare the nature of my invention, and in what manner
the same is to be performed to be particularly described and ascertained in and
by the following statement in writing, that is to say :-
This invention has reference to improvements in the construction of reducing or
regulating valves for steam, water or other fluid pressure.
And in order that my said invention and the manner of performing or carrying
same into practice may be properly understood I have hereunto appended a sheet
of explanatory drawings in which the same reference letters are used to indicate
corresponding parts in all the figures where shown.
Figure 1 is a sectional elevation of a complete valve as constructed in accordance
with my improvements.
Figure 2 is an external plan view corresponding to Figure 1.
Figure 3 is a detached elevation and Figure 4 a horizontal section of the
detachable cylindrical bushed seating shown in sectional elevation in Figure 1.
Figure 5 is a detached elevation of the piston valve shown in section in Figure 1
and Figure 6 detached views of the end cap piston fittings shown in section
in Figure 1.
Figure 7 shows a detached sectional elevation of the valve chest in which the
bushed seating is screw threaded at its lower end instead of at its upper end
as shown in Figures 1 and 3, and
Figure 8 is a view corresponding to Figure 3 showing the lower end screw
threaded.
Referring to these drawings:-
This valve would consist preferably of a globular or bulbous casting A of iron or
other suitable metal, with inlet and outlet radial ported branches A A' in line on
opposite sides and a top open branch A3 when set vertically. A broad flange A
would be formed on this top branch A³ and to it would be bolted the lower broad
disc flange al of a long necked casing a. Between these flanges A' a' would be
secured a diaphragm consisting of thin metallic disc plates b secured at its centre to
a disc 61 which is in turn bolted to a top disc cover &, while between the disc 6' and
cover b² a diaphragm 61 may be fitted, and over the diaphragms and within the
casing a would be fitted one or more helical or spiral springs B, while a cap a³
would be secured by a screw nut a³ to top of casing a.
A loose disc B' would bear over the springs B to bring any regulated pressure
over the diaphragms when actuated by a haud screw key B, but instead of springs,
weights may be substituted. A spindle C would pass through the centre of
diaphragms its upper end C' projecting a short distance up within the spring
coils B where a disc B³ would be secured on it by a collar and nut, while its
lower end C2 which may be screw-threaded would project down near to bottom of
valve casing A.

page_text: A hollow cylindrical brass bush or liner D would by these improvements be fitted
within the valve casing A between the bottom of diaphragm b and the lower end of
casing A and radial slits or openings D2 would be formed in it round the part where
the ported branches A' A' are formed in valve casing A. This bush would be.
formed with a screw thread D1 at its upper end as shown in Figures 1 and 3 to
screw into a corresponding screw threaded part of valve casing A, while the lower
end of bush would bevel at D³ and be secured within a central ring flange A' cast
or formed on casing A opposite the ports and the lower end D³ of this bush D would
form a seating for a centre piston or other valve E, or conversely as shown in
Figures 7 and 8 the screw thread D¹ may be formed at lower end and bevel valve
seat D3 at upper end of bush D. The piston valve would consist of a hollow
spindle E working over the centre spindle C of diaphragms and be held in position
by a crosshead or link nut e engaging with lower recessed part of spindle and having-
a centre screwed eye e¹ and jam nut e' working over the screwed part C of
spindle C. As shown in Figure 6 the edges of the link nut e are flattened and an
open annular space ex Figure 1 formed between lower end of hollow spindle E and
the lower solid part of link e for the pressure fluid to cater and pass up through the
hollow spindle E to act on the diaphragm plates 66". A piston E' is fitted on the
upper end of spindle E or a leather turned down washer screwed between collars in
the usual well known manner while a solid head piston E' or leather washer secured
between collars would be fitted at lower end of spindle C where a bevelled edge may
be formed on piston E2, and radial guide ribs may be formed round spindle, while
below this valve the casing A may be either close formed or have an opening fitted.
with a recessed screwed on cap AB, and a projecting lip E³ may be fitted on valve to
give an increased resistance and prevent clattering on seating D³, and when close
formed at bottom the hollow spindle C would be inverted and the securing link
nute e be screwed on at top.
The action of the valve is as follows:-
Steam or other fluid of high pressure on being admitted from a boiler or pipes
will pass freely through the valve, and be reduced on the delivery side to the
pressure desired. This is effected by the compression or tension on loading spring B
until the pressure in pipes on outlet side A2 is sufficient to overcome the tension of
loading spring B and the low or reduced pressure will be admitted from outlet side
of valve and pass through the annular space e* up the stem E, and operate below
the flexible diaphragms 6 and 6". The valve will thus gradually open or close-
with any slight rise or fall of pressure on the outlet side A².
By these improvements the inner liner or brass bush D with seating D³ is.
removeable, as also the working parts, so that the valve can be easily repaired when
these parts get worn out.
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 :-
First. The construction or arrangement and combination of the parts of fluid.
pressure reducing or regulating valves, substantially as herein described in reference
to and shown in the accompanying drawings.
Second. In fluid pressure reducing or regulating valves, the fitting and use
between diaphragm and lower part of main casing of a removeable screwed on
hollow cylindrical brass bush or liner formed with ports or openings and the end
part of which forms a seating for the valve, substantially as herein described in
reference to and shown in the accompanying drawings.
Dated the 7th day of October 1896.
W. R. M. THOMSON & Co.,
96 Buchanan Street, Glasgow, Agents.