Improvements in and relating to Stop or Regulating Steam or other Pressure Fluid Valves.
Year: 1892

page_text: Date of Application, 24th Nov., 1892
Complete Specification Left, 6th June, 1893-Accepted, 8th July, 1893
PROVISIONAL SPECIFICATION.
Improvements in and relating to Stop or Regulating Steam or other
Pressure Fluid Valves.
I, JAMES PEACOCK, of 5 Wilton Gardens, Glasgow, Lanarkshire, Engineer, do
hereby declare the nature of my invention to be as follows:-
This invention has reference to and consists of a new or improved construction of
single disc valve or valves and valve chest, suitable for an inlet and shut down or
regulating steam valve for steam engines, an other purposes; suitable also for
other fluid pressure engines or purposes; the spindles of the valves being capable
of being worked either by screws and hand wheels or by levers, with the power of
being made nearly equilibrium in action and giving greater facility for the
actuating of large main valves, over the valves heretofore in use.
The nature and novelty of the invention, or the construction of the valves and
valve chest, according to one arrangement, consist as follows, of a cylindrical
valve chest say with a lateral inlet branch and a vertical outlet branch, the former
leading from the main steam pipe, and the latter to the steam engine for actuating
it or other purpose for which the steam is to be used. In a horizontal plane with
the inlet branch an enlarged annular port and chamber is formed round the chest
above the inserted annular seat of the disc valve proper, and this upper part or
chamber of the valve chest is bored cylindrical right up, about the diameter of the
seat, so that the disc valve is fitted in through the top of the chest, and has its
lower annular bearing surface closing on the angled or flat bearing surface of the
seat, while beyond the lifting disc valve face a web piston is formed and turned on
it to fit loosely the bored out top part of the chest, covering the port leading
This piston
into the annular space before mentioned formed all round in the chest.
part may preferably be formed with arms to strengthen it to the centre boss formed
above the centre of the dished up disc part of the valve and formed with a recess
for the enlarged head of the spindle lifting the valve by. This upper bored chest
part would be fitted with a cover and stuffing box for the valve spindle to work up
through and be actuated in any ordinary manner by a lever or by a hand wheel
and screw fitted in a standard bracket over the closing cover. This upper bored
chamber would have a lateral branch leading from it to a small circular supple-
mentary pressure relief valve and seat chamber with rod also working upwards
through a bored stuffing box cover, so that its rod would be worked outside by a
lever or screw arrangement. The port under this small valve might either lead
into the steam branch leading to the engine, direct, or be conveyed to the inlet port
or chamber of the intermediate or lower pressure cylinder of the engine or other
chamber, so as to give an immediate relief of pressure from the bored chamber
above the said main disc and piston valve. And a small hole would be formed
through the piston web from the initial steam pipe or annular chamber round the
piston valve so that when this main valve was shut the initial pressure of steam
would pass through this hole and the small annular loose space round the piston
and thus keep the main valve shut when the small supplementary valve was closed.
The action of opening the valve would be as follows; the small valve would be
first opened to suddenly relieve the pressure above the large valve and adinit it
below when the pressure of steam acting under the piston valve above the seat
would tend to raise the main closing disc valve with the whole pressure of the high
pressure steam acting on the area beyond the bearing surface of the valve, thus
making it an almost equilibrium valve, so that the lever on the valve rod or screw
wheel outside would easily raise the valve and admit the steam under the piston
part of the valve and so regulate the amount of steam to be admitted to the engine

page_text: or service branch, when the closing of the small relief pressure valve would
immediately allow the full pressure of steam to enter the chamber above the valve,
the valve in this position being in equilibrium would be easily moved to regulate
the amount of admission of steam, or actuated to close the valve as aforestated
with the full pressure of steam above it.
In some cases the small relief valve might be fitted on the lower end of the valve
rod itself and work on a seat bored through the disc valve so that when the valve
rod was raised a slight distance for the purpose of opening the main valve, it would
allow the steam to escape from the chamber above to the engine branch below it
and thus relieve the pressure above the main valve and allow the initial pressure
steam to pass under and raise the main valve with the assistance of the hand gear
of the spindle outside as in the former arrangement and enable it also easily to
regulate the admission of the high pressure steam or close the valve against this
pressure, at the same time closing the small escape valve when the
pressure
again rise in the chamber above the main valve and maintain its tightness on the
closing seat.
Dated the 23rd November 1892.
would
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.
COMPLETE SPECIFICATION.
Improvements in and relating to Stop or Regulating Steam or other
Pressure Fluid Valves.
I, JAMES PEACOCK, of 5 Wilton Gardens, Glasgow, Lanarkshire, 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 and consists of a new or improved construction
of single disc valve or valves and valve chest, suitable for an inlet and shut down
or regulating steam valve for steam engines, and other purposes; applicable also
for other fluid pressure engines or purposes; the spindles of the valves being
capable of being worked either by screws and hand wheels or by levers, with the
power of being made nearly equilibrium in action and giving greater facility for
the actuating of large main valves, over the valves heretofore in use.
And in order that my said invention and the manner of performing or carrying
the same into effect or practice may be properly understood, I have hereunto
appended an explanatory sheet of drawings, in which the same reference letters
are used to indicate corresponding parts in all the figures where shown.
Figures 1 and 2 are a sectional elevation and sectional plan view of one con-
struction of my improved regulating stop valve, Figure 2 being taken half on the
line 1-1 and half on the line 2-2, of Figure 1, with the valve removed.
Figure 3 is a sectional elevation, and Figure 4 a horizontal section taken half on
the line 3-3 and half on the line 4-4 of Figure 3, of another arrangement of my
improved valve, slightly modified from that shown in Figures 1 and 2.
Figure 5 is a sectional elevation, and Figure 6 a corresponding sectional plan of
a fluid pressure regulating stop valve as constructed in accordance with another
arrangement of my improvements.
Referring to Figures 1 and 2 of these drawings:-In this arrangement a
cylindrical valve chest A', A', is formed with a lateral inlet branch A, and a
vertical outlet branch B the former leading from the main steam pipe, and the
latter to the steam engine for actuating it or other purposes for which the steam is
to be used. In a horizontal plane with the inlet branch A an enlarged annular
port A and chamber A is formed round the chest A³ above the working face of
the inserted annular seat 6 of the disc valve b proper, and an upper part or

page_text: chamber A³ of the valve chest A¹ is bored cylindrical right up, larger than the
outer diameter of the seat 6' separated from the annular space A" and preferably
formed of a lining in one with the seat part b¹ so that the disc valve b is fitted in
through the top of the chest A', and has its lower annular bearing surface closing
on the angled or flat bearing surface of the seat b', while beyond the lifting disc
valve face b a hollow web or annular piston 62 is formed and turned on it rather
smaller in diameter than the bored chamber A³ to fit loosely the bored out cylin-
drical chamber part A³ of the chest A', covering the port A leading into the
annular space A" before mentioned, formed all round in the chest A¹. This piston
part 62 may preferably be formed with arms to strengthen it to the centre boss, 6"
formed above the centre of the dished up disc part 6 of the valve and formed with
a recess for the enlarged head c¹ of the spindle c lifting the valve by. This
upper bored chest part A³ is fitted with a cover A4 and stuffing box c for the
valve spindle c to work up through and be actuated in any ordinary manner such
as by a screw 2 and hand wheel c³, the screw nut being fitted in a standard
bracket A, over the closing cover A*. This upper bored chamber A³, has a
lateral branch a', leading from it to a small circular supplementary pressure relief
valve a and seat chamber a" with rod a² also working upwards through a bored
stuffing box cover a³, so that its rod a' may be worked outside by a screw at and
hand wheel. The port seat all under this small valve a may lead by a branch a¹¹¹
into the steam branch B leading to the engine, direct, or be conveyed to the inlet port
or chamber of the intermediate or lower pressure cylinder of the engine or other
chamber as dotted in at all so as to give an immediate relief of pressure from the
bored chamber A³, above the said main disc and piston valve b, 62. And small holes 6³,
would be formed through the piston web 62 from the initial steam pipe A or annular
chamber A round the piston valve b, 63, so that when this main valve was shut the
initial pressure of steam would pass through these holes and the small annular loose
space round the piston 62, up into the chamber A3 and thus keep the main valve b shut
when the small supplementary valve a was closed. The action of opening the valve b,
would be as follows; the small valve a would be first opened to suddenly relieve
the pressure in the chamber A³, above the large valve b and admit the steam below,
when the pressure of steam acting under the piston valve b, together with the
pressure of the initial steam acting on the annular face formed between the outside
edge of the seat b', and the outside of piston 62, would tend to raise this main
closing disc valve b, thus making it an almost equilibrium valve, so that the screw
wheel c³ outside on the valve rod c would easily raise the valve b and admit the
steam under the piston part of this valve and so regulate the amount of steam to
be admitted to the engine or service branch. While the closing of the small
relief pressure valve a would allow the full pressure of steam to enter the chamber A³
above the valve b, through the holes 6 and space between the piston b and
chamber A³; and the valve in this position being in equilibrium would be easily
moved to regulate the amount of admission of steam, or be closed on its seat b¹ as
aforestated, with the full pressure of steam above it.
The arrangement shown in Figures 3 and 4 is constructed substantially in the
same manner as that shown in Figures 1 and 2 and lettered to correspond, except
that the small relief valve a and its seat opening all lead direct into the branch B,
which in this case is shown as a lateral branch on the opposite side to the inlet A;
and the valve spindles c and a² are shown as actuated by levers dotted in at co
and a mounted on horizontal spindles on a fulcrum bracket A projecting up from
the cover A', instead of by screws and hand wheels as in Figure 1.
Referring to Figures 5 and 6, in this arrangement the small relief valve a is
fitted on the lower head end c¹ of the valve rod c itself and works on the seat all
bored through the disc valve b so that when the valve rod c was raised a slight
distance for the purpose of opening the main valve b, it would allow the steam to
escape from the chamber A³ above to the branch B below it and thus relieve the
pressure above the main valve b, and allow the initial pressure steam to pass under
and assist in raising the main valve b with the assistance of the hand gear of the

page_text: spindle outside as in the former arrangements and enable it also to easily regulate
the admission of the high pressure steam or close the valve 6 on its face b¹ against
this pressure, at the same time closing the small escape valve a when the pressure
would again rise in the chamber A³, above the main valve b, and maintain its
tightness on its closing seat b¹.
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 stop and regulating valves for the more easy opening and perfectly closing
of said valves, substantially as herein described in reference to and shown in the
accompanying drawings.
Second. In fluid pressure stop and regulating valves, the fitting and use of a
pressure and relief piston chamber above the main valve with separate relief
pressure valve in connection therewith, substantially as herein described in reference
to and shown in the accompanying drawings.
Third. In fluid pressure stop valves the forming of a relief piston chamber above
the main valve, with either a lateral escape branch and valve, or a relief valve on
the spindle of the main valve itself, substantially as herein described in reference
to and shown in the accompanying drawings.
Dated 5th June 1893.
W. R. M. THOMSON & Co.,'
96, Buchanan Street, Glasgow, Agents.