Improvements in Valves for Steam, Air, Water, or other Fluids.
Year: 1897

page_text: Date of Application, 12th May, 1897
Complete Specification Left. 5th Feb., 1898-Accepted. 26th Mar. 1898
PROVISIONAL SPECIFICATION.
Improvements in Valves for Steam, Air, Water, or other Fluids.
We, HERBERT LINDLEY, of Sandon Works, Patricroft, Engineer, and FREDERICK
CHARLES CARTER, of Atlas Works, Stalybridge, Engineer, both in the County of
Lancaster, do hereby declare the nature of this invention to be as follows:-
This invention relates to that type of valves known as stop valves for steam,
air, water or other fluids, and as fullway valves and such as are fitted with a
sliding valve which can be withdrawn entirely to one side of the opening in the
valve box so as to offer a free passage for the fluid of the full diameter or vore
of the branches on the valve box or of the pipe of which they are a continuation.
The object of this invention is to construct the said sliding valve so that it shall
slide as freely and fairly on its seat and as parallel thereto as possible, so that
wear may take place as uniformly as possible on the surfaces in contact of the slide
and the seat and therefore the sliding valve and its seat shall remain steamtight
for a greater period of time than obtainable in such valves as heretofore constructed.
The invention is applicable equally to straight through or angle valve boxes
and for the purpose or describing this invention we will refer to the right angle
form, which may be constructed as follows:-
The valve box consists of a chamber of suitable form in which may freely move
the sliding valve hereinafter called slide, which consists of a circular disc of metal,
space being allowed in the chamber for the slide to move a sufficient distance
to entirely cover or uncover an opening at or towards one end of the chamber.
This opening is a prolongation of the exit or delivery branch of the valve and is
usually of circular cross section and of a size equal to that of the pipe to which
the valve is to be attached and at which the valve is rated. The orifice of this
opening or branch in the valve box or chamber is fitted with a seat, i.e. an annulus
or ring of metal driven or otherwise fixed steam-tight into a bored recess in the
walls thereof, and with its face, against which the slide is to work, standing from,
i.e. beyond the face or wall of the valve box, so that the slide in sliding on or against
the face of the seat may be quite clear of the surface of the valve chamber.
When the slide is fully on its seat and the orifice of the exit branch is thereby
closed the steam pressure seryes to keep the said slide firmly pressed on the waid
seat, steam being admitted to the valve box or chamber by a second branch in con-
nection therewith. On withdrawing or moving the slide on its seat so as to admit
steam from the valve box to the outlet branch, the pressure of steam on the slide
becomes equal or nearly equal on each side of same and it therefore becomes
balanced and the object of this invention is to provide an elastic pressure to keep
the slide in contact with its seat and at the same time to keep it as nearly parallel
thereto as possible at all parts of its travel, so that wear may take place as uniformly
as possible on the surface in contact with the seat as hereinbefore described.
To this end therefore we provide on the back of the slide, i.e. the face away
from the seat, a central cylindrical peg on which fits a bored bush or tube, such
bush being provided with an elongated rectangular piece at right angles to same,

page_text: and forming a sliding guide. This guide is so made as to slide in a groove in a
second elongated rectangular guide which is also fitted at its centre with a cylin-
drical peg fitting into a hole in one side of the valve box co-axial with and opposite
to the outlet or delivery branch previously referred to. The side of the valve
box containing the hole for this peg is made loose, i.e. in the form of a cover, to
facilitate putting the parts together.
It will be seen therefore that, as the slide is moved backwards and forwards
on its seat and covers or uncovers the orifice or hole in the same, it is guided so
as to move centrally by means of the guiding pieces on its back, though free to
turn round on its cylindrical peg if from any cause the friction on one side of the
slide should be more than on the other and thus a fine face is ultimately produced
parts pressed together, and towards the seat.
In order to keep the slide constantly pressed against the seat a compression
spring is provided round the central peg of the back guide thus keeping all the
parts pressed together, and towards the seat.
The length of the back guide, whose central peg is confined in the hole in the
side of the valve box co-axial with the outlet branch, is such that when the slide
is withdrawn a sufficient amount, limited by à stop, to entirely uncover the hole
or orifice in the seat, there is still a sufficient portion of the guide on the bush on
the peg of the slide remainin in the back or fixed guide, so that when the slide is
again moved over the orifice of the seat it is thereby centrally guided so as to
fairly cover same. The length of the guide on the bush that moves with the
slide is about the same as the diameter of the circular slide so that when the
slide is fully withdrawn so as to entirely uncover the orifice in the seat, the pressure
of the back guide due to its spring is exerted at a point as nearly as possible in
a line normal with the surface of the slide and seat remaining in contact, for it
must be understood that on opening the valve the slide is only withdrawn or moved
a sufficient amount to just allow a clear passage through the orifice in the seat
and there is thus a portion of the seat equal to its breadth that is never uncovered
by the slide.
The slide is moved backwards and forwards by means of a spindle passing
through a stuffing box in the valve box and provided with a screw and hand wheel
in a manner now generally understood.
In straight-through valves, i.e, where both inlet and outlet branches are in line,
the cover aforesaid containing the hole in which fits the peg on the back guiding.
piece, is replaced by a branch bolted on, space being left round the guiding pieces
for steam to pass without throttling, the said branch being constructed with a bar
which can be drilled to afford a bearing for the neg of the back guide, or same
may be cast in one with the valve box.
Improvements in Valves for Steam, Air, Water, or other Fluids.
We, HERBERT LINDLEY, of Sandon Works, Patricroft, Engineer, and FREDERICK
CHARLES CARTER, of Atlas Works, Stalybridge, Engineer, both in the County of
Lancaster, 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:-
...
kinataldram
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page_text: air, water or other fluids, and as fullway valves and such as are fitted with a
sliding valve which can be withdrawn entirely to one side of the opening in the
valve box, so as to offer a free passage for the fluid of the full diameter or bore
of the branches on the valve box or of the pipe of which they are a continuation.
The object of this invention is to construct the said sliding valve so that it shall
slide as freely and fairly on its seat and as parallel thereto as possible, so that
wear may take place, as uniformly as possible on the surfaces in contact of the slide
and the seat and therefore the sliding valve and its seat shall remain steamfight
for a greater period of time than obtainable in such valves as heretofore constructed.
The invention is applicable equally to straight through or angle valve boxes
and for the purpose of describing this invention we will refer to the right angle
form, which may be constructed as follows:-
The valve box consists of a chamber of suitable form in which may freely move
the sliding valve hereinafter called slide, which consists of a circular disc of metal,
space being allowed in the chamber for the slide to move a sufficient distance
to entirely cover or uncover an opening at or towards one end of the chamber.
This opening is a prolongation of the exit or delivery branch of the valve and is
usually of circular cross section and of a size equal to that of the pipe to which
the valve is to be attached and at which the valve is rated. The orifice of this
opening or branch in the valve box or chamber is fitted with a seat, i.e. an annulus
or ring of metal driven or otherwise fixed steam-tight into a bored recess in the
walls thereof, and with its face, against which the slide is to work, standing from,
i.e. beyond the face or wall of the valve box, so that the slide in sliding on or against
the face of the seat may be quite clear of the surface of the valve chamber.
When the slide is fully on its seat and the orifice of the exit branch is thereby
closed the steam pressure serves to keep the said slidé firmly pressed on the said
rest, steam being admitted to the valve box or chamber by a second branch in con-
nection therewith. On withdrawing or moving the slide on its seat so as to admit
steam from the valve box to the outlet branch, the pressure of steam on the slide
becomes equal or nearly equal on each side of the same and it therefore becomes
balanced and the object of this invention is to provide an elastic pressure to keep
the slide in contact with its seat and at the same time keep it as nearly parallel
thereto as possible at all parts of its travel, so that wear may take place as uniformly
as possible on the surface in contact with the seat as herein before described.
To this end therefore we provide on the back of the slide, i.e. the face away
from the seat, a central cylindrical peg on which fits a bored bush or tube, such
bush being provided with an elongated rectangular piece at right angles to same,
and forming a sliding. guide. This guide is so made as to slide in a groove in a
second elongated rectangular guide which is also fitted at its centre with a cylin-
drical peg fitting into a hole in one side of the valve box co-axial with and opposite
to the outlet or delivery branch previously referred to. The side of the valve
box containing the hole for this peg is made loose, i.e. in the form of a cover, to
facilitate putting the parts together.
It will be seen therefore that, as the slide is moved backwards and forwards
on its seat and covers or uncovers the orifice or hole in same, it is guided so
as to move centrally by means of the guiding pieces on its back, though free to
turn round on its cylindrical peg if from any cause the friction on one side of the
slide should be more than on the other and thus a fine face is ultimately produced
both on the slide and on its seat.
In order to keep the slide constantly pressed against the seat a compression
spring is provided round the central peg of the back guide thus keeping all the
parts pressed together and towards the seat.
The length of the back guide, whose central peg is confined in the hole in the
side of the valve box co-axial with the outlet branch, is. such that when the slide
is withdrawn a sufficient amount, limited by a stop, to entirely uncover the hole
or orifice in the seat, there is still a sufficient portion of the guide on the bush on
peg of the slide remaining in the back or fixed guide, so that when the slide is
the

page_text: again moved over the orifice of the seat it is thereby centrally guided so as to
fairly cover same. The length of the guide on the bush that moves with the
slide is about the same as the diameter of the circular slide so that when the
slide is fully withdrawn so as to entirely uncover the orifice in seat, the pressure
of the back guide due to its spring is exerted at a point as nearly as possible in
a line normal with the surface of the slide and seat remaining in contact, for it
must be understood that on opening the valve the slide is only withdrawn or moved
a sufficient amount to just allow a clear passage through- the orifice in the seat
and there is thus a portion of the seat equal to its breadth that is never uncovered
by the slide.
The slide is moved backwards and forwards by means of a spindle passing
through a stuffing box in the valve box and provided at its outer end with a screw
and hand wheel in a manner now generally understood, and at its end in the valve
box with a sleeve embracing the bush on the guide piece moving with the slide.
In straight-through valves, i.e., where both inlet and outlet oranches are in line,
the cover aforesaid containing the hole in which fits the peg on the back guiding
piecè, is replaced by a branch cast or bolted on, space being left round the guiding
pieces for steam to pass without throttling, the said branch being constructed with a
bar which can be drilled to afford a bearing for the peg of the back guide, or same
may be cast in one with the valve box.
And in order that our invention may be more fully understood we have caused
to be appended hereunto two sheets of drawings marked with letters of reference
indicating like parts in the various figures.
Figs. 1 & 2, Sheet I, represent a right angled or junction valve, and Figs. 1 & 2,
Sheet II, represent a straight. way valve.
In Figs. 1 & 2, Sheet I, A represents the chamber or box of a right angle valve
provided with inlet branch B and outlet branch C and of suitable form to allow
of the necessary travel of the sliding valve D. The outlet branch C is provided
at its orifice in the chamber A with a seat E the inner face of which stands slightly
beyond the face of the body or wall of the box A and is also machined to a true
flat face so that when the sliding valve D hereinafter called the "slide valve "
which also has a true flat face towards the seat E, covers the orifice in branch C
the joint between the two surfaces is said to be steam tight, that is no steam or air,
water or other fluid can pass from the box A into the branch C. On the inner
face of the sliding valve D is a peg F, on which fits loosely a bush or hollow bearing
formed on a piece or slide G. The face of this slide G away from the bush fitting
peg F, is of rectangular form, elongated in the direction in which the sliding
valve D is required to travel in order to cover and uncover the orifice of the branch C
and is constructed either with a groove or recess or feather or in
any other
suitable way so as to engage with a corresponding feather or recess in another
piece H which forms a guide for the said slide G. The guide piece H is also
constructed with a peg loosely fitting in a hole formed in a boss on the cover I
This cover can be removed for the purpose of fitting the parts together or for
reseating or adjusting the face of the seat E. When the slide valve D fully covers
the orifice or seat E, the peg on same is in a line with the peg on the guide H and
both could turn round together, which is prevented by a claw piece J formed on
the sleeve O, see Fig. 1, attached to the spindle K, as shown in the drawings, or
in some other convenient manner. When the slide valve D is withdrawn by
means of spindle K the pieces G & H can no longer turn round or rotate on their
bearings, the slide valve D can however still rotate and does so during its travel if
from any cause the friction between itself and its seat E is greater on one side
than on the other. The spindle K which serves to move the slide valve D passes
through a stuffing box in chamber A and is fitted with a screw and handwheel
outside in a manner now well understood, or a rack and pinion or lever may be
employed to cause the spindle K to travel in and out and so operate the slide valve D
The inner end of the spindle K is provided with a sleeve O embracing the bush or

page_text: hollow bearing on the slide G. Of course if desired, the solid peg could be on the
slide G and the hollow bearing or bush on D.
In order to keep the slide valve D constantly pressed against the seat E a
spring L is provided between guide piece H and the cover I. The result of placing
the spring in this position is that when the slide valve D is fully withdrawn,
entirely uncovering the orifice in C, but still in contact with the seat E, the pressure
exerted by the spring through the guide H is applied at the extremity of the
slide G which is of the same diameter or thereabouts as the slide valve D, so that
its extremity is therefore practically in a line with the edge of the slide valve D
and therefore the said pressure is normal or nearly so to the surface in contact of the
slide valve and seat E. The said valve D therefore when commencing its travel
to cover orifice or seat E has its working face on G kept practically parallel with
the face of the seat E from the commencement of its travel, a result which would
not be secured were a spring placed between pieces D & G. The result of this
arrangement is to preserve a true face on E after long periods of use.
In Figs. 1 & 2, Sheet II, is shown a straightway valve. In this arrangement
the inlet branch B is formed on the casing A, in place of the cover I in Sheet I,
a bar M is formed in this branch, containing a boss for the peg of the guide
piece H. Sufficient area is allowed round the said bar to allow of the passage
of fluid without any increase of velocity beyond what is obtained in the branches
B & C.
A cover N is provided at the end of the casing A as shown for the purpose of
inserting, removing or inspecting the parts E, D, H & G, etc.
. Having now particularly described and ascertained the nature of our said in-
vention, and in what manner the same is to be performed, we declare that what we
claim is:
—
1st. In a stop valve having an orifice covered and uncovered by a slide valve
moving in a rectilinear path, providing such slide valve with a slide which engages
with a guide, adapted to secure the correct rectilinear travel of the said slide valve
and to permit same to rotate during its travel and also to move towards its seat
so as to take up wear, all substantially as set forth.
2nd. In a stop valve of the type herein before described having a slide valve
with slide and guide as specified in the preceding claim, a spring fitted to the
said guide which serves to keep the parts pressed together and thereby the sliding
valve in contact with its seat during its travel, in the manner as and for the
purpose herein before set forth.
3rd. A right angle stop valve or junction valve constructed in accordance with
and operating substantially as hereinbefore described with reference to Figs. 1 & 2,
Sheet 1, of the drawings annexed or any mere modification thereof.
4th. A straightway stop valve constructed in accordance with and operating
substantially as herein before described with reference to Figs. 1 & 2, Sheet II, of
the drawings annexed or any mere modification thereof.
Dated this 4th day of February 1898.