Year: 1887

page_text: I HERBERT TROTT of 75 High Street Battersea in the County of Surrey, Engineer
do hereby declare the nature of this invention to be as follows:-
These improvements have reference to stop and other valves for regulating the flow
of fluids and bave for their object to render the same more efficient, durable and easily
renewable at the parts where the greatest wear takes effect, without the need of
employing specially skilled labour.
-
In the specifications of certain prior Letters Patent numbered and dated respectively:-
11727 August 28th 1884: 272, January 8th 1885, and 10125 August 26th 1885, I
have already described various arrangements of valves for the above named purpose
but the present invention relates to variations in the constructions therein described
and illustrated and particularly intended to fit the present forms of valves for higher
pressures, although in some respects retaining features of invention contained in the
recited specifications.
According to my present invention I form the valve with inlet and outlet passages a
dividing screen, having an opening through it which is controlled by a valve plate
which takes its seat around the opening. This valve is operated for opening or closing
by a stem or spindle provided with a handle for operation by a push or pulling or
turning movement or combination of such movements according as the packed spindle
is operated by screw or against the resistance of a spring, or is used for a stop, main
bib or other valve or for a ball or cistern arrangement for supply of liquid. The
spindle is connected to the valve plate either by screwing or by keyed socket on the
side thereof abutting on the seat and away from the flow, drawing the valve to its
seat and this by passing through the opening in the screen, or the valve is moved
by the spindle piston-wise pressing it off its seat against the pressure of a spring
working with the flow. The end of the spindle taking bearing on a socket or bed
connected to the valve and this may form the attachment for the rubber or beaded
surface.

page_text: The valve is inserted or removed examined or repaired and adjusted through an
opening on the inlet side of the screen communicating with a chamber covered by
a cap or cover secured by screwing or otherwise. The traverse of the valve is
controlled in its movement to or from its seat by arms or projections riding
along guide ways formed by or to the lower edges of the opening to this chamber
for access.
The valve may have its pressing and fluid excluding surface of india-rubber,
ebonite or other compound or composition of analogous elastic qualities, or of metal,
asbestos or other material suitable to bed on to the face of the seat of harder material,
or the seating may be the softer material and the valve the harder material.
The one
or the other part where they meet I form by preference as an encircling bead bedding
on a plain surface of the other part. Thus a beaded rubber seat pressed on by a flat
surfaced valve, or a beaded rubber valve pressing against a flat hard seat, or a hard
beaded valve on a soft rubber seat let into the screen face or equivalent arrangement.
A convenient method of securing the soft beaded rubber valve piece to the valve is
by means of the screw or key socket being held against the rubber and to the back
plate by a threaded stem passing into the back plate. The spindle end either screws
into this socket or engages in by key or otherwise so as to be able to pull it to its
face.
Where the valve is of metal the socket may be formed with it or attached to it.
To prevent or abate effects of concussion under high pressure, I, in some cases,
fasten into the inlet orifice a tube closed at inner end with openings laterally, preferably
angular in direction to rearward and with an inner deflecting annular part cylinder or
double cylinder partly extending rearward of the closed end. The incoming fluid
space or inlet is further contracted by the insertion of another tubular part of restricted
bore which delivers with the annular chamber formed by the part cylinder and thus a
devious course of flow is provided within the valve chamber for the liquid under high
pressure to relieve concussion.
Dated the 9th day of November 1887

page_text: of Fluids.
I HERBERT TROTT of 75 High Street, Battersea, in the County of Surrey,
Engineer, 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 :-
These improvements have reference to stop and other valves for regulating the
flow of fluids and have for their object to render the same more efficient, durable and
easily renewable at the parts where the greatest wear takes effect, without the need of
employing specially skilled labour.
In the specifications of certain prior Letters Patent Nod and dated respectively:-
11727 August 28th 1884: 272 January 8th 1885 and, 10125 August 26th 1885
I have already described various arrangements of valves for the above named purpose
but the present invention relates to variations in the constructions therein described
and illustrated and particularly intended to fit the present forms of valves for
higher pressures, although in some respects retaining features of invention
contained in the recited specifications.
This invention relates to valves and has for its object to provide a valve by which
the flow of water or other fluid may be regulated and controlled in its passage
through or from channels of supply without leakage, my improved valve being
simple in construction and effective in its operation, its parts on which the greatest
stress of wear comes being accessible for examination and renewal with greater
facility than has been heretofore possible and the portion of the valve which seals the
opening for outflow can be renewed without skilled labour in a very short space of
time and at an expense quite inconsiderable.
In accordance with my invention I form a circular seating preferably projecting
around the exit opening of the channel or passage through which the fluid is to flow
and whose flow the valve is to control and a valve piece is slung from above this
opening on projections therefrom, which projections hang each on a ledge one at
either of the opposite sides of a chamber formed in front of the supply pipe, the said
valve piece being operable, by wedge motion or other common device for developing
motion and power in closing valves, to move away from the outlet seating to permit
flow and to press closely thereon to prevent flow.
Said chamber has a removable lid or cover through which the valve piece can be
lifted out, another opening for supporting the valve operating device in use and
another opening for exit of fluid from the valve chamber.
The valve piece in addition to being provided with means of slinging has attached
to its face next the opening to be sealed a removable plate or pad of india rubber or
other material adapted to cooperate with the seat to make a tight joint effective against
passage of water, steam, gas or other fluid for the control of whose passage it is

page_text: Figure 1 is a transverse central section of the valve adapted for a screw adjustment.
Figure 2 is a side or exterior view of the parts shown in section Fig. 1.
Figure 3 is a section of the chamber rearward of the valve piece taken at right
angles to Fig. 1, cap removed.
Figure 4 is a detail edge view of the valve piece separately and
Figure 5 is a rear view or view of the side opposite to the closing faces of the
valve piece e Fig. 4.
The shell or case of the valve b the screw b¹, or other means of attachment for
the valve case to the pipe to be closed, the screw rod or lever to actuate the valve
piece and the spout or exit for the fluid shewn in Figs. 1 and 2 may be shaped in
any suitable or usual manner, adapted to the particular use to which the valve is
designed to be put, that shown being the most convenient for a screw stop cock for
ordinary water supply purposes.
a is the inlet, 6 the case, a¹ the seating for the valve f. c a screw cap closing the
opening at the top of the interior of the case 6 which opening is also formed with a
screw thread adapted to engage said screw cap. d is a spindle or stem rotateable in
the packed bearing h, the packing ¹ of which can be tightened up by turning the
screw nut ². This spindle d is rotated by the capstan handle d¹ and its other end d²
being formed with the thread taking into a corresponding thread 2 formed in the
case the spindle is traversed to or from the valve seat a¹. e is the valve piece which
is hung by horns or projections el e¹, one from each side, resting on a ledge i i formed
in the inner wall of the case b. e is a small knob provided to facilitate grasp of the
valve piece e but is not in any way an essential as the piece itself can be taken
hold of.
On the back of valve piece e or at the opposite side to the seating a¹ is a slotted
undercut projection e³ which engages a knob or enlargement d³ and embraces the
neck d² connecting said knob to the stem d a prolongation of which said knob and
neck form, and consequently any horizontal motion given to the stem d will be
imparted to the valve piece e, which piece will slide along on its supports e¹, drawn or
pushed by the stem d²
The position of the valve in use whether upright as in the drawing Figures 1 and 2
or turned in any position to suit peculiarities of situation is not material to its correct
working.
The position of the spout or exit shewn in the drawing as beneath the valve piece e

page_text: may be altered to suit circumstances of situation for use and so as to deliver in any
other convenient direction, or the exit g may be part a pipe connecting the channel a,
it being immaterial to my invention at what angle to the axis of channel a the face of
the seat a' is arranged, so long as the meeting face of the valve piece e is maintained
parallel thereto by arranging the stem d or the equivalent motive part to operate said
valve piece on its arms e in a direction at right angles to the plane of the face of the
seating a¹, provided also that the opening in the case closed by the cap c is
correspondingly arranged to admit of removal of the valve piece e.
I have found the removable pad f to be most conveniently attached to the piece e
by means of a screw passed through the pad finto a threaded hole in piece e the
enlarged head of the screw or screw and washer holding the two pieces together aided
by the projecting annular wall et from the piece e.
The material of which this renewable pad can be composed will depend on the
nature of the fluid and its destructive properties and will be varied accordingly as
will also the material of other of the parts but for ordinary water, steam and other
uses the pad may be made very wear resistent when composed of mixture of india
rubber and asbestos or other similarly known compositions, of metal or of
alloys or other material adapted to give in contact with the seating a fluid tight
joint.
In practice I find it more convenient to place the slotted holder e on the back of
the valve piece e and the knob d³ on the operative part but this can be reversed the
arrangement shewn by the detail Fig. 6 shewing the knob and stem on the valve
piece and the slotted holder e³ attached to the stem d by a projection e³ from the
slotted holder e³ passing into the end of that stem d and being held therein with
capability of rotation by a cross pin d* passed through the stem d into a neck e in
the projection es
If desired the screw rotatory stem d may be substituted by a lever, push piece with
spring or any other ordinary and suitable device for conveying motion to the valve
piece such means of operating separately considered forming no part of my
invention.
Figure 7 shews a section, corresponding to Fig. 1, of a modification of the latter
figure in that the valve piece e closes with the flow instead of as in Fig. 1 against the
flow of fluid and the movement of the valve piece e is effected by a rod d connected
to the face of valve e actuated by pressure on a push piece d'. de is a spring coiled in
the chamber d³ abutting against the washer d and pressing against the enlargement d³
applied on the rod d so as to press against the larger diameter thereof next the push
piece.
The rod d or its equivalent may however be connected detachably to the valve
piece e as is the rod d to the back of e in Fig. 1.
Figures 8 and 9 shew flat faced valve pieces acting against raised metal seatings
in place of the beaded rubbers of Figs. 7 and 11.
To prevent or diminish effects of concussion under high pressure I, in some cases,
fasten into the inlet orifice a tube closed at inner end with openings laterally,
preferably angular in direction to rearward and with an inner deflecting annular part
cylinder or double cylinder partly extending rearward of the closed end. The incoming
fluid space or inlet is further contracted by the insertion of another tubular part of
restricted bore which delivers within the annular chamber formed by the part cylinder
and thus a devious course of flow is provided within the valve chamber for the liquid
under high pressure to relieve concussion.
In Figures 10 and 11 this device for reducing concussion is shown applied respec-
tively to the inlets of the valves Figs. 1 and 7, m being the tube closed at its inner
end m¹ with openings m³ raked rearwardly with an inner part cylinder m² extending
rearward of and from the closed end m. m is another tubular part of restricted
area or bore which delivers within the annular chamber formed by the part
cylinder m².
The part cylinder m², or the tubular part m² or both of same, or the whole device
contained within the tube m may be dispensed with if so desired.

page_text: 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. In a valve, a shell, or case 6 having a seated fluid inlet a, a fluid outlet g, guide
ways i and plugged opening c in said case b, a valve piece, composed of a removable
face pad fa body e, arms e¹ and connector e³ combined with means for actuating said
valve piece substantially as and for the purpose specified.
2. In a valve, a shell b, a seated inlet a¹, guide ways i, a plugged opening e in said
case having a swing valve piece e, f, and an operating arm suitably supported
substantially as and for the purposes specified.
3. In a valve, a chamber having a fluid inlet opening and a fluid outlet opening, and
a plugged opening c combined with a valve piece traversing in guideways in said
chamber substantially as and for the purpose set forth.
4. The combination with a valve chamber, provided with guideways i, of a sliding
valve piece e having a removable face piece f, and means of connection to an operating
device as set forth.
5. A valve closing piece e having removable face plate and connecting attach-
ment and supports e in combination with a valve shell substantially as and for the
purpose set forth.
6. The various combinations or arrangements and use of parts of valves for
regulating the flow of fluids substantially as shown and de
dosonihad
'
WM. BROOKES & SON,
55 & 56, Chancery Lane, London,
Agents for the Applicant.
Dated the 27th day of July 1888.
WM. BROOKES & SON,
55 & 56, Chancery Lane, London,
Agents for the Applicant.