An Improved Air Inlet Valve for Sewers, House Drains, and the like.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
An Improved Air Inlet Valve for Sewers, House Drains, and the like.
I, FREDERICK CHARLES KEENE, of "Ardenville," Wimborne Road, Winton,
in the County of Hants, Buildings Surveyor, do hereby declare the nature of this
invention to be as follows:-
The above invention consists of a moulded disc of glazed stoneware, or other
material, fitted with a flap or valve, and with or without composition joint, and is
intended to be used in conjunction with drain or sewer pipes of glazed stoneware,
or other material, and of any size, for the admission of air to manholes, chambers or
drains, and to prevent the escape of sewer gas or smells from same caused by back
draught or reverse currents of air, or otherwise.
These valves can also be made square, round, or oblong.
An improved Air Inlet Valve for Sewers, House Drains, and the like
I, FREDERICK CHARLES KEENE, of "Ardenville," Wimborne Road, Winton,
Bournemouth, in the County of Hants, Buildings Surveyor, do hereby declare
the nature of this invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:-
My invention relates to improvements in that type of valve used for admitting air
to sewers, house drains, and for analogous purposes where light rigid valves are
required, so sensitive that they open with the slightest appreciable incurrent, or
draw, in a drain, conduit, or pipe, and immediately close against back or reverse
currents, or draughts, and effectually prevent the escape of any back, or reverse
currents, sewer gases, or smells, through the conduit, or pipe from the sewer or
drain The valve-leaf and its seat according to my invention can be fitted to a
conduit or pipe without any separate casing or valve box.
I attain these objects by my improved air inlet valve, which under my invention
consists of a frame or disc of glazed stoneware, or other material provided with
a valve seat, and fitted with a flap or valve-leaf formed of suitable material, and
intended to be used as hereafter described in conjunction with drain, or sewer
pipes of glazed stoneware, or other material, and of any size, for the admission of
air to manholes, chambers, or drains, and to prevent the escape of sewer gas, or
smells from drains, or sewers caused by back draught, or reverse currents of air, or
otherwise.

page_text: I will now describe my invention more fully and with reference to the accompany-
ing drawings, and to the letters of reference marked thereon, the same or corre-
sponding parts being indicated by like letters throughout the several figures of the
drawings.
DESCRIPTION OF THE DRAWINGS.
Figure 1 illustrates a front view of the frame, valve seat, and valve-leaf.
Figure 2, shows a section of the frame, valve seat, and valve-leaf taken through
the line xx Figure 1.
Figures 3 & 3 show the valve-leaf removed from its seat.
Figure 4, shows the location of the frame, valve-seat, and valve-leaf in the
socket of a pipe.
Figure 5, shows examples of the frame, valve seat, and valve-leaf in two
positions, either of which may be used as desired, applied to admit air to a house
drain.
Figure 6, shows another example of the application of the frame, valve seat,
and valve-leaf applied to admit air to a house drain.
Figure 7, shows two examples of the application of the frame, valve seat, and
valve-leaf built into the brickwork of a sewer, manhole, or chamber.
Figures 8 & 9 show the frame valve seat, and valve leaf in a square form.
Under my invention the air inlet valve consists of a frame, or disc, provided
with a valve seat, preferably made of moulded glazed stoneware and of a size to
fit into and be held by the socket of an ordinary earthenware pipe, such as a drain
pipe, in which it can be set by a cement, or what is known as a Stanford joint.
The frame or disc has a centre opening or way, and a groove in which a flap or
valve-leaf formed of suitable material is supported.
The valve consists of a flap, or leaf, preferably made of aluminium, and corru-
gated, and provided with projections or arms by which it can be hung or supported
in the groove on the earthenware frame or disc, and be free to vibrate on the valve
seat. The frame and valve seat and valve-leaf are made of size adapted to fit,
and be set in the socket of an ordinary earthenware pipe by any ordinary workman,
and are in a position where they are not likely to be displaced or tampered with.
Although I prefer that the frame, and valve seat should be of glazed stoneware,
and the valve-leaf of aluminium, and corrugated, I would have it understood that
the frame and valve seat may be of metal, or other suitable material, and the
valve-leaf may be of other metal, mica, or other light material, and that the frame,
valve seat, and valve-leaf may be of round, square, or other suitable shape, and the
frame, valve seat, and valve-leaf may be adapted to be applied to any suitable
conduit.
With reference to the drawings, and more particularly to Figures 1, 2, 3 and 4,
a designates the glazed stoneware frame, and b denotes the opening or way therein,
c is the valve seat or face, and e denotes the valve-leaf which rests when closed
against the valve seat face c, this seat face c is preferably made with an incline, dis
the groove in which the upper part of the valve-leaf e fits, and d' are slits through
which the supporting arms (hereafter mentioned) of the valve-leaf are inserted to
rest in the parts d² of the groove, the front of the groove is flared or widened, as
shown at d³ in Figure 2, to provide for and limit the opening or travel of the valve-
leaf. The flap or leaf e forming the valve is provided with projections or arms e¹
by which the valve-leaf e is supported in the parts d² of the frame a free to vibrate
from, and to the valve seat face c. h designates the end socket of an earthenware
pipe into which the frame a is adapted to fit, and in which it may be set by a
cement or other joint h¹.
In the application of the frame a having the valve seat c, and valve-leaf e it may
be placed where, and as desired, for example, it may be placed as shown in Figure 5
in which designates the wall of a house, the house drain, with a trap k to
the sewer j, the footwalk, m the roadway, is a vertical pipe from the drain k
to the footwalk 7, and ³ are covers for inspection, n is an air inlet chamber having

page_text: a grating ¹, and p is an air inlet pipe from the chamber to the vertical pipe k².
The air inlet valves according to my invention may placed at either end of the
pipe p as shown, and open to permit of the inlet of fresh air from the chamber n
through the pipes p and 2 to the house drain k, but close to prevent the return of,
or escape of sewer gas, smell, or bad air.
In Figure 6 the vertical pipe 2 carrying the air inlet valve is set in a chamber
part of which has a grating cover which provides an air inlet, the air inlet valve
is fixed in a branch p as shown.
In Figure 7, s designates a closed chamber or man-hole, n denote conduits built
into the brickwork of the chamber, and forming air inlets either of which
may be used, and in which the air inlet valves are provided as shown, a' shows a
front view of the valve.
Amongst other advantages in connection with air inlet valves according to my
invention may be mentioned simplicity in construction and manufacture, in-
expensive mode of application, absence of complicated parts, no special pipes or
materials being required for fixing, and the valves can be fixed by an ordinary
workman, wherever required.
Having now particularly described and ascertained the nature of this
invention, and in what manner the same is to be performed, I declare that what
I claim is:-
1. An air inlet valve for sewers, and other drains, consisting of a frame adapted
to fit within the socket of a drain pipe, and provided with a valve seat, and -a
valve-leaf or flap formed of a sheet of suitable material, and having oppositely
projecting arms in the axial line of said valve-leaf to engage with the ends of a
groove formed horizontally in the upper part of said frame, said groove being flared
or widened, to permit said valve leaf to vibrate, and to limit its range of vibration,
substantially as described.
2. An air inlet valve for sewers, and other drains, consisting of a frame adapted to
fit within the socket of an earthenware drain-pipe, and having an opening
surrounded by a valve seat, the face of which is slightly inclined from a vertical
plane, and a valve-leaf or flap consisting of a thin sheet of suitable material of a
form to enter said valve-seat, and provided with arms projecting in opposite directions
in the horizontal axial line of said valve-leaf, and beyond the sides of the latter, to
engage with the ends of a horizontal groove formed in the frame above its
opening and flared, or widened to permit the vibration of said valve-leaf, and limit
the range thereof, substantially as described.
3. An air inlet valve for sewers, house drains, and analogous purposes, comprising a
frame having a valve seat, and a vibrating flap or valve-leaf hung to vibrate,
and seat itself on said valve seat, and adapted to fit into the socket of an ordinary
earthenware or other pipe or conduit, substantially as set forth, and as shown in
the 'accompanying drawings.
נופ .1.1.
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1000