Improvements in or relating to Drain Gullies or Gulley Traps.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in or relating to Drain Gullies or Gulley Traps.
I, JOHN WALKER, of 64, koscommon Street, Liverpool, in the County of
Lancaster, do hereby declare the nature of this invention to be as follows:-
This invention relates more especially to gullies for surface drainage, and the
object of my improvement is to provide gullies with traps, which while easily
allowing water to pass down into the sewer, prevents the reflux passage of foul
gas or air. My arrangement also provides means for making the water seal.
and readily effecting the cleansing of the gullies if foul without any danger of
breaking the apparatus, and furthermore to provide the gully with a valve.
In carrying the invention into effect, the plan I prefer is to form my gully of a
chamber or vessel which is let into the roadway or placed in any other situation
required. In the side of this chamber at a suitable height from the bottom thereof,
there is an opening which leads to the subterranean sewer, this opening being
by preference fitted with a removable grid, and being above the bottom there
On the top of
is permanently a body of water in the bottom of the chamber.
the chamber there is placed a frame for the gully grid, the grid lying flush with
the roadway. To this grid is attached a plate or diaphragm (or it may be formed
in one therewith) which when the grid is placed on top of the chamber dips down
a certain distance into the liquid in the chamber between the surface grid and
the exit opening, thus in conjunction with the water forming a trap, and shutting
off the reflux of foul air from the drains, while an overflow through the exit
opening is afforded to the water as it reaches a certain height. This plate or
diaphragm may be of any suitable shape so long as it separates the surface grid
from the exit opening and dips down into the water. The edges of the plate or
diaphragm by preference slide in guides in the chamber, and prevent the passage
of foul gas at that place.
To clean out the chamber all that is necessary is to lift off the frame with its
surface grid, and the plate or diaphragm being attached thereto, this latter is
lifted at the same time, thus breaking the water seal. The chamber can then be
easily cleared out without fear of breaking any part of the trap. and the grid
and the exit opening can also be removed for the purposes of cleaning or repair.
The trap I have described prevents the reflux of foul air from the drains. but
does not of course prevent the reflux of tidal or other water. To prevent there-
fore the reflux of water I provide when so required in the passage that leads from
the exit opening to the drains, a valve with a suitable valve seating. This valve
When in its normal position
is so arranged as to be capable of floating on water.
it will lie clear of the valve seat and enable surface water to flow down into the
drains. Should however there be a reflux of tidal water or the like, this floating
valve will rise onto its seat and thus prevent any reflux through the gully.
I have described my invention more especially in connection with gully traps
for surface drainage, but it is obvious that the invention may be applied to wash

page_text: bowls, water closet bowls, urinals, sinks and other appliances which discharge
into pipes or sewers.
Dated this 17th day of February 1898.
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Patent Agents for the Applicant.
Improvements in or relating to Drain Gullies or Gulley Traps.
I, JOHN WALKER, of 64, Roscommon Street, Liverpool, 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:
.:
This invention relates more especially to gullies for surface drainage, and the
object of my improvement is to provide gullies with traps, which while. easily
allowing water to pass down into the sewer, prevents the reflux passage of foul
gas or air. My arrangement also provides means for making the water seal,
and readily effecting the cleansing of the gullies if foul without any danger of
breaking the apparatus, and furthermore to provide the gully with a valve..
The invention will be understood from the following description, reference
being had to the accompanying drawings, in which :-
Figure 1 is a sectional view of my gulley trap and back-pressure valve;
Figure 2 a general external view of the drain gully and back pressure valve
separated from each other.
Referring to these figures, I form my gully of a chamber or vessel A which is
let into the roadway or placed in any other situation required. In the side of
this gully at a suitable height from the bottom thereof there is an opening which
leads to the subterranean sewer, this opening being by preference fitted with a
removable grid B, and being above the bottom there is permanently a body of
water C in the bottom of the chamber A. On the top of the chamber there is
placed a frame d for the gully grid D, the grid lying nearly flush with the road-
way. To this grid is attached a plate or diaphragm E (or it may be formed in
one therewith) which when the grid is placed on top of the chamber dips down
a certain distance into the liquid in the chamber between the surface grid D and
the exit opening B, thus in conjunction with the water forming a trap and
shutting off the reflux of foul air from the drains, while an overflow through the
exit opening B is afforded to the water as it reaches a certain height. This plate
or diaphragm may be of any suitable shape so long as it separates the surface
grid D from the exit opening B, and dips down into the water C. The edges of
the plate or diaphragm by preference slide in guides F and prevent the dis-
charge of foul gas at that place.
T
To clean out the chamber all that is necessary is to lift off the frame d. with
its surface grip D, and the plate or diaphragm E being attached thereto, this
latter is lifted at the same time, thus breaking the water seal. The chamber can
then be easily cleared out without fear of breaking any part of the trap, and the
grid B in the exit opening can also be removed for the purposes of cleaning or
repairs.
-
TO
The trap I have described, prevents the reflux of foul air from the drains, but it
does not of course prevent the reflux of tidal or other water. To prevent there-
fore the reflux of water I provide when so required in the passage that leads from

page_text: the exit opening to the drains, a valve G with a suitable valve seating H. When
in its normal position it will lie clear of the valve seat H and is forced away by
the surface water, as it flows down into the drains through the channel I. Should
however there be a reflux of tidal water or the like, this valve will be forced against
its seat and thus prevent any reflux through the gully. J is a suitable hand or
manhole.
I have described my invention more especially in connection with gully traps
for surface drainage, but it is obvious that the invention may be applied to wash
bowls, water closet bowls, urinals, sinks and other appliances which discharge
into pipes or sewers.
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed, I declare that what I
claim is:-
-
1. The improvement in drain gullies or gully traps, which consists in forming
them of a chamber or vessel having at a suitable height from the bottom, an
opening which leads to the subterranean sewer, a gully grid placed on top of the
chamber having a plate or diaphragm dipping down into the chamber below the
exit opening to the sewer and between it and the gully grid, whereby if there be
water in the bottom of the chamber the plate will constitute in conjunction with
the water, a trap adapted to shut off the reflux of foul air from the drains, sub-
stantially as described.
2. The combination with a drain gully or gully trap of the kind described,
of a back pressure valve located in the passage that leads from the exit opening
in the chamber to the drain, this valve being so arranged as to prevent the reflux
of tidal water or the like through the gully, substantially as described.
3. The general combined arrangement and construction of parts forming my
improved gully trap and back-pressure valve, substantially as described.
Dand thi 17th love of Navambon 1000
WM. P. THOMPSON & Co.,
Patent Agents, of Liverpool, Manchester, Birmingham and London.