Year: 1886

page_text: Date of Application, 7th June, 1886.
Complete Left, 5th Mar., 1887.
Complete Accepted, 5th Apr., 1887.
I, CHARLES MAYNARD WALKER, of No. 155 Cannon Street in the City of London,
Engineer, do hereby declare the nature of this invention to be as follows:-
In the Specification to my patent No. 3560 of 19th July 1883, I described a
method of utilising the rise and fall of the tide or other body of water for raising
either a portion of that water, or another liquid such as sewage, from one level to
another, such method consisting mainly in the employment of three vessels or tanks,
one of which was made to fill with air at the fall of the tide so that at the rise of the
tide such air was compressed and caused to force the liquid contents of the second
tank, such as sewage, up into the third tank, situated at a higher level, so that the
sewage could be discharged at such level into the tide at or about high water.
According to my present improvement I dispense with such high level tank and
effect the discharge of the sewage directly from the lower tank into the tide at or
about high water. For this purpose, instead of placing the sewage storage tank either
at the same level as, or below the level of the tank in which the air is compressed by
the tide, I arrange it somewhat above the level of the latter and I provide it with a
rising discharge pipe, the upper end of which is somewhat below high water. Thus
assuming the air tank to be charged with air under the pressure of a head of water
equal to that of high tide, and the sewage tank to be charged with sewage, then on
allowing the compressed air from the air tank to pass into the sewage tank, the air
will force the sewage in the latter up through the discharge pipe into the tidal water,
because owing to the higher position of the sewage tank the pressure to which its
contents are subjected by the tidal water will be less than that to which the air is
subjected in the air tank."

page_text: Instead of providing the inlet of the air tank with a float valve that closes as the
tide rises, and causing the water to flow into the air tank through a stand pipe at or
near high water level, I may dispense with these arrangements, allowing the tidal
water to flow freely into and out of the air tank, the pipe connecting this with the sewage
tank being by preference provided with a valve, so that by keeping this closed, the
compressed air in the air tank can be prevented from passing into the sewage tank
until the air has become compressed to the full extent or nearly so, or until the tide
or other body of water has risen to the exact level at which it is desired to discharge
the sewage into it. The sewage tank is provided with an air cock which is opened
when the sewage is flowing into it, and is closed when the sewage is to be
discharged.
ABEL & IMRAY,
28, Southampton Buildings, London, W.C.,
Agents for the Applicant.

page_text: Improved Apparatus for Utilising the Rise and Fall of the Tide or
other Body of Water for Raising Sewage or other Liquids from
one Level to another.
I, CHARLES MAYNARD WALKER of No. 155 Cannon Street in the City of London,
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 stateinent :-
In the Specification to my Patent No. 3560 of 19th July 1883, I described a
method of utilising the rise and fall of the tide or other body of water for raising
either a portion of that water, or another liquid such as sewage, from one level to
another, such method consisting mainly in the employment of three vessels or tanks,
one of which was made to fill with air at the fall of the tide so that at the rise of the
tide such air was compressed and caused to force the liquid contents of the second
tank, such as sewage, up into the third tank, situated at a higher level, so that the
sewage could be discharged by gravitation at such level into tlie tide at a convenient
state of the tide.
According to my present improvement I dispense with such high level tank and
effect the discharge of the sewage directly from the sewage tank into the tide at or
about high water by pressure. For this purpose instead of placing the sewage storage
tank either at the same level as, or below the level of the tank in which the air is
compressed by the tide, I arrange it upon a slightly higher level than that of the latter
and I provide it with a rising discharge pipe the upper end of which is somewhat
below high water. Thus assuming the air tank to be charged with air under the
pressure of a head of water equal to that of high tide and the sewage tank to be
charged with sewage, then on allowing the compressed air from the air tank to pass
into the sewage tank, the air will force the sewage in the latter up through the
discharge pipe into the tidal water, because owing to the higher position of the sewage
tank the pressure to which its contents are subjected by the tidal water will be less
than that to which the air is subjected in the air tank.
Instead of providing the inlet of the air tank with a float valve that closes as the
tide rises and causing the water to flow into the air tank through a stand pipe at or
near high water level, I may dispense with these arrangements, allowing the tidal
water to flow freely into and out of the air tank, the pipe connecting this with the
sewage tank being by preference provided with a valve, so that by keeping this closed,
the compressed air in the air tank can be prevented from passing into the sewage
tank until the air has become compressed to the full extent or nearly so, or until the
tide or other body of water is at the exact level at which it is desired to discharge the
sewage into it. The sewage tank is provided with an air cock which is opened when
the sewage is flowing into it, and is closed when the sewage is to be discharged.
On the accompanying drawing I have shewn a diagrammatic section of the above
described apparatus which will enable it to be readily understood.
D is the sewage storage tank receiving the sewage from the town through a sewer
pipe B, the inlet of which into the tank may be provided with a check valve C. A is
the air tank, which communicates freely with the tidal water E through a pipe F and
which is situated somewhat below the level of the sewage tank D but so that the

page_text: pipe is uncovered at low water X in order to enable the whole of the contents of the
tank to be discharged. Air pipes G and H lead respectively from the sewage tank D
and air tank A to a convenient locality I where they are connected by a box L in
which pipe H is provided with an air valve H' the box being also provided with a
valve L' for admitting the outer air to and cutting the same off from either or both
of the tanks when required. The sewage tank D is provided with a discharge stand
pipe K, passing down to near its bottom, and rising to near high water level Y for the
discharge of its contents.
The sewer pipe B is provided with a shut-off valve B¹ worked from the locality I.
The action of the apparatus is as follows:-Assuming all the valves to be open, the
tank D will become filled with sewage, the air escaping through pipe G and valve L';
at the same time, if it be low water, the water will flow out of the tank A through
pipe F, and air will enter through valve H and pipe H. On the tide commencing to
rise, the valves H and L' are both closed, whereupon the air in A will be gradually
compressed, so that if at high water the valve H be opened, the air pressure in Ă
will be transmitted through pipes H and G to tank D, the contents of which will
consequently be discharged into the tidal water through pipe K at a velocity due to
the difference between the head of water above the tank A and that above D. On the
completion of the discharge of D's contents, valves L' and B are again opened for
refilling the tank with sewage, and after the tide has sunk below pipe F so as to
discharge the contents of tank A, valves H¹ and I are again closed, and the above
described operation is repeated.
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 in
respect of apparatus for raising liquids from one level or another by the rise and fall
of the tide or other body of water, is :-
1. The use of a tank or closed vessel situated at or about low water level and made
to communicate with the tidal water so as to be emptied at low water, and to contain
a charge of compressed air at high water, in combination with a second tank situated
at a somewhat higher level receiving a charge of the liquid to be raised through a
supply pipe with stop valve, and delivering such charge through a stand pipe reaching
to near high water level, the two tanks being connected by air pipes with valves or
cocks so arranged that in one position thereof the outer air can pass freely into or out
of both tanks, while in another position thereof, the charge of compressed air is made
to pass from the lower tank into the higher one so as to discharge its contents through
the stand pipe, substantially as herein described.
2. For discharging sewage into tidal water, the combination of a tank such as A
situated at or about low water and communicating with the tide in such manner as to
be made to contain a charge of compressed air at high water, a tank such as D situated
at a slightly higher level than the first named tank and receiving a charge of sewage
through a sewer pipe with a stop valve and communicating with the tidal water by a
stand pipe such as K reaching with its lower end to near the bottom of the tank and
with its upper end to near high water, and air pipes such as G and H connecting the
said tanks and provided with valves or cocks arranged and operating substantially as
herein described so that at one time the outer air can freely enter into and escape
from either or both tanks, and at another time the compressed air is made to pass
from tank A into tank D'so as to discharge its contents through the pipe K, sub-
stantially as set forth.
בד
T21 1
1 1005
ABEL & IMRAY,
Agents for the Applicant.