IMPROVEMENTS IN AND RELATING TO FLUSHING CISTERNS FOR WATER CLOSETS, ALSO APPLICABLE TO OTHER PURPOSES WHERE IT IS REQUIRED TO DISCHARGE A GIVEN OR MEASURED QUANTITY OF LIQUID
Year: 1879

page_text: LETTERS PATENT to John Dodd, of Liverpool, in the County of Lancaster,
for the Invention of "IMPROVEMENTS IN AND RELATING TO FLUSHING
CISTERNS FOR WATER CLOSETS, ALSO APPLICABLE TO OTHER PURPOSES
WHERE IT IS REQUIRED TO DISCHARGE A GIVEN OR MEASURED QUANTITY OF
LIQUID"
Sealed the 16th March 1880, and dated the 20th September 1879.
PROVISIONAL SPECIFICATION left by the said John Dodd at the Office
of the Commissioners of Patents on the 20th September 1879.
"IMPROVEMENTS IN AND
JOHN DODD, of Liverpool, in the County of Lancaster.
RELATING TO FLUSHING CISTERNS FOR WATER CLOSETS, ALSO APPLICABLE TO OTHER
PURPOSES WHERE IT IS REQUIRED TO DISCHARGE A GIVEN OR MEASURED QUANTITY
OF LIQUID."
My Invention relates to certain improvements in that class of cisterns known as
flushing cisterns for water closets, namely, cisterns that will fill and discharge a
certain amount of water for each use of the closet for flushing purposes.
A flushing cistern constructed according to my Invention consists of a vessel
formed or fitted with a syphon pipe, the short leg of which opens out near the
bottom of the cistern and rises so that the elbow of the syphon comes nearly to the
water level of the cistern, the long leg of the syphon descends and joins onto the
flushing pipe or discharge pipe of the cistern, which forms a continuation of the long
leg. Inside the cistern the long leg is provided with a projection which forms a
seat for a valve which forms a communication between the syphon and the cistern.
The valve is worked by a rod or chain, and a lever in connection with suitable
hand or other gear for actuating the valve. The cistern is provided with a lever
and ball float which works a supply cock in connection with the cistern. The
cistern is filled with water by this supply cock, and when filled the supply ceases,
and when emptied the supply commences as usual.
In operation suppose the cistern to be full, then, by lifting the valve in connection
with the long leg of the syphon pipe, sufficient water enters the syphon pipe to
bring the syphon into operation, and empty the cistern, and ensure the whole
contents being emptied for flushing purposes. A quick opening and closing of the
valve is sufficient to bring the syyhon into operation, but should the valve be kept
open the water still flushes through the long leg of the syphon pipe.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said John Dodd in the Great Seal Patent Office on the 17th March 1880.
JOHN DODD, of Liverpool, in the County of Lancaster: "IMPROVEMENTS IN
AND RELATING TO FLUSHING CISTERNS FOR WATER CLOSETS, ALSO APPLICABLE TO
OTHER PURPOSES WHERE IT IS REQUIRED TO DISCHARGE A GIVEN OR MEASURED
QUANTITY OF LIQUID."
My Invention relates to certain improvements in that class of cisterns known as
flushing cisterns for water closets, namely, cisterns that will fill and discharge a
certain amount of water for each use of the closet for flushing purposes.
A flushing cistern constructed according to my Invention consists of a vessel
formed or fitted with a syphon pipe, the short leg of which opens out near the
bottom of the cistern, and rises so that the elbow of the syphon comes nearly to the
water level of the cistern, the long leg of the syphon descends and joins onto the
flushing pipe or discharge pipe of the cistern, which forms a continuation of the
long leg. Inside the cistern the long leg is provided with a projection which forms
a seat for a valve which formis a communication between the syphion and the
cistern. The valve is worked by a rod or chain, and a lever in connection with
suitable hand or other gear for actuating the valve. The cistern is provided with
a lever and ball float which works a supply cock in connection with the cistern.
The cistern is filled with water by this supply cock, and when filled the supply
ceases, and when emptied the supply commences as usual.
In operation suppose the cistern to be full, then, by lifting the valve in connection
with the long leg of the syphon pipe, sufficient water enters the syphon pipe to
bring the syphon into operation, and empty the cistern, and ensure the whole
contents being emptied for flushing purposes. A quick opening and closing of the
valve is sufficient to bring the syphon into operation, but should the valve be kept
open the water still flushes through the long leg of the syphon pipe.
As some water corporations or companies necessitate by their bye laws that
flushing cisterns shall be constructed to contain and discharge a given quantity of
water for each flush, or not more than a given quantity of water for each flush, I
arrange a flushing cistern according to my Invention so as to effect this object,
thus, I provide a tray or auxiliary receiver near the top of the cistern ärranged to
receive the water from the supply cock, and so that the receiver will contain, and
when full float the ball of the lever which works the supply cock. The receiver is
also provided with a valve which opens into the cistern proper. This valve is
worked by a rod or chain in connection with the lever which works the valve of
the syphon before referred to. The valves are so arranged so as to prevent the
supply of water which takes place during the emptying of the cistern by
the syphoning flush, forming part of such Bush. This is effected by arranging the
valve of the receiver so that it is always shut when the lever for actuating the
cistern is kept down, and is only opened to the full up stroke of the lever, and when
the syphon valve is closed, and is shut before the syphon valve is opened and the
flush commenced, the two valves cannot be opened at the same time.
That my Invention may be more clearly understood, I have hereunto attached a
Sheet of Drawings illustrative thereof which Drawings are marked with figures and
letters of reference corresponding with those in the following explanation, like
letters or figures being used to denote the same, or corresponding parts throughout
the various views.
Figure 1 is a sectional elevation of a flushing cistern constructed according to my
Invention.
Figure 2 is an end section, and
Figure 3 a plan of Figure 1..
Figure 4 is a sectional elevation of a flushing cistern according to my Invention,
arranged to discharge a given or measured quantity of water.
Figure 5 is an end section, and
Figure 6 a plan of Figure 4

page_text: Upon reference to the Drawings it will be seen that a flushing cistern constructed
according to my Invention consists of a vessel A formed or fitted with a syphon
pipe B, which may be situate in manner such as shown at Figure 1, or as shown at
Figure 5, or as shown at Figure 7; the short leg C of the syphon opens into the vessel
A near the bottom thereof, and rises so that the elbow of the syphon comes nearly to
the water level of the vessel A. The long leg D of the syphon B descends and joins
onto the flushing pipe or discharge pipe of the cistern at E. Inside the vessel A
the long leg D of the syphon is provided with a projection F which forms a seat
for the valve H which forms a communication when open between the syphon B
and the vessel A. The section of the syphon B and valve H will be understood
upon reference to Figure 4. The valve H is worked by the rod J and the lever K,
the lever K being operated by a chain or rod leading to the water closet. The
cistern A is provided with a lever and ball float L which works the supply cock M.
Where it is required to measure the flush of water the cistern A is constructed as
shown at Figures 4, 5, and 6, namely, with a tray N and receiver P, into which the
supply cock M discharges. The receiver P is provided with a valve R worked by
a rod S, which is attached to the lever K, as shown in the Drawings. The lever K
has a back balance K¹, and a stop K" as usual in such cases.
The operation of the cistern illustrated at Figure 1 is by lifting the valve H
(the cistern being full) sufficient water enters the pipe E to bring the syphon B
into operation, so that the whole contents of the cistern are discharged by the
syphon B.
The operation of the cistern illustrated at Figure 4 is by lifting the valve H (the
cistern being full) sufficient water enters the pipe E to bring the syphon B into
operation, so that the whole contents of the cistern are discharged by the syphon B.
As the cistern A empties, the supply of water through the cock M flows into the
receiver P, so that if the lever K is kept depressed, and the valve R shut, the water
in the receiver P lifts the float L, and thereby shuts off the water supply, rendering
it impossible to obtain a continuous flush or waste of the water from the supply M.
By my Invention it will be seen that a quick up and down movement of the lever
K is sufficient to ensure the contents of the cistern A. being emptied, and at the
same time should the lever K be kept down only one charge of the cistern A can be
obtained for a flush without waiting until the cistern has refilled.
Having now described and ascertained the nature, object, and purposes of my
Invention, and shown how the same may be carried out into practical effect, what
I claim as my Invention is,―
First. Constructing flushing cisterns, such as A, with a syphon pipe such as B,
provided with a valve such as H, arranged and operated in manner such as herein-
before described, and as illustrated at Figures 1, 2, and 3, of the accompanying
Drawings.
Second. A flushing cistern, such as A, provided with a syphon pipe, such as B,
and valve, such as H, and arranged with a tray and receiver, such as N, P, provided
with a valve R, operating so as to discharge only the contents of the cistern A as
herein described, and as illustrated at Figures 4, 5, and 6, of the accompanying
Drawings.
In witness whereof, I, the said John Dodd, have hereunto set my hand and