Improvements in Water-waste Preventing Tanks, Cisterns, and the like.
Year: 1895

page_text: Date of Application; 14th Dect, 1895"
Complete Specification Left, 14th Sept: 1396-Accepted, 17th Oct., 1895
Improvements in Water-waste Preventing Tanks, Cisterns, and
the like.
I, ROBERT ANDREW MARSHALL, of Union Road Sanitary Works, Clapham,
In the County of Surrey, Sanitary Engineer; do hereby declare the nature of this
invention to be as follows:-
My invention consists in improvements in water-waste preventing tanks, cisterns
and the like.
The main feature of my invention is to ensure a silent action.
With the majority of the present water-waste preventers' with the inrush of water
through the inlet pipe air enters the pipe and creates an objectionable sound.
•
Another important advantage in my invention is that the volume of water
required according to the size of the cistern is discharged in much less time than
heretofore, the force thereby being considerably increased..
The way in which I carry out my invention is as follows:-
I take the ordinary water-waste preventing cistern such as is used for household
purposes. A cylindrical shaped vessel is contained in the cistern around the bottom
of which is a rib or downward projection 'encircling the vessel except that portion
immediately opposite the inlet pipe or ball-tap. Preferably in the centre of the
bottom of this cylindrical vessel is a loose valve disc so centred as to always descend
the same position: In the centre of the cylinder is fixed the syphon pipe-with
any connection to the discharge: Surrounding the syphon pipe is what I call an
upper disc approximately fitting the cylinder and connected by links to the usual
counter-balance weight.
to t
The action is as follows:-
The normal position of the large disc' is at the top of the cylindrical vessel,
being kept in this position by the counter-balance lever. In this position the
'cylinder is supposed to be full of water: When my invention is put into action by
operating the pull, the counter-balance 'weight is raised, which forces down the
upper large disc; and the initial thrust "closes the 'lower disc on 'to the bottom of
the cylinder: By that action' the downward thrust of the upper disc into the water
contained in the cylinder forces 'the water' out of the only outlet, that is, through
the syphon-pipe into the discharge."
The hissing or objectionable noise which is usually set up in the ordinary cistern
arises during the ingress of water into the cistern after the discharge. With my
invention when the vessel has been exliausted the volume of air is reduced, through
the projection at the bottom of the cylindrical vessel being immediately opposite
the inlet pipe, to such'an 'extent that while a certain amount of air is necessary.
to 'the 'working' of 'the 'cistern that much and no more is allowed to enter the
syphon-pipe.
Dated this 14th day of December-1895:
JOHN PO'DONNELL, Fel: Chart. 'Inst. P.A.,
70 & 71 Palace Chambers, Westminster, S.W.,
Agent for the said 'Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in Water-waste Preventing Tanks, Cisterns, and
the like.
1, ROBERT ANDREW MARSHALL, of Union Road Sanitary Works, Clapham,
in the County of Surrey, Sanitary 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:-
My invention consists in improvements in water-waste preventing tanks, cisterns,
and the like, its main object being to ensure a silent action.
With the majority of the present water-waste preventors, with the inrush of
water through the inlet pipe air enters the pipe and creates an objectionable
Bound.
Another important advantage in my invention is that the volume of water
required according to the size of the cistern is discharged in much less time than
heretofore the force thereby being considerably increased.
The way in which I carry out my invention is as follows:-
1 take the ordinary water-waste preventing cistern such as is used for household
purposes. A cylindrical shaped vessel is contained in the cistern around the bottom
of which is a rib or downward projection encircling the vessel except that portion
immediately opposite the inlet pipe or ball-tap. Preferably in the centre of the
bottom of this cylindrical vessel is a loose valve disc so centred as to always descend
to the same position. In the centre of the cylinder is fixed the syphon pipe with
any connection to the discharge. Surrounding the syphon pipe is what I call an
upper disc or piston approximately fitting the cylinder and connected by links to
the usual counterbalance weight.
In order that my invention may be better understood and more readily carried
into effect I will describe it with reference to the accompanying drawings, in
which,-
Figure 1 is a side view of the tank with part of the front removed to show the
internal parts in the normal position.
Figure 2 is a plan of the outside of the cistern entire.
Figure 3 is an end view partly in section.
Figure 4 is a side view in section showing the parts in the worked position.
Figure 5 is a part sectional plan X-Y of Figure 1.
The same letters refer to the same parts in the several figures of the drawing.
a is the main cistern, bis the internal cylinder, c is the circular downward pro-
jection at the bottom of the cylinder b; d is the valve disc, e is the upper disc or
pistou rigidly connected to the collar which works loosely round the syphon pipe,
9 are the links connecting the piston e to the counterbalance lever j, the usual
chain being connected to the end of the lever j for operating the cistern.
the usual ball-valve, 1 is the outlet or discharge pipe, and m the syphon pipe.
The action of my invention is as follows:-
k is
To work
In Figure 1 the cistern is in the normal condition with the piston e towards the
top of the cylinder, the said piston being kept in this position by the counterbalance
lever. In this position the cylinder bis supposed to be full of water.
the appliance the counterbalance lever is pulled downwards by means of the
usual chain, the piston e is moved through the links g to the bottom of the cylinder b,
the valve disc d through the pressure of water is moved to close the aperture in
the bottom of the cylinder in order to prevent the water already contained in the
cylinder from escaping into the cistern through the downward pressure of the
piston; the water in the cylinder is forced by the downward thrust of the piston
is forced up through the syphon pipe m and syphonic action is set up drawing the
disc d upwards to allow the water in the main cistern or tank to be discharged

page_text: through the outlet pipe 1. The hissing or objectionable noise which is usually set
up in the ordinary cistern arises from the inrush of air into the syphon pipe after
the discharge. With my invention when the cistern has been exhausted in the
manner described the velocity of air entering the cylinder on its way to the
syphon pipe m is reduced through the projection on the bottom of the cylinder
being immediately opposite the inlet pipe k.
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 water waste preventor, a circular rib or projection such as partially
extending round the cylinder, leaving an opening opposite the inlet pipe, substantially
as and for the purpose herein described.
2. In a water-waste preventor, a disc valve at the bottom of the cylinder
operating that when the piston lowered the valve is forced on to its seating,.
preventing the flow of water from the cylinder to the tank, the water in the
cylinder being forced up the syphon pipe, the valve being released by the discharge
of the water in the cylinder and syphonic action set up to draw the water in the
tank up the syphon pipe and down the discharge pipe, substantially as herein.
described and illustrated in the accompanying drawing.
3. In a water-waste preventor, arranging a loose piston around the syphon
pipe connected to the counterbalance lever by links, substantially as described and
illustrated.
Dated this 14th dam of Cantamban 1906
JOHN P. O'DONNELL, Fel. Chart. Inst. P.A.,
70 & 71 Palace Chambers, Westminster, S.W.,
Agent for the said Applicant.