Improvements in Flushing Cisterns.
Year: 1892

page_text: Date of Application, 6th Dec., 1892
Complete Specification Left. 28th Aug., 1893-Accepted, 30th Sept., 1893
PROVISIONAL SPECIFICATION.
Improvements in Flushing Cisterns.
I, FREDERICK SARA of 4 Greenbank Avenue, Plymouth, in the County of
Devon, Ironmonger, do hereby declare the nature of this invention to be as
follows:-
My invention relates to flushing cisterns or waste preventers of the kind in which
a syphon is employed and the chief object of my invention is to provide a cistern
which operates with greater certainty and with less noise than cisterns of the kind
as heretofore constructed.
In carrying out my invention I provide a cylinder in which 'slides a piston
or plunger connected with a lever in the ordinary manner. Upon one side of this
cylinder is a chamber or box communicating with the interior of the said cylinder
and also with the cistern, the opening to the cistern being normally closed by a
valve. To the said chamber is also connected the short leg of the syphon in such
a manner that when the piston or plunger is moved down in its cylinder the water
therein will be forced into the syphon to start the same, the valve in the bottom
of the chamber being closed until the syphon is started when it opens to allow the
water from the cistern to flow into the syphon.
In order to prevent noise as much as possible I arrange an air tube communicating
with the top of the syphon and extending so far down into the cistern that it will
admit air into the syphon to stop the same before the water has got low enough to
uncover the valve and thereby produce the usual objectionable gurgling noise.
The inlet cock is provided with a pipe extending nearly to the bottom of the
cistern to prevent noise when the cistern is filling.
Dated the 6th day of December 1892.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Flushing Cisterns.
I, FREDERICK SARA, of 4, Greenbank Avenue, Plymouth, in the County of
Devon, Ironmonger, 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 relates to flushing cisterns or waste preventers of the kind in which
a syphon is employed and the chief object of my invention is to provide a cistern
which operates with greater certainty and with less noise than cisterns of the kind
as heretofore constructed.
In carrying out my invention I provide a cylinder in which slides a piston or
plunger connected with a lever placed or extending outside the cistern and to which
the usual pull-handle is attached. Upon one side of this cylinder is a chamber or
box communicating with the interior of the said cylinder and also with the cistern,
the opening to the cistern being normally closed by a valve. To the said chamber
is also connected the short leg of the syphon in such a manner that when the piston
or plunger is moved down in its cylinder the water therein will be forced into the
syphon to start the same, the valve in the bottom of the chamber being closed until
the syphon is started when it opens to allow the water in the cistern to flow into
the synhon.

page_text: In order to prevent noise as much as possible I arrange an air-tube communicating
with the top of the syphon and extending so far down into the cistern that it will
admit air into the syphon to stop the same before the water has got low enough to.
uncover the valve and thereby produce the usual objectionable gurgling noise.
The inlet cock is provided with a pipe extending nearly to the bottom of the
cistern to prevent noise when the cistern is filling.
To enable my invention to be fully understood 1 will describe how it can be carried
into practice by reference to the accompanying drawings, in which :-
Figure 1 is a sectional elevation of a flushing cistern constructed according to my
invention.
Figure 2 is a horizontal section drawn to an enlarged scale and taken through the
line 2-2 of Figure 1; and,
Figure 3 is a vertical section also drawn to an enlarged scale and taken through the
line 3-3 of Figure 2.
Similar letters in all the figures indicate similar parts.
a is the cistern, the cover thereof, e the lever to which the pull-handle is
attached, the inlet cock, e the ball or float of the same, f the outlet to the flushing,
pipe g, and the overflow pipe, all of which parts are of usual construction.
is the cylinder which I fix to the bottom of the cistern a; j is the piston
or plunger sliding in the said cylinder and connected to the lever by means of a
lever fulcrummed to a link pivotted to a lug or bracket upon the cylinder i, the
lever being attached to the rod m of the piston ; and to a rod n serving to suspend
the counterweight o from the lever c.
p is the chamber or box communicating by means of an opening with the
interior of the cylinder i, and by an opening r with the cistern a; is the valve
which normally closes the opening »; t is the syphon the short leg of which is
formed integral with the chamber p, as shewn in Figure 3, or is connected thereto..
u is the air-tube communicating with the top of the syphon and extending down to
within a short distance of the level of the valves; is the pipe with which
I provide the inlet cock d, such pipe extending nearly to the bottom of the
cistern a.
The action of the flushing cistern is as follows:-
:
Assume the cistern to be full of water. Upon the lever c being pulled by means
of the handle attached thereto in the ordinary manner the piston or plunger will
be moved down in the cylinder i and the water therein will be thereby forced into
the chamber p and syphon t which latter will be consequently started, the valve s
remaining closed until this has been done when it opens to allow the water from the
cistern a to flow into the syphon, and down the flushing pipe g. As soon as the
water, as the cistern is emptying, has uncovered the mouth of the tube u air is
admitted into the syphon and stops its action, the water not having got low enough
to uncover the valves and thereby produce the gurgling noise hereinbefore alluded
The ball e falling with the level of the water opens the inlet cock d in the usual
manner and allows the cistern to become again filled with water, the pipe c'
preventing the noise which is usually caused by the water issuing from the supply
pipe at or near the top of the cistern. On the handle being released the weight o
quietly brings the piston or plunger back to its raised position as shewn in
Figure 1.
.to.
I would observe that for greater convenience I find it advantageous to place a
bracket or lug w for the lever c at each end of the cistern a as by this means.
am enabled to arrange the cistern to be actuated from either the right or left
hand end. I also arrange the inlet cock dand overflow pipe i so that their positions
can be reversed.
I
.
ن.
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 1
claim is :-
1. A flushing cistern or waste preventer having a piston or plunger actuated by

page_text: a suitable handle and working in a cylinder provided with a chamber or box
communicating with the said cylinder, with the cistern, and with a syphon, the
opening to the cistern being closed by a valve until the syphon is started when
it opens to allow the water in the cistern to flow into the syphon, substantially as
hereinbefore described.
2. In a flushing cistern or waste preventer of the kind referred to in the preceding
claiming clause, an air tube communicating with the top of the syphon and
extending so far down into the cistern that it will admit air into the syphon to stop
the same before the water has got low enough to uncover the valve substantially
as, and for the purpose, hereinbefore described.
3. In a flushing cistern or waste preventer of the kind referred to in the first
claiming clause an inlet cock provided with a pipe extending nearly to the bottom
of the cistern substantially as, and for the purpose, herein before described.
4. The improved flushing cistern or waste preventer hereinbefore described and
illustrated in the accompanying drawings.
Dated the 28th day of August 1893.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.