Improvements in Syphon Flushing Cisterns.
Year: 1891

page_text: Date of Application, 29th Apr., 1891
Complete Specification Left, 29th Jan., 1892-Accepted, 5th Mar., 1892
PROVISIONAL SPECIFICATION.
Improvements in Syphon Flushing Cisterns.
I, JOHN MERRILL Albany Road, Sheffield in the County of York, Mann-
facturer, do hereby declare the nature of my invention to be as follows:-
This invention has for its object to simplify the construction of automatic syphon
flushing cisterns for waterclosets and for other like purposes.
I have found as the result of experiments, that I may dispense with the tipping
chamber attached to the tumbler or like tipping vessel, and also with the filling
pipe, both of which are described in my previous Patent No. 10696 July 10, 1890
and illustrated in Fig. 6, of the drawings, and I propose in one arrangement, to fix
in the cistern a syphon of any approved construction, and to carry the long leg or
outlet end of the syphon into a tumbler or tipping vessel, pivotted in a compartment
under the cistern and communicating with the closet flushing pipe.
When the water in the cistern, which may be supplied at any desired speed, rises
in the syphon sufficiently high, it runs over the "bend" and down the long leg into
the tumbler eventually sealing the end of the pipe.
This overflow into the tumbler continues but the air being now confined in the
syphon, the water in the cistern also rises in the same proportion or thereabouts,
until the height of water in the tumbler causes it to tip and discharge its contents
at the same time unsealing the end of the long leg.
The head of water in the cistern, at once charges the syphon and empties the
cistern.
According to another arrangement I terminate the long leg or outlet of syphon
over the tumbler instead of carrying it to the bottom, and so that the overflow of
water through the syphon will drop into and eventually fill same.
The tumbler tips and discharges; the displacement thus caused pulls the water
over the bend and charges the syphon.
Dated the 27th dex of Anril 1801
ROBT. F. DRURY, F.I.P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicant.
COMPLETE SPECIFICATION.
Improvements in Syphon Flushing Cisterns.
I, JOHN MERRILL Albany Road, Sheffield in the County of York, Manu-
facturer, 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 has for its object to simplify the construction of automatic syphon
flushing cisterns for water closets and for other like purposes.
I have found as the result of numerous experiments that I may dispense with the
auxiliary or tipping compartment attached to the tumbler, or tipping vessel proper,
and also with the small filling pipe, which are both described in my prior Patent
No. 10696 July 10, 1890, and illustrated in Fig. 6 of the drawings..
My present invention is illustrated in the annexed sheet of drawings in which
Fig. 1, represents a sectional elevation of a cistern made according to my
invention.
Fig. 2 is a similar sectional elevation of a cistern with modified details.
Similar letters of reference indicate similar parts in either of the figures.

page_text: In carrying out the invention as illustrated in Fig. 1, 1 fix in the cistern C, a
syphon S, of any approved construction, but preferably as that shown, and I carry
the long leg L, or outlet end into a tumbler T, or other equivalent tipping vessel,
pivotted in a compartment K, under the floor of the cistern and communicating
directly with the closet flushing pipe P.
The end of the leg L, is carried nearly to the bottom of the tumbler T, as
shown.
When the water in the cistern C, which may be supplied so as to fill the cistern
in any pre-determined time, rises in the syphon S, sufficiently high, it runs over the
bend and down the long leg L, dripping into the tumbler T, until eventually it seals
the orifice of the pipe, and the air in the syphon being confined, the water in the
cistern rises in about the same proportion as that in the tumbler.
When the tumbler is full or thereabouts it tips, and discharges its contents,
unsealing at the same time the end of the long leg L, and the head of water in the
cistern at once charges the syphon and rapidly empties the cistern into the flushing
pipe P.
According to the modification shown in Fig. 2, I construct the long leg L, of
syphon S, so as not to dip into the water in the tumbler T, when it is filled to the
right height, and in this arrangement I make the tumbler larger than is required in
the former arrangement, I also arrange the top of the long leg of the syphon to be
about one inch below the top of the cistern C. When the cistern is filled to the
proper height, that is about an inch from the top, the water runs down the syphon
pipe and fills the tumbler, which when full, tips and throws out its contents. The
body of water flows down the outlet pipe P, carrying the air with it and causes in
consequence a sucking action upon the syphon which draws the water over the
bend.
This flow of water rapidly increases until the syphon is completely charged, and
the water in the cistern is then discharged, but the efficiency of this method
depends upon the use of a down pipe P.
Having now particularly described and ascertained the nature of my inven-
tion, and in what manner the same is to be performed I declare that what I
claim is :-
1-A syphon flushing cistern, having a chamber or compartment underneath
which communicates directly with the flushing pipe, and containing a simple tipping
vessel, into which the long leg of the syphon dips deep enough to become sealed
when water flows down the syphon pipe into the tipping vessel, for the purpose
specified and substantially as herein before described, and as shown in Fig. 1 of the
drawings.
2-A syphon flushing cistern, having a chamber underneath, communicating
directly with the flushing pipe, and containing a simple tipping vessel or tumbler
into which the long leg of the syphon conducts the overflow of water before
charging, but does not dip so as to become sealed, in combination with a flushing or
down pipe (P) substantially as hereinbefore described, and as shown in Fig. 2 of
the annexed drawings.
Dated the 27th day of January 1895
ROBT. F. DRURY, C.P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicant.