Improvements in Waste Preventer Flushing Cisterns.
Year: 1895

page_text: Date of Application, 22nd May, 1895
Complete Specification Left, 15th Feb., 1896-Accepted, 21st Mar.,
1896
I, EDWIN JAMES PRESTON of the Firm of J. Stone & Co. of Deptford in the
County of Kent Engineers do hereby declare the nature of this invention to be
as follows:-
This invention has for its object the simplification and consequent saving in cost,
also increased reliability, of waste preventer cisterns for flushing closets, urinals and
such like.
In order to effect this, I form an annular syphon, consisting of an inner leg,
which is fixed in a well or recess under the bottom of main tank or cistern, the above.
inner leg having around it a loose outer leg or cap provided with a perforated
flange at its lower end, which flange fits loosely in the before mentioned well
or recess. To the said casing is connected a forked lever having its fulcrum in lugs.
on the top of the tank or cistern.
When the outer casing or leg is raised by the said lever, a portion of the water
above the perforated flange passes through the perforations in the flange and
through the play space around the flange thus allowing the well or recess to become
again filled, and on the forked lever being released the outer casing falls suddenly
and forces a sufficient quantity of water over the top edge of the inner leg to cause
a syphonic action and empty the tank.
The before mentioned perforations are also useful in checking the action of the
syphon, and preventing any dribbling when the tank is being refilled.
Dated this 22nd day of Man 1805
JENSEN & SON,
77 Chancery Lane, London, W.C., Patent Agents.
COMPLETE SPECIFICATION.
Improvements in Waste Preventer Flushing Cisterns.
I, EDWIN JAMES PRESTON, of the Firm of J. Stone & Co., of Deptford, in the
County. of Kent, Engineers, 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 the simplification and consequent saving in cost,.
also increased reliability, of waste preventer cisterns for the flushing of closets,.
urinals and such like.
In order to effect this I form an annular syphon consisting of an inuer leg which
is fixed in a well or recess below the bottom of the main tank or cistern the above
inner leg having around it a loose outer leg or cap provided with a perforated
flange at its lower end which flange tits loosely in the before mentioned well
To the said cap or casing is connected a forked lever having its fulcrum.
in lugs on the top of the tank or cistern.
or recess.
Fig. 1 of the accompanying drawings is a vertical section through a waste
preventer flushing cistern constructed according to this invention, Fig. 2 an end.
view and Fig. 3 a plan.

page_text: The inner leg A of the syphon is by means of a nut A¹ fixed to the bottom
of a well B' formed below the bottom of the main cistern B. Around this
leg is the loose outer leg or cap C provided at its lower end with a perforated
flange C¹ which fits loosely in the well B' and has perforations C² by preference
tapering down to a smaller diameter. Guiding ribs C³ are provided on the outside
of the cap C, and the latter is by preference of a taper form larger below as shown.
To the cap C is connected a lever D whose fork ends engage with slots in lugs C
on the outside of the cap. The lever D is on a spindle D which has its fulcrum
bearings in lugs B2 on the top of the cistern. A ball cock E is provided as usual
and the cistern has a cover F with hole for the cap to work through..
When the cap C is raised by a pull chain attached to the lever D, a portion of
the water above the perforated flange C₁ passes through its perforations C2 and
through the play space around the flange thus allowing the well B' to become again
filled, and on the forked lever D being let go the cap C falls suddenly and forces a
sufficient quantity of water over the top edge of the inner leg A to cause a
syphonic action and empty the tank. The perforations C2 are also useful in
checking the action of the syphon and preventing any dribbling when the tank is
being refilled.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what I
claim is :-
1. A waste preventer flushing cistern with annular syphon the inner leg of which
is fixed to the bottom of a well below the bottom of the cistern proper and the outer
leg or cap of which is provided with a perforated bottom flange adapted to work
freely up and down in the well actuated by a forked lever engaging with the cap
and having its fulcrum on the cistern substantially as set forth.
2. The construction of waste preventer flushing cistern with annular syphon as
described with reference to the drawing.
Dated this 15th day of February 1896
JENSEN & SON,
77 Chancery Lane, London, W.C., Patent Agents.