Improvements in Syphon Flushing Cisterns.
Year: 1896

page_text: Date of Application, 1st Apr., 1896-Accepted, 2nd May, 1896
COMPLETE SPECIFICATION.
Improvements in Syphon Flushing Cisterns.
1; HENRY CRUDGINGTON of 106 Newton Road, Sparkhill, in the City of
Birmingham, Manufacturer, 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 relation to syphon flushing cisterns of that type in which a
displacer or piston is employed working within a standing well or trunk cylinder
located within the cistern or fitted to the bottom of the same.
According to our improvements, the syphon and stand-pipe are made integral and
form as it were a three-legged and fixed syphon situated within a well or upright
cylinder and having working within the said well and over the syphon legs a disc,
piston or plate-like displacer, which is raised and lowered by a lever to whose end
the syphon is connected by hook-ended rods, works.
Thus in carrying out one form of our improvements, we take an ordinary flush
box and fix within the same a vertical standpipe having returned legs with open
bottoms coming within a short distance of the pierced bottom of the well or cylinder
which is slightly elevated to admit of water readily getting underneath the same
and passing through its piercings. We thus have an erect standpipe and two
depending legs made in one piece, thus constituting a three legged syphon whose
top extends a little above the top of the flush tank and with the said legs being open
at their tops to the standpipe (which may be flared at its entrance) and open at their
bottoms to the bottom of the well which has piercings for the water in the cistern to
inwardly pass through.
Working over the syphon and rising and falling vertically within the well is
a freely-moving piston, plate or dise raised and lowered through the medium of a
pair of fixed or jointed rods, links or equivalents, whose upper ends, which may be
hook shaped, are connected to like book-shaped ends of a fork-ended lever, which
turns upon a pin passing through a bracket supported by a piston and by means of
which lever the piston is picked up and depressed.
The combined standpipe and syphon legs have a stop shoulder coming upon the
bottom of the well which, with the standpipe and syphon, is secured by a nut
taking upon the tail end of the syphon below the underside bottom of the
cistern.
The standpipe is connected to the downpipe by the usual unioned tail piece, whilst
the lever is raised by an ordinary pull and the flush box is provided with a ball
valve and float and an overflow and other accessory parts found in ordinary flushing
cisterns..
Figure 1 of the accompanying drawings represents, in complete longitudinal
vertical section, a syphon flushing cistern, having a fixed syphon made integral with
the standpipe in accordance with my invention.
Figure 2 is a topside plan of the cistern but with the combined syphon and stand-
pipe in section upon the dotted line z Figure 1, showing how the tops of the legs of
the syphon are open to the flared upper end of the standpipe.
Figure 3 represents a cross section of Figure 1 upon the dotted line a¹, but showing
the syphon and the movable plunger in elevation.
Figure 4 is an elevation of the combined syphon and standpipe separately and
Figure 5 shows an edge view of the same.

page_text: Figure 6 represents an elevation and a section of the plunger separately.
The same letters of reference indicate corresponding parts in the several figures
of the drawings.
The flush box or cistern a, which is provided with the usual cover a', has fitted
or fixedly connected to its bottom a³, a vertical standpipe b, preferably screwed at
its lower end 6', to facilitate its connection to the cistern, whilst its upper end,
(which is flared) has leading from and formed integral with it, two fixed and
depending syphon legs,, whose lower and open ends come within a short
distance of the pierced bottom c, of the well c, surrounding the said combined stand-
pipe and syphon. The well c, is elevated slightly above the bottom of the flush
tank so that water may readily get underneath the same and flow through the
piercings and up the syphon legs, whose open ends are preferably located lignable
with said piercings.
d is the vertically working plunger or disc, located within the well and around
the combined fixed syphon and standpipe and having piercings d', d, d, where-
through the said syphon legs and standpipe b, pass. The said plunger is slightly
raised clear of the bottom of the well by the collar 6, on the standpipe and is lifted
and lowered through the medium of a pair of links or rods e, suitably connected at
their lower ends e, to the plunger whilst their upper ends are hooked at e, to
engage with hooked or equivalently formed ends f, of the branches f, of a forked
lever, counterpoised at its inward end, and jointed or pivoted at 73, to the edge
of the cistern and having at its outer end a pull chain and handle f, f, by
ineans of which the cistern is operated by the plunger being first raised and then
lowered.
The standpipe is locked to the cistern bottom by a nut g, and connected to the
tail piece h, of the downpipe by a union nut.
is the ball valve, g' the float, g the overflow and g its tail piece.
In operation, depress the outer end of the lever by the pull, when the piston is
raised, and water fills up the well under the piston, when on the pull being
released the piston descends by being counterpoised by the lever and forces the
water beneath it up the syphon legs, which meet at the mouth of the stand-
pipe, when the flow of water down the said standpipe creates as it were a
water piston, displaces the air, creates a partial vacuum and sets up a syphonic
action.
Instead of the piston being lifted by the pull it may be depressed by counter-
poising the lever so that the displacement of the water is created direct by
the pull.
As a further form the well may be set in the bottom of the cistern, and
if necessary a thin and loose dise may come between the bottom of the well and
the piston.
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 :-
First. In syphon flushing cisterns, the combination with a fixed stand pipe, of two
depending and fixed syphon legs, whose upper ends are open to and terminate in the
said stand pipe, thus forming a fixed and combined standpipe and syphon, substantially
as described and set forth.
Secondly. In syphon flushing cisterns, the combination with a well or cylinder,
situated within or at the bottom of the cistern, of a fixed and combined standpipe
and syphon, substantially as described and set forth.
Thirdly. In syphou flushing cisterns, the combination with a well having a
combined and fixed syphon situated within it, of a movable piston, plate or
plunger, operated by a lever whose inner end is counterpoised and working
vertically over and around the members or limbs of the said combined fixed stand-
pipe and syphon and within the inside bore of the well, substantially as described
and set forth.

page_text: Fourthly. The improvements in syphon flushing cisterns and in the general
construction, arrangement and combination of the parts of the same, substantially
as herein described and set forth.
DJ 0113
ML1000
HENRY CRUDGINGTON,
By Henry Skerrett,
24 Temple Row, Birmingham, Agent for Applicant.