An Improved Flushing Syphon System.
Year: 1897

page_text: Date of Application, 27th May, 1897-Accepted, 3rd July, 1897
COMPLETE SPECIFICATION.
An Improved Flushing Syphon System.
I, JAMES MARSH, of No. 477 Little Bourke Street, Melbourne, in the Colony of
Victoria, 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 :—
This invention relates to what are known as syphon cisterns for flushing water-
closets, drains and for analogous purposes, and its object is to provide a simple and
inexpensive apparatus which will always deliver a sufficient quantity of water to
effectually flush the water closet drain or other place even if the operating appliance
be not properly worked.
It consists mainly of a novel construction and arrangement of S-trap or syphon
and its starting bell.
In order that the invention may be readily understood I will describe it by
reference to the accompanying drawings wherein,-
Figure 1 is a vertical central section, and
Figure 2 is a plan of a flushing syphon cistern constructed according to my
invention.
Figure 3 is a horizontal section of the S-trap or syphon the section being taken
on the line 3, 3, Figure 1.
Figure 4 is a vertical section of said S-trap or syphon the section being taken on
the line 4, 4, in Figure 3.
A. represents a cistern constructed to hold a sufficient quantity of water to flush
a water-closet, drain, or the like, and having its bottom made with a well, or
depression, B, into which is screwed or otherwise secured the S-trap or syphon C
constructed as hereinafter described. D represents a syphon-starting-bell, or cover,
arranged to fit over the whole of the S-trap, or syphon, C, and to extend down to
near the bottom of the well B. The said bell has a trunnion D1 on each side which
trunnions rest in hooks at the ends of the arms E, which arms project from a cross
bar El the ends of which rest and rock in recesses formed for the purpose in the
sides of the cistern and has secured to it an operating arm E2 to which is attached
a chain G having a convenient handle at its lower end. The operating arm E² is
provided with a downwardly projecting curved lug or stop-piece H which when the
chain G is pulled down to start the syphon, comes in contact with the side of the
cistern and with the rim around the said cistern when the bell is returned to its
normal position.
An ordinary ball-cock I is used, it being operated in the usual automatic way
for the purpose of supplying the cistern with water.
The bell, or cover, D, does not drop quite to the bottom of the well B but rests,
when in its lowest position, upon ribs, or projections, J, provided for the purpose
of keeping its lower edge off the bottom of the well, as shown in Figure 1. The
syphon C is preferably made in one casting with single dividing walls between its
passages and with its interior, and especially its inlet end, of larger sectional area
than its discharge end, the object being that when the syphon is started it will give

page_text: a more sudden discharge of water and therefore ensure a better flushing action than
would otherwise be the case.
With the above described construction of flushing cistern the air-lock of the
S-trap or syphon will be released no matter whether the bell D is raised slowly, or
quickly, and if held in its raised position it will still ensure sufficient water (in fact
nearly the whole cistern full) being discharged into the water closet, drain or other
place so as to effectually flush them.
This beneficial result is obtained partly by reason of the bell, or cover, D, encircling
the whole of the S-trap, or syphon, C, and partly because of the employment of the
well B.
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. The herein described flushing syphon cistern consisting of the various parts
constructed and arranged substantially as, and for the purposes, herein described
and illustrated in the accompanying drawings.
2. In a flushing syphon cistern the combination with an S-trap or syphon (such
as C) of a starting bell, or cover (such as D) encircling the whole of said S-trap or
syphon substantially as, and for the purposes, herein described and illustrated in
the accompanying drawings.
3. In a flushing syphon cistern an S-trap or syphon made in one casting and
having single dividing walls between its passages the area of nearly the whole of
which in cross section, as well as that of its inlet end, is larger than that of the
delivery end substantially as and for the purposes herein described and illustrated
in the accompanying drawings.
14. do- of Anmil One thousand eight hundred and ninety-seven.