A New or Improved Syphon Flush-out Cistern for Water Closets.
Year: 1893

page_text: Date of Application; 18th Mar., 1893
Complete Specification Left, 16th Dec., 1893-Accepted, 10th Feb., 1894
PROVISIONAL SPECIFICATION.
A New or Improved Syphon Flush-out Cistern for Water Closets.
I, CHARLES DARBAH of Miller Street, Manchester, Manufacturer, do hereby
declare 'the nature of my' said invention to be as follows:-
i
This invention consists of a novel arrangement of syphon for emptying the
contents of a water closet cistern down the flush-out pipe under the pull of the
usual operating handle or rod.
In accordance with my invention I employ a pipe or tube which I place vertically
inside the cistern. with its upper extremity closed and its lower extremity open and
in close proximity to the bottom of the cistern. From the side of this tube and
near the top end I lead a branch pipe which communicates with the flush-out
or down pipe of the cistern. Within the tube aforesaid I fit a piston or plunger
capable of working freely in said tube,' and 'secured to, a rod, chain or wire or
set of rods, chains, or wires which passing through a hole or holes in the
enclosed end of the tube is or are secured to the operating lever of the cistern.
It will be readily seen that by operating the handle or rod of the oistern,
the piston in the tube will be caused to rise and so cause the water in the cistern
to flow up the tube and down the branch pipe leading to the ordinary, down
pipe so starting the syphon.
The piston being light the rush of water serves to keep it up above the
opening of the branch pipe until the cistern is drained and the syphon action
becomes destroyed by the bottom end of the tube becoming uncovered by the
water.
The piston may be formed with openings, covered. by hinged or other suitable
valves to allow for the water to readily get above the piston.
"
COMPLETE SPECIFICATION.
A New or Improved Syphon Flush-out Cistern for Water Closets.
I, CHARLES DAHRAH of Miller Street, Manchester, Manufacturer, do, hereby
declare the nature of py said 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 consists of a novel arrangement of-syphon-for-emptying the
contents of a water closet cistern down the flush-out pipe under the pull of the
usual operating handle or rod.
And in order that my said invention shall be the more readily understood and
carried into practical effect I have hereunto annexed a sheet of drawings illustrating
in Figs. 1 and 2 respectively transverse sectional views of a cistern with my
improved flushing apparatus applied thereto and I will now proceed to describe
the several parts thereof with the assistance of the various letters of reference
marked thereon.
In accordance with my invention I employ a pipe, tube or barrel A, which is
placed vertically inside the cistern B as illustrated, with its upper extremity C

page_text: .
closed and its lower extremity D open and in close proximity to the bottom of the
cistern. From the side of this tube and near the top end thereof 1 lead a branch
pipe E which extends downwards and communicates with the usual flush out or
down pipe Fas illustrated. Within the tube A a thin circular plate or piston G
is fitted which is capable of working freely up and down in said tube and is secured
to a rod. H which passes through the opening I in the closed end of the tube and is
connected to the operating lever J.
The cistern being filled with water, the inflow of which is controlled by the
usual valve K and ball float L in the usual maner, the piston G owing to its
slackness of fit remains in its lowest position as seen in dotted lines in Fig. 1
allowing the water in the tube to rise to the same level as that in the cistern. By
now pulling the operating handle the piston in the tube will be caused to raise the
layer of water above it until the opening in the down pipe is reached when such
layer of water will flow down the branch pipe so starting the syphon, the water in
the cistern following the piston and flowing down the branch pipe E until' the open
end D of the tube A is uncovered and the syphon action is destroyed.
The piston G being light the rush of water serves to keep it up above the
opening of the branch pipe as illustrated in Fig. 2 until the syphon action is
destroyed when it falls to its original position.
To
In practice I find that the opening I owing to the working of the rod, H becomes
enlarged and consequently interferes with the proper action of the syphon.
compensate for this I form the piston with a dished portion M. forming a well as
'illustrated in Fig. 3 and on the closed end of the tube A I form an annular rim or
flange N slightly less in diameter than the dished portion M' in the piston. Said
dished' portion of the piston is always filled with water, hence when the piston is
raised to its highest position and the syphon action is taking place the flango
aforesaid dips into the water contained in the piston and so forms a trap.
The piston may be formed with openings covered by hinged or 'other suitable
valves to allow for the water to get more readily above the piston. This form of
piston will fall to its lowest position as soon as the operating handle is released, but
the rush of water will be sufficient to keep the valves open.
Having thus 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
In automatic flushing apparatus for closets the use and employment of a tube or
barrel A, fitted with a piston G or its equivalent, and communication with the down
pipe of the cistern by a branch pipe E opening, into the said tube or barrel at a
point near the top end thereof and mounted and operating substantially as and for
the purposes hereinbefore described and illustrated on the accompanying drawing.
Dated this 15th day of December 1893.