Improvements in Water Waste Preventers.
Year: 1896

page_text: Date of Application, 8th Dec., 1896
Complete Specification Left, 9th Sept., 1897-Accepted, 30th Oct., 1897
PROVISIONAL SPECIFICATION.
Improvements in Water Waste Preventers.
I, OSCAR ELPHICK, of Lambeth Sanitary Engineering Works, Lambeth, in the
County of Surrey, do hereby declare the nature of this Invention to be as follows:-
Water waste preventers in which the delivery is effected by a syphon are open
to the objection that much noise occurs when air enters the lower end of the
syphon just before the flow ceases. In order to prevent this I arrange within the
cistern a cylindrical vessel open at the bottom and domed at the top which is
about at the water level in the cistern. A small air pipe ascends for a short
distance above the top of the dome. There is an aperture also in the side of this
vessel at such a level that it becomes uncovered a short time before the syphonic
action finishes. From this orifice a small pipe of U form passes; it dips beneath
the open mouth at the foot of the syphon and rises up some distance within it.
In operation the action is as follows:-As soon as the water has been drawn
out of the cistern by the syphon to such a level that the orifice in the side of
the cylindrical vessel becomes uncovered, air begins to be sucked into the
syphon through the U form tube and the syphon takes more and more air as
the orifice becomes more and more uncovered until fin y the syphon ceases to
act.
Such noise as results from this operation is for the most part smothered within
the domed cylindrical vessel which only communicates with the outer air by a
pipe of small dimensions. Or to prevent the escape of sound even more effectually
this air pipe may form the cistern overflow and pass to the outside of the house.
In this case the sound suppressing vessel may be made of smaller dimensions
than would otherwise be desirable.
Dated this 7th day of December 1896.
OSCAR ELPHICK.
COMPLETE SPECIFICATION.
Improvements in Water Waste Preventers.
I, OSCAR ELPHICK, of Lambeth Sanitary Engineering Works, Lambeth, in the
County of Surrey, 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:-
Water waste preventers in which the delivery is effected by a syphon are open
to the objection that much noise occurs when air enters the lower end of the
svphon just before the flow ceases. In order to prevent this I provide means
for admitting air slowly to the syphon a short time before the syphonic action

page_text: finishes and for gradually admitting. more and more air until finally the syphon
ceases to act.
The drawings annexed shew three ways of effecting this object.
In the arrangement shewn at Figure 1 a cylindrical vessel a open at the bottom
and domed at the top is placed within the cistern. The top of the vessel is about
at the water level in the cistern. A small air pipe b ascends for a short distance
above the top of the dome. In the pipe bare apertures c which are more or less
covered by a screw cap d, and in this way the flow of air into the vessel can be
restricted. There is an aperture e in the side of the vessel a at such a level that
it becomes uncovered a short time before the syphonic action finishes. From this
orifice a small pipe f of U form passes; it dips beneath the open mouth at the
foot of the syphon leg g and rises up some distance within it.
In operation the action is as follows:-As soon as the water has been drawn
out of the cistern by the syphon to such a level that the orifice e in the side of
the cylindrical vessel a becomes uncovered, air begins to be sucked into the
syphon through the U form fube f and the syphon takes more and more air as
the orifice becomes more and more uncovered until finally the syphon ceases to
act.
Such noise as results from this operation is for the most part smothered within
the domed cylindrical vessel which only communicates with the outer air by a
pipe of small dimensions. Or to prevent the escape of sound even more effectually
this air pipe may form the cistern overflow and pass to the outside of the house.
In this case the sound suppressing vessel may be made of smaller dimensions
than would otherwise be desirable.
In the arrangement shown in Figure 2 there is a cylindrical vessel a constructed
as in Figure 1 except that there is no aperture e in it. In this case a pipe h
passes from the top of the syphon cylinder i to a convenient depth in the vessel a.
The end of the pipe h in the vessel a is cut off obliquely as is shown in the
drawing; by this means as the water is sucked out of the vessel a, air is at
first admitted into the syphon cylinder slowly but in an always increasing volume
until the syphon finally ceases to act.
In the arrangement shown in Figure 3 a pipe bent at right angles at the
top is screwed into a socket in hend 7 of the syphon. The pipe k can turn in the
socket so that the depth of its end in the cistern can be regulated according to the
variation in the suction caused by the length of the down pipe of the syphon.
The end of the pipe in the cistern is cut obliquely and as the water is sucked out
of the cistern and the water level comes below the top of the oblique opening
air is at first admitted into the syphon slowly but in an always increasing volume
until the syphon finally ceases to act.
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. In water waste preventers means for admitting air slowly to the syphon a
short time before the syphonic action finishes and for gradually admitting more
and more air until finally the syphon ceases to act substantially as described.
2. Apparatus substantially as described and shown in Figure 1.
3. Apparatus substantially as described and shown in Figure 2.
4. Apparatus substantially as described and shown in Figure 3.
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