Improvements in Water-waste Preventers.
Year: 1899

page_text: Date of Application, 8th May, 1899-Accepted, 10th June, 1899
COMPLETE SPECIFICATION.
Improvements in Water-waste Preventers.
We, THOMAS WILLIAM CRAKER, of No. 39, Nelson Road, West Street, Harrow-
on-the-Hill, Plumber, and HARRY WILLIAM DUNMORE, of Mount Farm House,
Roxeth, Harrow-on-the-Hill, in the County of Middlesex, Builder, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement: -
In water-waste preventers as they are usually arranged, when the cistern has
received its charge, the float is raised sufficiently to close the valve against the
service pressure. But, when, owing to the sudden closing of a valve or tap on
the service pipe or to other cause, the pressure in the service pipe is raised, the
supply valve of the water-waste preventer is opened forcing the float temporarily
down, so that it is set in vibration alternately opening and closing the valve, the
result being a considerable waste of water which overflows.
Our invention relates to means of preventing such waste from occurring and
to an improved construction of the float valve as we shall describe with reference to
the accompanying drawings.
Fig. 1 is a section of so much of a water-waste preventer modified according to
our invention, as is necessary to shew the modified parts. Fig. 2 is a section
of the valve with modified connection, and Fig. 3 is a section shewing another
modification of the valve.
Referring first to Fig. 1 above the cistern a in which the float b is mounted on
its lever which works the supply valve c, we provide an upper cistern d which
communicates with the lower cistern a by a pipe e having its upper mouth open
near the top of the upper cistern d, and extending down with its lower mouth open
near the bottom of the lower cistern a. The pipe e has also a small lateral hole f
at the bottom of the upper cistern d. The box of the valve c communicates by
connections with the upper cistern d.
The operation of the apparatus is as follows:-
When the float b is down the valve c is open and then water flows by the con-
nections g into the upper cistern d and after filling it nearly to the top overflows
by the pipe e and charges the lower cistern a to such a level that the float b rises
sufficiently to close the valve e whereupon the supply of water ceases.
But after the valve c is closed, the water in d passing through the hole f
descends into the lower cistern a filling it to a higher level and therefore giving
5 the float b greater buoyant force so that it keeps the valve c closed when the
pressure in the service pipe is considerably raised.
The valve consists of a ball h formed on the end of the stem on which the float
lever acts, this ball being covered with vulcanised caoutchouc, and seating on a
rounded hollow k at the mouth of the supply pipe 1.
Instead of covering the ball h with caoutchouc, the seating as shewn in Fig. 3
may be a caoutchouc washer m having a central hole the edge of which is drawn
heck he screwed thimble n.

page_text: Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what we
claim is:-
-
1. In a water-waste preventer, in combination with the cistern in which the
float is mounted an upper cistern with connections by which it is supplied from
the feed valve and supplies the lower cistern, substantially as and for the purpose
set forth.
2. The construction of the feed valve with caoutchouc covered ball, substantially
as described.
3. The modified construction of feed valve with caoutchouc seating, substantially
as described.
Dated this 8th day of Mo 1900
ABEL & IMRAY,
Agents for the Applicants.