Improvements in or relating to Water Heating and Circulating Apparatus for Domestic or other Purposes.
Year: 1896

page_text: Date of Application, 39th Jan., 1396
Complete Specification Left, 28th Aug., 1836-Accepted, 3rd Oct., 1896
PROVISIONAL SPECIFICATION.
Improvements in or relating to Water Heating and Circulating
Apparatus for Domestic or other Purposes.
I, WILLIAM JAMES WOOSEY of 40, Norton Street, Liverpool in the County
of Lancaster Plumber, do hereby declare the nature of this invention to be as
follows:-
This invention relates to water heating apparatus of that kind in which there is
In
a boiler and a circulating cylinder placed within the circuit of the pipes.
apparatus of this kind, the cold water supply pipe which leads from the tank to the
circulating cylinder or boiler is liable sometimes to get stopped for example at or
near the top through frost or other cause. In such case if cold water is drawn
through the service taps from the supply pipe, the cold water being cut off, the
probabilities are that the water will be siphoned out of the circulating cylinder or
boiler, without the user having knowledge that anything is wrong, and the consequence
is that in course of time the cylinder and boiler will be completely emptied and a
serious burst or collapse of the boiler will probably ensue.
Now my invention is designed to prevent this siphoning of water out of the
cylinder or boiler in case the supply pipe gets accidentally stopped.
In carrying my invention into effect, the plan I prefer is to lead the supply pipe
down through the circulating cylinder to near the bottom thereof. In this pipe, at
or near the top of the circulating chamber, I form a small hole. The result is that
if water is siphoned out of the cylinder or boiler, the level of the water will by
degrees fall below this hole in the supply pipe, and immediately the level of the
water is below the hole, air will pass into the pipe and the siphon will be at once
broken and thus all danger is obviated.
In another arrangement I carry the supply pipe down to the bottom of the
cylinder and there (or at any other suitable part within the cylinder) provide a valve
which will remain freely open under normal conditions, but immediately the supply
is stopped and water is drawn from the cylinder or hoiler, this valve will close
automatically, thus preventing the water being drawn off.
It will be obvious that in any of these arrangements the supply pipe may be
carried direct to the boiler instead of to the circulating cylinder.
Dated this 29th day of January 1896.
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Patent Agents for the Applicant.
Improvements in or relating to Water Heating and Circulating
Apparatus for Domestic or other Purposes.
I, WILLIAM JAMES WOOSEY, of 40, Norton Street, Liverpool, in the County
of Lancaster, Plumber, 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 water heating apparatus of that kind in which there is

page_text: a boiler and a circulating cylinder placed within the circuit of the pipes. In
apparatus of this kind, the cold water supply pipe, which leads from the tank to the
circulating cylinder and to the cold water service taps of the house, is liable some-
times to be stopped, for example, in cases where there is only an intermittent supply,
or through frost or other cause. In such case if cold water is drawn through the
service taps from the supply pipe, the cold water being cut off, the probabilities are
that the water will be siphoned out of the circulating cylinder or boiler, without
the user having knowledge that anything is wrong, and the consequence is that in
course of time the cylinder and boiler will be completely emptiel and a serious
burst or collapse of the cylinder will probably ensue.
Now my invention is designed to prevent this siphoning of water out of the
cylinder or boiler in case the supply pipe gets accidentally stopped.
In the accompanying drawings:-
Figure 1 shows my invention applied to a domestic water heating and circulating
apparatus;
Figure 2 is a detail view of the dip tube;
Figure 3 a modification; and
Figure 4 a detail view thereof.
In Figures 1 and 2, A is the cylinder, B the circulating pipes to and from the
boiler, C the cold water supply pipe to cylinder and house, D the hot water delivery
pipe, and D' the expansion or steam pipe. The cold supply to the cylinder is led
by a pipe E branched from C down through the circulating cylinder to near the
botton thereof, and in this pipe E at or near the top of the inside of the cylinder,
1 form one or more small holes F. The result is that when water is siphoned out
of the cylinder or boiler, the level of the water will by degrees fall below these
holes F in the dip tube E, and immediately the level of the water is below these
holes, air will pass into the pipe, the siphon be at once broken and thus all danger
obviated, the air being admitted to the cylinder through the pipe D'. A convenient
way of fastening the dip pipe to the cylinder is shown in Figure 2, in which E is
the dip pipe screwed as shown and G lock nuts for fastening it to the cylinder A.
The invention may be applied to existing cylinders.
In another arrangement, I carry the supply pipe down to near the bottom of the
cylinder and provide it with a valve which will remain freely open under normal
conditions, but immediately the supply is stopped and water is drawn from the
cylinder or boiler, this valve will close automatically, thus preventing the water
being drawn off. In an equivalent arrangement, the supply pipe E is provided (as
set forth in Figures 3 and 4) with a valve H, whose ball, under normal conditions,
rolls by gravity on to its seat h. In this position, with the ball resting on its seat h,
the cold water will be delivered through the dip pipe E to the bottom of the
cylinder, but should the supply be stopped, and water be drawn from the cylinder
through the pipe C by syphonage, so that it falls below the level of the valve H,
the valve will open and air will pass into the pipe, thus breaking the syphon aud
obviating the danger of the cylinder and boiler being emptied.
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 :-
1. The improvement in water heating apparatus of that kind in which there is a
boiler and a circulating cylinder placed within the circuit of the pipes, namely,
leading the cold water supply pipe down through the circulating cylinder or hot
water receptacle to near the bottom thereof, and in forming in this pipe, at or near
the top of the cylinder, one or n:ore small holes, whereby should the water fall
below the level of these holes, air will at once enter into the pipe and the siphon
be broken, substantially as described.
2. The use in combination with heating apparatus of that kind in which there is
a boiler and circulating cylinder placed within the circuit of the pipes, of a feed
water pipe adapted to dip down through the cylinder to near the bottom thereof

page_text: and provided with means substantially as described for admitting air to the cold
water supply pipe when the water in the cylinder falls below a given point for the
purpose specified.
Dated this 27th day of August 1896.
WM. P. THOMPSON & Co.,
Of Liverpool, Manchester, Birmingham, and London, Patent Agents.