Improved Apparatus for Heating Water.
Year: 1889

page_text: Date of Application, 12th Mar., 1889
Complete Specification Left, 24th Sept.. 1889-Accepted, 26th Oct.,
1889
PROVISIONAL SPECIFICATION.
Improved Apparatus for Heating Water.
I, EDMUND ARTHUR NORMAN POCHIN of King's College Cambridge an Under-
graduate of the University of Cambridge do hereby declare the nature of this invention
to be as follows:-
The apparatus consists of a vessel placed above the level of the fire, & away from it,
& containing the water to be heated.
A tube is so bent that its middle portion forms a coil or spiral, which is placed in
the fire, whilst the two ends of the tube dip into the said water. The tube being filled
with water, circulation takes place, the colder water flowing in at one end of the tube,
through the hot coil in the fire, & returning heated to the vessel by the other end of
the tube.
The colder water having a greater specific gravity than the hot, continually displaces
the latter, & thus the circulation is maintained, substantially as above.
E. A. N. POCHIN.
COMPLETE SPECIFICATION.
Improved Apparatus for Heating Water.
I, EDMUND ARTHUR NORMAN POCHIN of King's College, Cambridge, an Under-
graduate of the University of Cambridge, 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 :-
The invention relates to improvements in portable water-heating apparatus designed
to admit of the apparatus being immediately so put in connection with an open vessel
of water near an ordinary fire that the water shall circulate automatically through the
heated apparatus and become heated.
DESCRIPTION OF THE DRAWINGS.
Figure 1 shows a side elevation, and Figure 2 a plan view of apparatus arranged to
carry out my invention.
This consists essentially of a tube a (preferably of copper) bent into the form
indicated, and having an india rubber ball b connected with one leg of the tube in the
manner shown.
The water to be heated is placed in any open vessel, above the level of the fire, and
away from it. The two open ends of the tube c', c² are now immersed in the water,
whilst the spiral a is inserted into the fire between the bars of the grate, or in other
convenient position for the application of heat.
Now let the ball b, or air expeller, be squeezed two or three times, by which
operation the tube will be completely filled with water.
Circulation will now take place, the cold water flowing in at one end of the tube,
through the heated coil and returning heated to the vessel by the other end.
The dotted line ay may indicate the level of water in the vessel.
The circulation takes place in virtue of the cold and heavy water continually dis-
placing the heated and lighter water, and is allowed to continue till the whole mass
of water has reached the required temperature.
I do not restrict myself to the precise construction or materials indicated for the
apparatus to be constructed of, to the form of the coil or spiral a, to the position of
the ball b. The heating of the coil may be effected by any convenient source of
heat.

page_text: 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. An automatically circulating portable water coil adapted to be immediately put
into connection with an open vessel of water without requiring special fittings, by
merely inserting the two open ends of the the tube into the water; constructed or
arranged, substantially as set forth.
2. The combination of a rubber ball, or like air expeller b, with an automatically
circulating portable water coil constructed and operating as set forth so that, by com-
pressing said ball, and allowing it to expand, alternately, the air originally in the tube
is completely expelled, and the whole apparatus filled with water promoting circulation,
as set forth.
Dated the 24th day of September 1889.
WM. BROOKES & SON,
55 & 56, Chancery Lane, London, Agents.