IMPROVEMENTS IN APPARATUS FOR HEATING WATER BY MEANS OF GAS
Year: 1884

page_text: I, THOMAS FLETCHER of Thynne Street, Warrington in the county of Lancaster
Gas Engineer do hereby declare the nature of my invention for "IMPROVEMENTS
IN APPARATUS FOR HEATING WATER BY MEANS OF GAS" to be as follows:
These Improvements relate to the construction of apparatus for heating Water
by bringing it into actual contact with the heated products of the combustion of
gas and consist in the combination of a water jet or jets a shallow circular tray and
an annular water space contained within a suitable casing in the bottom of which
an opening is formed for the admission of the heated products of combustion from
the gas burner placed below the apparatus With the water jet or jets circular tray
and casing there may also be combined a water strainer or filter and a dash plate
as hereinafter described.
In carrying out these Improvements I construct a casing of cylindrical or other
convenient form having single or double walls of metal or other suitable material.
When the use of a dash plate is advisable as for example when a jet with a single
central orifice is employed I suspend or attach it immediately below the top of the
casing. The dash plate is by preference circular on plan dished and fixed with its
convex surface downwards. The water jet or jets are placed approximately central
or concentric within the casing and are connected to the water supply by means
of a suitable tube or pipe within which may be placed a strainer or filter for the
purpose of removing mechanical impurities from the water.
Below the jet or jets I fix a shallow tray and below the tray I form in the
bottom of the casing an annular water space surrounding an opening for the
passage into the apparatus of the products of combustion. This opening must be
of smaller diameter than the tray above it so that no water may fall through the
opening and upon the burner when the apparatus is at work. The annular water
space is provided with an outlet for the delivery of the heated water collected
therein.
The action of the apparatus may be described as follows: The gas in the burner
below the apparatus being lighted and the water turned on the jet or jets of water
striking each other or the dash plate are diffused throughout the interior of the
casing as spray which falling slowly is collected partly in the annular space and
partly in the tray from which it overflows into the annular space.
The only portion of the apparatus exposed to the possible action of the flane or
heated gases being covered on the inner side with water are always maintained at a
lower temperature than that of boiling water and are thus protected from corrosion
local action or injury from the heat.
Dand 1: _L 1
ST1001

page_text: I, THOMAS FLETCHER of Thynne Street Warrington in the County of Lancaster
Gas Engineer do hereby declare the nature of my invention for IMPROVEMENTS
IN APPARATUS FOR HEATING WATER BY MEANS OF GAS and in what manner
the same is to be performed, to be particularly described and ascertained in and by
the following statement:-
These Improvements relate to the construction of apparatus for heating water by
bringing it into actual contact with the heated products of the combustion of gas
and consist in the combination of a water jet or jets, a shallow circular tray and
water space contained within a suitable casing in the bottom of which an opening
is formed for the admission of the heated products of combustion from the gas
burner placed below the apparatus. With the water jet or jets, tray and casing
there may also be combined a water strainer or filter and a dash plate as hereinafter
described.
And in order that this my said Invention may be more readily understood and
carried into practical effect I have hereunto appended a sheet of drawings marked
with letters of reference, similar letters denoting similar parts in each of the
figures.
Fig 1. shows a sectional elevation and Fig 2 a sectional plan of the apparatus
constructed according to these Improvements.
The outer casing A may be cylindrical or of any other convenient form and it
may be formed of a single thickness of metal or other suitable material or it may
be constructed with two shells in which case the space or cavity between the two
shells may he packed with any suitable insulating material such as silicated cotton
wool or felt. When the use of a dash plate is advisable as for example in some
cases where a single jet is employed it may be suspended or attached immediately
below the top of the casing as shown in dotted lines at R Fig 1.
The water jet or jets C are by preference placed approximately central or
concentric with the casing and are connected to the water supply by means of a
suitable tube or pipe L within which may be placed a strainer or filter D for the
purpose of removing matter suspended on or mechanically mixed with the water.
Below the jet or jets is fixed a shallow tray E and below the tray there is formed
in the bottom of the casing an annular water space N surrounding an opening G
for the passage into the apparatus of the products of combustion from the gas
burner J. The opening G should be of smaller diameter than the tray E so that
no water may fall through the opening and upon the burner when the apparatus is
at work The annular space N is provided with an outlet H for the delivery of the
heated water collected therein. The products of combustion are led away from the
apparatus by means of a bent flue or tube B as shown in Fig 1 or when the dash
plate is employed a straight vertical flue or tube may be used having its opening
immediately above the dash plate. The tray E may be suspended by metal straps
M. M. from the outer vessel or casing A. and the casing may be mounted on or
supported by the legs P P¹ or their equivalent so as to leave room for the burner
below the bottom of the vessel.
The action of the apparatus may be described as follows:-The gas supply
having been connected to the nozzle K of the gas burner J. and the water supply
to the nozzle of the jet tube L, the gas being then lighted and the water turned on
the jet or jets of water striking each other, the dash plate or the sides of the
casing, are diffused throughout the interior of the casing as spray which after
falling slowly is collected partly in the annular space N and partly in the tray E

page_text: from which it overflows into the annular space and thence through the discharge
nozzle H The heated gases from the burner passing through the spray, part with
their heat which is taken up by the spray which is further heated on its passage as
water through the tray E and the annular space N.
The only portions of the apparatus exposed to the possible action of the flame or
heated gases being covered on the inner surface with water are always maintained
at a lower temperature than that of boiling water and are thus protected from
corrosive local action or injury from the heat.
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) The combination of the outer vessel A the jet or jets C the tray E and the
annular space N all substantially as and for the purposes hereinbefore set forth and
described and illustrated in the accompanying drawings.
(2) In an apparatus of the type described for heating water by means of gas
the use of the bent flue or tube B substantially as hereinbefore described and set
forth.
(3) In an apparatus of the type described for heating water by means of gas
the use of the strainer or filter D substantially as and for the purpose herein before
described and set forth.
בד.
1001
WILLIAM E. HEYS,
Agent.