IMPROVEMENTS, IN APPARATUS FOR HEATING WATER BY MEANS OF WASTE STEAM."
Year: 1864

page_text: LETTERS PATENT to David Brodie, of Paisley, in the County of Renfrew,
North Britain, Brewer, for the Invention of "IMPROVEMENTS, IN APPARATUS
FOR HEATING WATER BY MEANS OF WASTE STEAM."
PROVISIONAL SPECIFICATION left by the said David Brodie at the
Office of the Commissioners of Patents, with his Petition, on the 10th
September 1864.
I, DAVID BRODIE, of Paisley, in. the County of Renfrew, North Britain,
Brewer, do hereby declare the nature of the said Invention for "IMPROVE-
MENTS IN APPARATUS FOR HEATING. WATER BY MEANS OF WASTE STEAM," to be as
follows:-
This Invention has for object the heating of water in an economical
manner by means of steam, which would otherwise be allowed to blow away
wastefully; and the improvements are such as in the case of the waste steam
being from a high pressure.engine to avoid any appreciable back pressure.
In a modification of apparatus embodying the improvements, the waste
steam used is admitted into one side of a chamber or vessel, which is of a
rectangular or other convenient form, and which is fitted with a vertical or
inclined diaphragm pierced with numerous holes. The water to be heated is
first passed through tubes arranged on that side of the perforated diaphragm
at which the steam enters, and is then made to run down the surface of the
diaphragm. The steam blowing through the diaphragm throws the water

page_text: towards the further side of the chamber and towards a series of inclined
shelves, down which the water runs, and is as it were projected off their edges
into the steam again. The steam becomes condensed and the water heated,
the products passing off by a pipe from the bottom of the chamber. The
chamber is fitted with a pair of valves, one oponing inwardly to admit air, and
the other opening outwardly whenever the internal pressuro exceeds a pre-
determined amount to which the valve is loaded, and which need not be at
all large.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filoil
by the said David Brodie in the Great Seal Patent Office on the 27th
February 1865.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, DAVID
BRODIE, of Paisley, in the County of Renfrew, North Britain, Brewer, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Tenth day of September, in the year of our Lord One
thousand eight hundred and sixty-four, in the twenty-eighth year of Her
reign, did, for Herself, Her beirs and successors, givo and grant unto me, the
said David Brodie, Her special licence that I, the said 'David Brodie, my
executors, administrators, and assigns, or such others as I, the said David
Brodie, my executors, administrators, and assigns, should at any time agree
with, and no others, from time to time and at all times thereafter during
the term therein expressed, should and lawfully might make, use, exercise,
and vend, within the United Kingdom of. Great Britain and Ireland, the
Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN
APRARATUS FOR HEATING WATER BY MEANS OF WASTE STEAM," upon the con-
dition (amongst others) that I, the said David Brodie, my executors or
administrators, by an instrument in writing under my, or their, or one of
their hands and seals, should particularly describe and ascertain the nature
of the said Invention, and in what manner the same was to be performed,
and cause the same to be filed in the Great Seal Patent Offico within
six calendar months next and immediately after the date of the said Letters
Patent.
NOW KNOW YE, that I, the said David Brodie, do hereby declare
the nature of my said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the

page_text: following statement in writing, reference being. had to the accompanying
Drawings, and to the letters and figures marked thereon, that is to say:-
My said Invention has for object the heating of water in an economical
manner by means of steam, which would otherwise be allowed to blow away
wastefully; and my improvements are such as in the case of the waste
steam being from a high-pressure engine to avoid any appreciable back
pressure.
And in order that my said Invention and the manner of performing the
same may be properly understood, I have hereunto appended a Sheet of
explanatory Drawings, to be herein-after referred to, and representing a modi-
fication of apparatus embodying my improvements.
Figure 1 is an elevation of the apparatus with one side removed; Figure 2
is a horizontal section, and Figure 3 is a vertical section as at right angles to
Figure 1. In this example the apparatus consists of and is contained in a
plain rectangular casing 1, 2, which may be of cast iron or other convenient
metal. The casing forms internally a chamber, into which the waste steam
used is admitted by a branch pipe 3 at one side, and towards the other side
there is fitted in the chamber a diaphragm 4, pierced with numerous holes,
and which may be either vertical as shown, or more or less inclined. The
water to be heated enters by a branch pipe 5 into a compartment 6, formed
in the top of the casing, and from this compartment it descends and ascends
through a number of bent tubes 7, which dip down into the compartment 8,
into which the steam first enters. The water having taken up some heat in
passing through the tubes 7, rises into a compartment 9 at the top, from
which it overflows, and thence runs down the surface of the perforated
diaphragm 4. The steam blowing through the diaphragm 4 throws the
water towards the further side 2 of the chamber, and towards a series of
shelves 10, from which the water runs, being as it were projected off their
edges upon the diaphragın or into the steam again. By these means the
steam becomes condensed and the water heated, the hot water passing off by
a pipe 11 from the bottom of the chamber. In the example delineated any
steam which is not condensed after passing through the diaphragm has free
egress to the atmosphere by the top of the casing, but if it is wished, the
casing may be closed and be fitted with a pair of valves, one opening inwardly
to admit air, and the other opening outwardly whenever the internal pressure
exceeds a predetermined amount to which the valve is loaded, and which need
not be at all large.
Apparatus of the size of the example represented in the Drawings is
capable of condensing the steam of a high-pressure engine of two horses'

page_text: power nominal working, with a boiler pressure of twenty pounds per square
inch, the water heated thereby being one hundred gallons per hour, from a
temperature of fifty-nino degrees to ono;hundred and seventy degrees Fahren-
heit. To condense and heat other quantities tho apparatus must be made
proportionally larger or smaller.
Having thus particularly described my said Invention, and the manner in
which the same is or may be performed, I have to state that I do not restrict
myself to the precise details herein described or delineated; but that what I
believe to bo novel and original, and claim as the Invention secured to me by
the herein-before in part recited Letters Patent, is, the combining or arranging.
together of tubes and porforated diaphragms for heating water by means of
waste steam substantially in the manner herein described and delineated.
In witness whereof, I, the said David Brodie, have hereunto set my
hand and seal, this Sixth day of February, in the year of our Lord
One thousand eight hundred and sixty-five.
Witness,
EDMUND HUNT,
Patent Agent,
28, St. Enoch Square,
Glasgow.
DAVID BRODIE. (L.S.)