IMPROVEMENTS IN HEATING AND REGULATING TEMPERATURE
Year: 1850

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN GRANT,
of Hyde Park Street, in the County of Middlesex, send greeting.
WHEREAS Her present most Excellent Majesty Queen Victoria, by Her
Royal Letters Patent under the Great Seal of the United Kingdom of Great
Britain and Ireland, bearing date at Westminster, the Twenty-fourth day of
October (One thousand eight hundred and fifty), in the fourteenth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said John Grant, my exors, adñiors, and assigns, Her especial license, full
power, sole privilege and authority, that I, the said John Grant, my exors,
admors, and assigns, or such others as I, the said John Grant, my exors,"
adiors, or assigns, should at any time agree with, and no others, from time to
time, and at all times during the term of years therein expressed, should and.
lawfully might make, use, exercise, and vend, within England, Wales, and the
Town of Berwick upon Tweed, and in the Islands of Jersey, Guernsey,
Alderney, Sark, and Man, and also in all Her said Majesty's Colonies and
Plantations abroad, my Invention of "IMPROVEMENTS IN HEATING AND REGULATING
TEMPERATURE;" in which said Letters Patent is contained a proviso that I, the
said John Grant, shall cause a particular description of the nature of my said'
Invention, and in what manner the same is to be performed, by an instrument
in writing under my hand and scal, to be inrolled in Her said Majesty's High
Court of Chancery within six calendar months next and immediately after:

page_text: according to my Invention as will enable me to describe my improvements in
heating the water therein, and of obtaining a more regulated temperature of
the furnace by an uniform supply of fuel than heretofore has been obtained.
The form of the boiler to which my. Invention is to be applied may be varied.
a, a, are the fire-bars, which I prefer making in sections for boilers of large
dimensions, making up the conical form of grating shown, and parts supported
by suitable projections b, b, at intervals, leaving space at the outer circumference
to assist the combustion, and for the dust and cinders to fall through. c, c, is
the fuel chamber or shoot, which is to be kept full of fuel, and the same
descending will keep up a regular supply, and by this conical form of grating
be equally distributed upon the fire-bars. d, d, is a flue surrounding the cham-
ber c, c, and the products of combustion pass up from the fire between the
connecting pipes e, e, and thence off to the chimney by a flue or flues f. The
front part of the boiler will be kept off the floor so as to admit a supply of air
below the fire-bars, and to serve as an ash pit arranged for regulating the.
draft; and it is proper to have a sufficient space between the bars for the
purpose of introducing a rake from below up between them. By this arrange-
ment the fire doors heretofore used in boilers will be dispensed with, and the
whole of the fire and chamber leading to it will be surrounded by water, so
that the heat evolved will be taken up by the surrounding water more advan-
tageously than heretofore, when fire doors and furnaces of ordinary construction
are employed. I wish it to be understood that what I claim is, the mode
herein described of applying heat to water or fluids in boilers, and regulating

page_text: the temperature thereof by immersing the furnace for the purpose of heating
liquids either in vessels of iron, wood, or other material.
In witness whereof, I, the said John Grant, have hereunto set my hand
and seal, this Tenth day of April, in the year of our Lord One
thousand eight hundred and fifty-one.
Enrolled the Twenty-fourth day of April, in the year of our Lord One
thousand eight hundred and fifty-one.