INVENTION AND METHOD OF WARMING ROOMS AND BUILDINGS WITH HOT AIR OF A MORE PURE QUALITY THAN HAS HITHERTO BEEN USED
Year: 1793

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOSEPH
GREEN, of West Hill, in the Parish of Wandsworth, in the County of Surrey,
Gentleman, send greeting.
WHEREAS His present Majesty, in and by His certain Letters Patent
under the Great Seal of Great Britain, bearing date at Westminster, the
Ninth day of December, in the thirty-fourth year of His reign, did, of Ilis
especial grace,. certain knowledge, and meer motion, for Himself, His heirs
and successors, give and grant unto me, the said Joseph Green, my executors.
aditiors, and assigns, especial lisence, full power, sole priviledge and authority,
that I, the said Joseph Green, my executors, adññiors, and assigns, and every
of them, by myself and themselves, or by my and their deputy or deputies,
servants or agents, or such others as I, the said Joseph Green, my executors,
adñmors, or assigns, should at any time agree with, and no others, from time
to time and at all times thereafter during the term of years therein expressed,
should and lawfully might make, use, exercise, and vend my "INVENTION
AND METHOD OF WARMING ROOMS AND BUILDINGS WITH HOT AIR OF A MORE
PURE QUALITY THAN HAS HITHERTO BEEN USED," within that part of the Kingdom
of Great Britian called England, the Dominion of Wales, and Town of
Berwick-upon-Tweed, in such manner as to me, the said Joseph Green, my
executors, admiors, and assigns, or any of them, should seem meet, and that I,
the said Joseph Green, my executors, admiors, and assigns, should and lawfully
have and enjoy the whole profit, benefit, commodity, and advantage from time
to time coming, growing, accruing and arising by reason of the said Invention,

page_text: for and during the term of years therein mentioned; to hold, exercise, and enjoy
the said licence, powers, priviledges, and advantages therein-before granted or
mentioned to be granted unto me, the said Joseph Green, my exors, aditiors,
and assigns, for and during and unto the full end and term of fourteen years
from the date of the said Letters Patent next and immediately ensuing, and
fully to be compleat and ended according to the Statute in such case mado
and provided; in which said Letters Patent is contained a proviso that the
same should be void unless I, the said Joseph Green, should particularly
describe and ascertain the nature of the said Invention, and in what manner
the same is to be performed, by an instrument in writing under my hand
and seal, and cause the same to be inrolled in the High Court of Chancery
within one calendar month next and immediately after the date of the said
Letters Patent.
NOW KNOW YE, that I, the said Joseph Green, in pursuance of and
in compliance with the said proviso in the said Letters Patent, do hereby
describe and ascertain the nature of the said Invention, and in what manner
the same is to be performed as follows (that is to say) :—
The principal on which my Invention is founded is, the heating air for the
purpose of warming buildings by means of hollow vessels or pipes immersed
in hot water or steam, whereby too great a degree of heat is avoided, and the air
remains unburnt and fit for respiration; and I provide a boiler made of iron,
copper, or other fit materials, with a cover fastened thereto. Within the
boiler I fix a hollow vessel or worm, and sometinies several such vessels or
worms, made of lead, copper, earthenware, or other proper materials; and into
each of these hollow vessels or worms I introduce the external or open air
by the medium of a pipe which I make to pass through a convenient part of the
boiler, firmly soldered or cemented to it, and which pipo I communicate with
the said vessels or worms. The boiler may be fixed in the ordinary manner
in any of the lower apartments or other convenient part of the house or
buildings, or it may be fixed behind a stove or grate so as to be heated by
means of a common fire in any of the rooms, and the size of it should be
regulated by the extent of the building proposed to be warmed from the
hollow vessels or worms above mentioned. Pipes of any of the above-men-
tioned materials are fixed and carried in the most convenient manner to the
different rooms or parts of the buildings to which the warm air is to be
conveyed. To these pipes are fixed cocks or sliders, in order to admit or
prevent the introduction of the warm air into any particular room or place,
and in some convenient part of tho pipes I place a snifting valve or self-acting
cock to prevent the bursting of the boiler or pipes by the force of the steam.

page_text: The boiler being in part filled with water, a fire is lighted in the furnace and
the water made to boil, or brought to such a degree of heat as may be found
necessary. By this heat the air contained in the hollow vessels or worms
before mentioned being rarified and warmed, will ascend, and is to be
admitted by means of the above-mentioned cocks or sliders, or by any other
convenient mode, into the several apartments to be warmed. When the
rooms are at too great a distance from the boiler to be warmed by single.
pipes, then, in order to prolong the duration of the heat, I either inclose the
pipes through which the warm air is conveyed in larger pipes, to which the
steam rises from the boiler, or I introduce the warm air into the larger and
the steam into the smaller pipes, by which means the air pipes are prevented
from growing cool so soon as they would do if they were exposed to the action
of the open air. I also in certain cases, where I judge it proper and more
convenient, place my air vessel or worm in a vessel distinct from the boiler,
but still having a communication therewith for the steam from the boiler to
pass, and thus heat the air vessel or worm by means of steam only. By the
above process too great a degree of heat is avoided, and the air remains
unburnt and fit for respiration.
In witness whereof, I, the said Joseph Green, have hereunto set my
band and seal, this Seventh day of January, in the year of our Lord
One thousand seven hundred and ninety-four.
JOSEPH GREEN. (L.s.)
AND BE IT REMEMBRED, that on the Seventh day of January, in the
year of our Lord 1794, the aforesaid Joseph Green caine before our said
Lord the King in His Chancery, and acknowledged the Specification aforesaid,
and all and every thing therein contained and specified, in form above written.
And also the Specification aforesaid was stampt according to the tenor of the
Statutes made for that purpose.
Inrolled the Eighth day of January, in the year of our Lord One
thousand seven hundred and ninety-four.