IMPROVEMENTS IN APPARATUS FOR HEATING AIR BY MEANS OF STEAM
Year: 1854

page_text: LETTERS PATENT to William Symington, of King William Street, in
the City of London, for the Invention of "IMPROVEMENTS IN APPARATUS
FOR HEATING AIR BY MEANS OF STEAM."
Scaled the 2nd February 1855, and dated the 30th August 1854.
PROVISIONAL SPECIFICATION left by the said William Symington at
the Office of the Commissioners of Patents, with his Petition, on the
30th August 1854.
1, WILLIAM SYMINGTON, of King William Street, in the City of London, do
hereby declare the nature of the Invention for "IMPROVEMENTS IN APPARATUS
FOR HEATING AIR DY MEANS OF STEAM" to be as follows:-
This apparatus consists of two hollow chambers (by preference of wrought
iron). Each chamber may be made of two parts bolted and screwed together.
These two hollow chambers are connected together by numerous tubes (by
preference of welded or gas iron tubing), fastened with nuts and screws and
made steam proof; hence, when steam is admitted into one of the hollow
chambers, it will pervade the whole apparatus, and thus offer very extensive
and safe heating surfaces. This apparatus is enclosed in a casing or covering,
which may be of wood, or other material being a non-conductor of heat; and,
when a higher temperature should be required than could be readily gained by
the direct or uninterrupted passage of air over these pipes, a partition or

page_text: partitions dividing this chamber into two or more parts may be so placed, that
air, when forced into the one compartment, by means of a fan or other suitable
blowing apparatus, will pass over and amongst, and be heated by, the steam
pipes in such compartment; and the air, when it arrives beyond the end of the
partition, will pass into the other compartment or compartments, as the case
may be, and be further heated by the steam pipes in such other compartment
or compartments; and when the air shall have passed over or amongst all the
steam pipes, tho heated air is conducted by suitable channels or pipes to tho
place or places where it is to be-used and dispelled. By such means the risk
and danger of collapsing or twisting of the ordinary wrought-iron steam chests
or pipes or cylinders are avoided, greater durability and facility of repair, and
the exterior casing or covering to confine the air not being subjected to the
pressure of steam, and consequently may be made of wood or other material
which will not readily-conduct the heat of the interior of such chamber
out of it.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said William Symington in the Great Seal Patent Office on t
24th February 1855.
the
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
SYMINGTON, of King William Street, in the City of London, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Thirtieth day of August, in the year of our Lord
One thousand eight hundred and fifty-four, in the eighteenth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said William Symington, Her special licence that I, the said William
Symington, my executors, administrators, and assigns, or such others as I,
the said William Symington, 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
aud Ireland, the Channel Islands, and Isle of Man, an Invention for "Im-
PROVEMENTS IN APPARATUS FOR HEATING AIR BY MEANS OF STEAM," upon the con-
dition (amongst others) that I, the said William Symington, by an instrument
in writing under my hand and seal, 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 Office

page_text: within six calendar months next and immediately after the date of the said
Letters Patent.
NOW KNOW YE, that I, the said William Symington, do hereby declare
the nature of the said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement thereof (that is to say):-
This apparatus consists of two hollow chambers (by preference of wrought
iron). Each chamber may be made of two parts bolted and screwed together.
These two hollow chambers are connected together by numerous tubes (by
preference of welded or gas iron tubing), fastened with nuts and screws and
made steam proof; hence, when steam is admitted into one of the hollow
chambers, it will pervade the whole apparatus, and thus offer very extensive
and safe heating surfaces. This apparatus is enclosed in a casing or covering,
which may be of wood or other material being a non-conductor of heat; and,
when a higher temperature should be required than could be readily gained by
the direct or uninterrupted passage of air over these pipes, a partition or
partitions dividing this chamber into two or more parts may be so placed, that
air, when forced into the one compartment, by means of a fan or other suitable
blowing apparatus, will pass over and amongst, and be heated by, the steam
pipes in such compartment, and the air, when it arrives beyond the end of the
partition, will pass into the other compartment or compartments, as the case
may be, and be further beated by the steam pipes in such other compartment
or compartments; and when the air shall have passed over or amongst all tho
steain pipes, the heated air is conducted by suitable channels or pipes to
the place or places where it is to be used and dispelled. By such means
the risk and danger of collapsing or bursting of the ordinary wrought-iron
steam chests or pipes or cylinders are avoided, greater durability and facility of
repair, and the exterior casing or covering to confine the air not being sub-
jected to the pressure of steam, and consequently may be made of wood or .
other material which will not readily conduct the heat of the interior of such

page_text: an impelled current of air, which becomes heated as it passes around and along
the tubes C, in the direction of the arrows; H, division plates which direct
the course of the air; I, channel which conveys the heated air to the drying
room or compartments; J, pipe which carries off the condensed steam. This
arrangement admits of economy of construction, combined with durability and
strength, whereby both bursting and collapsing are obviated.
In witness whereof, I, the said William Symington, have hereunto set my
hand and seal, this Twenty-second day of February, in the year of
our Lord One thousand eight hundred and fifty-five.
WILLIAM SYMINGTON. (L.B.)
Witness,
JOHN EMPEROR,
of 55, King William Street, City.