AN IMPROVED MODE OF PREVENTING THE RADIATION OF HEAT PROM STEAM BOILERS
Year: 1869

page_text: LETTERS PATENT to Alfred Vincent Newton, of the Office for Patents,
66, Chancery Lane, in the County of Middlesex, Mechanical
Draughtsman, for the Invention of "AN IMPROVED MODE OF PREVENTING
THE RADIATION OF HEAT PROM STEAM BOILERS."-A communication from
abroad by Charles M. O'Hara, of the City and State of New York,
United States of America
PROVISIONAL SPECIFICATION left by the said Alfred Vincent Newton
at the Office of the Commissioners of Patents, with his Petition,
on the 7th September 1869.
I, ALFRED VINCENT NEWTON, of the Office for Patents, 66, Chancery
Lane, in the County of Middlesex, Mechanical Draughtsman, do hereby
declare the nature of the said Invention for "AN IMPROVED MODE OF
PREVENTING THE RADIATION OF HEAT FROM STEAM BOILERS," to be as
follows:-
This Invention relates to the application of ashes produced from coal,
wood, or other vegetable matter as a packing for the outside surfaces of

page_text: steam boilers for the purpose of more effectually retaining heat therein.
The mode of effecting this object is by enveloping the surfaces aforesaid
with ashes of any desirable thickness, either in a dry or plastic condition,
and supporting and preserving the same closely and compactly in its
place by means of a covering or jacket of wood, metal, or other suitable
material. As ashes contain strong properties of a non-conductor, the
radiation from heated surfaces protected by them is to a great extent
prevented, and much economy in the consumption of fuel is thereby
attained. Furthermore ashes being more effective as a non-conductor
when divested of all extraneous matter and reduced to an impalpable
powder they may be sifted or ground or prepared by other suitable
means, but such processes are not essential, as ashes may be used for the
purpose aforesaid in a crude state if it should be more convenient to so
apply them.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Alfred Vincent Newton in the Great Seal Patent
Office on the 7th March 1870.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ALFRED
VINCENT NEWTON, of the Office for Patents, 66, Chancery Lane, in
the County of Middlesex, Mechanical Draughtsman, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Seventh day of September, in the year of our
Lord One thousand eight hundred and sixty-nine, in the thirty-third
year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said Alfred Vincent Newton, Her special
licence, that I, the said Alfred Vincent Newton, my executors, adminis-
trators, and assigns, or such others as I, the said Alfred Vincent Newton,
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
"AN IMPROVED MODE OF PREVENTING THE RADIATION OF HEAT FROM STEAM
BOILERS," being a communication to me from abroad by Charles
Murray O'Hara, of the City and State of New York, United States of
America, upon the condition (amongst others) that I, the said Alfred

page_text: Vincent Newton, 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 Office within six calendar
months next and immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Alfred Vincent Newton, 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, reference being had to the Drawing here-
unto annexed, and to the letters and figures marked thereon (that is to
say):
-
This Invention relates to the application of ashes produced from coal
or wood or other vegetable matter as a packing for the outside surfaces
of steam boilers for the purpose of more effectually retaining heat
therein. The mode of effecting this object is by covering the exposed
surfaces aforesaid with an envelope of ashes of any desirable thickness,
the ashes being supported and retained in place by means of a jacket of
wood, metal, or other suitable material in the manner to be presently
described. Ashes, as is well known, form a bad conductor of heat, and
for that reason they are commonly used to damp open fires. The ashes
of which this non-conducting envelope is formed are to be finely sifted
and applied in a thoroughly dry state to the boiler to be protected, as
experiment has demonstrated that the most satisfactory result can only
be obtained by the use of the ashes in a disintegrated state or in the
form of atoms, as in that state they retain a large portion of air, which is
itself an admirable non-conductor of heat. Any junction however
formed between the atoms composing the ashes such as is produced by
working the ashes into a paste will tend to injure the non-conducting
property of the ashes and to a material extent facilitate the conduction
of the heat from the boiler.
In the accompanying Drawing, Fig. 1 is a transverse section of a
horizontal cylindrical boiler set in brickwork, and having an envelope
of ashes applied thereto according to this Invention; and Fig. 2 is a
longitudinal central section of the envelope and flues showing the mode
of covering the crown of the boiler and the exposed portions of the ends
thereof.

page_text: The boiler A is set in any usual or approved manner in the brick-
work B, and over it is placed a segment-shaped cover C formed of sheet
iron. This cover is formed of two or more leaves, which meet at the
centre line of the crown of the boiler, and they are affixed to the furnace
by hinges, as shewn in the Drawing. When the cover is shut a closed
space is formed for the reception of the ashes, which are filled in between
the boiler and cover through openings c provided in the top of the cover
for that purpose. Whenever access is required to the boiler this may be
readily gained by throwing back the leaves, as indicated by dots at
Fig. 1.
Fig. 3 shows in elevation a vertical cylindrical boiler surrounded by
an envelope of ashes according to this Invention. The boiler A is
enveloped in a sheet iron case B, through the top of which the chimney
projects, and the space between the boiler and case is filled with the
finely sifted dry ashes, the same being admitted through an opening c in
the case.
Having now described the nature of the Invention of "An Improved
Mode of Preventing the Radiation of Heat from Steam Boilers," and
explained the manner of carrying the same into effect, I wish it to be
understood that under the above in part recited Letters Patent I claim,
the application of ashes to steam boilers for preventing the radiation
of heat therefrom, substantially in the manner described and illustrated.
In witness whereof, I, the said Alfred Vincent Newton, have
hereunto set my hand and seal, the Seventh day of March,
in the year of our Lord One thousand eight hundred and
seventy.