AN IMPROVED NON-CONDUCTING COVERING APPLICABLE FOR STEAM BOILERS PREVENTING THE RADIATION OF MAP TOO pn HORN POR PROVISIONAL SPECIFICATION ANDNES, WHICH MAY ALSO BE USED FOR ofat genera
Year: 1873

page_text: LETTERS PATENT to William Stebbins Fish, of Glasgow, in the
County of Lanark, North Britain, Gentleman, for the Invention
of "AN IMPROVED NON-CONDUCTING COVERING APPLICABLE FOR STEAM BOILERS
PREVENTING THE RADIATION OF
MAP
TOO pn HORN POR
PROVISIONAL SPECIFICATION left by the said William Stebbins Fish
at the Office of the Commissioners of Patents, with his Petition,
on the 13th March 1873.
I, WILLIAM STEBBINS FISH, of Glasgow, in the County of Lanark,
North Britain, Gentleman, do hereby declare the nature of the said
Invention of "AN IMPROVED NON-CONDUCTING COVERING APPLICABLE FOR STEAM
BOILERS AND ENGINES, WHICH MAY ALSO BE USED FOR PREVENTING THE RADIATION
of Heat generaLLY," to be as follows, that is to say :-
This Invention, which relates to an improved non-conducting covering

page_text: applicable for steam boilers and engines, and for preventing the radiation
of heat generally, consists in the employment of asbestos or asbestos
admixed with other substances as the material of which such non-con-
ducting covering is composed.
Under one mode of making the improved covering asbestos fibre, or
asbestos reduced to powder or flour, or an admixture of asbestos fibre
and powder or flour of asbestos, is or are commingled with water, so as
to form a paste, pulp, or felt-like substance, which is then applied to
the boiler or other surface.
Under another mode asbestos fibre or flour, or the aforesaid paste, pulp,
or felt of asbestos, may be mixed with farinaceous or glutinous matters or
gums, silicic acid, silicate of soda, or precipitated silica in about the
same proportions, or it may be mixed with ground gypsum, plaster,
lime, or clay, or with all of these substances.
Under another mode the improved non-conducting covering may be
composed of asbestos made into sheets or rolls of paper or millboard, ·|
either alone or mixed with other paper stock, or with hair or coarse
wool, which sheets of paper or millboard are laid on or wrapped round
the boiler or other surface either in one or more layers, as desired.
Under another mode cloth composed wholly of asbestos or of asbestos
admixed with other vegetable or animal fibres or hair may be wrapped
round or laid upon the boiler or other surface from within which it is
desired to prevent the radiation of heat.
SPECIFICATION in pursuance of the conditions of the Letters Patent
filed by the said William Stebbins Fish in the Great Seal Patent 2
Office on the 13th September 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
STEBBINS FISH, of Glasgow, in the County of Lanark, North Britain,
Gentleman, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her 3
Letters Patent, bearing date the Thirteenth day of March, in the year
of our Lord One thousand eight hundred and seventy-three, in the

page_text: 36th year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said William Stebbins Fish, Her special
license that I, the said William Stebbins Fish, my executors, adminis-
trators, and assigns, or such others as I, the said William Stebbins Fish,
my executors, administrators, or 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 NON-CONDUCTING COVERING APPLICABLE FOR STEAM BOILERS AND
ENGINES, WHICH MAY ALSO BE USED FOR PREVENTING THE RADIATION OF HEAT
GENERALLY," upon the condition (amongst others) that I, the said
William Stebbins Fish, 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 within
six calendar months next and immediately after the date of the said

page_text: silicate of soda, or precipitated silica, or it may be mixed with ground
gypsum plaster, lime, or clay, or with all of these substances, or with
alum.
Under another mode of constructing the improved non-conducting
covering it may be composed of asbestos made into sheets or rolls of
paper or millboard either alone or mixed with other paper stock, or with
hair or coarse wool or sawdust, which sheets of paper or millboard are
laid in or wrapped round the boiler or other surface either in one or more
layers, as desired.
Under another mode of employing asbestos or amianthus as a non-
conducting covering it may be used as cloth composed wholly of asbestos
yarn or of asbestos yarn admixed with other vegetable or animal fibres
or hair. The cloth so constructed is or may be wrapped round or laid
upon the boiler or other surface from within which it is desired to
prevent the radiation of heat.
With reference to the proportions of the several materials herein.
before mentioned as mixed or to be mixed with the asbestos or amian-
thus when the said material is used according to the three first heads of
this Invention, it is to be understood that the quantities will vary
according to the quality of the asbestos or amianthus, it being necessary
to use such a quantity of any one or more of the other substances as will
produce together with the asbestos or amianthus the non-conducting
covering in either one of the states set forth. The qualities of asbestos
or amianthus are so variable that it is not possible to set forth any
particular proportions of the several materials herein set forth as mixed;
or to be mixed therewith.
Having now described and particularly ascertained the nature of my
said Invention, and the system, mode, or manner in or under which the
same is or may be used or practically carried into effect, I would observe
in conclusion that what I consider, to be novel and original, and
therefore claim as the Invention secured to me by the herein-before in
part recited Letters Patent is,—
First. The employment of asbestos or amianthus mixed with the other
materials set forth as a non-conducting covering for the purposes

page_text: Second. The employment of cloth composed wholly of asbestos or
amianthus, or wherein asbestos or amianthus is an essential element
as a non-conducting covering for the purposes herein-before mentioned.
In witness whereof, I, the said William Stebbins Fish, have here-
unto set my hand and seal, this Eleventh day of September,
One thousand eight hundred and seventy-three.
WILLIAM STEBBINS FISH. (L.S.)