Improved Compositions for Preventing the Radiation or Transmission of Heat.
Year: 1893

page_text: Date of Application, 25th Feb., 1893-Accepted 1st Apr.. 1893
COMPLETE SPECIFICATION.
Improved Compositions for Preventing the Radiation or
Transmission of Heat.
I JOHN ALEXANDER HENDERSON of Guild Street Buildings Aberdeen North
Britain Merchant do hereby declare the nature of this invention and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
-
My invention relates to improved compositions for preventing the radiation or
transmission of heat, especially suitable as lagging for steam boilers and cylinders;
steam and hot water pipes and other surfaces from which it is desired to prevent
the radiation of heat, also as a covering for protecting water pipes and the like
from frost, and as a lining for buildings and other structures exposed to cold winds.
The invention consists of combinations of ingredients forming when thoroughly
mixed as hereafter described plastic compounds which when applied to the
surface from or to which the transmission of heat is to be prevented set in the form
of tenaciously adherent coatings possessing non-conductive properties in a high
degree and which are far more efficacious for preventing the transmission of heat
than any other cements or coverings heretofore employed.
The improved non-conducting composition (No. 1) is composed essentially of
ordinary stucco cement with the admixture of ground cork and jute or other fibre,
the ground cork and fibre having previously been rendered practically non-com-
bustible by boiling for from say ten to sixty minutes in a saturated solution of
alum, or ferric acid or a ferric compound or silicate of soda or sodium tungstate or
other sodium compound possessing like properties usually employed for rendering
fabrics non-inflammable."
The ingredients of this composition are used in about the undermentioned
proportions which I find give good results in practice, but I would have it under-
stood that I do not limit myself strictly thereto as the same may be varied within
certain limits according to the intended application of the composition and the
qualities which it is required to possess. For example-By increasing the propor-
tion of the cork the capacity of the composition to resist the transmission of heat
would be increased but at some loss as regards cohesion and hardness.
The undermentioned proportions are suitable for covering steam boilers cylinders
and pipes viz. :—
Stucco cement -
Ground cork (prepared as before mentioned)
Jute or other fibre
Water-
3 do.
12 parts by weight
do.
do.
do.
-
4 do.
do.
The improved non-conducting composition (No. 2.) is composed of ground cork
and fibre prepared as before described and mixed with an adhesive preparation
composed of the following ingredients
Alum
Wheat flour
Water
-
-
2
ounces
quartern
gallon.
The alum and the flour are to be mixed together and the water to be added very
gradually so as to make a thin paste, which is then to be transferred to a steam
heated pan raised rapidly to the boil, and boiled for two or three minutes.

page_text: The undermentioned proportions are suitable for the non-conducting com-
position.
-
Ground cork (prepared as before described)
Jute or other fibre (prepared as before described)
Cement or adhesive preparation (made according
to the foregoing recipe)
-
6 parts by weight
g do.
13 do.
do.
do.
It will be of advantage to apply a very thin coating of ordinary clay or stucco
to boilers before this composition is put on.
The ingredients as above specified and applicable to each separate composition
are to be thoroughly mixed together in a suitable mixing machine or by hand
labor, so that each will form a homogeneous plastic mass which is then to be
applied in the usual manner as a cement to the surface to be protected, and when
set the same constitutes a hard tenacious non-conductive coating.
I would further have it understood that both of the above described composi-
tions may be cast or moulded in the form of semi-circular or other segments
varying in length from say six to eighteen inches and in diameter suited for
application to pipes of from three fourths of an inch to one foot in diameter.
They may also be prepared in the form of slabs or bricks varying from say three
inches to two feet square for application to flat surfaces.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :
The manufacture of the herein described compositions for preventing the radia-
tion or transmission of heat consisting of:-
(a) Stucco cement with the admixture of finely ground cork and jute or other
fibre (which have been previously rendered practically non-combustible) in
about the proportions substantially as herein specified.
(b) Flour cement with the admixture of finely ground cork and jute or other
fibre (which have previously been rendered non-combustible) in about the
proportions substantially as herein specified.
Dated 95th day of ebruary 1902
J. A. HENDERSON,
By A. M. & Wm. Clark,
53, Chancery Lane, London, Chartered Patent Agents.