Improved Non-conducting Composition for Retarding the Radiation of Heat from Boilers, Pipes, Cylinders, or other Heating Apparatus.
Year: 1893

page_text: Date of Application, 17th Feb., 1893
Complete Specification Left, 9th Oct., 1893-Accepted, 11th Nov., 1893
PROVISIONAL SPECIFICATION.
[Communicated from abroad by WILLIAM DON and THOMAS WATSON, both of
135, Canning Street, Calcutta, Engineers.]
.
Improved Non-conducting Composition for Retarding the Radiation
of Heat from Boilers, Pipes, Cylinders, or other Heating
Apparatus.
I, GEORGE CAMERON DOUGLAS, of 41 Reform Street, Dundee, in the County
of Forfar, N.B. Engineer and Patent Agent, do hereby declare the nature of this
invention to be as follows:-
This invention has for its object the preparation of a composition or compound;
for use as a coating or covering for land or marine boilers, steam pipes, cylinders,
or other heating apparatus, which has been found to effect a considerably greater
saving of coal than has hitherto been the case. Experimental tests have been
made showing that while existing methods have reduced the consumption of fuel
by about twenty five per centum, the use of the composition prepared as set forth
in this Specification has resulted in the saving of such fuel by about fifty per
centum, thus conclusively proving its superiority over other compositions having
the like end in view.
In carrying out my invention, I employ a mixture of pulverized mica, animal
carbon, fibre, and glutinous matter. After being reduced to a powder by any
suitable means, the mica is mixed with bone dust (raw or calcined), hair or
vegetable fibre, and the waste from rice, flour, or oil mills, in the undernoted
proportions :-
The whole is then mixed with water in a manner similar to that used in mixing
cement or plaster, then formed into cakes or blocks and dried for purposes of
transport or storage. In other cases it may be put up loose in bags or casks.
When required for use, such cakes or blocks are broken up and again mixed with
water sufficient to give it the required consistency. Such composition may be
applied to boilers and the like when under steam or otherwise, that is to say
when they are either hot or cold, and it may be in colour a light brown or grey.
The proportions as hereinbefore given are those which appear to give the
best results, but I do not confine myself to such, which may be varied to suit
circumstances.
Dated this 14th day of February 1893.
GEO. C. DOUGLAS & Co.,
41, Reform Street, Dundee, Agents for Applicant.

page_text: COMPLETE SPECIFICATION.
Improved Non-conducting Composition for Retarding the Radiation
of Heat from Boilers, Pipes, Cylinders, or other Heating
Apparatus.
I, GEORGE CAMERON DOUGLAS, of 41 Reform Street, Dundee, in the County
of Forfar, N.B. Engineer and Patent Agent, 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 :-
This invention has for its object the preparation of a composition or compound;
for use as a coating or covering for land or marine boilers, steam pipes, cylinders,
or other heating apparatus, which has been found to effect a considerably greater
saving of coal than has hitherto been the case. Experimental tests have been
made showing that while existing methods have reduced the consumption of fuel
considerably, the use of the composition prepared as set forth in this Specification
has resulted in the saving of such fuel in a much greater degree, thus conclusively
proving its superiority over other compositions having the like end in view.
In carrying out my invention, I employ a mixture of pulverized mica, carbon,
fibre, and glutinous matter. After being reduced to a powder by any suitable
means, the mica may be mixed with bone dust (raw or calcined), hair or vegetable
fibre, and the waste from rice, flour, or oil mills, in the undernoted proportions :-
The whole is then mixed with water in a manner similar to that used in mixing
cement or plaster, then formed into cakes or blocks and dried for purposes of
transport or storage. In other cases it may be put up loose in bags or casks, that
is to say, it may be stored loose before being mixed with water and formed into
cakes. When required for use, such cakes or blocks are broken up and again
mixed with water sufficient to give it the required consistency. Such composition
may be applied to boilers and the like when under steam or otherwise, that is to say
when they are either hot or cold, and it may be in colour a light brown or grey.
The proportions as herein before given are those which appear to give the
best results, but I do not confine myself to such, which may be varied to suit
circumstances.
Having now particularly described and ascertained the nature of my said invent
tion and in what manner the same is to be performed, I declare that what I
claim is :-
-
In a composition or compound used to retard the radiation of heat :-
1. The use of mica, in combination with any suitable known substance or
substanesa

page_text: 2. The combination of mica with bone dust, fibre, and glutinous matter in the
proportions given, as hereinbefore described.
3. The combination of mica with carbon from gas retorts, wood carbon and
glutinous matter in the proportions given, as described.
Dated this 30th day of September 1893.
GEO. C. DOUGLAS & Co.,
41, Reform Street, Dundee, Agents for Applicant.