, and other Objects.
Year: 1885

page_text: Pipes, and other Objects.
I, HERBERT JOHN ALLISON, of the firm of Allison Brothers, of 52 Chancery
Lane, London, in the County of Middlesex, Patent Agents, do hereby declare the
nature of said invention for "AN IMPROVED SUBSTANCE FOR LINING OR COVERING
to be as follows:-
STEAM BOILERS, PIPES, AND OTHER OBJECTS
"
In order that the lining or covering, which is intended to prevent loss of heat in
steam boilers, pipes, and other objects, may give a satisfactory and economical
result in practice, the material used for such lining or covering must not only be a
good non-conductor of heat, but it must also be light and cheap, incombustible, and
insoluble either in boiling or in cold water, and above all it must not have an
injurious effect on the metal which it covers.
The substance hereinafter described fulfils the above requirements. It consists of
sawdust, chopped straw, cork, bark, or some similar light substance, which is mixed
with soluble glass and chalk or lime in a pulverised state, the whole being
carefully and thoroughly mixed. The mixture thus obtained is formed into pieces,
adapted to the article it is intended to line or cover, and is then exposed to the
action of boiling in a solution of chloride of calcium, chloride of magnesium, chloride
of barium or sulphate of alumina, such boiling being continued until the substance
is thoroughly impregnated with these chemical agents. It is then washed in boiling
water in order to remove from it all soluble salts which may have formed during
the process of preparation, and the substance is then ready for use and possesses
the qualities herein before mentioned.
It may be further mentioned as a special advantage, that this substance is
incombustible.

page_text: An Improved Substance for Lining or Covering Steam Boilers,
Pipes, and other Objects.
I, HERBERT JOHN ALLISON, of the firm of Allison Brothers, of 52 Chancery
Lane, London, in the County of Middlesex, Patent Agents, do hereby declare the
nature of said invention for "AN IMPROVED SUBSTANCE FOR LINING OR COVERING
STEAM BOILERS, PIPES, AND OTHER OBJECTS," and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement
In order that the lining or covering, which is intended to prevent loss of heat
in steam boilers, pipes, and other objects, may give a satisfactory and economical
result in practice, the material used for such lining or covering must not only be a
good non-conductor of heat, but it must also be light and cheap, incombustible, and
insoluble either in boiling or in cold water, and above all it must not have an
injurious effect on the metal which it covers.
The substance hereinafter described fulfils the above requirements. It consists
of sawdust, chopped straw, cork, bark, or some similar light substance, which is
mixed with soluble glass and chalk or lime in a pulverized state, the whole being
carefully and thoroughly mixed. The mixture thus obtained is formed into pieces,
adapted to the article it is. intended to line or cover, and is then exposed to the
action of boiling in a solution of chloride of calcium, chloride of magnesium,
chloride of barium, or sulphate of alumina, such boiling being continued until the
substance is thoroughly impregnated with these chemical agents. It is then washed
in boiling water in order to remove from it all soluble salts which may have formed
during the process of preparation, and the substance is then ready for use and
possesses the qualities bereinbefore mentioned.
It may be further mentioned as a special advantage that this substance is
incombustible.
Having now particularly described and ascertained the nature of my said
Invention, and in what manner the same is to be performed, declare that what
I claim is
ri.
The preparation of a substance for lining or covering steam boilers, pipes, and.
other objects, essentially' as above described, from sawdust, chopped straw, cork,
bark, or similar materials, mixed with soluble glass, chalk, or lime, the mixture
thus formed being boiled in chloride of calcium, chloride of magnesium, chloride of
barium, or sulphate of alumina, and then finally washed in boiling water.
Dated this 18th day of August 1885.