An Improved Composition for Covering Steam Boilers, Steam and other Pipes and Vessels or Chambers, and for Use in the Construction of Refrigerating and Cooling Chambers.
Year: 1896

page_text: Date of Application, 10th Aug., 1896-Accepted, 12th Sept., 1896
COMPLETE SPECIFICATION.
An Improved Composition for Covering Steam Boilers, Steam and
other Pipes and Vessels or Chambers, and for Use in the
Construction of Refrigerating and Cooling Chambers.
We, GEORGE HUTCHINSON, of Montague House, Wells Road, Knowle, Bristol,
Chemist, and THOMAS HERBERT LAWSON and ARTHUR JOHN LAWSON, both of Marsh
Soap Works, Silverthorne Lane, Bristol, Soap Manufacturers, 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 consists in a composition for covering steam boilers, steam and
other pipes and vessels or chambers, and for use in the construction of refrigerating
and cooling chambers. It is also applicable for keeping iron buildings cool.
In its application to steam boilers, steam pipes and heated chambers, conduits and
vessels generally, the composition which constitutes this invention, serves to lessen
loss of heat by radiation.
As applied in the construction of refrigerating and cooling chambers and to iron
buildings, the composition serves to promote lowness of temperature by assisting
to exclude heat.
"
The composition, which may be manufactured either by a "wet" or a "dry"
process, consists of the following ingredients, viz. :-oak bark, or other like hark of
similar nature; pulp of paper, wood, esparto grass, or the like; and pugged clay,
or, instead of the latter, Portland cement or concrete.
According to the "wet" process of manufacture of the composition, the pugged
clay or cement or concrete, in an approximate proportion of 27 per cent., is mixed
with, approximately, 40 per cent. of paper pulp, or wood pulp, or esparto grass
pulp, or such like pulp.
Mixing is effected in a mill or like appliance; water being added as may be
required.
To the mixture, while still in the mixer, is added approximately, 33 per cent. of
bark which has been previously shred in a disintegrator or heckling machine and
thus combed or beaten to a fibrons state. The whole of the bark is not put into the
mill at once, but in instalments from time to time.
Water is added in such quantities as may be desirable to make the mixture of a
proper, that is to say, plastic consistency. The mixture on arriving at a plastic
condition is ready for use and is applied as a covering paste to boilers, pipes and
other vessels, chambers or structures as aforesaid.
According to the "dry" process of manufacture, the clay, or, instead thereof, the
cement or concrete, is first dried. The pulp is also dried and these ingredients, with
the treated bark, are ground together in a grinding mill.
To enable the ground mixture to be applied as a paste, water is mixed with it
prior to use and the composition thus brought to a pasty or plastic consistency fitting
it for handling and application as a paste.
Whether manufactured by either the "wet" or "dry" process, the composition is,
in its use in the construction of refrigerating or cooling chambers and other structures,
plastered either on the interior or exterior, or is placed between other materials
usually employed in building such chambers.

page_text: Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what
we claim is
A composition for covering steam boilers, steam and other pipes and vessels or
chambers, and for use in the construction of refrigerating and cooling chambers and
other structures; said composition consisting of approximately 27 per cent. of clay,
or Portland cement or concrete; approximately, 40 per cent. of pulp of paper, wood,
or esparto grass or the like, and, approximately, 38 per cent. of shredded oak or
other like bark, mixed together substantially as and by either of the methods
hereinabove described, or by other like or analogous mode.
Dated this 8th day of August 1896.
NICHOLAS WATTS,
Bristol, Chartered Patent Agent.