Improvements in the Manufacture of Felt by Means of a Fire- proofing Mixture, also Applicable for Coating Roofs and other Structures.
Year: 1889

page_text: Date of Application, 11th July, 1889
Complete Specification Left, 26th Sept., 1889-Accep ed, 22nd Mar., 1890
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Felt by Means of a Fire-
proofing Mixture, also Applicable for Coating Roofs and other
Structures.
We GEORGE ROGERS and JOHN ROGERS, of Middlepath Street, Ballymacarrett in
the County of Down in Ireland, Felt Manufacturer, do hereby declare the nature of
this invention to be as follows:-
The object of our invention is to produce a fire proof felt for covering roofs and
other purposes by the use of a mixture which may also be applied to the coating of
felt or wooden roofs and other similar structures or purposes whereby the same are
rendered uninflammable.
For this purpose we prepare a mixture of melting pitch and terra alba, well stirred
together and we then stir in some washing soda, after which we add about an
equal quantity of salt. We reduce the mixture while still hot to the consistency
necessary for the manufacture of felt by the addition of coal tar and apply it to
the other materials employed in such manufacture as a substitute for ordinary tar
and pitch.
When intended to be employed for the coating of felt or wooden roofs and other
similar structures or purposes we allow the mixture to cool down and melt it again for
application.
1
1001 L
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T
HYNDMAN & DICKSON,
6, Waring Street, Belfast, Agents for Applicants.
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Felt by Means of a Fire-
proofing Mixture, also Applicable for Coating Roofs and other
Structures.
We GEORGE ROGERS and JOHN ROGERS of Middlepath Street Ballymacarrett in
the County of Down in Ireland Felt. Manufacturer 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 :-
The object of our invention is to produce a Fire proof or Fire resisting and unin-
flammable felt for covering roofs and other purposes by the use of a mixture which
may also be applied to the coating of felt or wooden roofs and other similar
structures or purposes whereby the same are in like manner rendered unin-
flammable.
For this purpose we prepare a mixture of melting pitch with about one third of its
weight of terra alba well stirred together and we next stir in with the mixture so
produced half a pound of soda for each gallon in measure (or its equivalent of fourteen
pounds in weight) of the mixture after which we add salt in quantity about equal to
the soda.
We reduce the above mixture while still hot to the consistency necessary for the
manufacture of felt by the addition of coal tar and apply it to the other materials
employed in such manufacture as a substitute for ordinary tar and pitch.
When intended to be employed for the coating of felt or wooden roofs and
other similar purposes we allow the mixture as above described to cool down and
melt it again for application reducing it with coal tar to the usual consistency of
varnish.

page_text: For the purpose of reduction to the required consistency we prefer to use coal tar
which has been refined or freed from spirit.
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 :-
1. The use of fire resisting and uninflammable roofing and other similar felts
prepared and employed substantially in the manner and for the purposes herein before
described.
2. The preparation and employment of a fire resisting and uninflammable coating
or varnish substantially in the manner and for the purposes herein before described.
3. The use in the manufacture of roofing and other similar telts of Terra Alba and
unelting pitch prepared compounded and employed substantially in the manner and for
the purposes herein before described.
4. The use in the construction of wooden or felt covered roofs and other similar
structures of a coating or varnish prepared compounded and employed substantially
in the manner and for the purposes hereinbefore described and
5. The combination and arrangement of materials or substances constituting my
improved fire resisting and uninflammable felt and varnish prepared compounded
and employed substantially in the manner and for the purposes hereinbefore
described.
Dated this 24th day of September 1889.
HYNDMAN & DICKSON,
64, Waring Street, Belfast, Agents for Applicants.