IMPROVEMENTS IN THE TREATMENT OR PREPARATION OF HAIR FELT, SUCH AS IS USED FOR COVERING STEAM BOILERS,
Year: 1882

page_text: LETTERS PATENT to John Forsyth of Glasgow in the county of Lanark
North Britain for an Invention of "IMPROVEMENTS IN THE TREATMENT OR
PREPARATION OF HAIR FELT, SUCH AS IS USED FOR COVERING STEAM BOILERS,
PROVISIONAL SPECIFICATION left by the said John Forsyth at the Office
of the Commissioners of Patents on the 22nd February 1882.
" IMPROVE-
JOHN FORSYTH, of Glasgow, in the County of Lanark, North Britain,
MENTS IN THE TREATMENT, OR PREPARATION, OF HAIR FELT SUCH AS IS USED
FOR COVERING STEAM BOILERS, STEAM PIPES, AND LIKE PURPOSES,”-
-
This Invention which relates to improvements in the treatment, or preparation,
of hair felt such as is used for covering steam boilers, steam pipes and the like has
for its object to render such felt less capable of being. destroyed by fire or heat
than it is at present. The. Invention is carried into effect by affixing a thin
coating of incombustible material such as asbestos, steatite, slag wool, potter's clay,
mica, or analogous substance, or substances, to the surface, or surfaces, of the
felt. In preparing the felt so as to insure the adhesion of the incombustible
substances thereto there is applied to it a coating of silicate of soda, or glue, or
guin, or treacle, or rosin, or pitch, or farinaceous matter, or analogous adhesive
substance, in a solution, that is to say mixed with a liquid. Upon this adhesive
substance and whilst still in a sticky condition there is distributed upon it the
asbestos, steatite, or other incombustible substances herein before mentioned in a
fibrous, or pulverised, condition after which the sheets are passed between rollers
for smoothing and flattening them and thence into chests for finally drying them.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said John Forsyth in the Great Seal Patent Office on the 21st August
1882.
JOHN FORSYTHI, of Glasgow, in the County of Lanark, North Britain " IMPROVE-
MENTS IN THE TREATMENT OR PREPARATION OF HAIR FELT, SUCH AS IS USED
FOR COVERING STEAM-BOILERS, STEAM-PIPES, AND LIKE PURPOSES
"
My said Invention which relates to improvements in the treatment, or preparation,
of hair felt such as is used for covering steam-boilers, steam-pipes, and the like has
for its object to render such felt less capable of being destroyed by fire or heat
than it is at present. The Invention is carried into effect by affixing a coating or
incombustible material such as asbestos, steatite, slag wool, potter's clay, mica, or
analogous substance, or substances, to the surface, or surfaces, of the felt.-In
preparing the felt so as to insure the adhesion of the incombustible substances
thereto, there is applied to it a coating of silicate of soda, or glue, or gum, or
treacle, or rosin, or pitch, or farinaceous matter, or analogous adhesive substance,
in a solution, that is to say, mixed with a liquid. Upon this adhesive substance
and whilst still in a sticky condition there is distributed upon it the asbestos,
steatite, or other incombustible substances hereinbefore mentioned in a fibrous
condition that is to say as loose fibres, måtted or felted fibres, or woven fibres, or
such substance may be added in a pulverized, condition, after which the sheets are
passed between rollers for smoothing and flattening them and thence into heating
chests for finally drying them.
Having now described and particularly ascertained the nature of my said
Invention and the system, mode or manner in or under which the same is, or may
be, usod, or practically carried into effect, I would observe in conclusion that what
I consider to be novel and original and therefore claim as the Invention secured to
me by the hereinbefore in part recited Letters Patent is :-
The application and affixing of a coating of incombustible material to the surface
of hair felt in the manner herein before described.
In witness whereof I, the said John Forsyth, have hereunto set my hand and
seal this eleventh day of August in the year of our Lord One thousand
eight hundred and eighty two.