NEW OR IMPROVED BELTING FOR DRIVING MACHINERY
Year: 1876

page_text: LETTERS PATENT to Thomas Duncan, of Port Glasgow, in the County of.
Renfrew, North Britain, for the Invention of "NEW OR IMPROVED BELTING
FOR DRIVING MACHINERY,"
Sealed the 12th April 1870, and dated the 11th February 1876.
PROVISIONAL SPECIFICATION left by the said Thomas Duncan at the Office
of the Commissioners of Patents on the 11th February 1876.
THOMAS DUNCAN, of Port Glasgow, in the County of Renfrew, North Britain..
"NEW OR IMPROVED BELTING FOR DRIVING MACHINERY."
This Invention, which relates to new or improved belting for driving machinery,
consists in the construction of the same from or out of sail cloth, and as a subtitute.
for belts constructed of leather.
In constructing belts according to this Invention the sail cloth is reduplicated.
longitudinally in layers corresponding to the desired width of the belt until the
required thickness is arrived at, and canvas or other equivalent material may be
laid between the several folds of sail cloth to increase or make up the desired
thickness. The sail cloth when folded in the manner described is compacted
together by means of an adhesive substance, such as resin, pitch, marine glue, or
the equivalent thereof, and it may be further strengthened by rows of stitching or
rivetting.
The belting manufactured in the manner herein-before described is flat, but it is
also to be understood that a round or rope-like belting inay be formed of the same
materials and in a similar inanner.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Thomas Duncan in the Great Seal Patent Office on the 5th August
1876.
"
THOMAS DUNCAN, of Port Glasgow, in the County of Renfrew, North Britain.
NEW OR IMPROVED BELTING FOR DRIVING MACHINERY."

page_text: My said Invention, which relates to new or improved belting for driving
machinery, consists in constructing the same from or out of sail cloth as a substitute
for belts constructed of leather.
In forming belts according to my said Invention the sail cloth is reduplicated
longitudinally in layers corresponding to the desired width of the belt, after
the manner illustrated in transverse section on the accompanying Sheet of Drawings,
or in a manner analogous thereto. The sail cloth is so reduplicated until the desired
thickness is arrived at, and canvas or other strong fabric is or may be laid between
the several folds of sail cloth to increase or make up the desired thickness. The
sail cloth when folded in the manner described is compacted together by means of
an adhesive substance, such as resin, pitch, marine glue, or the equivalent thereof,
and it is or may be further strengthened by stitching or sewing with cord or twine
through the several folds or layers of the cloth, the said stitches running in rows
parallel, transverse, diagonal, zig-zag, or in other directions relatively with the
length of the belt. After being cemented, and previous to or after being stitched,
the belt is preferably passed between pressure rollers.
Instead of stitching the several layers or folds of sail cloth together the belt may
be strengthened by rivetting such folds or layers, or both stitching and rivetting
may be employed for that purpose, or the belt may be strengthened if desired by
other equivalent means.
The belting manufactured in the manner herein-before described is flat, as shewn
on the annexed Drawings, but it is to be understood that a round or rope-
like belting may be formed of the same material, either by first folding flatly the
sail cloth in the direction of its length, and then rolling the folded fabric into a
rope-like form of the desired diameter or thickness, or by at once rolling up the
snil cloth in the direction of its length until the desired thickness is attained. With
this form of the belt, as in the case of the flat belt previously described, the several
folds or layers are also compacted or cemented together by means of pitch, resin,
marine glue, or other equivalent adhesive substance, and the belt may be
strengthened by stitching or rivetting, or both by stitching and rivetting, in the
manner herein-before described, or in a manner analogous thereto.
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 used or practically carried into effect, I would observe in conclusion that what
consider to be novel and original and therefore claim as the Invention secured to
me by the herein-before in part recited Letters Patent is, the new or improved
belting herein-before described, or any mere modification thereof, constructed of sail
cloth or of sail cloth and canvas or other strong fabric folded, reduplicated, or
rolled to the desired thickness, and cemented and stitched or rivetted, or both
stitched and rivetted, as set forth.
In witness whereof, I, the said Thomas Duncan, have hereunto set my hand
and seal, this Third day of August, One thousand eight hundred and seventy-
THOMAS DUNCAN. (L.S.)