IMPROVEMENTS IN BELTS OR STRAPS FOR DRIVING PURPOSES, AND IN THE METHOD OF MANUFACTURING THE SAME."
Year: 1881

page_text: LETTERS PATENT to David Williams, of Portmadoc, North Wales, for an
Invention of "IMPROVEMENTS IN BELTS OR STRAPS FOR DRIVING PURPOSES,
AND IN THE METHOD OF MANUFACTURING THE SAME."
PROVISIONAL SPECIFICATION left by the said David Williams at the
Office of the Commissioners of Patents on the 16th May 1881.
66
DAVID WILLIAMS, of Portmadoc, North Wales. IMPROVEMENTS IN BELTS OR
STRAPS FOR DRIVING PURPOSES, AND IN THE METHOD OF MANUFACTURING THE
SAME.
"
This Invention consists of an improved canvas belting, the chief advantages of
which are its flexibility and adhesiveness, by reason of which it cannot possibly
slip upon the pulleys.
I construct my belting of strips or folds of canvas stitched together by machinery
and passed through rollers, then steeped in a solution of boiled oil and resin and
afterwards coated on both sides with a composition composed of white lead, varnish,
boiled oil, and slate dust, which renders it flexible and adhesive as well as preserves
it from rotting from the effects of dampness, water, or steam.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said David Williams in the Great Seal Patent Office on the
16th November 1881.
DAVID WILLIAMS, of Portmadoc, North Wales. "IMPROVEMENTS IN BELTS OR
STRAPS FOR DRIVING PURPOSES, AND IN THE METHOD OF MANUFACTURING THE
SAME."
"The
My Invention consists of an improved canvas belting now known as
Superior Patent Belting," the chief advantages of which are its flexibility and
adhesiveness, by reason of which it cannot possibly slip upon the pulleys.

page_text: I construct my belting preferably of strips or folds of flax canvas stitched
together by machinery and passed through rollers, then steeped in a solution of raw
oil and resin and passed again through rollers, and afterwards coated on both sides
twice with a composition composed of white lead, varnish, boiled oil, and slate
dust, which renders it flexible and adhesive, as well as preserves it from rotting
from the effects of dampness, water, or steam, it being in fact impervious to
dampness or water.
Such being the nature and object of this my said Invention,
I will now proceed to describe the same in detail, and the manner in which the
same may be performed or carried into practical effect.
I construct my belting preferably of strips or folds of flax canvas stitched
together by machinery, and passed through rollers to render the same even and
straight; it is then steeped in a solution composed of raw oil and resin, preferably
in the following proportions:-
Raw oil, twenty parts,
Resin, two parts;
and passed a second time through rollers to press the solution into it, and afterwards
coated on both sides twice with a composition composed of white lead, varnish,
boiled oil, and slate dust, preferably in the following proportions :-
White lead, three parts,
Boiled oil, twenty parts,
Varnish, nine tenth of one part,
Slate dust, six parts.
These materials are well mixed up in order to render them about the consistency
of paint, and put upon the belting with a brush; the belts after they are dry are
stretched by blocks or other suitable means so that they will not stretch when
working.
Belts or straps are by the above treatment rendered impervious to dampness,
steam, or water, and at the same time are made flexible and adhesive and not liable
to stretch when working.
Having thus fully described the nature and particulars of this my said Invention,
I would have it understood that what I claim to be secured to me by herein-
before in part recited Letters Patent is,―
The manufacture of canvas or cotton belting, whereby it is rendered flexible,
adhesive, and impervious to dampness by the means and treatment hereinbefore
described.
In witness whereof, I, the said David Williams, have hereunto set my
hand and seal, this Twenty nineth day of October, in the year of our
Lord One thousand eight hundred and eighty one.
Witness,
RICHARD WILLIAMS,
John E. Walsh,
Patent Agent,
Halifax and Leeds.
DAVID WILLIAMS. (L.S.)