IMPROVEMENTS IN ROPES OR BANDS FOR DRIVING
Year: 1883

page_text: LETTERS PATENT to William White, of Bingley, in the county of York,
Tanner and Leather Belt Manufacturer for an Invention of IMPROVEMENTS
IN ROPES OR BANDS FOR DRIVING
PROVISIONAL SPECIFICATION left by the said William White at the Office
of the Commissioners of Patents on the 24th August 1883.
WILLIAM WHITE of Bingley in the County of York Tanner and Leather Belt
Manufacturer. IMPROVEMENTS IN ROPES OR BANDS FOR DRIVING.
The object of this invention is to build up a belt of leather, paper-mache, or
other fibrous material of such a sectional area, that the belt will leave the pulley
grooves with freedom, and give the necessary friction for driving purposes with a
minimum weight of material and a maximum amount of strength for transmitting
power from one main shaft to another.
I accomplish my object by having the sides of the grooves in the pullies cut
straight at an angle of say about 50° to the face of the periphery of the pulley.
The belts, are built up in layers of leather, which may be interspersed with layers
of paper-mache or canvas, the whole being cemented, sewn, or rivetted together, and
when completed the sectional area is triangular.
By constructing belts in the manner described, the whole of the hide can be used
to better advantage, in as much as they are cut up into narrow strips, thus
admitting the use of the major portion of the hide. By the belt being of triangular
form, and the flat sides fitting the grooves in the pullies, the frictional contact with
the same is increased by the belt wedging in the grooves.

page_text: '
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said William White in the Patent Office on the 23rd February 1884.
WILLIAM WRITE of Bingley in the County of York, Tanner and Leather Belt
Manufacturer. IMPROVEMENTS IN ROPES OR BANDS FOR DRIVING
The object of this invention is to build up a belt of leather, papier-mache or other
fibrous material of such a sectional area, that the belt will leave the pulley grooves
with freedom, and give the necessary friction for driving purposes with a minimum
weight of material and a maximum amount of strength for transmitting power
from one main shaft to another, and consists in building the belts of triangular form
with layers of leather which may be intersperced with layers of papier-mache or
canvass, cemented, sewn or rivetted together.
In order to further explain my invention, I have appended a sheet of drawings
illustrative thereof, and marked the same with letters of reference. Figure 1
represents a side elevation of my improved belt, Figure 2 is a cross section through
same, and a portion of the pulley rim shewing the groove in which the belt is to
run, and Figure 3 is a plan of the belt.
The sides of the grooves in the pulley rim are cut straight at an angle with the
face of the periphery, and to a greater depth than the thickness of the belt in order
to give clearance at the bottom and obtain the necessary amount of friction. The
belts are built up in layers of leather B, jointed together with spliced ends, and the
various layers of leather may be intersperced with layers of papier-mache or canvass,
the whole being cemented, sewn with wire, or other material, or rivetted together,
the latter method I prefer, as from experiment I find it answers the best, the
rivets C, having a thread cut upon them the entire length, and are screwed
through several thicknesses of leather, the threads of the rivets embedding in the
leather securely binds the layers B, together and when completed the sectional
area is triangular.
By the belt being of triangular form and the flat sides fitting the grooves in the
pullies, the frictional contact with the same is increased by the belt wedging in
the grooves, and by cutting away the apex of the triangle at D, the wedging in
the grooves is somewhat regulated by the power that is being transmitted through
the belt; also the belt when running at a high speed will not twist in the grooves,
and thereby reduce the frictional contact as is the case with square ropes running
in triangular grooves.
Having thus described my invention, and in what manner I carry the same into
effect, I hereby declare that I make no claim to square ropes running in V shaped
grooves, but what I claim as my invention is:-
Bolts of triangular section constructed in layers, jointed in the manner shewn,
the layers being cemented, sewn, or secured' together with plain or screwed rivets,
substantially in the manner and for the purpose as hereinbefore described.
In witness whereof I the said William White bave hereunto set my hand and
seal this twenty second day of February in the year of our Lord one tliousand
eight hundred and eighty four.
TTTAL