Improvements in and relating to the Frictional Driving Surfaces of Pulleys and other Mechanism.
Year: 1892

page_text: 1
Date of Application, 9th Apr., 1892
Complete Specification Left, 9th Jan., 1893-Accepted, 4th Mar., 1893
PROVISIONAL SPECIFICATION.
Improvements in and relating to the Frictional Driving Surfaces of
Pulleys and other Mechanism.
I, CLAUDE THEODORE JAMES VAUTIN, of 42 Old Broad Street, in the City of
London, Metallurgist, do hereby declare the nature of this invention to be as
follows:-
:-
My invention relates to an improved method of covering the peripheries of
driving pulleys or other surfaces, with hardened paper, leather, or other vegetable
pulp, so that the turning of the faces of the pulley or other driving drum or wheel
may be dispensed with, and the outer surfaces of the pulp covering affords a true
surface, giving a much better frictional grip to an ordinary driving belt than can be
obtained from an ordinary metal face.
To carry my invention into effect, I form a drum or mandril of a series of rough
unturned iron pulleys placed side by side on a shaft, so that they will revolve
therewith; or I may employ wooden discs on a structure of wood or other suitable
material to form the body of the said drum.
1 rotate the said drum in contact with a tray or trough or travelling felt carrying
prepared pulp, so that the said drum or iron pulley will take up on its surface a
uniform layer of the said pulp, and I continue the rotation of the said drum until
the pulp has accumulated to a sufficient thickness.
The said pulp surface is then dried and may be treated by rolling, pressure, or
planishing, to render it hard and true; or if required it may be turned.
The said pulp surface may be treated if desired, to render it waterproof and
impervious to weather, by soaking it in a mixture of creosote or carbolic acid, and
a hydro carbon, such as pitch, bitumen, or asphaltum, or with heated paraffin or
ozokerit wax, or with a mixture of resin in resin oil.
If the drum has been formed of a series of pulleys or discs, the pulp surface may
then be divided by a parting tool and the pulleys or discs, so covered by a pulp
surface, which adheres with certainty to the under material, may be then separated
from one another, and are then ready so far as their outer surfaces go, for use.
Dated this 6th day of April 1892.
FELL & WILDING,
1, Queen Victoria Street, London, E.C., Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in and relating to the Frictional Driving Surfaces of
Pulleys and other Mechanism.
I, CLAUDE THEODORE JAMES VAUTIN, of 42 Old Broad Street, in the City of
London, Metallurgist, 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:-
My invention relates to an improved method of covering the peripheries of
driving pulley or other surfaces, with hardened paper, leather, or other vegetable
pulp, so that the turning of the faces of the pulley, or other driving drum or wheel,
may be dispensed with, and the outer surface of the pulp covering affords a true
surface giving a better frictional grip to an ordinary driving belt than can be
obtained from an ordinary metal face.
My invention consists in the application of a continuous rim of homogeneous,

page_text: hard, and waterproofed pulp fibre to the periphery of a pulley, drum, or other
mechanism, and in the special method hereinafter described for effecting this
purpose.
In order that my invention may be the better understood, I will now proceed to
describe the same in relation to the drawings hereunto annexed, reference being had
to the letters and figures marked thereon. Like letters refer to like parts in the
various figures.
Figure 1 is a view of an ordinary pulley with a rim according to my invention.
Figure 2 is a perspective view of the same.
Figure 3 is a view of a series of pulleys or drums mounted upon a mandrel to
receive the pulp rim.
Figure 4 is a view of a split pulley with the pulp rim attached.
To carry my invention into effect in the case where a new article is to be
produced, I form a drum or mandrel of a series of rough unturned iron pulleys,
drums, or wheels A placed side by side upon a shaft B, so that they will revolve
therewith; or equivalently these pulleys may be wooden discs or a structure of
wood, preferably waterproofed, or other suitable material to form the body of the
said drum A. In order to ensure the pulleys turning with the mandrel, I arrange
a shoulder C, at one end, and jamming nut D at the other end of the shaft B, so ag
to press the pulleys together and against the collar C to form a drum. I then
rotate the said drum in contact with a travelling felt band carrying a layer of
prepared pulp in a similar manner as is employed in the known manufacture of
barrels, card-board, etc., so that the said drum will take up on its surface a uniform
layer of the said pulp, and I continue the rotation of the said drum until the pulp
has accumulated to a sufficient thickness.
The drum is then removed from contact with the travelling felt band, and the
pulp is dried, and can be treated to consolidate the rim if necessary by rolling
pressure, or planishing, which will render it hard and true. If desired it may be
subsequently turned in a lathe.
The said pulp surface is then treated by soaking it in a mixture of creosote or
carbolic acid, and a hydrocarbon such as pitch, bitumen, or asphaltum, or with
heated paraffin or ozokerit wax; or a mixture of resin and resin oil; to render it
waterproof and impervious to weather, and also to increase the durability of the
pulp rim.
The periphery of the drum is then divided by a parting tool, and the pulleys are
withdrawn separately from the mandrel, covered with a pulp surface E, which
adheres to the under material of the rim F, and are then ready for use as far as
their outer surfaces are concerned, and appear as shown in Figures 1 and 2 for
example.
It is obvious that I may coat a single pulley in precisely the same manner as a
number of pulleys as hereinbefore described.
In some cases I find it convenient in order to ensure the perfect fixing of the rim
to the centre & in order to produce positive drive between the rim and the centre,
to insert one or more rivets or bolts & through the pulp rim E and the rim F of the
supporting centre.
Also in the case of affixing a prepared pulp rim E to a split pulley, I divide the
rim in one or more places and affix the said rim by rivets, bolts, or other fastening
devices G. I show a split pulley in Figure 4, in which I have divided the rim E,
at only one place H, it being flexible enough to allow of the two halves being drawn
apart from one another sufficiently to put the pulley on the shaft.
Having now particularly described and ascertained the nature of my inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1st. A process for the manufacture of driving pulleys consisting of the forming
upon the surface of a drum, drums and mandrel • continuous homomoneaua wim af

page_text: hardening of the same by rolling and planishing, and the waterproofing of the same
in the manner, substantially as herein described.
2nd. A driving pulley composed of a hard planished, homogeneous and water-
proofed pulp fibre rim applied to a centre or drum in the manner substantially as
herein described.
Dated this 9th day of January 1893.
FELL & WILDING,
1, Queen Victoria Street, London, E.C., Agents for the Applicant.