IMPROVEMENTS IN STRAPS OR BELTS FOR DRIVING MACHINEY OR FOR OTHER PURPOSES
Year: 1876

page_text: LETTERS PATENT to David Lévy, of Boulevard Saint Denis, No. 1, at Paris,
Manufacturer, for the Invention of "IMPROVEMENTS IN STRAPS OR BELTS
FOR DRIVING MACHINEY OR FOR OTHER PURPOSES."
Sealed the 21st December 1876, and dated the 27th June 1876..
PROVISIONAL SPECIFICATION left by the said David Lévy at the Office of
the Commissioners of Patents on the 27th June 1876.
"IM-
DAVID LÉVY, of Boulevard Saint Denis, No. 1, at Paris, Manufacturer.
PROVEMENTS IN STRAPS OR BELTS FOR DRIVING MACHINERY OR FOR OTHER
PURPOSES."
This Invention has for its object the manufacture of a new kind of driving strap
or belt, the essential feature of which consists in the combination of one or more
strong webbings or bands with gutta percha. These webbings are woven in length
of the required width, and then laid together and cemented by gutta percha inter-
posed in a warm state.
The apparatus that I employ in the manufacture of these driving belts consists
of a heater or boiler, of iron or other suitable metal or material, heated by hot
liquid or steam, the lower portion of the said heater being a water and steam tight
receptacle, fitted with a pipe for the supply of the heated liquid or steam and with
a cock for drawing off the cooled liquid or the water of condensation.
The webbings which are brought together with the interposed gutta percha to
form the bands are drawn from reels, two or more, as the case may be, and pass
through the cover of the heater between guide rollers mounted therein, and thence
to and under stretcher rollers (by which the said webbings are temporarily kept
apart, but are brought together on passing under a single stretcher roller mounted
across the aperture or slit in the upper part of the heater, from which aperture
or slit the combined and cemented webbings pass out. Between the first stretching
rollers and exit stretching roller the webbings receive their coating of gutta peraha,
which is fed between the successive webbings from elongated hoppers or flattened
tubes supplied from a trough on the side of the heater. Immediately on the passage
of the combined webbings and gutta percha from the heater the band thus formed
is seized between two pressing rollers, which completes the band and at the same
time the bead or edge formed by the lateral exudation of the gutta percha is

page_text: removed, and the band is passed over rollers across a cooling table and is again
pressed by a second pair of pressure cylinders, and finally is fed to and rolled upon
a reel ready for use.
As above stated, there may be employed one or more webbings which may be of
hemp, twisted or not, and generally if all or any suitable textile material, and it
will be seen that by the above-described process the gutta percha will penetrate
the interstices of the webbing, and thus form the band of compactly massed
material."
SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said David Lévy in the Great Seal Patent Office on the 22nd
December 1876.
DAVID LÉVY, of Boulevard Saint Denis, No. 1, at Paris, Manufacturer.
"IM-
PROVEMENTS IN STRAPS OR BELTS FOR DRIVING MACHINERY OR FOR OTHER
PURPOSES."
My Invention has for its object the making of a new kind of belting, whose
essential character lies in the combination of one or more layers of the fabric or
fabrics, called, in French, sangle, united by means of gutta percha.
The material may be hemp or any fibrous fabric woven, plaited, twisted, or not,
as most convenient.
The layers of material (sangle) are woven in continuous lengths of the required
width and are superposed and brought together, and each layer covered with gutta
percha in the manner herein-after described.
In the accompanying Drawings Fig. 1 is a longitudinal section of the apparatus
for making my improved belting; Fig. 2 is a transverse section; and Figs. 3 and 4
are sections of belting.
The
The ends of the layer or layers of material (sangle) sprinkled with heated gutta
percha pass through a draw plate, whose object is to evenly distribute the gutta
percha over and between the two outsides of the layer or layers of material.
layer (or layers) is taken at its departure from the draw plate whilst the gutta
percha is still hot by two superposed grooved rollers of the width of the belting in
course of making. The object of these grooved rollers is to make the belting to the
required thickness by pressing towards the edges the excess gutta percha as well
as to give a finish to the borders of the belting. After this the gutta percha will
be found to have cooled, and can be coiled on to a reel situated a short distance off
for that purpose. In case the gutta percha should not be sufficiently cool on
leaving the grooved rollers a second set is provided, but without the groove,
through which the belting may pass on its way to the reel.
The apparatus (Fig. 1) is composed of a jacketted tank, made of iron, copper, or
other material, for holding steam a, a, the outside jacket b provided with a steam
pipe c for distributing steam, and a waste pipe d.
The layers of material h (of which four are shewn) start from the reels f, passing
between guide rollers g, g, and are kept apart at this stage by the retaining
rollers i, i, after which they join together on their arrival at the draw plate j.
After leaving the rollers i, i, and before arriving at the draw plate j, the layers of
material receive the gutta percha which is brought between them by long-necked
flues fed by a lateral feeding trough . After passing the draw plate j the layers
of material are perfectly superposed upon each other with the gutta percha between
them, and are then caught between the two rollers m, m, which compress them
and cut off any excess of gutta percha from the edges, which excess may be again
utilized. The belting is in most instances at this stage finished, but occasionally
it will be found desirable to pass it on to a kind of table furnished with rollers o
and p, from which it is coiled on to the reel q and is then ready for delivery.

page_text: The draw plate j, and rollers m, m, and p, may be made adjustable by means of
washers or otherwise in order to take different widths of material.
By the above arrangement the gutta percha fills all the pores or interstices in the
material, and the outside of the material may be uncovered with gutta percha, as
shewn in Fig. 3, or covered, as shewn in Fig. 4. The belting thus made is to a
great extent inextensible, airproof, waterproof, and resisting to acid and other
vapors.
Having now described the nature of my said Invention, and explained the
manner of carrying the same into practical effect, I desire to have it understood
that I do not confine myself to the particular arrangement above described, as
the same may be more or less modified without departing from the distinctive
characteristics of my Invention; but what I claim and desire to have secured to
me by the herein-before in part recited Letters Patent is, the combination of the
layer or layers of hemp or any fibrous fabric woven, plaited, twisted, or otherwise
(called in French sangle) and gutta percha, so as to form a belt or strap, as
described.
In witness whereof, I, the said David Lévy, have hereunto set my hand and
seal, this Twenty-first day of December, in the year of our Lord One
thousand eight hundred and seventy-six.
DAVID LÉVY, (LS.)