Improvements in Driving Belts.
Year: 1893

page_text: Date of Application, 16th Mar., 1893-Accepted, 2nd June, 1393
COMPLETE SPECIFICATION.
Improvements in Driving Belts.
A communication by KARL KÜCHLER, RICHARD KIND, and MORITZ KIND, all
of Aussig on the Elbe, in the Empire of Austria, Inventors.
I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E. of the Agency for
Foreign Patent Solicitors 6 Lord Street, Liverpool and 6 Bank Street, Man-
chester, both in the County of Lancaster, and 323 High Holborn in the County of
Middlesex, Civil Engineer, 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 :-
This invention has for its object a woven belt for driving pulleys and the like,
formed of animal or vegetable spun fibres (hemp, wool, hair or leather strips) the
warp of which is partly composed of wire, and which will in many cases advan-
tageously replace leather driving belts in that they are not so heavy, more durable
and less costly.
This improved driving belt consists essentially in a combination of soft elastic
fibres with metal (wire), and though, in the following Specification, only hemp
string is spoken of, yet it must be understood that the invention is applicable if
thick wool or cotton threads, or thread spun from animals' hair, or spuù cellulose
thread, or even thin strips of leather, be employed instead of string.
With regard to the style of weaving, as the belt will belong to that class of
stuffs known as double stuffs it will be formed by means of a double warp and
double sets of heddles.
The upper warp consists of soft threads and wire; whilst the under one will
merely consist of the soft material alone, for instance, of any of the before
mentioned materials, such as hemp-string, thick wool or cotton threads, or thread
spun from animals' hair, or spun cellulose thread, or even thin strips of leather.
The threads of the soft upper warp partly cross in the upper part of texture or
web only, and partly pass from the upper texture alternately into the lower texture
and vice versa, they thereby act as sewing threads in that they firmly unite the two
warps, that is, the upper and the lower one, together.
The threads of the wire warp only cross above. Simple wire may be used, but
it will be found more advantageous to form this thread by twisting together two or
more slender wires.
The weft merely consists of soft material, for instance, of the same kind of
materials as are employed for the soft warp threads. The same weft thread alter-
nately passes into the upper and the lower part of the belt. The crossing of the
threads may be effected in the same way as when linen or twill is being woven,
the method of weaving being of no importance, but what is the new and important
feature is the protected position of the wire warps amidst the soft material, for
they lie on a thick and soft lining and are thus protected against a too heavy and
detrimental use, and can easily follow the changes of position caused by the
movement round the pulleys when being used.
The threads of the wire warp are, however, not only borne by the thick lower
texture but are also surrounded by soft threads on the edges of the belt, with
which are also preferably interwoven strips of leather, forming the selvage and
making a very durable edge.
On the annexed drawing :-
Figures 1-3 represent vertical sections on the weft threads, consequently
parallel to the ward.

page_text: weft being shown somewhat separated out from one another for the sake of
perspicuity.
Figure 5 shows the warp threads, and, at the same time, how they are arranged
in the loom.
In all these figures—
d signifies the wire-warp thread: n the so-called sewing warp thread, that is, the
thread which passes from the upper to the lower texture: o the upper threads
(crossing above only): u the lower threads (crossing below only) and s the weft.
These figures represent an actual driving belt which gave excellent results.
But it must be clearly understood that equally good results can be obtained by
other styles of crossing, but it is believed that the style shown is as simple as any.
The belt can, of course, likewise be made turned on the loom, but in that case
the cording by means of which the treadle and leaf are connected becomes different,
it will then be as shown in Figure 6.
Supposing it is desired that each of the warp threads shall have its own leaf, it
would be only necessary to make but slight alterations. The threads of the warps
lying extremely close together and being thick besides several, for instance
3-4 threads are put between the eyes of the heald more distant from one another.
Figures 4 and 5 show that the threads no and u as regards themselves, cross in
the same way as is the case in weaving linen; but that is only given as an example,
the same system of crossing might be employed as in weaving twills.
As regards the loom it should be noted that it is best to beam up separately the
various kinds of the warp n, o, d and u, that is to use 4 warp-beams and also to
keep separate the small leather strips for the selvage, whereby the tension of the
thread becomes independent of its consumption.
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, as communicated to me
by my foreign correspondent, I declare that what I claim is :-
1. A woven driving belt consisting mainly of animal or vegetable spun fibres, but
the warp of which is partially composed of wire, so that, when completed, the belt
presents an elastic layer of fibre fabric, and an upper layer formed of wire cloth, for the
purpose of providing greater firmness and durability, and having selvage strips of
spun fibres on both sides of the belt, substantially as herein before described.
2. The selvage for a belt of the kind described, formed by means of small leather
strips being tied in along with the other materials by the weft.
Dated this 25th day of October 1892.

page_text: d
d
d
non/non
non non non non non no
n nn hn n n n n nn
nn
n
d
S.