Improvements in or relating to Driving Belts.
Year: 1893

page_text: Date of Application, 14th Oct., 1893
Complete Specification Left, 12th June, 1894-Accepted, 14th July, 1894
TRUVIDIONAL
Improvements in or relating to Driving Belts.
I, GERHARD JOHANNES VAN EYKEN of 6 Kettenbrückstrasse, Mülheim
of Ruhr in the Empire of Germany Manufacturer, do hereby declare the nature of
this invention to be as follows:-
The present invention relates to a means for transmitting motion, and acts in a
manner similar to that of the usual driving belts or straps, and consists, not like the
latter of flat ribbon like strips, but of a tube made of india rubber or other elastic
material filled with compressed air.
The object of filling with compressed air, is to cause the engaging surface of the
tube to press everywhere upon the pulley with a force corresponding to that of the
air contained in the tube. It hence becomes unnecessary to subject the tube to an
excessive amount of tension in a longitudinal direction, such as is required with
straps in order to obtain the pressure necessary to ensure a firm hold upon the
pulley. Hence by means of the present invention the belt is not only subjected to
much less wear, but it also exerts a much greater power of adhesion on the pulley
than the ordinary belts of leather or similar material, and consequently its
capacity for transmitting power, is, relatively to its breadth, considerably
augmented.
With this new belt as compared with ordinary belts it becomes possible for an
equal transmission of force, to employ pulleys of much less width.
*The transverse section of the belt may be of such a shape, that while the cavity
of the tube is circular, that portion of the external surface which is applied to the
pulley is flat.
Dated this 14th day of October 1893
W. P. THOMPSON & BOULT,
Of London, Nottingham, Liverpool, and Manchester,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in or relating to Driving Belts.
I, GERHARD JOHANNES VAN EYKEN of 6 Kettenbrückstrasse, Mülheim
of Ruhr, Manufacturer, 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 :-
The present invention relates to a means for transmitting motion, and acts in a
manner similar to that of the usual driving belts or straps, and consists not like the
latter of flat ribbon like strips, but of a tube made of indiarubber or other elastic
material filled with compressed air.
The object of filling with compressed air is to cause the engaging surface of the
tube to press everywhere upon the pulley with a force corresponding to that of the
air contained in the tube. It hence becomes unnecessary to subject the tube to an
excessive amount of tension in a longitudinal direction, such as is required with
straps in order to obtain the pressure necessary to ensure a firm hold upon the
pulley. Hence by means of the present invention the belt is not only subjected to
much less wear but it also exerts a much greater power of adhesion on the pulley
Pin 1

page_text: than the ordinary belts of leather or similar material, and consequently its
breadth considerably
capacity for transmitting power is relatively to its
augmented.
With this new belt as compared with ordinary belts it becomes possible for an
equal transmission of force, to employ pulleys of much less width.
The transverse section of the belt may be of such a shape, that while the cavity
of the tube is circular, that portion of the external surface which is applied to the
pulley is flat.
Figures 1 to 6 of the accompanying drawings show in cross section six different
forms of the tubular driving band which are designed and adapted to give it a
good grip of the pulley; and of these the last two figures (5 and 6) in particular
show two such forms which for the purpose of transmitting high power, are con-
stituted by the combination of several separate tubes side by side to form a single
driving band with several tubular passages.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed I declare that what I
claim is ;-
1. The transmission of power by means of a tubular driving belt or band charged
with compressed air.
2. A driving belt or band for the transmission of power consisting of a rubber
guttapercha or equivalent tube charged with compressed air.
3. A driving belt or band such as claimed in Claim 2 a cross section of which
shows a circular internal chamber and a wholly or partly rectilinear exterior.
4. In a tubular driving belt or band such as claimed in Claim 2 the combination
of several separate internal tubes or chambers.
Dated this 12th day of June 1894.
זזזמ
W. P. THOMPSON & BOULT,
Agents for the Applicant.