An Improvement in Driving by Ropes or Cords.
Year: 1890

page_text: Date of Application, 8th Aug., 1890
Complete Specification Left, 8th May, 1891-Accepted, 13th June, 1891
PROVISIONAL SPECIFICATION.
An Improvement in Driving by Ropes or Cords.
JAMES BARBOUR of Falls Foundry Belfast Ireland Machinist do hereby
declare the nature of this invention to be as follows:-
This improvement in driving by ropes or cords is specially designed for band or
rope pullies whose axles are about at right angles to each other and where it is
required to make use of more than one groove in the driver or driven pullies.
Up till the present it has been the custom to use a separate endless rope for each
groove for transmitting power between two shafts at right angles to each other
this method had the disadvantages of unequal tension of the ropes and a splice for
each rope.
This improvement remedies these disadvantages and consists in using one endless
rope or cord which is passed round the different grooves in succession the last
groove of the driver supplying the first of the driven pulley and the last of the
driven supplies the first groove of the driver thus an equal tension on each driving
part of the rope is obtained and there is only one splice for any number of
grooves.
This improvement is a further developement or application of the arrangement
for which Letters Patent No. 1651, 1889 were granted to the present applicant but
in the case of shafts at right angles driven by one endless rope or cord in two or
more grooves it is not necessary to have guiding pullies larger in diameter and free
to turn upon the shafts.
Dated this 7th day of August, 1890.
JAMES BARBOUR.
COMPLETE SPECIFICATION.
An Improvement in Driving by Ropes or Cords.
JAMES BARBOUR of Fall's Foundry Belfast Ireland Machinist 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 improvement in driving by ropes or cords is specially designed for rope or
cord pulleys where the shafts through which the power has to be transmitted are
at right angles to each other or nearly so and where it is required to make use of
more than one groove in the driver or driven pulleys.
Up till the present it has been the custom to use a separate endless rope or cord
for each groove of the rope or cord pulleys where the shafts through which the
power has to be transmitted are at right angles to each other or nearly so. This
method had the disadvantages of unequal tension of the ropes or cords and of a
splice for each rope or cord."
This improvement remedies these disadvantages and consists in using one endless
rope or cord which is passed round the different grooves in succession as illustrated
in the drawing herewith in which a pair of 4 grooved pulleys B and C are shewn at
right angles to each other at Figs. 1, 2 and 3 and connected together by one endless
rope or cord A which is passed round the different grooves as follows using the
splice A' as the index it passes from groove 1 of pulley B into groove 4 of pulley C
thence to groove 4 of pulley B thence to groove 3 of pulley C thence to groove 3 of
pulley B thence to groove 2 of pulley C thence to groove 2 of pulley B thence to

page_text: groove 1 of pulley C thence to groove 1 of pulley B from which it passes again to
groove 4 of pulley C.
This improvement is a further developement or application of the arrangement
for which Letters Patent No. 1651, 1889 were granted to the present applicant, but
in the case of shafts at right angles driven by one endless rope or cord in two or
more grooves it is not necessary to have guiding pulleys larger in diameter and free
to turn upon the shaft.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is-
The improvement in driving by ropes or cords herein described and illustrated
whereby one endless rope or cord can be employed to work in more than one pair
of grooves to connect shafts which are at right angles to cach other or nearly so
and this without the introduction of guiding or tension pulleys.
Dated this 6th day of May 1891
JAMES BARBOUR.