An Improved Wheel or Pulley for Driving Machinery.
Year: 1894

page_text: Date of Application, 12th Mar., 1804
Complete Specification Left, 14th Jan., 1895-Accepted, 9th Mar.,
1895
PROVISIONAL SPECIFICATION.
An Improved Wheel or Pulley for Driving Machinery.
I, WILLIAM IVES, of Waterhouse Street, Halifax, in the County of York,
Architect, do hereby declare the nature of this invention to be as follows:-
My invention has reference to wheels or pulleys employed in driving machinery
of various descriptions, the object of my invention being to make a wheel or pulley
in such a manner as that the periphery will yield to pressure. By this means if a
pulley is being driven by a strap, cord. or chain the tension thereof can be drawn
tightly around the periphery of the said pulley or wheel so that the driving is made
more positive. By having a strap, cord, or chain always binding tightly on the
surface of a pulley a narrower or less strap, cord, or chain can be used than
formerly whereby the motive power required for driving same is lessened. The
means I employ for constructing a yielding pulley or drum consists in making the
rim of the pulley and the boss thereof separate but connected together by means
of springs made of steel or other suitable material. These springs may be made
of several forms or sections to answer the purpose described.
A yielding pulley can also be made by placing a rim around or over an ordinary
pulley, the two rims being kept apart by studs and spiral or other springs.
This invention may be applied to toothed wheels as well as pulleys so that the
rim of the wheel together with the teeth will yield to irregularities and the noise
occasioned by the wheels having back-lash will be considerably lessened.
Dated this 10th day of March 1894.
TASKER & CROSSLEY,
Halifax, Agents.
An Improved Wheel or Pulley for Driving machinery.
I, WILLIAM IVES, of Waterhouse Street, Halifax, in the County of York,
Architect, 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 has reference to wheels or pulleys employed in driving machinery
of various descriptions, the object of my invention being to make a wheel or pulley
in such a manner as that the periphery will yield to pressure. By this means if a
pulley is being driven by a strap, cord, or chain the tension thereof can be
drawn tightly around the periphery of the said pulley or wheel so that the driving
is made more positive.
Such being the nature and object of my invention, I will now proceed to describe
the same more fully, and for that purpose make reference to the accompanying
and illustrate a hub or
sheets of drawings illustrative thereof, wherein Figs.
central part of a wheel; A being the boss and it will be understood at once that
this boss may be made of any size or form to suit their various uses and inside the
bub there would be placed the axle or shaft of any description. I do not claim
for any special axle but it will be understood that the hub may be modified or

page_text: made to suit any axle with either ball bearings to same or otherwise, and B is the
annular rim, flange or periphery connected to the central boss by means of any
number (not limited) of my springs C of flat or oval section bent and twisted to
any of the shapes shewn in the drawings and of any suitable length or breadth
equal or unequal.
Figs. 2, 3, 4, 5, 6, 8 and 9 shew cross section through the boss or hub, and the
annular ring or periphery and also several ways of connecting the two with the
simplest form of my twisted springs. Figs. 10 to 13 shew different forms of springs.
Figs. 14 and 15 are likewise cross section shewing another form of spring being a
combination spring having each a bend and twist, and Fig. 16 another form of
combination spring having two bends and a twist each.
In carrying out my invention it will be seen that various forms of springs may be
employed which are fully illustrated together with their method of attachment
from Figs. 1 to 16, and in some cases the springs may be doubled or compounded
for additional strength after the manner of coach springs as shewn at J in Figs. 5,
12 and 13 and elsewhere.
In Figs. 14 and 15 I shew how the part B is made with a flange G for fitting
into a chamber or slot H which allows for the annular ring B to yield and yet to
have no lateral movement and to reduce friction in this arrangement I employ
rollers or antifriction bowls I as shewn in Fig. 15. It will be understood that this
arrangement for preventing lateral movement could be used with the other springs
shewn wherever thought desirable.
The springs may be bent and twisted into the various shapes before being placed
in position; or they may be bent from a flat piece of spring steel into their various
forms, that is, by taking a flat piece of spring steel of any suitable length and
fixing one end in its position it could be then bent and twisted into the required
form and the other end then fixed.
By adopting these twisted springs each and all of them will act at the same time,
whilst each spring bears its proper share of the strain and weight put upon it.
Pulleys constructed as herein shewn will yield to the pull of a driving strap and
they will ensure that the strap is always tight therefore a narrower strap, cord or
chain can be used than formerly whereby the motive power required for driving
same is lessened.
This invention may be applied to toothed wheels as well as pulleys so that the
rim of the wheel together with the teeth will yield to irregularities and the noise
occasioned by the wheels having back-lash will be considerably lessened.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is-
'
Firstly. In a wheel or pulley for driving shafting the employment of bent or
twisted flat springs C for connecting the hub or axle box A to the rim or flange B
arranged in the manner substantially as shewn and described.
Secondly. In a wheel or pulley for driving shafting, the use of a hub or axle
box A and rim or flange B connected together by flat (bent or twisted) steel
springs C, in combination with flange G and chamber H as shewn in Figs. 14
and 15.
Dated this 12th day of January 1895.
TASKER & CROSSLEY,
Halifax, Patent Agents.