Improvements in Pulleys.
Year: 1896

page_text: Date of Application, 22nd Jan., 1896
Complete Specification Left, 22nd Oct., 1896-Accepted, 28th Nov., 1896
I, GEORGE ALBERT BATEMAN, of the Firm of Richardson & Co., of Heathcote
Road, Epsom, in the County of Surrey, Engineer, do hereby declare the nature of
this invention to be as follows:-
My invention relates to pulleys and consists in the novel construction hereinafter
described whereby the bosses of pulleys are made adjustable so that they may
be applied to shafts of different diameters.
In a pulley constructed according to my invention the boss is made in segments
which are made to slide radially relatively with the axis of the pulley so that,
by moving them towards or away from the axis the diameter of the space or
aperture between them can be varied.
In practice I find it advantageous to mount the several segments upon the
spokes of the pulley, which spokes are screw-threaded and provided with nuts by
means of which the segments may be pressed into contact with the shaft upon
which the pulley is to be mounted.
In the case of a wrought iron pulley I prefer that the spokes should be rivetted
to the rim and the nuts bear directly upon the segments: in the case of cast iron
pulleys, however, I find it advantageous to connect the spokes at one end to the
segments, the other ends entering sockets on the rim, against which sockets the
adjusting nuts bear. The spokes may in some cases be screwed into the sockets
and the nuts used as lock nuts to prevent the said spokes from shifting.
It will be obvious that my invention is applicable to pulleys whether split or
divided or not.
Dated the 22nd day of January 1896.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
Improvements in Pulleys.
I, GEORGE ALBERT BATEMAN, of the Firm of Richardson & Co., of Heathcote
Road, Epsom, in the County of Surrey, 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 :-
My invention relates to pulleys and consists in the novel construction hereinafter
described whereby the bosses of pulleys are made adjustable so that they may be
applied to shafts of different diameters.
In a pulley constructed according to my invention the boss is formed in segments
which are made to slide radially relatively with the axis of the pulley, so that, by
moving them towards or away from the axis the diameter of the space or aperture
between them can be varied.
In practice I find it advantageous to mount the several segments upon the
spokes of the pulley, which spokes are screw-threaded and provided with nuts by

page_text: means of which the segments may be pressed into contact with the shaft upon
which the pulley is to be mounted.
In the case of a wrought iron pulley I prefer that the spokes should be riveted
to the rim and the nuts bear directly upon the segments: in the case of cast iron
pulleys, however, I find it advantageous to connect the spokes at one end to the
segments, the other ends entering sockets on the rim, against which sockets the
adjusting nuts bear. The spokes may, in some cases, be screwed into the sockets
and the nuts used as lock nuts to prevent the said spokes from shifting.
It will be obvious that my invention is applicable to pulleys whether split or
divided or not.
In the case of pulleys with wooden rims I prefer to screw the ends of the spokes
into the rim and to provide shoulders on the said spokes to bear against the inner
surface of the rim and when such pulleys are split I advantageously secure the
split halves together with clips having a lip at each end and being adapted to be
bolted to the two halves.
To enable my invention to be fully understood I will describe the same by
reference to the necompanying drawings, in which :-
Figure 1 is a sectional elevation of a wrought iron pulley constructed according
to my invention.
Figure 2 is a similar view of a cast-iron pulley constructed according to my
invention:
Figure 3 is a similar view of a wooden pulley constructed according to my
invention; and,
Figures 4 and 5 are views illustrating different ways of forming the segments
when the pulley is to be fixed on a square shaft.
Similar letters of reference indicate the same or corresponding parts in the
several figures.
a is the shaft on which the pulley is mounted. b is the rim of the pulley.
e,e are the spokes and d, d the segments of the boss of the pulley.
In the arrangement shewn in Figure 1, which represents a wrought-iron pulley,
the spokes c c are riveted at their outer ends to the rim of the pulley as shewn
at e, e, whilst their inner ends are screw-threaded and enter holes d', d', in the
segments d, d of the boss. f,fare the nuts on the spokes e, e for pressing the
segments d, d into contact with the shaft a.
With this construction of pulley it will be obvious that the boss can be made to
fit un to shafts of different diameters by adjusting the segments d, d, into which
the boss of the wheel is divided, radially by means of the nuts f. f.
In the arrangement shewn in Figure 2 which represents a cast-iron pulley the
spokes c, e, instead of being screw-threaded at their inner ends are screw-threaded
at their outer ends which enter the sockets g, g formed on the inner face of the
rim b of the pulley and are provided with heads c, el, at their inner ends which
engage in slots d' in the segments as clearly shewn. In this case the adjusting
nuts,bear against the inner faces of the sockets g when tightening the
segments d, d on the shaft a.
Figure 3 represents a pulley having a wooden rim b. In this case the spokes c, e
are screw-threaded at their inner ends and enter holes d¹ in the segments d
similarly to the arrangement shewn in Figure 1. The outer ends of the spokes are
also screw-threaded so that they can be screwed into the rim 6 as clearly shewn,
and are provided with shoulders i which bear against the inner face of the
said rim.
j,j are my clips having a lip at each end, the said clips being inserted into
grooves in the ends of the two halves of the rim to be joined and being then
bolted to the same by the bolts k, k. The lips j,j, prevent the joined ends of the
rim springing apart when the pulley is being fixed on the shaft.
It will be seen that in the arrangements above described I have shewn the
inner faces of the segments d of the boss of the wheel, that is to say, the faces
which come into contact with the surface of the shaft concave in shape and it

page_text: is the form which I prefer when the pulley is to be fixed to a cylindrical shaft
as the faces can then form edges which bite the shaft. When, however, my
pulleys are to be employed on square shafts I form the said inner faces of the
segments d either flat, as shewn in Figure 4, or notched, as shewn in Figure 5, so
that in the former case they press against the faces of the square shaft whilst
in the latter case they fit over the corners formed by the adjacent faces of the
shaft.
In some cases I form the said inner ends with a serrated or roughened surface.
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 :-
1. In a pulley forming the boss in segments and connecting the said segments
with the rim in such a manner that they can be adjusted radially substantially
as, and for the purpose, herein before described.
2. In a pulley, forming the boss of a number of segments having holes for
receiving the inner ends of the spokes of the pulley which spokes are screw-
threaded and provided with nuts, substantially as, and for the purpose, hereinbefore
described.
3. In a pulley, forming the boss of a number of segments which are secured
to the inner ends of the spokes of the wheel the outer ends of which spokes
are screw-threaded and provided with nuts for adjustably connecting them to the
rim of the wheel, substantially as, and for the purpose, hereinbefore described.
4. In a split pulley of the kind described in Claim 1 the employment of clips
having lips for securing together the two halves, substantially as described and
illustrated in Figure 3 of the accompanying drawing.
5. The manufacture and use of the improved pulleys hereinbefore described and
illustrated in the accompanying drawing.
Dated the 22nd day of October 1896.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.