Year: 1888

page_text: I, ISAAC CORDINGLEY, of Trowbridge, Wiltshire, Engineer, do hereby declare the
nature of this invention to be as follows:-
By the construction of pulleys which I am about to describe I am enabled to pack
the various parts together in half the space occupied by the pulley when complete and
can put it together upon a shaft in awkward places where it would be impossible to
place an ordinary pulley even if split-as for example I could pass the parts of a
larger pulley between the arms and rim of a smaller one already upon the shaft and
fit it up behind the smaller one which would be impossible if the pulley were con-
structed in the ordinary manner.
I prefer to form the boss of cast iron in two pieces with a recessed interior and lugs
by which the parts can be bolted together. Radial boles are formed for the reception
of the spokes which may be solid or hollow and are preferably round and screw-
threaded for the required length (perhaps half their total length) towards their outer
ends. Suitable slippers adapted to be bolted to the rim are screwed to match the
spokes and lock nuts may be employed to prevent the spokes turning or shaking
loose.
Where the spokes are hollow they may be threaded internally and the slipper
replaced by a bolt or pin having a male thread to engage with the female thread of
the spoke; the lock nut could in this case be placed upon the screwed bolt.
In the boss a hole of smaller diameter is provided to connect the spoke hole with the
interior of the boss and permit of the spoke being driven out when it is desired to
take the pulley to pieces or replace the existing spokes with longer or shorter ones.
With this construction if an existing pulley has to be changed for a larger or smaller
one, this can be done within the limit of length of the existing spokes by simply
changing the rim for a larger or smaller one and screwing the slippers farther on or
farther off the spokes and if the spokes be too long or short they can be replaced by
more suitable ones with very little difficulty or expense. According to the kind of

page_text: slipper employed the end of the spoke may be altered in design; thus with a flat
slipper and undercut sides the end of the spoke would be flat and dovetailed to fit and
havo a longitudinal slot through which would pass the bolt by which the slipper and
spoke would be fastened together. Equally readily the rim may be exchanged for a
broader or narrower one, or the arms and rim may be retained and a new boss applied
having a larger or smaller hole, a longer or shorter bearing on the shaft or otherwise
differing from the existing one; or in the case of breakage of the boss a duplicato can
be supplied.
Dat thin 12th 1
T
1000

page_text: I, Isaac CordinGLEY of Trowbridge, Wiltshire, 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:-
By the construction of pulleys which I am about to describe I am enabled to pack
the various parts together in half the space occupied by the pulley when complete and
can put it together upon a shaft in awkward places where it would be impossible to
place an ordinary pulley even if split-as for example I could pass the parts of a larger
pulley between the arms and rim of a smaller one already upon the shaft and fit it
up behind the smaller one which would be impossible if the pulley were constructed
in the ordinary manner.
I prefer to form the boss of cast iron in two pieces with a recessed interior and lugs
by which the parts can be bolted together. Radial holes are formed for the reception
of the spokes which may be solid or hollow and are preferably round and screw-
threaded for the required length (perhaps half their total length) towards their outer
ends. Suitable slippers adapted to be bolted to the rim are screwed to match the
spokes and lock nuts may be employed to prevent the spokes turning or shaking
loose.
Where the spokes are hollow they may be threaded internally and the slipper
replaced by a bolt or pin having a male thread to engage with the female thread of the
spoke; the lock nut could in this case be placed upon the screwed bolt.
In the boss a hole of smaller diameter is provided to connect the spoke hole
with the interior of the boss and permit of the spoke being driven out when it is
desired to take the pulley to pieces or replace the existing spokes with longer or
shorter ones.
In the accompanying drawings:
Figs. 1 and 2 are respectively an elevation and a section of one form and
Fig. 3 is an elevation of half of another form of pulley constructed according to my
invention.
Like letters indicate like parts throughout the drawings.
A is the boss which I prefer to form in two pieces and unite them together by the
bolts and nuts A. Bare the spokes which are preferably round either solid or tubular
and the inner ends of which as shown in Fig. 2 fit into holes formed in the boss A.
B¹ are the outer ends of the spokes screwed so as to engage with the slippers C which
are screw-threaded internally for the purpose of receiving the said spokes, B2 are lock
nuts each of which may be screwed so as to jam tightly against the inner end of the
particular slipper C with which the corresponding spoke B engages. D is the rim
against whose inner surface the outer ends of the slippers C are secured preferably by
counter-sunk-licaded bolts C and the nuts thereon. The rim D is advantageously
made in two parts as shown these being united by the plates D¹ which are rivetted to
one part and fastened by bolts and nuts D² to the other part. The boss A is preferably

page_text: hollowed out at its middle part as shown in fig. 2 and holes A2 of smaller diameter than
those into which the inner ends of the spokes fit, are formed so that when necessary the
said spokes may be driven out of the boss by means of a hammer and suitable punch
or the like.
Instead of externally screw-threading the outer ends of the spokes B I may by
forming them tubular provide them with female-screw-threads for engaging with
screwed studs which will take the place of the slipper C and upon each of which may
be a lock nut for securing the parts together.
If desired the inner ends of the spokes B may be screw-threaded and the boss
provided with screw-threaded holes to receive them or, though such arrangement is not
to be considered desirable, in the case of tubular spokes the boss may be provided with
studs to engage with the inner ends of the spokes.
In the arrangement shown in figure 3 the outer ends instead of being screw-threaded
as in the preceding examples illustrated and described are flattened and formed with
slots B³ and the slippers Care constructed with recesses so that they can receive the
said flattened ends. The slippers are provided with bolts 03 which pass through them
and through the slots B³ and on each of which is a nut C for securing any one of the
spokes to its corresponding slipper in any desired position.
If desired the slots 133 may be formed in the slippers C and holes only large enough
to receive the bolts C³ in the spokes B.
Should circumstances necessitate the use of a pulley of (say) larger diameter than
that at which one of those herein described had previously been adjusted and operating
all that would be necessary to supply the want would be by removing the bolts and
nuts C¹² and D2 to detach the rim D, screw or adjust the slippers Coutwards to the
required extent and substitute for the former rim another rim of the desired diameter
or circumference the parts thereof being bolted together and to the slippers as was
the former one; and in the reverse manner a pulley of smaller diameter may be
provided.
If required the spokes B may be removed from the boss A and longer or shorter
spokes substituted therefor.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, 1 declare that what I
claim is :-
:-
1. In a pulley or the like the combination with the spokes formed of slippers such as C
or their equivalents which may be adjusted on or in the said spokes for enabling rims
of different diameters to be applied to the same set of spokes substantially as herein
described and illustrated in the accompanying drawings.
2. The complete pulley consisting of a boss, spokes, slippers and rim such as A B C
and D substantially as herein described and illustrated in tho accompanying drawings.
Dated this 7th day of December 1888.
ISAAC CORDINGLEY.