An Improvement in Pulleys.
Year: 1891

page_text: Date of Application, 16th Feb., 1891
Complete Specification Left, 14th Nov., 1891-Accepted, 19th Dec., '1891
TRUY IDIONAL SPECIFICATION.
An Improvement in Pulleys.
I, VANTYLE W. CODDINGTON of Park Avenue, Kansas City, in the State of
Missouri, United States of America, Architect, do hereby declare the nature of this
invention to be as follows:-
:―
This invention consists in so constructing the pulley of separable parts, that it
can be fitted to a shaft by means of clamping rods and nuts, and can be removed
when required without disturbing the shaft.
To effect this I form the centre bush or hub, the radial spokes, and rim of
separable parts, corresponding in number to the number of spokes. Each of these
parts on its inner side covers a portion of said shaft, and its outer face is in a plane
longitudinal to said shaft. Each one of said spokes has a squared inner end bearing
upon one face of said bushing, and each spoke has also opposite shoulders, and
clamping rods with adjustable nuts bearing upon such shoulders, such rods being
placed in registering perforations formed to receive them in said spokes.
My improved pulley is thus formed with parts which clamp on to the 'shaft; such
parts consisting of radial spokes adjustably clamped together in sets, together with
radial spoke spreading blocks extending between the said spokes.
Dated this 16th day of February 1891.
S. S. BROMHEAD,
97, Newgate Street, London, E.C., Agent for Applicant.
COMPLETE SPECIFICATION.
An Improvement in Pulleys.
I, VANTYLE WILLIAM CODDINGTON of Park Avenue, Kansas City in the
United States of America, Architect, do hereby declare the nature of this inven-
tion and in what manner the same is to be performed, to be particularly described
and ascertained in-and by the following statement :-
"The object of my invention is to provide the means for clamping pulleys 'having
either radial spokes or a solid web and similar shaft attachments firmly to a central
shaft, and also to enable the separable parts of the hub to adjust themselves 'to any
distortion of the shaft-opening which may occur through the action' of the clamping-
rods, thus forming a perfect bearing upon all sides of the shaft.
My invention consists in the novel construction and combination of parts, which
will first be fully described, and specifically pointed out in the claims.
'In the drawings
Figure 1 is a view in perspective of a web-pulley clamped to the shaft by means
of the detachable clamping-spokes and separable hub, showing in' dotted lines 'the
position of the inner ends of the clamping-spokes when shifted by the action of the
clamping-rods.
Fig. 2 is a side view of a separable spoked pulley, showing the invention applied
thereto.
Fig. 3 is a view in perspective of the separable spoked pulley, as seen in Fig. 2,
showing the separable hub and a portion of the shaft removed and in alignment with
'the hub-opening.
Fig. 4 is a view in perspective of a web-pulley, showing alternate means for
clamping the same to the shaft.

page_text: Fig. 5 is a vertical sectional view of Fig. 1 showing the spokes on one side of
the web only.
Similar letters of reference indicate corresponding parts in all the figures.
In the construction of my invention as shown in Fig. 1. A, represents a web-
pulley, the web a', of which extends from the inner side portion of the periphery the
required diameter of the pulley, and is provided with a transverse opening a², in line
with the axis of said pulley to receive and fit loosely the shaft C. Around
shaft C, contiguous to one side of the web a', is a close-fitting hub or bushing B,
which is made with the circular opening, extending in the line of the axis of said
hub and of the same radius of curvature as shaft C. The said hub or bushing is
separated into four parts b', ', b', 61, each part covering a segmental portion of the
surface of said shaft. The outer side portion of each part of the hub B, is cut in
a plane in the longitudinal direction of the shaft, each one of which planes is
of corresponding extent, and together constitute a series of bearing faces 2.
From the face portion 2 of each separable portion of the hub B, extending an
equal distance and radially to the circumference of shaft C, is a series of adjustable
spokes D, D, D, D, the contiguous end portions of which spokes bearing on the
faces 63, of the parts, of the hub B, are squared and correspond in width in the
longitudinal direction of shaft C, to that of the faces 63, of said parts 6' of the hub.
The other end portion of each spoke D, is cut away in opposite directions and
at a corresponding angle to the radius of the shaft C, so as to form inclines or
shoulders d³, d, which slope or incline inwardly. Extending through adjacent
spokes D, D, and their shoulders d³, d³, which are in line and in one direction both
above and below the shaft C, are made in parallel lines the perforations d, d.
Through the other shoulder d³ in line with each other and in a direction at right
angles to the perforations d', d, are made the registering perforations do, do, and
d', d'. Through the perforations d', d, are inserted the separable clamping
rods ffff. Upon the end of each rod is a head fo, and the other end screw
threaded and provided with the adjusting nut 3 Through the registering
perforations de, de, d, d, are inserted the separate clamping rods f', f³, each one
of which rods is provided with a head fº, at one end and screw-threaded at the
other, and to which end is fitted an adjusting nut f³.
In a transverse direction to and through each one of the spokes D, in the
direction of the web a', of the pulley, is made a longitudinal slot d: Through
the slots, and into the web a', are inserted the screw-threaded ends of the bolts 6º,
the other ends of which bolts are provided with bolt-heads in the usual manner.
In Figs. 2 and 3 I have shown a spoked pulley in which the spokes are also a
constituent part of the means for clamping the pulley to the shaft. In said
figures the periphery of the pulley is separated into two parts, and the means for
clamning the spokes to the shaft are the same as in Fig. 1, the spokes G, G, in
said Figs. 2 and 3 being extended to the periphery of the pulley. In said Figs. 2
and 3 I have shown the web in a modified form as at H, extending from the inner
side portion of the periphery a short distance in the direction of shaft C, and
increased in the line of the spokes G.
Through the ends of each one of the spokes G, near said periphery is made
the radial slot h, in line with said web to receive said extended portion of the
web.
In the application of the invention to web-pulleys shewn in Fig. 4, I may
dispense with the clamping rods f, f, in one direction, and in their place attach to
the web fixedly, or to the periphery, as preferred, on both sides of shaft C, the
spoke-spreading blocks A', A³, which extend between the outer adjacent ends of
the spokes D, D, which are clamped by the rods f¹, ƒ³, and retain said spoke the
proper distance apart.
The corner portions a², of said ends are cut away in a corresponding degree to
the inclination of the sides of spokes D, upon which portions the spokes bear and
have free movement. Said blocks A¹, A, extend to the rods f¹, ƒ³, but all that
is necessary is to afford the bearing for the spokes D, D.

page_text: In securing the pulleys to the shaft the several parts of the hub are placed upon
the shaft in regular order-first the separate parts b¹, and then the spokes D,-
the clamping bolts inserted, and the nuts turned on the rods, so as to
draw the bearing ends of the spokes on the faces , in the direction of shaft C.
In this operation the tightening of one clamping-rod has the effect to change
the relation of the bearing surfaces of the end of each spoke to the shaft, and
bring to bear an unequal pressure upon each face of the separable parts of the hub,
which parts slip around the shaft in the direction of the greatest pressure and
adjust themselves to equalise the bearings.
In Fig. 1. I have shown in dotted lines the result of the action of the clamping
rods, which distort the position of the lower ends of the spokes D, D, the
movement of which is resisted by the rods f, f. To meet this distortion, as the
separable parts of the hub slip on shaft C, the contiguous end portions of the spokes
which bear on the faces b³, of the separable parts, of the hub also shift in
position, and the pressure upon the shaft is made direct as the adjustments of the
clamping-rods are successively made.
In clamping web-pulleys to the shaft the slots d*, in the spokes permit the spokes
to be moved without removing the fastening screws.
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. The combination, in a separable pulley, with the rim, of a series of radial
spokes, a central shaft, and a hub or bushing on said shaft, composed of separable
parts corresponding in number to said spokes, having the inuer side portion of each
part covering a portion of the surface of said shaft and its outer face portion in a
plane longitudinal to said shaft, each one of said spokes having a squared inner end
bearing upon one face of said bushing and each spoke having opposite shoulders,
clamping rods in registering perforations of said spokes, and adjusting-nuts
on said rods bearing upon said shoulders, substantially as and for the purpose
described.
2. A pulley having shaft-clamping parts, consisting of a series of radial spokes
adjustably clamped together in sets, and radial spoke-spreading blocks extending
between said adjustably-clamped spokes, substantially as and for the purpose
describéd.
Dated this 14th day of November 1891.
S. S. BROMHEAD,
97, Newgate Street, London, E.C., Patent Agent.