An Improvement in Separable Pulleys.
Year: 1891

page_text: Date of Application, 16th Feb., 1891
Complete Specification Left, 14th Nov., 1891-Accepted, 16th Jan., 1892
PROVISIONAL SPECIFICATION.
An Improvement in Separable 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 constructing a separable pulley so that it can be
separated in two ways, namely in a line with the diameter of its axis, and transverse
thereto.
The pulley is formed with a solid web instead of spokes, and is clamped together
by bolts and nuts which are inserted in suitable holes and recesses formed to receive
them. Each of the transverse parts has registering grooves upon its inner side, in
parallel lines transverse to and on both sides of the said axis. These grooves
are furnished with pockets or recesses suited to receive the head or nut of
the bolt.
My improved pulley may for certain purposes be so formed as to be separable
in the line of the diameter of the shaft only. In this case each of the separate
parts will be furnished with perforations in parallel lines transverse to said shaft.
Such perforations will be projected through to the periphery of the said pulley,
and fitted with pockets or recesses suitable for receiving the clamping bolts and
nuts, and locking keys will be added when desired to engage with said bolts, or to
secure the nuts thereof.
Dated this 16th day of February 1891.
S. S. BROMHEAD,
97, Newgate Street, E.C., Agent for Applicant.
COMPLETE SPECIFICATION.
An Improvement in Separable Pulleys.
I, VANTYLE WILLIAM CODDINGTON of Park Avenue, Kansas City, in the
United States of America, 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 for its object, first, to prevent the accidental displacement of
any of the clamping attachments upon the respective parts of a separable pulley
when upon the driving-shaft or removed therefrom, and second, to prevent the
clamping-bolts from turning; and it consists in the novel construction and com-
bination 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 the separable pulley with portions broken
away to show the clamping bolts and bolt-retaining pockets and the line of separation
in a transverse direction to the shaft.
Fig. 2 is an interior view of one of the parts of the separable pulley separated
transversely to the shaft and showing the concealed grooves for the bolts and the
pockets for the bolt-heads and nuts.
Fig. 3 is an alternate view of the pulley showing it as constructed of sections
running parallel to the axis of the shaft.
Similar letters of reference indicate corresponding parts in all the figures.
My invention is more particularly applicable to small-sized pulleys for shafts.

page_text: which require adjustable concealed clamping attachments, by means of which the
pulley may be secured or removed quickly from the shaft. Heretofore such concealed
attachments have not, however, prevented the working loose of one or the other
part of the said clamping attachment and the consequent loss of utility of the
pulley. This I obviate as follows:-
A, represents a web-pulley, which is preferably turned in a lathe and made in
the proper dimensions, with a periphery a*, and a central opening a, to receive the
bushing of shaft. In a transverse direction to the axis of its shaft on line a¹ said
pulley A is separated into two equal sections or parts a², a3. Upon the inner end
portion of one separate portion or section a³, of the pulley on both sides of the
shaft and in parallel lines transverse to said shaft-opening a, are made the longi-
tudinal grooves a, a, each one of which is of the comparative width and depth of
one-half of an ordinary bolt separated in the line of its diameter, and each groove
extends in opposite directions to within a short distance of the periphery of said
pulley. Intersecting with the groove a', in one direction and near its terminus is
made a transverse rectangular-shaped depression or pocket as, which extends below
the bottom of the said groove a*.
In the other direction the groove a', is extended through the periphery a*, of the
pulley, and a short distance from said periphery is made an intersecting cylindrical-
shaped depression or pocket a'. The groove a³, corresponds in length to the
groove a, and is extended through the periphery a*, of the pulley in the direction
opposite to that described by the said groove a. Intersecting with the groove a³,
nearly in line with the pockets or depressions a, is made a depression aº, and nearly
in line with the pocket a', is made a similar pocket as. In the inner end portion of
the other separable part a³ of the pulley are made registering grooves and
depressions, which are a complement of the grooves a, a, and depressions or
pockets a, a, a, a, in the part a³, and correspond exactly in position and extent.
In the grooves a, a, are placed the shanks 6 of the respective clamping
bolts B, and in the depressions a, a, are placed the heads ', of said bolts, which
are, as seen, reversed. The other ends 62, of the bolts B, are screw-threaded. In
the head b, of each bolt is made a transverse groove or socket 63. In the or
pockets a, a, are placed the rectangular nuts 6, which receive the threaded end
of the bolt B.
The two parts a³, a³ and nuts and then screwed or otherwise fastened firmly but
separably together. The pulley is then separated in the line of the diameter of the
axis of its shaft into two separable parts.
Within the perforations formed by the grooves a, a, and extending through the
periphery of the pulley a*, in the direction of the head 61, of the bolt is inserted a
locking-key C, which is cylindrical in shape and wedge-shaped at the lower end c,
and fitted to the socket 3, in the bolt head . The other end portion c¹, of the
key C, is cut in an oblique direction and is perforated at c³, through which perfora-
tion a slight distance below the opening in the periphery a*, of the pulley is inserted
a screw c, which penetrates the pulley in a direction tangential to its axis or shaft
and prevents the bolt B, from turning.
In securing the pulley to the shaft the separable parts of the pulley are fitted
with its particular bushing, or placed directly on the shaft in the usual manner.
The screw-threaded ends of the transverse clamping-bolts are inserted in the
respective bolt-grooves and carried to the opening in the nuts and by means of any
ordinary screw-driver fitted to the opening or socket ³. The bolts are turned
sufficiently to enter the nuts and clamp or removably secure the separate parts of
the pulley to the shaft.
The pulley, instead of being turned from one solid piece, may be made in layers,
as shown by horizontal lines in Fig. 3 and the pockets made in a sectional part or
layer, so as to hold the nuts and the perforations for the bolt-shanks cut in the
usual way, if preferred.
In my pulley the nut cannot turn, as the size and shape of the pocket and nut

page_text: are almost equal, and as the threaded end of the bolt passes through the nut the
length of the perforation is sufficient to permit the adjustment of the nut thereon
the distance required.
In this manner none of the parts of the pulley are liable to be disjointed or the
clamping bolts and nuts displaced. The thickness of the web of the pulley may
vary and be less than that of the periphery, sufficient depth only being required to
afford the depth to the pocket and perforations.
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 :-
1. A pulley having a solid web and separable in one direction upon a line
transverse to the axis and in the other in the line of of the diameter of said axis and
provided with clamping bolts and nuts, each one of said transverse parts of said
pulley having registering grooves upon its inner side in parallel lines transverse to
and on both sides of said axis projected through to the periphery of said pulley,
and retaining-pockets intersecting with said grooves, one of which pockets at each
side of the axis is adapted to retain the bolt-head and the other the nut, substantially
as described.
2. A separable pulley united in the line of the diameter of the shaft and each
one of the separate parts thereof having perforations in parallel lines transverse to
said shaft projected through to the periphery of said pulley, and pockets inter-
secting said perforations, clamping bolts and nuts in the respective perforations,
and locking-keys in said peripheral perforations engaging with the said bolts,
substantially as and for the purpose described.
Dated this 14th day of November 1891.
S. S. BROMHEAD,
97, Newgate Street, London, E.C., Patent Agent.