Improvements in Sheet Metal Pulleys.
Year: 1894

page_text: This Print is in accordance with the Original Specification as it stands after
Amendment (under Section 18 of the Patents, &c., Act, 1883), as allowed
by the decision of the Comptroller General of the 16th day of March 1897.
Improvements in Sheet Metal Pulleys.
I, OLIVER WILLIAM KETOHUM, of 323, King Street West, in the City of
Toronto, in the County of York, in the Province of Ontario, Canada, Manufacturer,
do hereby declare the nature of this invention to be as follows:-
My invention relates to improvements in pulleys in which the web is formed
integral with the rim and the object of the invention is, first, to devise a means for
strengthening the rim at the edge where it is formed up from the web; secondly,
to strengthen the web of a pulley where it is formed integrally with the rim;
thirdly, to provide a simple means for connecting the hub to the web; fourthly, to
provide an improved and cheaply made surface for the face of the rim, which will
ensure a perfect grip of the belt upon such face; and fifthly, to provide a means
whereby the outer edge of the rim may be materially strengthened and it consists
essentially, first, when forming the rim and web of turning the web inwardly
beneath the rim so as to form a strengthening bead around such edge; secondly,
in forming two or more strengthening beads in the web either concentric or
radiating thirdly, of securing the web to the flange of the hub by a series of
rivets, bolts or beads punched outwardly from the flange of the hub to form
rivets; fourthly, in a solid pulley of preferably wrapping around the face of the
rim a plurality of convolutions of twine which are caused to lie in juxtaposition
upon the face of the rim and entirely cover such face, the ends being preferably
secured within the rim, and in a split pulley of wrapping around the face of
the rim so as to entirely cover such face a layer of canvas or other suitable
material, which is secured within the rim preferably beneath the base of the outer
brackets by which the two sections of the split pulley are secured together and,
fifthly, of forming an inwardly projecting bead around the outer edge of the
pulley and where extra strength is required of securing a supplemental web to
the hub, the outer edge of the web being turned or formed into the bead at the
outer edge of the rim of the pulley, the parts being otherwise constructed as
hereinafter more particularly explained.
Figure 1 is a perspective sectional view of a solid pulley constructed according
to my invention with the strengthening beads of the web formed concentric :
Figure 2 is a similar view shewing the strengthening beads of the web radial :
Figure 3 is a perspective view of a split pulley constructed in accordance with
my invention, sections being shewn separated:

page_text: Figure 4 is a perspective sectional view of a solid pulley comprised of two single
pulleys secured web to web:
Figure is a sectional perspective view of a split pulley provided with my
supplemental strengthening web:
Figure 6 is a similar view of a solid pulley provided with a supplemental
strengthening web.
In the drawings like letters of reference indicate corresponding parts in each
figure.
A is the web, and B the rim of the pulley. At the edge of the pulley where the
rim forms part of the web I turn in the web beneath the rim so as to form an arc-
shaped strengthening bead a. b is a bead or turned down edge formed around the
outer edge of the rim and designed to strengthen, and give a finished appearance to
the outside edge. I am also by the adoption of these beads enabled to use much
lighter sheet metal. a' are strengthening beads formed in the web A either
concentric as shewn in Figure 1, or radial as shown in Figure 2.
In Figures 1 and 2, C is the hub provided with a flange C₁ and teats c, the form
of which when punched out is indicated in dotted lines in these figures. The
teats c extend through holes a" made in the web and are r.vetted on the outside of
these holes so as to secure the flange C' of the hub to the web A.
D is the cord which has a knot à made in its end which is passed through a hole
into the inside of the rim and has a knot d made on it so as to hold the end from
slipping through such hole. The cord is wound around the face of the pulley so as to
form a series of convolutions which lie in juxtaposition and cover such face. The
opposite end also extends through a hold d, and has a knot d made on it so as to
securely hold the end of the twine.
I find in practice that the surface produced as described above forms an excellent
means for ensuring the grip of the belt upon the face of the pulley.
are
are
In Figure 3 the hub is formed in two portions and is provided with flanges C
by which the hub is secured together by means of the bolts C. E are brackets
which are secured at the abutting edge of the web and rim by rivets e passing
through flanges of the brackets. The faces of the brackets are flush with the edge
of the web and rim as shewn. When the sections are placed in position
G are
against each other the brackets are secured together by the bolts F.
wires which
secured in the beads a and of one section and
designed when the sections are brought together to fit into the beads a and b
of the other section so as to hold the heads of the outer edge of the face of
the rim perfectly flush with each other. When the parts are joined together
the flanges are preferably secured to the web in this figure also by the teats or
rivets c.
D is a layer of canvas which is wrapped around the face of the half rim
of each section and is turned in and secured beneath the base of the connecting
brackets E.
In Figure 4 I shew two integral portions with the webs abutting each other.
The face of the rim of each portion is formed up so that there is a gradually
increasing diameter from the bead to the web of each portion. In this manner
the crown is formed on the face of the rim of the pulley. The webs are secured
together within the rim by the rivets a". The hub is provided with a flange ("
which is U-shaped as shewn, the web A being secured to the flange by bolts or
rivets c.
The hub may be formed out of cast metal or may be formed up in sheet
metal in the form shewn. The pulley such as described in this figure is especially
designed for wide belting and is extremely strong and durable.
In Figure 5 which exhibits one half of a split pulley it will be noticed that the
flanges are provided as before described through which the halves are secured
together by bolts. The hub is preferably formed out of sheet metal with the central
flange U-shaped in cross section. In this form of pulley the web is secured by
rivets c to one side of the U-shaped flange C.
A' is a supplemental web which is provided with concentric beads and is rivetted
to the other side of the flange (by rivets c'. The outer edge of the web A¹ has

page_text: turned in bead a¹¹¹ which is formed up within the bead 6. By providing the web A¹
connected to the bead b and to the one side of the U-shaped flange as described this
edge of the pulley is rendered very rigid.
In Figure 6 which exhibits a solid pulley the supplemental web A' is secured to
the rim and flange of the hub in the same manner.
I am aware in car wheels there is an outwardly turned flange formed at the outer
edge of the rim in contra-distinction to my turned-in bead or edge b. This form of
wheel, however, would not at all serve my purpose as by the construction such as I
adopt used with integral web and rim freedom of movement of the belt upon the
pulley is ensured. The belt may also he slipped onto the pulley from either side.
I am aware that strengthening beads have been used in the web where the web
and rim have not been formed integral. In my form of construction the pulley is
greatly cheapened in comparison with the form in which the web and rim are
formed in separate portions and connected together as it takes several operations
to form the web and rim when formed separately but in my form of integrally
forming the web and rim the beads in the web and the rim may be formed up at two
operations.
In placing the cord on the face of the pulley in order to form a roughened wrapping
and thereby gripping surface for the belt I preferably use a suitable cement so as to
connect the separate strands of the cord lying in juxtaposition and cunse them to adhere
to the face of the rim.
.
Improvements in Sheet Metal Pulleys.
I, OLIVER WILLIAM KETCHUM, of 323, King Street, West, in the City of
Toronto, in the County of York, in the Province of Ontario, Canada, Manufacturer,.
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 improvements in pulleys in which the web is formed
integral with the rim and to enable the invention to be fully understood I will
describe the same by reference to Figures 3, 5 and 6 of the drawings accompanying
my Provisional Specification.
Fig. 3, is a perspective view of a split pulley constructed in accordance with my
invention, sections being shown separated.
Fig. 5, is a sectional perspective view of a split pulley provided with my supple-
mental strengthening web.
Fig. 6, is a similar view of a solid pulley provided with a supplemental
strengthening web.
In the drawings like letters of reference indicate corresponding parts in each
figure.
A, is the web, and, B, the rim of the pulley. At the edge of the pulley where the
ria forms part of the web I turn in the web beneath the rim so as to form an arc-
shaped strengthening bead, a. b, is a bead or turned down edge formed around the
outer edge of the rim and designed to strengthen, and give a finished appearance
to the outside edge. I am, also, by the adoption of these beads, enabled to use
much lighter sheet metal.
In Fig. 3, the hub, C, is formed in two portions and is provided with flanges, C³,
..
..
-
4

page_text: by which the hub is secured together by means of the bolts, C. E, are brackets
which are secured at the abutting edge of the web and rim by rivets, e, passing
through flanges of the brackets. The faces of the brackets are flush with the
edge of the web and rim as shown. When the sections are placed in position against
each other, the brackets are secured together by the holis, F. G, are wires which
are secured in the beads, a, and, b, of one section and are designed when the sections
are brought together to fit into the beads, a, and, b, of the other section, so as to hold
the beads of the outer edge of the face of the rim perfectly flush with each other
when the parts are joined together. The flanges are preferably secured to the web in
this figure also by the teats or rivets, c.
In Fig. 5, which exhibits one half of a split pulley it will be noticed that the
flanges, C, are provided as before described through which the halves are secured
together by holts. The hub is preferably formed out of sheet metal with the central
flange U-shaped in cross section. In this form of pulley the web is secured by
rivets, c, to one side of the U-shaped flange, C.
A', is a supplemental web, which is provided with concentric beads and is rivetted
to the other side of the flange, C, by rivets, c¹. The outer edge of the web A',
has a turned in bead, as, which is formed up within the bead, b. By providing the
web, A', connected to the bead, 6, and to the one side of the U-shaped flange as
described, this edge of the pulley is rendered very rigid.
In Fig. 6, which exhibits a solid pulley the supplemental web, A', is secured to the
rim and flange of the hub in the same manner.
I am aware in car wheels there is an outwardly turned flange formed at the outer
edge of the rim in contra-distinction to my turned in bead of edge, b. This form
of wheel, however, would not at all serve my purpose as by the construction such
as I adopt used with integral web and rim freedom of movement of the belt
upon the pulley is ensured. The belt may also be slipped onto the pulley from
either side.
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. In a sheet metal split pulley in which the web and rim are formed integral in
combination the web, A, having an inward turn beneath the rim, so as to form
strengthening bead, a, turned in edge of bead, 6, the wires, G, extending from the
bead, a, and, 6, of one section into the beads, a, and, b, of the other section, the hub, C,
formed in two parts, secured to the web, A, by rivets or bolts and having flanges, C,
secured together by the bolts, C, as and for the purpose specified.
2. In a sheet metal split pulley in which the web and rim are formed integral in
combination the web, A having an inward turn beneath the rim, so as to form a
strengthening bead, a, turned in edge or bead, b, the wires, G, extending from the
beads, a, and, b, of one section into the beads, a, and, b, of the other section, the
hub, C, formed in two parts, secured to the web, A, by rivets or bolts and having
flanges, C, secured together by the bolts, C, and brackets, E, on each section secured
together by the bolts, F, as and for the purpose specified.
3. In a sheet metal split pulley in which the web and rim. are formed integral in
combination the web, A having an inward turn beneath the rim, so as to form a
strengthening bead, a, turned in edge of bead, b, the wires, G, extending from the
beads, a, and, b, of one section into the heads, a, and, b, of the other section, the
hub, C formed in two parts, secured to the web, A, by rivets or bolts and having
flanges, C², secured together by the bolts, C³, brackets, E, on each section
secured together by the bolts, F, and canvas wrapping, D, the ends of which are
secured within the rim beneath the flanges of the bracket, E, as and for the purpose
specified..
4. In a sheet metal split pulley the combination with the web, A, having an inward
turn beneath the rim so as to form a strengthening bead, a, around this edge of the
rim and a turned down edge or bead formed at the outer edge of the rim and

page_text: the hub formed in two parts connected to the web and together as specified, of the
wires, G, secured within the beads, a, and, b, of one section and designed to be
brought into the beads, a, and, b, of the other section when the halves are fitted
together as and for the purpose specified.
5. The combination with the integrally formed web and rim, A, B, the web of
which is connected to the flange of the hub as specified, of a supplemental web, A¹
also secured to the flange of the hub and having its outer edge suitably secured to the
outer edge of the rim as and for the purpose specified.
6. The combination with the integrally formed web and rim, A, B, the web of
which is connected to the flange of the hub as specified, and the bead, b, formed at
the outer edge of the rim, of the supplemental web, A', secured to the flange of the
hub and having at its outer edge a bead, a³, which is formed or spun up with the
bead, b, at the outer edge of the rim as and for the purpose specified.
7. The combination with the integrally formed web and rim, A, B, the web of
which is connected to the flange of the hub as specified, the strengthening bead, a,
formed by the inward turn of the web beneath the rim and the bead, b, formed at the
outer edge of the rim, of the supplemental web, A', secured to the flange of the hub
and having at its outer edge a bead, a³, which is formed or spun up with the bead, b,
at the outer edge of the rim as and for the purpose specified.
Dated this 15th day of August 1894.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.