Improvements in Pulleys.
Year: 1896

page_text: Date of Application, 4th Nov., 1896
PROVISIONAL SPECIFICATION.
Improvements in Pulleys.
I, JOHN PELL NORTHEY, of King Street Subway, 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 and the object of the invention
is to produce a light and strong pulley which may be easily and cheaply
manufactured and it consists essentially in making the rim of the pulley
separately from the hub and arms or spokes and providing a head for each spoke
which is of peculiar form and is rigidly connected at the outer ends to convolute
beads formed on the edges of the rim as hereinafter more particularly explained
Figure 1 is a sectional perspective view of a pulley constructed in accordance
with my invention, and with the heads of the arms or spokes made in the
preferred form.
Figures 2, 3 and 4 are similar views of alternative forms.
Figure 5, is a detail of the spoke head as it would appear before the ends are
rolled or spun into convolute form.
In the drawings like letters of reference indicate corresponding parts in each
figure.
A represents the rim of the pulley which is preferably made of sheet or other
pliable metal capable of being bent or spun into any desired shape. B represents
ine hub and C the arms, which are suitably secured in the hub as shewn in
Figures 1, 3, and 4 or form part thereof as shewn in Figure 2. The arm C may
be made tubular or solid in any desired shape.
D represents the head of each arm, which is made in the form of a cross piece
being gradually tapered towards each end. The head D is connected to the arm C
in any suitable manner, such as shewn in Figures 3 and 4 or is made solid with
the arm as shewn in Figure 2 in which the arm is divided at the top and half bent
to each side.
The head D shewn in Figure 1, is made of pliable metal in order that the enus
may be rolled or bent into any desired shape. The spoke heads D and rim before
being rolled are preferably less in width, and in fastening the rim to the spokes it
is placed around the spoke heads, so that the edges of rim overhang the edges
of the spoke heads. The edges of the rim and cross heads are then rolled or spun
together into spiral convolutions on the under side of the spoke heads, thereby
forming convolute beads d on the edges of the rim.
By this means the rim and spoke heads are inseparably bound together.
Although in practice. I find it preferable to connect the convolute beads to the
ends of the spoke heads in the manner described other suitable ways might be
devised whereby the ends of the spoke heads may be securely held by the convolute
beads on the edge of the rim, it being, however, essential that the ends of the
spoke heads enter into the convolutions of the beads sufficiently so as to bind them
together.

page_text: I find it preferable to make the rim and spoke heads either of malleable or
wrought iron in order that they can be readily worked up into the desired shape
without the danger of breaking or, risk of weakening any of the parts.
I may, however, stamp or form both of these parts out of sheet steel.
In Figure 3, I shew the spoke heads D with beaded ends which enter into
the beaded edges of the rim, which in this case would merely have a part
convolution as indicated.
In Figure 4, the beaded edge d is formed with a plurality of convolutions and
the spoke head D has an inwardly projecting portion d which enters the
convolution sufficiently so that when the bead is formed up the ends of the spoke
heads are securely wedged and bound into the bead. In this form I preferably
form shoulders d³ to the inside of the convolute bead as an auxiliary means to
ensure the binding of the ends of the spoke heads to the convolute bead.
In the construction of a pulley such as I describe it will be seen that the
employment of rivets, bolts or other like fastening devices is entirely avoided in
the attaching of the spokes or spoke heads to the rim.
It will thus be seen that a pulley manufactured in accordance with my
invention may be made cheaper, more easily and of a maximum strength for the
material used.
Dated shin 4th day of Navambor 1806
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
Improvements in Pulleys.
I, JOHN PELL NORTHEY, of King Street Subway, 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 and the object of the invention
is to produce a light and strong pulley, which may be easily and cheaply
manufactured and it consists essentially in making the rim of the pulley
separately from the hub and arms or spokes and providing a head for each spoke
which is of peculiar form and is rigidly connected at the outer ends to convolute
beads formed on the edges of the rim as hereinafter more particularly explained
reference being had to the drawings accompanying my Provisional Specification
in which:
-
Figure 1 is a sectional perspective view of a pulley constructed in accordance
with my invention, and with the heads of the arms or spokes made in the
preferred form:
Figures 2, 3 and 4 are similar views of alternative forms:
Figure 5 is a detail of the spoke head as it would appear before the ends are
rolled or spun into convolute form.
A represents the rim of the pulley which is preferably, made of sheet or other
plia e metal capable of being bent or spun into any desired shape. B. represents
the hub and C the arms, which are suitably secured in the hub as shewn in
Figures 1, 3 and 4 or form part thereof as shewn in Figure 2. The arms C may
be made tubular or solid in any desired shape.
D represents the head of each arm or spoke which is made in the form of a cross

page_text: piece gradually tapered towards each end. The head D is connected to the arm C
in any suitable manner, such as shewn in Figures 3 and 4 or is made solid with
the arm as shewn in Figure 2, in which the arm is divided at the top and half bent
to each side.
In the form in which the heads are separate from the spokes a boss is preferably
projected centrally from the heads to receive the end of the spokes.
The head D shewn in Figure 1, is made of pliable metal in order that the ends
may be rolled or bent in any desired shape. The spoke heads D before
being rolled are preferably less in width than the rim A and in fastening the rim
to the spokes it is placed around the spoke heads, so that the edges of the rim over
hang the edges of the spoke heads. The edges of the rim and spoke heads are then
rolled or sun together into spiral convolutions on the under side of the spoke
heads, thereby forming convolute beads d on the edges of the rim.
By this means the rim and spoke heads are inseparably bound together.
Although in practice I find it preferable to connect the convolute beads to the
ends of the spoke heads in the manner described other suitable ways may be
employed whereby the ends of the spoke heads may be securely held by the con-
volute beads on the edge of the rim, it being, however, essential that the ends of
the spoke heads enter into the convolutions of the beads sufficiently to bind them
together.
I find it preferable to make the rim and spoke heads either of malleable or
wrought iron in order that they can be readily worked up into the desired shape
without the danger of breaking or risk of weakening any of the parts.
I may, however, stamp or form both of these parts out of sheet steel.
In Figure 3 I show the spoke heads D' with beaded ends d¹ which enter into
the beaded edges d of the rim, which in this case would merely have a part
convolution as indicated.
In Figure 4 the beaded edge d is formed with a plurality of convolutions and
the spoke head D has an inwardly projecting portion which enters the
convolution to such an extent that when the bead is formed up the ends of the
spoke heads are securely wedged and bound into the bead. In this form I
advantageously form shoulders a³ at the inside of the convolute bead as an auxiliary
means to ensure the binding of the ends of the spoke heads to the convolute bead.
In the construction of a pulley such as I describe it will be seen that the
employment of rivets, bolts or other like fastening devices is entirely avoided in
attaching the spokes or spoke heads to the rim.
A pulley or wheel manufactured in accordance with my invention may be made
cheaper and more easily than hitherto and of a maximum strength for the
material used.
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 pulley the combination with the spokes and hub, of a rim formed,
separately from the spokes and having convolute beads at the edges thereof,
spoke heads attached to or forming part of the spokes extending across within
the rim, and having the ends entering into the convolute beads and held therein,
as, and for the purpose, specified.
2. In a pulley the combination with the spokes and hub, of a rim formed
separately from the spokes and having convolute beads at the edges thereof, and
spoke heads attached to or forming part of the ends of the spokes, extending across
within the rim and having reduced outer ends which are formed up into convo-
lutions within the convolute beads and following the convolutions of the bead as,
and for the purpose, specified.
3. In a pulley the combination with the spokes and hub, of a rim formed
separately from the spokes and having convolute beads at the edges thereof, spoke
heads extending across within the rim and having central bosses to receive and

page_text: hold the ends of the spokes, the reduced outer ends of the spoke heads entering
into and being held in the convolute beads as, and for the purpose, specified.
Dated the 4th day of August 1897.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.