Improvements in the Manufacture of Metal Pulleys, Wheels, and the like.
Year: 1898

page_text: Date of Application, 25th Jan., 1898
Complete Specification Left, 24th Oct., 1898-Accepted, 21st Jan., 1899
Improvements in the Manufacture of Metal Pulleys, Wheels,
and the like.
We, JOHN ALEXANDER KENNEDY-MCGREGOR, of 198, The Grove, Hammersmith,
in the County of London, Engineer, and ADOLPII GATES, of 24, New Oxford
Street, in the County of London, Merchant, do hereby declare the nature of this
invention to be as follows :-
This invention has reference to the manufacture of pulleys, wheels, and the like
(hereinafter called wheels) mainly or wholly from sheet metal in such a manner
that they can be produced in an advantageous manner at a comparatively low
price.
According to one construction a wheel having a grooved periphery and specially
suitable for use as a sash cord pulley is made out of two circular centrally
perforated blanks of sheet metal. Each of these blanks is dished or cupped by
pressure between dies, it may be by one pressing or stamping operation, so as to
form a short plain cylindrical rim portion connected at one end by an annular
inwardly extending curved portion to a centrally perforated hollow truncated
conical portion which extends backward towards the same side or end of the
rim as that to which the annular curved portion is connected and which has an
inwardly extending flat flange portion around the hole extending centrally there-
through. The free edges of the rims after stamping or pressing are trimmed to
shape. The rim portion of one of the stamped parts (hereinafter called for dis-
tinction the second part) is pressed between suitable dies to a concave shape in
section and so as to partly bear against the adjacent annular curved portion which
is or may be bent to the shape of a quarter of a circle. This part is inserted
within the plain rim of the other part (hereinafter called for distinction the first
part) a steel or other spindle having an enlarged central portion being previously
passed through the central hole in each part. The two parts are then held between
dies and the outer rim pressed by a closing die to a concave shape upon the inner
rim whereby the two parts are firmly held together by their now interlocked rims
without the aid of any other connection.
The rim of the second part instead of being bent to a concave section before
being placed within the rim of the first part, may if desired, be left plain and of
a size to slip into the latter rim and the two rims be simultaneously bent to a
concave shape in section. Or the rim of the second part may he omitted and the
rim of the first part made sufficiently long to enable it, when bent to a concave
section, to overlap and engage with the annular curved portion of the second part
and securely hold it in place.
According to another construction the wheel is made from two blanks each of
which is subjected to a combined pressing drawing and perforating operation
between suitably shaped dies whereby its outer peripheral portion is bent to one
side and to a shape adapted to form one half of a grooved rim of curved or
angular section, its central portion is formed into a hollow boss that extends from

page_text: the same side of the blank as the rim portion, and is closed at the outer end and
is adapted to form a spindle and the intermediate portion is formed with slots
or perforations the metal from which is struck up and arranged to project from
the side of the pressed blank opposite to that from which the boss projects. The
struck up portions preferably project from the outer ends of the slots in one part
and from the inner ends of the slots in the other part. The two parts thus
pressed to shape are placed together so that the struck up portions on each project
through the perforations of the other whereupon the projecting ends are turned
down in opposite directions and the two parts thereby rigidly held together.
In a modified construction, the two parts are stamped to shape and perforated as
just described but are without the struck up portions and are held together by a
plate that is placed between them and is provided at opposite sides with projecting
parts that are arranged to extend through the perforations in the stamped parts
and are then bent over at the ends so as to securely hold the two parts together.
The projections from the central plate may advantageously be struck up from such
plate.
In another construction the rim portion of the wheel is made from two circular
blanks and the central or body portion from two other circular blanks. These
blanks to form the rim are each stamped, centrally perforated and slotted to form
a curved or angular rim portion having an inwardly extending annular flange
carrying struck up laterally projecting parts around an open centre. The blanks
to form the body portions are made of a diameter to fit within and under the ri
portions and are each formed with slots or holes at or near the periphery and with
à hollow projecting boss. In putting the wheel together, the two rim portions are
placed flat against one another so that the lateral projections thereon extend in
opposite directions, and the two body portions are placed at the two opposite sides
of the rim portions so that the lateral projections extend through their slots nr
perforations whereupon the free ends of the projections are bent over onto the
body portions and the whole thereby securely locked together.
In a modification of the last described construction, the rim portions are per-
forated but are without the lateral projections which are arranged to project from
the inner sides of the body portions from which they are struck up so that when
the four portions are placed together the projections on each body portion will
project through the inwardly extending flange parts of the two rim portions and
through slots or holes in the other body portion whereupon their free ends are
bent over onto the body portions thereby locking the several portions firmly
together.
Instead of forming the body or central portions with hollow bosses they may
be formed with flanged central holes for the reception of a separate spindle having
an enlarged central portion as in the first construction herein described.
Dated this 25th day of January 180R

page_text: Street, in the County of London, Merchant, 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:-
This invention has reference to the manufacture of pulleys, wheels, and the like
(hereinafter called wheels) mainly or wholly from sheet metal in such a manner
that they can be produced in an advantageous manner at a comparatively low
price.
Referring to the accompanying drawings,
Figs. 1, 2 and 3 show respectively in cross section, side elevation and end view
one construction of wheel according to my invention suitable for use as a sash
cord pulley.
Figs. 4 and 5 are cross sections of the two main parts of such wheel, the part
shown in Fig. 4 not being in its final form; and Fig. 6 is a side elevation of a
spindle for use therewith.
The wheel is made out of two circular centrally perforated blanks of sheet metal.
Each of these blanks is dished or cupped by pressure between dies, it may be
by one pressing or stamping operation, to the shape shown in Fig. 4, so as to form
a short plain cylindrical rim portion 1 connected at one end by an annular inwardly
extending curved portion 2 to a centrally perforated hollow truncated conical
portion 3 which extends backward towards the same side or end of the rim as that
to which the annular curved portion 2 is connected and which has an inwardly
extending flat flange portion 4 around the hole 5 extending centrally there-
through. The free edges of the rims after stamping or pressing are trimmed to
shape. The rim portion 1 of one of the stamped parts (hereinafter called for
distinction the second part) is pressed between suitable dies to a concave shape in
section as shown at 1 in Fig. 5 and so as to partly bear against the adjacent
annular curved portion 2 which is or may be bent to the shape of a quarter of a
circle. This part 1 is inserted within the plain rim 1 of the other part shown
in Fig. 4 (hereinafter called for distinction the first part) a steel or other spindle
6 (Fig. 6) having an enlarged central portion 6ª being previously passed through
the central hole 5 in each part. The two parts are then held between dies adapted
to support the curved portion 2 and the outer rim pressed by a closing die to
a concave shape upon the inner rim as shown in Fig. 1 whereby the two parts are
firmly held together by their now interlocked rims without the aid of any other
connection.
The rim 1 Fig. 5, of the second part instead of being bent to a concave section
before being placed within the rim 1, Fig. 4, of the first part, may, if desired,
be left plain and of a size to slip into the latter rim and the two rims be simul-
taneously bent to a concave shape in section.
In the modified construction shown in Figs. 7 and 8 which are respectively
an end elevation and a cross section on the line a Fig. 7, the wheel is made
from two blanks each of which is subjected to a combined pressing drawing and
perforating operation between suitably shaped dies so as to form them to the shape
shown in Fig. 7 whereby the outer peripheral portion 1 of each plate is bent
to one side and to a shape adapted to form one half of a grooved rim of curved
or angular section, the central portion being formed into a hollow boss 6b that
extends from the same side of the blank as the rim portion 1* and is closed at
the outer end and is adapted to form a spindle, the intermediate portion 3 of
each blank is formed with slots or perforations 3. The blanks are held together
by a plate 7 (Fig. 9) that is placed between them and is provided at opposite sides
with projecting portions or tongues 7b that are arranged to extend through the
perforations 3 in the stamped parts and are then bent over at the ends so as to
securely hold the two parts together as shown in Figs. 7 and 8. The projecting
portions or tongues from the central plate 7 may advantageously be struck up
from such plate. In this construction the rim portions 1* of the wheel are shown
of angular section.
Instead of forming the body or central portions with hollow bosses Gb they may

page_text: be formed with flanged central holes for the reception of a separate spindle having
an enlarged central portion as in the first construction hereinbefore described with
reference to Figs. 1 to 6 inclusive.
Having now particularly described and ascertained the nature of the said in-
vention and in what manner the same is to be performed I desire to point out
that I am aware that it has previously been proposed to make wheels and pulleys
from a pair of metal parts pressed to the required form and arranged side by
side with portions of one part interlocking with the other and also from a pair
of such metal parts with the rim portions of each interlocking with an externally
grooved ring or strip, and I do not claim broadly such a construction but I declare
that what I claim is:-
1. A wheel made in two main parts of sheet metal pressed to shape, arranged
side by side, with their concave rims directly interlocked with each other and
fitting one within the other, substantially as described with reference to and shown
in Figs. 1 to 6 of the accompanying drawings.
2. A wheel made in two main parts pressed to shape and formed with perforations,
said parts being held together by a plate placed between them and provided at
opposite sides with projections or tongues that extend through the perforations in
the respective main parts and are bent over so as to lock both main parts to the
central plate substantially as described with reference to and shown in Figs. 78
and 9 of the accompanying drawings.