provements in the Manufacture of Metallic Driving Pulleys and other like Pulleys.
Year: 1896

page_text: Date of Application, 22nd May, 1896
Complete Specification Left, 26th Jan., 1897-Accepted, 27th Feb., 1897
PROVISIONAL SPECIFICATION.
IRUVIDIONAL DI DOTETUATION
Improvements in the Manufacture of Metallic Driving Pulleys and
other like Pulleys.
We, TAYLOR AND CHALLEN LIMITED, of Nos. 60 and 62 Constitution Hill,
Birmingham, in the County of Warwick, Engineers and STEPHEN WILLIAM
CHALLEN and WALTER BERNARD CHALLEN, of Taylor and Challen Limited,
aforesaid Engineers do hereby declare the nature of this invention to be as
follows:-
The said invention consists of the process or combination of processes hereinafter
described for the manufacture of metallic driving pulleys and other like pulleys,
such for example as guide pulleys mainly from sheet metal.
Metallic driving
pulleys and like pulleys made according to the said invention are light in weight, of
great strength and not liable to tracture.
The said invention is applicable to the manufacture of pulleys of three kinds
namely of plain pulleys or pulleys without flanges single flanged pulleys and double
flanged pulleys.
In making according to the said invention a plain or unflauged pulley we proceed
as follows. We take a disc of thin sheet metal preferably iron or steel and by
means of the process commonly known as the drawing through process we raise
from the said dise a shallow cylindrical cup. By means of dies and pressure we
operate on the said shallow cip so as to force its bottom inwards until it occupies
a position midway between the two ends of the cup. There is thus produced a
short tube having a diaphragm at its middle the said tube having a double thickness
of metal throughout one half its length and only a single thickness of metal in the
other half of its length. A central hole is made in the diaphragm and to the said
diaphragm a hollow boss for taking on the shaft is affixed by rivetting or otherwise.
Or where great strength is required in a plain pulley we make the pulley of two
discs rivetted on opposite sides of the boss for taking on the shaft the said discs
having cylindrical flanges of double thickness of metal which flanges when fixed end.
to end constitute the cylindrical or acting face of the pulley. A separate ring or
hoop is inserted between the folds of the cylindrical flanges.
Or in order to make a strong plain pulley we employ a second cup shaped
diaphragm which is inserted in the open end of the pulley and fixed in position by
the said open end being turned over or beaded on the edge of the said second cup
shaped diaphragm.
In making according to the said invention a single flanged pulley we proceed as
follows. We make a cup in the manner already described but of greater depth
than the cup to be made into a flangeless pulley and we force the bottom of the cup
inwards but only to such a depth as to form a diaphragm which in the finished
pulley will be midway between its ends. The open end of the cup is expanded into
a plane at right angles to the axis of the cup and there is thus formed a pulley
Having a flange at one of its ends. Or we operate on the cup so as to forin the
flange at that end of the said cup at which by the forcing inwards of its bottom to
make the middle diaphragm there is a double thickness of metal. The flange
formed has a greater strength than the flange formed by the method of manufacture
last described.
In making according to the said invention a double flanged pulley we proceed as

page_text: follows. We take two of the single flanged pulleys made preferably by the method
last described and making their open ends true by turning or otherwise place the
said open ends together edge to edge and secure the two pieces together by
rivetting the diaphragms of the two parts to the hollow boss which engages with
the shaft.
Dated this Twenty-second day of May 1896.
W. T. WHITEMAN,
Agent for the Applicants.
Improvements in the Manufacture of Metallic Driving Pulleys and
other like Pulleys.
We, TAYLOR AND CHALLEN LIMITED of Nos. 60 and 62, Constitution Hill,
Birmingham in the County of Warwick, Engineers, and STEPHEN WILLIAM
CHALLEN and WALTER BERNARD CHALLEN, of Taylor and Challen Limited,
aforesaid, Engineers, do bereby declare the nature of the said invention and in
what manner the same is to be performed to be particularly described and
ascertained in and by the following statement :-
The said invention consists of the process or combination of processes hereinafter
described for the manufacture of metallic driving pulleys, and other like pulleys,
such for example as guide pulleys, mainly from sheet metal. Metallic driving
pulleys and like pulleys made according to the said invention are light in weight,
of great strength and not liable to fracture.
The said invention is applicable to the manufacture of pulleys of three kinds,
namely of plain pulleys or pulleys without flanges, single flanged pulleys and double
flanged pulleys.
In making, according to the said invention, a plain or unflanged pulley we
proceed as follows. We take a disc of thin sheet metal, preferably iron or steel
and by means of the process commonly known as the drawing through process we
raise from the said dise a shallow cylindrical cup. By means of dies and pressure
we operate on the said shallow cup so as to force its bottom inwards until it occupies
a position midway between the two ends of the cup. There is thus produced a short
tube having a diaphragm at its middle the said tube having a double thickness of
metal throughout one half its length and only a single thickness of metal in the
other half of its length. A central hole is made in the diaphragm and to the said
diaphragm a hollow boss for taking on the shaft is affixed by rivetting or otherwise.
Or where great strength is required in a plain pulley we make the pulley of two
discs rivetted on opposite sides of the boss for taking on the shaft, the said discs
having cylindrical rims or sides of double thickness of metal, which rims or sides
when fixed end to end constitute the cylindrical or acting face of the pulley.
A separate ring or hoop is inserted between the folds of the cylindrical rims
or sides.
Or in order to make a strong plain pulley we employ a second cup shaped
diaphragm which is inserted in the open end of the pulley and fixed in position by
the said open end being turned over or beaded on the edge of the said second cup"
shaped diaphragm.
In making, according to the said invention, a single flanged pulley we proceed as
follows. We make a cup in the manner already described but of greater depth
than the cup to be made into a flangeless pulley and we force the bottom of the cup
inwards but only to such a depth as to form a diaphragm which in the finished

page_text: pulley will be midway between its ends. The open end of the cup is expanded into
a plane at right angles to the axis of the cup and there is thus formed a pulley
having a flange at one of its ends. Or we operate on the cup so as to form the
flange at that end of the said cup at which by the forcing inwards of its bottom to
make the middle diaphragm, there is a double thickness of metal. The flange
formed has a greater strength than the flange formed by the method of manufacture
last described.
In making, according to the said invention a double flanged pulley we proceed as
follows. We take two of the single flanged pulleys, made preferably by the method
last described, and making their open ends true by turning or otherwise, place the
said open ends together edge to edge and secure the two pieces together by
rivetting the diaphragms of the two parts to the hollow boss which engages with
the shaft.
We will now proceed to describe with reference to the accompanying drawings
the manner in which the said invention is to be performed.
In making a plain or unflanged pulley from a single disc of sheet iron or steel and
a separate central shaft boss, we proceed as follows. We take a circular disc of
the kind represented in Figure 1 and by means of the ordinary drawing through
process we raise from the said circular disc the shallow cylindrical cup represented
in section and plan in Figure 2. We next operate upon the cup Figure 2 by dies
and pressure so as to force the bottom of the cup inwards until it occupies a position
midway or nearly midway between the two ends of the cup as illustrated in section
and plan in Figure 3. There is thus produced a short tube having a flat diaphragm a
at or near its middle, the side 6 of the tube, forming the rim of the finished pulley,
having a double fold or double thickness of metal throughout one half, or nearly
so, of its length and only a single thickness of metal in the other half of its length.
The diaphragmed cup having a double thickness of metal at about one half of the
length of its cylindrical part or rim, is converted into a plain or unflanged pulley
in the manner shown in section in Figure 4 and plan in Figure 5. That is to say,
a central hole d is made in the diaphragm a and to the said diaphragm a hollow
boss e for taking on to the shaft is affixed by rivetting the collar e² of the said
boss e to the diaphragm as represented. In the finished plain or unflanged pulley
Figures 4 and 5, the rim of the pulley is marked b and the double thickness
of metal at one half of the said rim is marked c.
Instead of making the diaphragm of the cupped body of the pulley flat, it may
be dished or domed as represented in section in Figure 6; Figure 7 represents in
section and Figure 8 in plan a plain or unflanged pulley made from the dished cup
Figure 6. In this modified pulley the hollow shaft boss e is rivetted to the dished
diaphragm a by the radial arms e3, e3 of the boss instead of by a ring or collar on
the said boss.
Figure 9 represents in section and Figure 10 in plau a plain or unflanged pulley
made according to this invention, the whole of the rim of the said pulley having
a double fold or double thickness of metal and being strengthened by a separate
ring or hoop inserted between the folds of the thickened rim. In making this
pulley
we take two cupped discs f, g perforated at their middles, the said cupped
discs having cylindrical sides or folds f, g of double thickness of metal to form
the rim of the pulley, the abutting parts of the outer cylindrical folds f³, g
meeting in the middle of the rim as indicated by the dotted line; h is the separate
ring or hoop inserted between the cylindrical double folds of the rim for
strengthening it. In putting the parts of this pulley together the cylindrical
double folds 12, g of the two cupped discs f, 9 are passed, from opposite sides, on
to the separate ring or hoop 4 and the hollow boss e, e3 then rivetted between the
bottoms, g of the two cups. The pulley is thereby finished. The whole of the
rim of this pulley has a double thickness of metal and is further strengthened by
an internal separate ring or hoop.
Or instead of each cup having an outer fold of the length of one half of the rim
for forming the double thickness of the rim, one only of the cups may have an

page_text: outer fold or double thickness of metal which outer fold in this case is of the
length of the complete rim.
A pulley of this kind is illustrated in Figure 11.
In making this pulley we take a cupped disc f of the kind represented in
Figure 6 having the outer fold 3 of the double fold of the length of the rim and
we take another cupped disc i without an outer fold or double thickness of metal
for the rim and we join the bottom of the outer fold of the cup f to the bottom
of the single cylindrical rim part of the other cup i as represented at fin
Figure 11. Before the fold f3 of the cup is joined to the single cylindrical rim
part of the cup i the hollow boss e, e3 is rivetted between the bottoms f1, of the
two cups f, i.
The outer fold 3 of the rim instead of being flat may be crowned or made
convex as represented in Figure 13.
Instead of joining the double folds of the rims of the two cups f, g Figure 9 by
a butt joint they may be joined by an overlapping joint as represented in Figure 14
where the overlapping joint is marked k; or the meeting edges of the double
folds of the rims of the cups may be headed as represented in Figure 15 and
marked; or the meeting edges of the double folds of the cups may be locked
together at m as shown in Figure 16.
In making a single flange pulley, according to the said invention, we take a
diaphragmed cup of the kind represented in Figure 3 or Figure 6 but having the
outer fold of greater depth than either of those cups and we expand the open end
of the cup into a plane at right angles to the axis of the cup and thus, after the
shaft boss has been connected to the diaphragm, form a pulley having a flange at
one of its ends as represented in Figure 17, where the flange at one end of the rim
of the pulley is marked n.
1
The parts of the single flanged pulley Figure 17 which we have not described
are marked with the same letters of reference as corresponding parts of the
unflanged pulley Figures 7 and 8.
In making a double flanged pulley according to the said invention we take two
sheet metal cups having domed or dished bottoms and bend the open end of each
cup at right angles to its axis so as to produce a flange at the open end as repre-
sented at p, p Figure 18. We then bead the edges of the flanges as represented
at 9, 9 Figure 19 so as to strengthen them and finish the pulley by rivetting
between the domed or dished bottoms of the cups, the hollow shaft boss e, e as
represented in section and plan in Figure 20.
Double flanged pulleys may also be made from cupped discs of the kind repre-
sented in Figure 17 by placing the unflanged ends of the two cups edge to edge and
rivetting the boss between their diaphragms.
Having now particularly described and ascertained the nature of the said inven-
tion and in what mauner the same is to be performed we declare that we claim
as the said invention of "Improvements in the manufacture of metallic driving
pulleys and other like pulleys'
First. Making the bodies of plain or unflanged pulleys from shallow sheet
metal cups the bottoms of which cups have been forced inwards so as to produce short
cylindrical tubes having diaphragms at or about their middle and a double thickness
of metal throughout about one half of the length of their cylindrical sides or rims
and only a single thickness of metal on the other half or part of the said cylindrical
sides or rims, the sheet metal bodies so made being converted into driving or like.
pulleys by rivetting to their diaphragms, hollow bosses for taking onto the
shafts with which the said pulleys are to be used substantially as hereinbefore
described and illustrated in Figures 1, 2, 3, 4, 5, 6, 7 and 8 of the accompanying
drawings.
Secondly. Making the bodies of plain or unflanged pulleys from two shallow sheet
metal cups having a double fold or thickness of metal at their cylindrical sides or
rims and with or without a separate strengthening ring or hoop fitted between the

page_text: double folds or walls of the said shallow cups, the said cups and ring or hoop
being secured together by the rivetting between the bottoms of the said cups of
the hollow shaft boss of the pulley substantially as hereinbefore described and.
illustrated in Figures 9, 10, 14, 15 and 16 of the accompanying drawings.
Thirdly. Making the bodies of plain or unflanged pulleys from a sheet metal
cup of the kind claimed in Claim One having a double fold or thickness of metal
throughout one half only of the length of its cylindrical side or rim and also of a
second sheet metal cup the rim of which has a single thickness of metal, the outer
or single rim of the first named cup being joined to the edge of the single rim of
the last named cup substantially as hereinbefore described and illustrated in
Figures 11, 12 and 13 of the accompanying drawings.
Fourthly. Making the bodies of single flanged pulleys from a short sheet metal
cup of the kind claimed in Claim One by bending one end of the cylindrical part
or wall of the said cup at right angles to the axis of the cup so as to produce a
flange at one end of the pulley substantially as hereinbefore described and illustrated.
in Figure 17 of the accompanying drawings.
Fifthly. Making the bodies of double flanged pulleys from two flanged sheet.
metal cups either with single or with double walled rims and securing the said cups
together by the rivetting of the hollow shaft boss between their bottoms sub--
stantially as herein before described and illustrated with respect to Figures 17, 18,
19 and 20 of the accompanying drawings.
Dated this 22nd day of January 1897
TAYLOR & CHALLEN, LIMITED.
J. S. TAYLOR,
S. W. CHALLEN,
}
Directors.
STEPHEN WILLIAM CHALLEN.
WALTER BERNARD CHALLEN..