IMPROVEMENTS IN DRIVING AND OTHER PULLEYS AND. WHEELS "
Year: 1882

page_text: LETTERS PATENT to George Ernest Sherwin of Aston near Birmingham in
the County of Warwick Manufacturer, for an Invention of "IMPROVEMENTS
IN DRIVING AND OTHER PULLEYS AND. WHEELS
"
PROVISIONAL SPECIFICATION left by the said George Ernest Sherwin at
the Office of the Commissioners of Patents on the 14th October 1882.
GEORGE ERNEST SHERWIN of Aston near Birmingham in the County of
Warwick Manufacturer "IMPROVEMENTS IN DRIVING AND OTHER PULLEYS AND
WHEELS
"
My invention consists First of the following improvement in wrought iron split
or divided pulleys that is pulleys made in halves. In the said split pulleys as
ordinarily made the junction of the halves of the periphery or rim and the boss is
made in the same plane. According to this part of my invention I so connect the
said halves of the periphery or rim and boss that they break joint that is are not
joined in the same plane. To effect this I make each half of the periphery or rim
somewhat greater than a semicircle so that the edges of the said halves of the
periphery extend beyond the boss parts. By this construction the junction of the
halves of the periphery is situated in a different plane from that in which the boss
is situated and hence the strength of the pulley is much increased.
My invention consists further in making arm pulleys in the following manner.
I make each radial arm of the pulley of a doubled plate or piece of wrought iron
the doubled parts being parallel to one another and at a short distance apart.
These double wrought iron arms are secured at their closed or bent ends to the
interior of the rim of the pulley and at their open ends to the boss of the pulley.
The double arms described may be rivetted together midway between the boss and
periphery or rim. I so arrange these double arms in the pulley that the plates of
which the said arms are composed are in planes at right angles to the shaft on
which the pulley is fixed. By these means great strength is obtained in the
pulley and little resistance is offered to the pulley's motion. This part of my

page_text: invention is applicable to pulleys having either wrought iron peripheries or rims
or cast iron peripheries or rims and may also be applied to the making of fly
wheels gear wheels as well as to all kinds of driving and other pulleys and wheels.
My invention consists further in making pulleys of two wrought iron discs or of
a single disc to which is attached a cast iron periphery or rim
In making a pulley having two discs a projection is formed on the inner side
of the periphery or rim which projection fits between the two discs the discs and
periphery being connected together by rivets passed through the projection of the
rim and the discs.
In using a single disc the cast iron periphery or rim is made in two parts the
disc being secured between them by rivetting.
This part of my invention may be applied to the manufacture of fly wheels
band saw pulleys gear wheels and all kinds of driving and and other pulleys
and wheels.
The pulley and wheels described under the second and third heads of my
invention inay either be made solid that is in one piece or split that is in two or
manninnsa

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said George Ernest Sherwin in the Great Seal Patent Office on the
6th April 1883.
GEORGE ERNEST SHERWIN of Aston near Birmingham in the County of
Warwick Manufacturer. "IMPROVEMENTS IN DRIVING AND OTHER PULLEYS AND
WHEELS"
My invention consists, First, of the following improvement in wrought iron split
or divided pulleys; that is, pulleys made in halves. In the said split pulleys as
ordinarily made, the junction of the halves of the periphery or rim and the boss.is
made in the saine plane. According to this part of my invention I so connect the
said halves of the periphery or rim and boss that they break joint, that is, are not
joined in the same plane. To effect this I make each half of the periphery or rim
somewhat greater than a semi circle so that the edges of the said halves of the
periphery extend beyond the boss parts. By this construction the junction of the
halves of the periphery is situated in a different plane from that in which the boss
is situated and hence the strength of the pulley is much increased
My invention consists further in making arm pulleys in the following manner.
I make each radial arm of the pulley of a doubled plate or piece of wrought iron
the doubled parts being parallel to one another and at a short distance apart.
The doubled wrought iron arms are secured at their closed or bent ends to the
interior of the rim of the pulley and at their open ends to the boss of the pulley.
The double arms described may be rivetted together midway between the boss
and periphery or rim. I so arrange these double arms in the pulley that the
plates of which the said arms are composed are in planes at right angles to the
shaft on which the pulley is fixed. By these means great strength is obtained in
the pulley and little resistance is offered to the pulley's motion. This part of my
invention is applicable to pulleys having either wrought iron peripheries or rims or
cast iron peripheries or rims; and may also be applied to the making of fly wheels,
gear wheels as well as to all kinds of driving and other pulleys and wheels.
My invention consists further in making pulleys of two wrought iron discs or of
a single disc to which is attached a cast iron periphery or rim.
In making a pulley having two discs, a projection is formed on the inner side
of the periphery or rim which projection fits between-the two discs, the discs and
periphery being connected together by rivets passed through the projection of the
rim and the discs.
In using a single disc, the cast iron periphery or rim is made in two parts the
disc being secured between them by rivetting.
This part of my invention may be applied to the manufacture of fly wheels,
band saw pulleys, gear wheels and all kinds of driving and other pulleys and
wheels.
•
The pulleys and wheels described under the second and third heads of my
invention may either be made solid, that is, in one piece or split, that is, in two or
more pieces.
I will now proceed to describe with reference to the accompanying Drawing the
manner in which my invention is to be performed.
.
Figure 1 represents in front elevation a wrought iron split or divided pulley
made according to the first part of my invention; a is one half of the pulley and b
is the other half.. Instead of connecting all parts of the two halves a, b in the
same plane as usual, I make the rim or periphery of the half a at one side of the
said half project at c beyond the plane in which the pulley is split or divided
and similarly I make the rim or periphery of the half b project at dat, the side

page_text: opposite that at which the rim or periphery of the half a projects. A recess is left
at e in the half b for the projecting rim or periphery c on the half a to take in or
overlap and a similar recess f is left in the half a for the projecting rim or
periphery on the half b to take in or overlap. The two halves a, b of the pulley
when brought together are joined by rivetting or otherwise connecting the parts
ce and d, The junction of the halves of the rim or periphery is thus situated
in a different plane from that in which the. boss is situated so that they break
joint and hence the strength of the pulley is much increased.
•
Figure 2 represents in cross section a pulley provided with wrought iron double
arms constructed according to my invention and having a cast iron periphery and
boss; gg are the wrought iron double arms of the pulley, each arm consisting of
two plates placed parallel to one another and at a short distance apart, the said
plates being arranged in planes at right angles to the shaft on which the pulley is
fixed so as to offer little resistance to the pulley's motion. The snid double arms
3.9 are secured together by one or more rivets h. Upon the inner ends of the
several double arms g, g the boss i is cast or otherwise secured and upon the outer
ends of the several double arms g, g the rim or periphery k is cast or otherwise
secured.
Figure 3 represents in cross section and Figure 4 in side elevation a modification
of the pulley last described. In this modification each of the double arms g..g is
made of a single plate of wrought iron bent into the forked form represented.
The bent part g connecting the two branches of the double arm. constitutes a
bearing surface upon which the rim or periphery is supported and to which it is
fixed by rivetting or otherwise. The open end of the double arm is connected to
the boss. Or instead of making each of the double arms of the pulley, Figures 3
and 4, of a single plate, each arm may be made of two plates as seen in Figure 2
and the inner side of the periphery or rim may have a lug or rib of the kind
illustrated with respect to the disc pulley Figure G and marked p*, which lug or
rib, is situated between and secured to the several double arms of the pulley.
Figure 5 represents a wrought iron disc pulley made according to my invention.
In this pulley the body is formed of the two iron (or steel) discs m, m the edges of
which are truly turned so that the wrought iron rim or peripliery n bears evenly
on the said discs, the said rim or periphery being secured to the said dises in the
usual way. The discs m, m are situated at the distance apart required by the
width of the pulley to be made and the boss i is made of three (or more) parts, one
part being situated between the discs and the other parts on the outsides of the
discs as seen in the drawing. The parts of the boss are secured together and to the
discs by screwing, bolting or otherwise.
Figure 6 represents another pulley the body of which is made of two dises m, m
as before, described, but the cast iron rim or periphery p has a projection or rib p²
on its inner side which projection or rib fits between the two discs m, m. The rim
or periphery and discs are connected together by means of bolts, screws or rivets
passed through the projection or rib p and the said discs.
Figure 7 represents a divided disc pulley made in the manner last described.
where m, m are the half dises; p the cast iron rim or periphery and the projection
or rib fitted between the half discs. The peripheries of the halves of the pulley
may either be connected together by the method described with respect to Figure 1
or by any of the well known methods.
Figure 8 represents in cross section a pulley in which the body is made of a
single disc of iron or steel q; a divided periphery r, and a divided boss 8, 8.. The
divided periphery, is made in two parts each part having an inner flange
between which flanges, the disc q is placed. Bolts, rivets, or screws are passed
through the flanges 7%, and disc g to bolt or connect the whole firmly together.
The divided boss's is secured to the disc in the usual way.
Although for convenience of description I have described my several improve-
ments as applied to driving pulleys yet my said improvements may also be applied
to other pulleys and wheels as herein before explained......

page_text: Having now described the nature of my invention and the manner in which the
same is to be performed I wish it to be understood that I claim as my invention of
"Improvements in driving and other pulleys and wheels."
First The improvement in connecting the halves of split or divided pulleys and
wheels having wrought iron rims or peripheries hereinbefore described and illus-
trated in Figure 1 of the accompanying Drawing; that is to say, making the wrought
iron periphery or rim of each half pulley or wheel project at one side beyond the
line of the boss part so that when the halves of the pulley or wheel are joined
together, the projecting periphery or rim of each half pulley or wheel overlaps the
other half of the pulley or wheel for the purpose and substantially as described
and illustrated.
Secondly Making the bodies of pulleys and wheels of double arms of the
construction herein before described and illustrated in Figures 23 and 4 of the
accompanying Drawing; that is to say, making each double radial arm of a doubled
or bent plate of wrought iron or steel as in Figures 3 and 4 or of two separate
plates of wrought iron or steel fixed parallel to one another and at a short distance
apart as in Figure 2, the said plates of the double arms being arranged in the
pulley or wheel in the manner and for the purpose substantially as described and
illustrated
Thirdly Making the bodies of pulleys and wheels of two discs or half discs
substantially as herein before described and illustrated in Figures 5. 6 and 7 of the
accompanying Drawing, or of a single disc or half discs substantially as herein before
described and illustrated in Figure 8 of the accompanying drawing.
In witness whereof I the said George Ernest Sherwin have hereunto set my
hand and seal this third day of April in the year of our Lord one thousand
eight hundred and eighty three.
Witness, RICHARD SKERRETT
37 Temple, Street
Birmingham
GEORGE ERNEST SHERWIN (L.S.)