IMPROVE- MENTS IN PULLEYS AND DRUMS
Year: 1885

page_text: I RICHARD RUSSELL GUBBINS of 17 Park Road New Cross in the county of
Kent Gentleman do hereby declare the nature of the said invention for IMPROVE-
MENTS IN PULLEYS AND DRUMS to be as follows:-
My invention relates to those kind of pulleys and drums used for transmitting
motion and so forth, in which the rim is made of wrought iron rivetted to the
wheel centre or " 'spider" which spider may be made of any suitable cast metal
although I prefer to use cast steel or homogenous iron castings some of which as
is well known possess the qualities of toughness and strength characteristic of
wrought iron and like it. may be welded. Wheels of this class as hitherto made
have no support to the rim between the extremities of the arms and it becomes
necessary in consequence to make the rim itself heavy enough to supply this
deficiency. In the improved wheel which I am now describing, each of the arms
terminates in a set of cruciform lugs, two of which are set with their surfaces
coincident with the interior surface of the periphery and to which the same is.
rivetted whilst the other two are set the reverse way or in a plane at right angles
to the axis of the wheel. These latter lugs are united between each pair of
spokes by couples of "bridge pieces" consisting of thin wrought iron bent edge-
wise to the sweep of the wheel and securely rivetted one on each side of the
aforesaid lugs, thus forming a double continuous ring all round the inside of the
rim which is thus thoroughly supported by it. Before I put on the rim I either
turn or grind the surface of the bridge pieces and lugs perfectly true.
As a modification of my invention I cast the Boss of the Pulley with a sufficient
number of arms long enough for a large range of diameters or the boss may be
cast of homogeneous iron capable of being welded to ordinary wrought iron with
very short spokes which may afterwards be sufficiently lengthened by welding bar
iron of proper section to them. In either case having bored out the boss to the
required size I strike a line on the spokes before it is taken out of the lathe and
cut or shear off the ends which project beyond such line. The spokes will thereby
be brought to exactly the same length and true with the centre of the buss.
I then secure a thin ring of flat bar iron similar to the bridge pieces before
described on each side of the arms and then either turn or grind their surface
perfectly true. In the case of very narrow wheels I secure the rim by a single.
row of rivets in the middle passing between the two supporting rings and rivetted

page_text: over a stout washer or plate which rests on them. In the case of wider wheels
I fasten lugs of angle iron on the sides of the supporting rings; before they are
ground and to them the rim will be rivetted. When required pulleys of this
improved construction may be made in halves or otherwise divided for convenience
of fixing. I also contemplate in some cases using angle iron instead of thin bar
iron for both bridge pieces and supporting rings and cast metal in some cases and
I distinctly intend this system of construction to include any metal which may be
cast, as phosphor bronze, common cast iron, cast steel, gun metal, homogeneous
iron, Nordenfelt's cast wrought iron and such like.
Dated this 27th 1
1007
WALTER A. BARLOW,
6, St. Paul's Churchyard, E.C.
COMPLETE SPECIFICATION.
Improvements in Pulleys and Drums.
I RICHARD RUSSELL GUBBINS of 17 Park Road New Cross, in the county of
Kent Gentleman, do hereby declare the nature of my said invention for IMPROVE-
MENTS IN PULLEYS AND DRUMS " 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 those kinds of pulleys and drums, used for transmitting
motion, and so forth in which the rim is made of wrought iron rivetted to the
wheel centre or "spider" which spider may be made of any suitable cast metal,
although I prefer to use cast steel or homogenous iron castings, some of which as is
well known possess the qualities of toughness and strength characteristic of
wrought iron and like it may be welded. Wheels of this class as hitherto made,
have no support to the rim between the extremities of the arms and it becomes
necessary in consequence to make the rim itself heavy enough to supply this
deficiency.
In the accompanying sheet of drawings Fig. 1 is a side elevation of a portion of
a pulley constructed according to this invention; Fig 1 is a sectional plan on
line 1, 2, of Fig. 1 looking at the inner side of the rim of the pulley and Fig. 1b a
detached view of the end of one of the arms.
Figs. 2 and 2a show similar views of a pulley constructed according to a
modification of the invention; Figs. 2b and 2c showing alternate mode of attaching
the rim, and Figs. 3 and 3º a further modification of construction.
In the improved construction of wheel or pulley illustrated in Figs. 1, 1*, and 1b
each of the arms a terminate in a cruciform set of lugs-two of which lugs a¹ are
set with their surfaces coincident with the inner surface of the rim or periphery b
and to which the said rim is rivetted, whilst the other two lugs a' are set the
reverse way or in a plane at right angles to the axis of the wheel.
These latter

page_text: lugs a are united between each pair of arms by couplings or "bridge pieces" c
consisting of iron bent edgewise or made to the sweep of the wheel and securely
rivetted one on each side of the aforesaid lugs a² so forming a double continuous
ring as clearly shown in Fig. 1° all round the inside of the rim b which is thus
thoroughly supported thereby. Before I put on the rim b I either turn or grind
the surface of the bridge pieces, and lugs perfectly true concentrically. In small
pulleys the lugs can be extended until they meet or nearly meet or overlap one
another.
According to the modification of my invention illustrated in Figs. 2 2* 2b and 2°.
I cast the boss of the pulley with a sufficient number of arms or spokes long
enough for a large range of diameters or the boss may be cast of homogenous iron
capable of being welded to ordinary wrought iron, with very short spokes which
may afterwards be sufficiently lengthened by welding bar iron of proper section to
them, arm a of Fig. 2 are shown of different sections by way of illustration.
I may make the boss of the pulley of Nordenfelts cast wrought iron in which case
it will be formed as required and the spokes be attached to it in any well known
or desired manner.
In either case having bored out the boss to the required size I strike a line on
the spokes, before the spider is taken out of the lathe and cut or shear off the ends
which project beyond such line. The spokes will thereby be brought to exactly
the same length and true with the centre of the boss. I then secure a thin ring
or rings of flat bar iron d, d¹, similar to the bridge pieces c before described on
each side of the arms and then either turn or grind their surfaces perfectly true
concentrically. In some cases such as for narrow wheels I secure the rim b by a
single row of rivets e. Figs. 2 and 2° passing through the middle of the rim b
between the two supporting rings d, d', (or they may be bridge pieces c) and
rivetted over a stout washer or plate f which abuts against the inner edges of the
rings d, d, (or bridge pieces c) as clearly shown in Figs. 2 and 2°.
In the case of wider wheels I may fasten lugs or angle pieces g on the sides of
the supporting rings d, d', before they are turned or ground and to the said angle
pieces g the rim b will be rivetted or the rings d, d' may be of angle iron the one
web whereof would furnish the rivetting lugs g and the other web would be
rivetted to the ends of arms a and the through rivets and washers ef may or may
not be used in such construction.
I may in some cases use angle or tee iron instead of thin bar iron for the bridge
pieces c or for the supporting rings d, d, or I may construct such bridge pieces c or
supporting rings d, d', of cast metal (of plain, angle, or tee section).
Another mode which I adopt and which is very suitable for small wheels is
illustrated in Figs. 3 and 3*. The lugs a³ are lengthened in the casting so that
they will meet and overlap each other between the spokes as shown at c¹ and the
joint will be made good with a rivet as shown. The separation between the
overlapping pieces is for the purpose of avoiding the evils of contraction in
the casting and for taking the wheel apart in the case of a "split pulley."
In Fig. 3 is shown in side elevation a split or divided pulley made according to
this invention whereof the divided boss will be held together by bolts h and the
rim b at its divided part will be screw bolted at h¹ to the opposite arms, and the
bridge pieces c are bolted at i so as to allow of the pulley being taken apart, and
to be put together as required.
In such construction and modifications of construction I distinctly intend to
include any suitable metal which may be cast as phosphor bronze, common cast
iron, cast steel, gun metal homogenous iron, Nordenfelt's cast wrought iron and
such like.
Having now particularly described and ascertained the nature of my invention
and in what manner the same has to be performed I declare that what I claim is
Firstly. In the manufacture of pulleys and drums as herein described the rim
supporting bridge pieces c or ring or rings d or d d between the extremities of

page_text: and in combination with the cast metal arms and rim bas and for the purpose
herein set forth.
Secondly. In the manufacture of pulleys and drums as herein described the rim
supporting bridge pieces c or ring or rings d, or d, d' in combination with the
lugs a¹ or a' and a² of the extremities of the arms for attachment and support of
the rim bas and for the purpose herein set forth.
Thirdly. In a pulley or drum the rim supporting bridge pieces c or ring or rings d
or d, d¹, between the extremities of the arms in combination with lugs or angle
pieces g serving together with the lugs a¹ of the arms a for attachment of the
rim of the wheel to the spider as herein specified.
Fourthly. In the manufacture of a pulley or drum as herein set forth with
bridge pieces c or rings d, d¹, the rivets e and washers f for attaching the rim b to
the spider whether alone or in combination with lugs or angles g or lugs a¹ or lugs
or angles g and lugs a¹ as set forth.
Fifthly. In a pulley or drum with cast metal centre the lugs of the arms
extended so as to meet or overlap as at c¹ Figs. 3 and 3ª as and for the purpose
herein set forth.
Sixthly. The manufacture of a split pulley or drum with halved or divided cast
metal boss and arms a with rim supporting pieces c with the rim b attached to the
arms substantially as herein set forth and shown by the drawings.
Seventhly. In the manufacture of pulleys or drums forming the centre or spider
of Nordenfelt's Patent cast wrought iron as and for the purpose set forth.