IMPROVEMENTS IN CARRIAGE AND BICYCLE WHEELS
Year: 1879

page_text: PROVISIONAL SPECIFICATION left by the said Duncan Campbell, at the
Office of the Commissioners of Patents on the 19th August 1879.
"
DUNCAN CAMPBELL, of Wolverhampton, in the County of Stafford, Manufacturer.
IMPROVEMENTS IN CARRIAGE AND BICYCLE WHEELS."
My improved wheel is constructed of iron, steel, or other metal in the form of a
half round or gutter section. The spokes are formed either two halves of each in'
one piece and secured at the felloe by rivetting, which I effect by taking a metal
tube and inserting it in the round form at the hub, splitting it and opening out the
two halves, turning them out into an arch form and revetting them at the felloe, or
by using half round gutter section metal entirely, or metal of a concavo convex
form forming a series of bows meeting back to back for the spokes and separating
towards the felloe where each is rivetted at its crown. At the hub these spokes
are gathered between two discs through which passes a screw fitted with nuts, so
that by tightening these discs on either side of the spokes they are firmly secured;
or I can reverse the position of the gutter or cocavo convex section metal for the
spokes, placing the concavity face to face instead of the reverse,; and thus producing
a complete circle for the spokes.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Duncan Campbell, in the Great Seal Patent Office on the 18th
February 1880.
DUNCAN CAMPBELL, of Wolverhampton, in the County of Stafford, Manufacturer,
"IMPROVEMENTS IN CARRIAGE AND BICYCLE WHEELS."
My improved wheel is constructed of iron, or steel, or other metal in the form of
a half round or gutter section. The spokes are formed, either two halves of each
in one piece and secured at the felloe by rivetting, which I effect by taking a metal
tube and inserting it in the round form at the hub, splitting it and opening out the
two halves turning them out into an arch form and rivetting them at the felloe, or
by using half round gutter section metal entirely, or metal of a concavo convex
form, forming a series of bows meeting back to back for the spokes and separating
towards the felloe where each is rivetted at its crown. At the hub these spokes
are gathered between two discs through which passes a screw fitted with nuts, so
that by tightening these discs on either side of the spokes they are firmly secured;
or I can reverse the position of the gutter or concavo convex section metal for the
spokes, placing the concavity face to face instead of the reverse, and thus producing
a complete circle for the spoke.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is an elevation of the wheel complete.
Figure 2, an elevation without the hub.
Figure 3 shews a view of the cap covering the hub.
Figure 4, an inside view of one of the discs forming the hub.
Figure 5 a tubular spindle by which all the parts are bound together, and which
receives the axle. (a) are the spokes formed of half round tubular iron in two
parts placed either face to face or back to back and rivetted at (b) to the felloe,
which is also formed of half round tubular iron; and when an elastic or non metallic
tyre is used this felloe has the concave side outwards, the dies shown in Figure 4 (of
which there are two) are formed with slots (c), so that when put together on each
side of the wheel the spokes are housed in the slots (c), a screwed tubular spindle,
Figure 5, is then passed through the discs and this spindle has either a fixed or
free nut (d) at one end, and at the other end a screw (e) on which is a free nut to
screw the parts all firmly together; after which the. covering cap (Figure 3) is
Bcrewed on to the screw (e) and the wheel is complete.
Having thus described the nature of my said Invention, and the manner in
which the same is to be carried into effect, I. claim. the Improvements in the
manufacture of carriage and bicycle, wheels, substantially as herein more fully set
forth and specified.
1.
:
In witness whereof, I, the said Duncan Campbell, have hereunto set my hand
and seal, this Seventeenth day of February, in the year of our Lord One
eight hundred and eighty.
..>
.
DUNCAN CAMPBELL. (L.B.)