IMPROVEMENTS IN RAILWAY WHEELS
Year: 1875

page_text: PROVISIONAL SPECIFICATION left by James Haydon at the Office
of the Commissioners of Patents, with his Petition, on the 9th
April 1875.
I, JAMES HAYDON, of Shepherd Street, New Swindon, in the County
of Wilts, Engineer, do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN RAILWAY WHEELS," to be as follows.-
This Invention relates to improvements in railway wheels, and consists
in forming ring grooves within the inner periphery of a tire, and also
projecting lips or tongues, these having in some cases one angled or
coned face corresponding with angled or coned face ring projections
on the rim. The angles may be shaped different one from the other for
the surfaces, each to bear a different strain while the wheel is travelling;
I also form a lip on the outer face of the rim, so that the outer periphery
of it may form a bearing upon the inner periphery of the outer face of
the tyre. The lip and groove arrangement before described are held in
contact by a bar of metal bent into a ring shape while being inserted into
an annular groove formed in the tire, and into which a part of the ring
Is arranged to act as a key, the other portion being arranged to bear

page_text: against the outer face of the rim, and so to hold one body in contact
with the other in a permanent and a secure manner.
The bar is preferably of particular shape in cross section, and has one
or more angled faces on the same or on opposite sides, so that the bar is
thinner in the central line of its length by the rolling operation than at
the edges; one half of the bar with one of these angled faces becomes
inserted in the ring groove of the tire, so that the angled face is towards
the inner face of the wheel. Portions of the lip of the tire are then
forced into contact with the angled face of the key to hold.one secure to
the other, or the whole lip portion of the tire can be forced down as
desired.
against the outer face of the rim, and so to hold one body in contact
with the other in a permanent and a secure manner.
The bar is preferably of particular shape in cross section, and has one
or more angled faces on the same or on opposite sides, so that the bar is
thinner in the central line of its length by the rolling operation than at
the edges; one half of the bar with one of these angled faces becomes
inserted in the ring groove of the tire, so that the angled face is towards
the inner face of the wheel. Portions of the lip of the tire are then
forced into contact with the angled face of the key to hold.one secure to
the other, or the whole lip portion of the tire can be forced down as
desired.
I do not in all cases make the bar of different thicknesses in cross
section.
The main feature in the Invention is "keying "a tire into contact
with the run by a ring key, part of which is enclosed in the tire itself 1
and part projecting to bear against the rim.
According to a second method I employ square or different angled faced
projections on the tire rim, and dispense with the projecting bearing hip
of the rim. I form an angled face on the outer face of the rim so that
its angled face which corresponds to the angled face of the ring key may a
bear against it. The tire in this case as in the previous one may be so
formed that a lip on the inner face can be burred or hammered down
upon the ring key.