Improvements in Metal Tyres
Year: 1887

page_text: Date of Application, 28th Nov., 1887
Complete Specification Left, 4th July, 1888
Complete Specification Accepted, 10th Aug., 1888
ARTHUR SPEAR TANNER 39, Bridge Street Mile End Road, E. in the county
of Middlesex, Sign & Glass Writer do hereby declare the nature of this invention
to be as follows:-
This Invention has for its object Improvements in Metal Tyres for ordinary Wheels
for Road Vehicles to prevent them skidding against Tram rails or other obstacles as
is often the case with the Tyres now in ordinary use.
I make a metal Tyre by any suitable means with Indents formed in the outer
& Inner Arisses of that part of the Tyre which comes into contact with the road,
the above mentioned Indents are formed at an equal distance apart & for a suitable
distance along and opposite the one to the other, then follows a plain space of some
three or four inches to facilitate the welding or cutting and shutting as may
be required so that when the ariss of the Tyre comes into contact with a Train rail or
other obstacle the Indents grip the afore said Tram rail or other obstacle and readily
pass over required.
.
In some cases I form the Indents in the arisses and all round the Tyre.

page_text: · Improvements in Metal Tyres for Ordinary Wheels for Road
Vehicles.
I, ARTHUR SPEAR TANNER, Sign and Glass Writer, of 39 Bridge Street, Mile End
Road, London, E. in the County of Middlesex, do hereby declare the nature of this
invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
This invention has for its object Improvements in metal tyres for ordinary wheels
for road vehicles, to prevent the wheels skidding against tram rails or other obstacles,
as is often the case with tyres in ordinary use.
-
I make the tyre with indents formed by any suitable means, on both its inside and
outside edges, partly on the face of the tyre, that is, the side which comes into contact
with the road, and partly in the thickness of the tyre, and in plan of the form shewn
in Fig. 1. extending only partially through the tyre or chamfered as shewn in
Figs. 4. 5. 6. and 7. thus leaving the back of the tyre in contact with the felloe of the
wheel a plain surface. These indents are placed or formed at equal and suitable
distances apart according to the diameter of the wheel, and consist of part 1, which is
preferably straight but may be slightly curved, and parts 2 and 3 extending from
part 1 to the edge of the tyre. The bottom of the indent 4 is chamfered off, and may
be either flat, by preference, as in Fig. 4, slightly rounded as in Fig. 5, slightly
hollowed as in Fig. 6, or part round and part hollow as in Fig. 7.
These indents I place in some cases alternately on each side of the tyre as in Fig. 1.
and in other cases opposite to each other as in Fig. 3. The tyre so formed is shrunk
on the wheel and secured to the felloes in the usual way, it need not be wider than the
felloes, and will readily mount a projecting ridge such as the edge of a tram rail or
similar obstacle and enable the wheel to pass over such ridge and cross to one side
without skidding, equally well when going backward or forward.
Fig. 1. shows a portion of the tyre straightened out, with the indents placed s
alternately.
Fig. 3. shews a portion of the tyre straightened out, with the indents placed opposite
each other.
Fig. 2. shews a side view of Figs. 1 & 3, showing the recesses as seen when looking
at the edge of the tyre.
Figs. 4. 5. 6. & 7. are cross sections on the line A. B. shewing the forms of the
bottom of the recess.
Having now particularly described and ascertained the nature of my inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
The particular form and construction of tyre having indents as hereinbefore
described with reference to Figs. 1. 2. 3. 4. 5. 6 and 7.
July 4th 1888.