Improvements in Wheel Tyres.
Year: 1896

page_text: Date of Application, 19th June, 1896
Complete Specification Left, 18th July, 1896-Accepted, 29th Aug., 1896
Date VT
Complete Specification Left, 18th July, 1896-Accepted, 29th Aug., 1896
PROVISIONAL SPECIFICATION.
Improvements in Wheel Tyres.
I, FINLAY ALEXANDER MCRAE, of No. 577 St. Urbain Street, in the City
of Montreal, in the District of Montreal and Province of Quebec, Dominion of
Canada, Engineer, do hereby declare the nature of my invention to be as
follows:-
My invention relates to rubber tyres for vehicle wheels, more especially for
bicycles although it is applicable to wheels generally and has for its object to
produce a rubber tire that for all practical purposes will be as effective as those of
the pneumatic type without the inconveniences from puncturing attendant upon the
use of the latter, and even if my improved tyre be inflated it will be practically
impossible to puncture it so as to affect the entire body of air and even should the
whole of the air escape, the tyre will not collapse.
A tyre constructed according to my invention is composed of a plurality of tubes,
all, or any number of which may be inflated or not as desired. Two or more of
such tubes are arranged adjacent and parallel to each other and enclosed in an
outer tubular covering or filling of cylindrical exterior, the interior surface thereof
being in contact with and holding the inner tubes in place.
Encircling the periphery of the tyre may be an outer metal tread or band
preferably formed of wire netting.
Dated this 13th day of June 1896.
JOHNSONS & WILLCOX,
47 Lincoln's Inn Fields, Loudon, W.C, Agents
Improvements in Wheel Tyres.
I, FINLAY ALEXANDER MCRAE, of No. 577 St. Urbain Street in the City
of Montreal in the District of Montreal and Province of Quebec, Dominion of
Canada, Engineer, 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 :-
My invention relates to rubber tyres for vehicle wheels, more especially for
bicycles, although it is applicable to wheels generally and has for its object to
produce a rubber tyre that, for all practical purposes, will be as effective as those
of the pneumatic type without the inconveniences from puncturing attendant upon
the use of the latter, and even if my improved tyre be inflated it will be practically
impossible to puncture it so as to affect the entire body of air, and even should the
whole of the air escape the tyre will not collapse.
A tyre constructed according to my invention is composed of a plurality of tubes,
all, or any number, of which may be inflated or not, as desired.
Two, or more, of such rubber tubes are arranged adjacent, and parallel, to each
other and enclosed in an outer tubular covering or filling of cylindrical or approxi-
mately cylindrical exterior, the interior surface thereof, being in contact with, and
holding, the inner tubes in place.

page_text: Encircling the periphery of the tyre may be an outer metal tread or band
preferably formed of wire netting.
For full comprehension, of my invention, and the manner in which it may be
performed reference is made to the accompanying drawings, in which like letters
deuote corresponding parts, in the several figures.
Figures 1, 2 and 3, are cross sections of multi-tubular tyres of different forms,
made according to my invention;
Figure 4 a side elevation, partly in section, of a portion of a tyre shewing means
for inflating the several tubes thereof, if desired, and also provided with the metal
tread.
Although my invention comprises the use of two, or more, tubes contained within
an outer covering, I prefer to use three inner tuhes a, b, c, enclosed by the outer
tubular covering d, as shewn in Figure 1, the upper tube a, being somewhat larger
than the other two tubes b and c.
The exterior surface of the covering d is cylindrical or approximately so, or
shaped to fit the rim or felloe of the wheel, and its interior surface is formed to fit
against the inner tubes a, b and c.
Figure 2 shews a tyre having five inner tubes a b c and a² a enclosed by an
outer covering d, and Figure 3 shews an arrangement of four tubes a, b, c, c³,
similarly enclosed by the covering d.
As a further security against puncturing of the tyre, I may use an outer tread,
or band, of wire netting g of a curved cross section to take on to the periphery of
the tyre as shewn in Figures 1 and 4.
The preferred mode of manufacturing the said multi-tubular tyres consists in
arranging the inner tubes within a cylindrical mould of the requisite diameter or
capacity and then casting the external covering or filling d around them, the whole
becoming practically an integral tube, or a single tube, having the tubular channels
therethrough, may be run out.
If desired, one, or all, of the inner tubes may be inflated by providing each tube
with a separate nipple, or valve-controlled inlet, (not shown) of any usual con-
struction, those for the lower tubes communicating therewith by short lengths of
pipe, or tubing, m, as shewn in Figures 1 and 4.
The tyre when complete, is sprung over the usual bearing ring, or rim, of the
wheel, as indicated by dotted lines in Figure 1, or it may be secured in place in
any other convenient way.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what I
claim is :-
1. A wheel tyre composed of a plurality of tubes.
2. A wheel tyre composed of a plurality of tubes adjacent, and parallel, to each
other; and an enclosing tubular covering, for the whole.
3. A rubber wheel tyre having an outer metal tread.
4. A rubber wheel tyre having an outer tread of wire netting, for the purpose
hereinbefore set forth."`
5. A wheel tyre composed of a number of rubber tubes adjacent, and parallel,
to each other; with an outer tubular covering, or filling, enclosing such tubes, for
the purpose herein before set forth.
6. The manufacture of multi-tubular tyres, by first placing a series of inner
rubber tubes adjacent to, and parallel with, each other, and then forming an outer
covering, or filling, about them, for the purpose herein before set forth.
Dated this 18th day of July 1896.
JOHNSONS & WILLCOX,
47 Lincoln's Inn Fields, London, W.C., Agents.