Improvements relating to Resilient Tyres for Wheels.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements relating to Resilient Tyres for Wheels.
I, WILLIAM EDWARD CARMONT, of Helmsdale, Kingston on Thames, Surrey,
Engineer, do hereby declare the nature of this invention to be as follows: -
This invention has for object a special construction of resilient tyres for wheels
chiefly for use with heavy vehicles, motor cars, and the like for which wide
treads are necessary to bear the weight and to pass over tram rail grooves and
rough roads generally without skidding or being subjected to a slewing motion
as on inclined roadways.
For the purpose of my invention I prepare by rolling or otherwise a broad
gutter shape of rim which I secure to the felloe of an ordinary or extra wide
wheel.
i
The periphery edges of the wings of the gutter shaped rim are curved inwardly
and each is formed with a deep inner shoulder up and down or against which
segments constituting the tread have play. These segments in pairs are also of
gutter shape in cross section and inverted they are narrow compared to the
width of the rim and the inner wing of each has slots or recesses into which
portions of a rubber liner can be forced by keys or pegs driven in at the ends of
the segments, which keys or pegs in conjunction with the swellings of the rubber
into the slots of the segments constitute the means for fixing the tread segments
in position.
The rubber liner is specially shaped and has one or more slots or grooves in its
inner periphery to contain a rope core or cores to bear against the inner face of
the rim, the ridges of the undulatory surface of the rope being in contact to
prevent creeping action of the tread segments and rubber liner on the rim while
travelling.
The segments are in double ring fashion and the ends break joint to spread
the weight and to obtain a firm hold on the ground.

page_text: same is to be performed to be particularly described and ascertained in and by
the following statement:.
This invention has for object a special construction of resilient tyres for wheels
chiefly for use with heavy vehicles, mctor cars, and the like, for which wide
treads are necessary to bear the weight and to pass over tram rail grooves and
rough roads generally without skidding or being subjected to a slewing motion
as on inclined roadways.
For the purpose of my invention, I prepare by rolling or otherwise, a broad
gutter shape of rim which. I secure to the felloe of an ordinary or extra wide
wheel.
The periphery edges of the wings of the gutter shaped rim are curved inwardly
and each is formed with a deep inner shoulder up and down or against which
segments constituting the tread have play. These segments in pairs are also of
gutter. shape in cross section and inverted, they are narrow compared to the
width of the rim and the inner wing of each has slots or recesses into which
portions of a rubber liner can be forced by keys or pegs driven in at the ends of
the segments, which keys or pegs in conjunction with the swellings of the rubber
into the slots of the segments constitute the means for fixing the tread segments
in position.
!
The rubber liner is specially shaped and has one or more slots or grooves in its
inner periphery to contain a rope core or cores to bear against the inner face of
the rim, the undulatory or twists surface of the rope being in contact to prevent
creeping action of the tread segments and rubber liner on the rim while
travelling.
The segments are in double ring fashion and the ends break joint to spread
the weight and to obtain a firm hold on the ground.
My invention will be clearly understood by reference to the annexed draw-
ings.
Figure 1 section partly in perspective of a tyre of the foregoing description.
Figure 2 detached perspective views of two of the tread sections.
Figure 3 partial view of a wheel showing the double tread sections broken
jointed with each other to spread the bearing or pressure action over more than
one section and to obtain a firm unslipping grip on the road and also to prevent
a. jam or slewing injury to the tyre while passing on, or when diagonally cross-
ing the grooves of tram rails.
The wheel represented has wood spokes and felloes.
A, rim recured to the felloe B which receives the spokes C in the ordinary
manner. D, D, are the two side walls of the rim with incurved edges E, E, the
inner faces of which are flat and of sufficient depth to give steadiness to the rise
and fall of the tread sections F, F, these being in pairs and lying side by side in
the space formed between the deepened flat surfaces of the rim ends circumferen-
tially.
The tread sections are preferably from 4 to 8 inches in length and the two
rings of tread sections break joint with each other. The tread sections F, F, are
each of gutter shape and the ends of the outer walls G, G, are beaded inwardly,
as at H, H, the inner walls I, I, being plain at the edges but said inner side walls
are slotted, as at J, J, or only recessed in which the swellings or enlargements of
the rubber liner K, as the resilient body, becomes located in conjunction with
that effected by the outward swaging of the rubber under the beadings H, H, of
the walls G, G, by the keys L, L, which are forced into slits or grooves formed
for their reception in the moulding of the rubber liner K whereby each tread
section is located firmly and is prevented from dropping away. M, M, are ropes
inserted in grooves of the inner or rim facings of the rubber liner K to bear in
contact with the rim and which by their clinging action due to the twist or
braiding of the rope form many points of contact with the rim and by the grip
of the ropes M, M, against the rubber liner due to the compression of the rubber

page_text: when forced into rim effectually keep the ropes in contact and prevent what is
known as creeping i.e. the rubber liner and tread rings having a motion around
the rim independently of the rim itself.
The insertion of the rubber liner into the rim is effected mechanically in ‘a. well
known manner, and need not be here described.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what'
I claim is:
1. The employment of double tread tyre sections in a single gutter shaped rim
in conjunction with an undivided rubber liner, the rim having deep inner faced
surfaces and the tread sections provided with slots or hollows on the inner walls.
only as herein described and substantially as represented in the annexed drawings.
2. In double tread tyre sections held in place by keys, the employment of one
or more ropes within the rubber liner and bearing in contact, with the rim for the
purpose set forth.
The 23rd day of February 1899.
H. GARDNER,
Patent Agent, 166, Fleet Street, London,
Agent for the said William Edward. Carmont.