Improvements in Pneumatic Tyres, and in Rims therefor.
Year: 1896

page_text: Improvements in Pneumatic Tyres, and in Rims therefor.
I, PIERRE MERCIER, of 81, Rue Lemercier, Paris, France, now residing at
33, Percy Street, Tottenham Court Road, London, England, Pharmaceutical
Chemist, do hereby declare the nature of this invention to be as follows:-
This invention relates to covers or bands for pneumatic tyres, and in wheel rims
for same.
According to the said invention the rim, (the edges of which are beut inwardly
so as to constitute a support in the form of a hook under which flanges of the cover
attach themselves and find a resting place,) is curved in the centre, thereby forming
a convex on which, points of the stiffened flanges of the cover or band will be
supported.
In addition, the rin (which is curved as aforesaid) has a central ridge, thus
forming two cavities, inside of which the spokes of the wheel are fixed.
The width of the cover or band is such, that, when in position the edges are not
in contact with each other, so as to avoid the compressing of the air-chamber,
when attaching, or inflating it.
By this arrangement I obtain a cover or band with extremely rigid and solid
rims, and in which, simultaneously, the air-chamber (which is kept in place by the
stays and the protected arched central piece of the rim) is absolutely safeguarded
against friction or laceration from the spokes.
HUGHES, SON & Co.,
38, Chancery Lane, W.C., Agents.
I, PIERRE MERCIER, of 81 Rue le Mercier, Paris, France, now residing at
33, Percy Street, Tottenham Court Road, London, England, Pharmaceutical
Chemist, do hereby declare the nature of this invention and in what manuer the
same is to be performed to be particularly described and ascertained in and by the
following statement :-
This invention relates to covers or bands for pneumatic tyres, and in wheel rims
for same, and has for object to provide a rim that while capable of securely holding
therein a tyre (the cover of which is constructed according to this invention), will
not be liable to lacerate or otherwise injure the air-tube of such tyre.
And in order that this my said invention may be the more readily understood
and carried into practical effect, reference is hereby made to the accompanying
sheet of illustrative drawings in which:
Fig. 1. is a perspective view of a portion of the rim shewn separate, and
Fig. 2. a section of same shewing the cover or band in position.

page_text: Referring to the drawings, a are the edges of the rim, such edges being beut
upwardly and inwardly so as to constitute a support in the form of a hook under
which the stiffened or thickened flanges 6¹ of the cover or band b attach themselves
and find a resting place.
The said rim is curved in the centre to form a convex a', upon which the
opposing edges 62 of the cover or band b are supported.
By curving the rim b in the manner before mentioned, two grooves or cavities a³
are formed within which the spokes c are fixed.
The width of the thickened portions of the cover or band b is such, that when in
position the edges 62 are not in contact with each other.
By this means the compressing of the air-chamber (not shewn) when the latter is
being attached, or inflated, is entirely prevented.
By the arrangement described and shewn, I obtain a cover or band possessed of
extremely rigid and solid rims, and one in which the air-chamber (which is kept
in position by the stays and the protected arched central portion a¹ of the rim a)
is absolutely safeguarded against friction or laceration from the heads of the
spokes c.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. The improvements in pneumatic tyres and in rims therefor, substantially as
described and shewn.
2. In pneumatic tyres and rims for receiving same, the thickened or stiffened
flanges of the band or cover in combination with a rinn bent upwardly and inwardly
at the edges; given a convex form in the centre, and having a longitudinal groove
or recess on each side of such central convex portion, substantially as and for the
purpose specified and as illustrated by the drawings.
Dated this 8th day of February 1897.
HUGHES, SON & Co.,
38, Chancery Lane, W.C., Agents for the Applicant.