Improvements in Rubber-tyred Carriage Wheels, and in the Method of Producing same.
Year: 1898

page_text: Date of Application, 1st Mar., 1898-Accepted, 4th June, 1898
COMPLETE SPECIFICATION.
Improvements in Rubber-tyred Carriage Wheels, and in the Method
of Producing same.
I, CARL TEICH, Director of the Prague Rubber Works Joint Stock Company,
of Vysocan, near Prague, in the Empire of Austria, 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:-
Rubber tyres hitherto in use have for the most part up to now been fixed to the
carriage wheels in such a way that the latter were embedded in tyres thus
This method is not very safe nor durable, since owing to the unequal expansion of
the tyres and the india rubber in changes of temperature, punctures occur in the
rubber; on the other hand if the rubber surrounding the wheel is pressed in too
hard, the sides of the tyre bend out and again cause a puncture in the fittings.
With my invention to ensure the better fitting and greater durability in the tyres
the rubber is vulcanised after the metal rim to be covered has been lined, and for
greater safety rivets are passed through the fittings.
In the accompanying drawing, Figure 1 is a part side view of a wheel comprising
my improvements. Figure 2 is a cross section. a is the metal tyre which is placed
on the rim R of the wheel, its side piece 6 being laid on said rim and fastened to
the same while in a heated condition by means of screws or rivets.
For ensuring the distance of the two side pieces ss of the metal tyre from one
another on the one hand, and on the other to give the rubber tyre or tread a firmer
hold, rivets c are fixed at suitable distances from one another; the elastic tyre d on
the steel rim is vulcanised. This vulcanising only takes place after lining the metal
tyre or rim a of the wheel with a hardened rubber mixture n. This hardened
rubber (vulcanite) has the property of making a very strong, united joining with
the iron. Round this bed of vulcanised rubber n the elastic tyre or tread d is
placed. The rubber tyre d then lies on the metal rim in its natural position.
In consequence of being placed on the hardened rubber bed n, there is no displace-
ment by pressure, and the rubber thereby gains great elasticity and firmness,
whereas the pressure of the circle of rubber into the rim itself has hitherto always
been the result.
The following is the way in which I carry out my invention:-First, india rubber
is placed as high as the rivets c are to be put, the hardened rubber bed n having
been previously placed in the metal rim, and on this bed rubber d is laid, the rivet
pins c being passed through and rivetted and then more rubber applied.
C
The
hardened rubber lining or bed n is put to the height of the rim, and on this bed,
rubber d is placed to the desired height above the wheel-rim. Then the prepared
rim is placed into a form of iron, with which it becomes treated by a vulcanising
press in order to finish the rim.

page_text: 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. In tyres for carriage and like wheels, the combination with the rim R, of
metal rim a having a downwardly projecting flange b, the lining n of hardened
or vulcanised rubber forming a bed for the rubber tyre or tread d, and rivets c,
all arranged substantially as herein described with reference to the accompanying
drawing.
2. In rubber tyres for carriage and like wheels, rivets c passed through the metal
and rubber tyres in the course of embedding the latter for the purpose of preventing
any defect in the form of the tyre and to firmly unite said rubber and metal tyres.
Dated this First day of March 1898.
JOHN P. O'DONNELL, Fel. Chart. Inst. P.A.,
Agent for the said Applicant,
70 and 71, Palace Chambers, Westminster, S.W.