Improvements in Pneumatic-tyred Wheels for Carriages and like Vehicles.
Year: 1898

page_text: Date of Application, 30th Sept., 1898-Accepted, 12th Nov., 1898
COMPLETE-SPECIFICATION.
Improvements in Pneumatic-tyred Wheels for Carriages and like
Vehicles.
I; JOSEPH THEODOR WINCKELSETT, Engineer, of the Firm of Cambie & Winckel-
sett, 40, High Holborn, London, W.C., do hereby declare the nature of this
invention (which has been communicated to me from abroad by "Gummiwaaren
Fabrik, Russia," Gebrueder Freysinger, of Riga, in the Empire of Russia) and in
what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
The pneumatic tyres for carriage and like wheels hitherto known, which in all
essential particulars correspond with the well known pneumatic cycle styres and
only differ from them in so far that they are made stronger in proportion to
the heavier weight they are intended to support, suffer from the two-
fold disadvantage of not being sufficiently durable and of having the tendency
to disengage themselves from the wheel rim or felloe, the latter drawback being
especially noticeable when the vehicle has to negociate sharp curves.
The increased durability of the improved pneumatic tyre forming the subject
of the present invention, .results from the improved, construction of the tyre proper,
and also from its more secure attachment to the rim or felloe, consequent upon a
new method of securing it in position, and especially the novel construction of
the wheel rim.
The new or improved pneumatic tyre is distinguished from tyres constructed
according to hitherto known systems by its having a broad connecting-surface or
base and a narrow tread or road surface. Its cross section represents,
approximately, the form of a pointed equilateral arch, the apex of the latter
forming the tread or road surface, while its base rests upon the rim of the wheel.
Owing to this sectional formation the pointed tread or road surface of the tyre is,
during the time the vehicle is loaded and consequent upon the pressure.exercised
by the load, pressed back into the hollow interior, whereby friction and squeezing
of the sides, which in all cases must sooner or latter result in the tyre loosing its
air-tightness, is entirely obviated.
The rim or felloe of the wheel is so constructed as to allow of its being divided
into two separate parts, which may be easily and expeditiously connected or dis-
connected. The pneumatic tyre may be made to exactly fit the circumferential
length of the rim, so that the tyre can be placed in position with its broad surface
upon the rim without any expansion being required, whereby the mounting and
dismounting is greatly facilitated, and the displacement of the tyre upon the rim
or its leaving the latter during use is rendered-impossible.
In the accompanying.drawing
Fig. 1, represents a section of the improved pneumatic tyre attached to the
improved rim; it also shows, in projection, the interior surface of the rim or felloe,
and furthermore a side view of the latter with device for receiving the spokes
connecting same with the hub.

page_text: Fig. 2, represents in sectional view the improved tyre with its air valve, and the
valve-protecting cap secured thereto.
The pneumatic tyre is made in the form of an endless tube, the interior rubber
tube being surrounded by layer or layers b of suitable fabric, while the outer
rubber layer a, strengthened or thickened at the pointed tread or road surface,
encloses the two aforesaid component parts. A flat metal strip or band dis
imbedded in the base portion of the fabric layer or layers 6 for the purpose of
securing and firmly holding the tyre in position upon the rim. A short rubber
tube o, which may be strengthened by protective windings of fabric, is made to
pass through the base portion of a and through an aperture in metal band d into
the interior of the tyre and serves to receive the air valve n which may be secured
to said tube in any suitable manner.
The wheel rim or felloe, made of iron or any other suitable material, consists of
two separate parts e and f, which are made to fit closely into each other and io be
firmly held together by screws g as illustrated in the accompanying drawings. If
the screws g are loosened the left portion of the rim, c, can be removed, while
the right portion f, maintained in position by spoke-caps i, secured thereto by
screws h, in which the spokes are fixed, remains firmly connected with the hub of
the wheel.,, The tyre can easily be placed upon rim-portion e, the latter being then
passed over portion f and both secured to each other by screws g, a manipulation
occupying but few minutes and admitting of the tyre being mounted and dis-
mounted without necessitating the removal of the wheel from the axle of the
vehicle.
A metal
In order to admit of the tyre and its projecting valve n being placed upon rim-
portion, the latter is provided with a slot extending laterally from the side of
the rim far enough beyond the centre to make the said slot, together with a corre-
sponding slot in rim-portion e, form a proper passage for the valve tube.
plate l, also having a lateral slot in addition to a central aperture, is screwed onto
rim and is intended to receive and hold a cap m provided for the purpose of
protecting the valve from damage and from being manipulated by unauthorized
persons. The outer edges of both rim portions e and f are bent upwards, prefer-
ably at right angles, in order to provide a secure and reliable seat for the tyre.
Having now particularly described and ascertained the nature of this
invention and in what manner the same is to be performed, I declare that what
I claim is -
1) In pneumatic-tyred wheels for carriages and the like, the employment of an
inflatable clastic tyre, having at its base an endless flat metal band embedded in
a layer or layers of fabric, which band may however be dispensed with, the said
tyre having a cross section of approximately the shape of a triangle, two sides of
which form a pointed equilateral arch, the apex of the latter serving as tread or
road surface, while the base of the triangle is made to rest upon the rim of the
wheel, substantially as set forth and shown in the drawings.
2) in pneumatic-tyred wheels for carriages and the like, in combination with
the tyre forming the subject of Claim 1), the employment of a combination rim or
felloe, made of iron or other suitable material and consisting of two separate
portions e and f, adapted to be placed one over the other and to be fastened and
held together by suitable screws, the inner portion of of said rim carrying a
conveniently secured removable cap for protecting the valve tube, substantially
as described and illustrated in the accompanying drawings.
1000
CAMBIE & WINCKELSETT,
Warwick Buildings, 40, High Holborn, London, W.C.,
For the Applicant.