Improved Grip or Attachment Appliances for Pneumatic Tyre Covers.
Year: 1899

page_text: Date of Application, 9th June, 1899-Accepted, 22nd July, 1899
COMPLETE SPECIFICATION.
Improved Grip or Attachment Appliances for Pneumatic Tyre
Covers.
I, FELIX DENNIS, of The Railway Hotel, Church End, Finchley, County of
Middlesex, Hotel Proprietor, 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:-
-
This invention has for object, the construction and employment of straight
walled segmental trough or gutter shaped selvedges of a pneumatic tyre cover
in such manner that an interlock of one selvedge with that of the other
selvedge constitute the means for fixing the cover to or in the rim of a wheel
whether said rim be made to follow the contour of the base selvedge for a
perfect seat therein, or of a shape approximating thereto, or of a half round rim
which may be semi oval in cross section such as for the selvedge base to rest in
the hollow of the rim, and the lower bulges or under side portions of the cover
to have a lodgment against the side walls of such a rim due to the inflation
of the inner tube, the down or inwardly inclined pressure of which fixes one
trough or gutter shape of selvedge within the other, the interlocking being
effected by the straight walled surfaces of the trough or gutter shape of selvedge
whether such be secured on or to the selvedge proper of the canvas or sewn within
a casing, or by an overlap of the fabric, or inserted in a woven casing of the
canvas edging as to form part of such cover.
The trough or gutter shape with straight side walls may be in metal, in whale-
bone, or of a compound such as celluloid or the like moulded to the desired form
and lengths as to break joint when interlocked and thus to form a circle of
pieces with their ends in proximity, the fabric between or at the ends serving to
joint up the segments as a ring for easy and gradual insertion of the ring
segments into the rim of a wheel and also the easy and gradual removal of the
smaller diameter segments from the larger ones when a deflated tube has to be
removed from a wheel rim.
The invention will be clearly understood by reference to the annexed drawings.
Figure 1 section of cover laid out flat with a large straight walled trough or
gutter selvedge at one edge and of a smaller straight walled trough or gutter
selvedge at the other, both troughs being from the upper surface as shown.
Figure 2 a section of my cover partially wrapped or in position ready for
the interlock without the inner or pneumatic tube.
Figure cross section of my cover with the two straight walled troughs or
gutter shaped selvedges interlocked and having the inner or pneumatic tube in an
inflated condition.
Figure 4 shows in section a rounded trough or gutter of the smaller selvedge,
and Figure 5 section of the larger trough or gutter selvedge.
For the sake of clearness in the drawings, I have shown the trough or gutter
canvas casing. The troughs
in light without cross hatching enclosed in a
consist of rolled steel or a moulded material with hollows A, A', having wings
or flanges B. B', from the straight walls C, C₁, respectively the width apart of the
straight walls of the smaller to the larger being such that one fits the other

page_text: for their full depths for interlocking purposes when forced home or as shown at
Figure 3 to resist side pull and make the grip effective.
The troughs in segments are encased in the canvas casings D, D¹, which
canvas is here shown as part of the cover E with a rubber exterior and tread F.
G, Figure 3, is the pneumatic tube.
It will be understood that the canvas selvedges are continuous each as a ring
of the ordinary kind and the segmental troughs are passed singly through a
slit of the casing if it be woven and each segment is slid round within the
casing until the ends abut or nearly so. The casing can then be damped and by
an adhesive previously applied to the segments, the canvas can be pressed into
contact and be made to adhere to the segments, there being sufficient limpness
at the abutting ends as to permit of the troughs and selvedges being creeped or
worked in by hand for their location to a rim and of one within the other.
I do not propose to dispense with the inner or pneumatic tube G but for a
tubeless tyre the meeting faces of the canvas parts of the wings may have a
rubber solution applied to form an adhesion of one part to the other and so
make an airtight lapping.
If the pneumatic cover be used as a single tube tyre, the canvas selvedges as
well as the trough segments may be in segments and the ends of the canvas
segments may be arranged in lengths for the ends to overlap and so perfect the
ring shape of the selvedges when the parts are interlocked.
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 straight walled trough or gutter shaped appliances as a means for
interlocking and fixing by grip action the cover of a pneumatic tyred wheel,
as set forth and substantially as represented on the annexed drawings.
2. In or to the selvedge or prepared edges of a pneumatic tyre cover, trough,
or gutter shaped lengths of metal or other material which with the fabric in
close contact therewith constitute the means for attachment of one edge to or on
the other by the interlocking of the straight walled sides of such trough or
gutter shaped lengths, substantially as specified.
3. The construction and employment of straight sided walled and outer
winged trough or gutter shaped material as an affixture to the edges of a pneu-
matic tyre cover, said troughs or gutter shaped appliances having an interlocking
action in the manner specified.
4. The employment of interlocking trough or gutter shaped appliances in
combination with the canvas edges of a pneumatic tyre cover as the grip or
attachment thereof, substantially as specified.
VIXIO
ουαι και οι απο 1000.
H. GARDNER,
Patent Agent, 166, Fleet Street, London.
Agent for the said Felix Dennis.