Improved Means for use in Securing Pneumatic Tyres to the Wheels of Velocipedes and Other Vehicles.
Year: 1898

page_text: Date of Application, 14th Mar., 1898-Accepted, 14th May,
1898
Improved Means for use in Securing Pneumatic Tyres to the Wheels
of Velocipedes and Other Vehicles.
I, HIPPOLYTE JOSEPHI LA FORCE, of 18, Rue Bacon, Paris, in the Republic of
France, Mechanical Engineer, 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:-
My invention relates to improvements in connection with pneumatic tyres and
has for its object to provide improved means for use in securing pneumatic tyres
to rims of velocipedes and other vehicles so as to prevent the said tyres from
slipping sideways therefrom and my invention is especially adapted for use with
pneumatic tyres of the kind I have described in the Specification of my prior
Letters Patent No. 27637 of 1897.
According to my invention I provide the rim of the wheel to which the pneumatic
tyre is to be applied with guiding parts and holders which can be projected from
the rim of the wheel and used both for guiding the tyre into position on the rim
and for holding it against the rim when in proper position thereon. I preferably
use four such guiding parts and holders to a wheel setting them on the rim at
equal distances apart. The guiding part is formed of a rod or shank having a
head constituting the holder which may be formed with recessed parts to retain
the tyre in position as hereinafter described or with arms or clasps or the like at
right angles to the rod or shank so that by turning the said rod or shank the arms
may be caused to engage the said tyre and hold it in position on the rim.
In the accompanying drawing I have shewn in section means according to my
invention for securing a pneumatic tyre to the rim of a wheel.
On the rim of a wheel at positions diametrically opposite each other, which wheel
is shewn with a metal tyre, holes 13 are formed each with its lower part 14 of
smaller diameter so as to form a shoulder 15. Passing through each hole is a
bolt 16 between the head 17 of which and the shoulder 15 is interposed a spring 19
which surrounds the shank of the bolt and tends to force the head of the said bolt
upwards. The head of the bolt is recessed on opposite sides for engaging with the
parts 4 and 5 as hereinafter described. The shank 16 is provided with a nut or
button 19 which rests on a metal washer 21, an elastic washer 20 being interposed
for preventing the entrance of water. The shank 16 carries a feather 22 engaging
in a groove 23 of the hole 14, for normally preventing rotation of the rod and
bolt. The head 17 of bolt can enter the rim 11, 12: to effect this the button or
nut 19 is drawn back so as to bring the block 22 out of the hole and the bolt is
then rotated so that the feather 22 rests outside of the groove 23 on the inner
circumference of the rim of the wheel, the length of the bolt being so adjusted that
in this position the head thereof is flush with or below the outer surface 12 of the
rim. It is projected by the action of the spring 19 when the block has been
returned to the groove 23.
When the head of the bolt 17 has been drawn into the rim of the wheel the
pneumatic tyre can be placed in position thereon in the usual manner. After

page_text: inflating the tyre, the head of the bolt is caused under the action of the spring 19
to project so as to enter between the two pieces 4 and 5 of the pneumatic tyre.
It will thus keep the tyre in position on the rim of the wheel when a partial
deflation thereof may have diminished its own adherence. If by reason of injury or
otherwise it is desired to dispense with the pneumatic tyre, the heads of the bolts
are drawn into the rim so that the wheel will then bear on its ordinary metal
tyre 12.
In order to avoid wear and tear by friction or cutting under the action of pressure
in the angular parts or recesses 24 and 25 of the air chamber of the pneumatic tyre
I may form these parts with folds or thickened parts on the tie band 10 which
fill up the said recesses and impart to the air chamber a regular shape.
In the drawing 1 indicates the air chamber of a pneumatic tyre and 2 the outer
covering thereof. 8 and 9 are metal rings in the tie band 10 for connecting the
tyre to the rim of the wheel as described in the Specification of my aforesaid
Patent No. 27637 of 1897.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. Improved means for securing a pneumatic tyre to the rim of a wheel, consist-
ing of a head or clasp or equivalent engaging device mounted on a shank or rod,
which engaging device can be projected from the rim of the wheel so as to engage
the tyre, with means for withdrawing the same into the rim of the wheel and
keeping it stationary therein; substantially as hereinbefore described.
2. The improved means for securing a pneumatic tyre of the kind referred to
against the rim of a wheel; substantially as hereinbefore described and illustrated
in the accompanying drawing.
Dated this 11th 1
1 1000
JOHNSONS & WILLCOX,
47, Lincoln's Inn Fields, London, W.C., Agents.