Improvements in Pneumatic Tyres.
Year: 1893

page_text: Date of Application, 8th Aug., 1893
Complete Specification Left, 13th Apr., 1894-Accepted, 19th May, 1894
PROVISIONAL DEMULTICA LJON.
Improvements in Pneumatic Tyres.
We, NARCISSE PASSOT and HIPPOLYTE PASSOT of 200, Rue des Pyrénées,
Paris, France, Engineers, do hereby declare the nature of this invention to be as
follows:-
This invention relates to means of attaching pneumatic tyres to wheels whereby
they may be readily applied, removed, or adjusted.
Our invention is illustrated in the accompanying drawing, forming part of this
Specification, in which
Figure 1 represents a side view of part of the attachment; the rim of the
wheel being in section.
Figure 2 is a plan of the tightening device which it is preferred to use.
Figure 3 shew's the locking device.
Figures 4 and 5 are cross-sections of wheel rims of different forms having
pneumatic tyres secured thereto by means of this invention.
The invention consists in the combination, with the wheel rim d and with the
beaded edges 6 of the jacket a, of a tightening band c encircling the wheel rim d
and confining therein the thickened edges 6 of the jacket a, the ends of the band.
being connected by means whereby the effective length of the band may be
shortened so as to draw it tight around the rim and securely clamp the edges 6 of
the jacket between itself and the sides of the rim d, the effect of so tightening the
band being to cause the edges of the jacket to be drawn down within the hollow
of the rim and there retained.
For the purposes of this invention, the beaded edges 6 of the jacket a are
thickened by the insertion of a cane, wire, chain, cord, or other filling, and the
band c is of metal and may be tightened up by means of a rack, screw, or other
means. The wheel rim may either be of the V-form in section, shewn in Figure 4,
or of the concave form, shewn in Figure 5, or of other equivalent form. I is the
The tightening
ordinary inflatable air chamber enclosed within the jacket a.
band c is made preferably of ribbon steel and the preferred means of tightening
the band consists of a pinion e and rack 9 respectively mounted on the opposite
over-lapping ends of the band. The pinion is fixed on a spindle journaled in
the outer end of the band c and passing through an aperture in the middle of the
rim d, the pinion being situated within a longitudinally-slotted plate rivetted to
the other end of the band and toothed along one or both edges of the slot to
constitute a single or double rack with which the pinion e gears. The spindle h
has flats and upon it fits a locking wheel i adapted to engage with a stud j fixed-to
the wheel rim, for which purpose the locking wheel is free to slide on but turns
with the spindle h and the latter is screw-threaded to receive a milled nut to
retain the locking wheel in engagement with the stud. f is a guide for the lack
screwed to the outer.end of the band.
On rotating the pinion the end of the band carrying the rack is moved in
tightening up, the end upon which the pinion is mounted remaining stationary.
Dated this 8th day of August 1893.

page_text: COMPLETE SPECIFICATION.
Improvements in Pneumatic Tyres.
We, NARCISSE PASSOT and HIPPOLYTE PASSOT of 200 Rue des Pyrénées,.
Paris, France, Engineers, 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 relates to means of attaching pneumatic tyres to wheels whereby
they may be readily applied, removed, or adjusted.
Our invention is illustrated in the drawings accompanying our Provisional
Specification and forming part of this Specification, in which
Figure 1 represents a side view of part of the attachment, the rim of the wheel
being in section.
Figure 2 is an underside plan of the tightening device which it is preferred
to use.
Figure 3 shows the locking device.
Figures 4 and 5 are cross sections of wheel rims of different forms having
pneumatic tyres secured thereto by means of this invention.
The invention consists in the combination, with the wheel rim d and with the
beaded edges 6 of the jacket a, of a tightening band c encircling the whole circum-
ference of the wheel rim d and confining therein the beaded or thickened edges b
of the jacket a, the ends of the band being connected by means whereby the
effective length of the band may be shortened so as to draw it tight around
the rim and securely clamp the edges 6 of the jacket between itself and the
sides of the rim d, the effect of so tightening the band being to cause the edges
of the jacket to be drawn farther within the hollow of the rim and there
retained.
For the purposes of this invention, the beaded edges b of the jacket a are
thickened by the insertion of a cane, wire, chain, cord, or other filling, and the
band c is of metal and may be tightened up by means of a rack, screw, or other
means. The wheel rim may either be of the V-form in section, shown in Figure 4,
or of the concave form, shown in Figure 5, or of other equivalent form. is the
ordinary inflatable air chamber enclosed within the jacket a. The tightening
band is made preferably of ribbon steel and the preferred means of tightening
the band consists of a pinion e and rack respectively mounted on the opposite
overlapping ends of the band. The pinion e is fixed on a spindle h journaled
in the outer end of the band c and passing through an aperture at the middle of
the width of the rim d, the pinion being situated within a longitudinally-slotted
plate g, rivetted to the other end of the band and toothed along one or both edges
of the slot to constitute a single or double rack with which the pinion e gears.
The spindle has flats and upon the part of it which projects at back of the wheel
rim fits a notched locking wheel i adapted to engage with a stud j fixed to the back
of the wheel rim, for which purpose the locking wheel is free to be slid on but
turns with the spindle h and the latter is screw-threaded to receive a milled nut. k
to retain the locking wheel in engagement with the stud j. f is a guide for the
rack screwed to the outer end of the band.
On rotating the pinion e the end of the band carrying the rack g is moved
longitudinally in tightening up, the end upon which the pinion is mounted
remaining stationary.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, we declare that what we.
claim is :-
:
The herein described means of attaching pneumatic tyres to the wheels of

page_text: velocipedes and other vehicles, consisting in the combination with the beaded
or thickened edges of the jacket a and with the hollow wheel rim d, of a metallic
band e encircling the wheel rim and lying in the hollow thereof in such position
as to clip the beaded edges of the jacket between itself and the rim, the ends of
the said band being united by means substantially such as described whereby its
effective length may be shortened for the purpose of clipping the edges of the
jacket, as described.
N. PASSOT.
By A. M. & Wm. Clark,
H. PASSOT,
53, Chancery Lane, London, Chartered Patent Agents.