Improvements relating to Pneumatic Tires and Wheel Rims therefor.
Year: 1892

page_text: Date of Application, 15th Oct., 1892
Complete Specification Left, 13th July, 1893-Accepted, 19th Aug., 1893
PROVISIONAL SPECIFICATION.
Improvements relating to Pneumatic Tires and Wheel Rims
therefor.
I, REGINALD HADDAN of the Firm of Herbert & Co. Patent Agents of
18 Buckingham Street Strand W.C. London Civil Engineer do hereby declare the
nature of this invention a communication to me from abroad by Leon Van den
Broeck of 17 Rue Vleminckx Antwerp in the Kingdom of Belgium Manufacturer
to be as follows:-
This invention relates to pneumatic tires and wheel rims therefor and consists in
a novel form of rim adapted to receive and hold a specially formed tire in such a
way that when the inner pneumatic container is inflated the tire is firmly fixed in
place, while if the inner core or container is allowed to exhaust itself of air the tire
may be readily removed without effort and replaced on the rim. The invention
also relates to certain forms of inflatable cores.
The rim is so shaped out of sheet metal that in cross section it bears the following
shape; a central piece of the form of three sides of a square or oblong, open above,
the side branches being bent over and extended horizontally outward for a distance,
then downward to a point or points respectively below the lower horizontal portion
of the centre piece, and finally bent horizontally inwards and terminating.
This produces two chambers open inwardly below and located on each side of a
Ushaped chamber open above; the latter receives the spokes, the former receives
easily the two thickened rims of the U shaped rubber and canvas piece which forms
the outside of the tire.
The inner core is placed in this U shaped piece and the ends or side rims of the
latter which are thickened by an inserted piece of harder rubber and strengthened
by carrying over them the canvas which forms the inner surface of this piece, are
inserted in the lateral chambers of the rim aforesaid. This is very easily done.
The core is then inflated so as to distend the U shaped piece laterally, the effect of
which is to prevent the edges thereof from being pulled out of the chambers. The
tire is thus securely fastened to the rim of the wheel.
The inner core may be made in the form of corrugations circularly or spirally
arranged.
Dated this 15th day of October 1892.
HERBERT & CO.,
Agents to Applicant.
COMPLETE SPECIFICATION.
Improvements relating to Pneumatic Tires and Wheel Rims
therefor.
I REGINALD HADDAN of the Firm of Herbert & Co., Patent Agents of
18 Buckingham Street, Strand W.C. London do hereby declare the nature of this
invention, a communication to me from abroad by Leon Van den Broeck, of
17 Rue Vleminckx, Antwerp in the Kingdom of Belgium 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 pneumatic tires and wheel rims therefor and consists in
a novel form of rim adapted to receive and hold a specially formed tire in such a
way that when the inner pneumatic container is inflated, the tire is firmly fixed in
place, while if the inner core or container is allowed to exhaust itself of air the tire

page_text: may be readily removed without effort and replaced on the rim. The invention also
relates to certain forms of inflatable cores.
The rim is so shaped out of sheet metal that in cross section it bears the following
shape, a central piece of the form of three sides of a square or oblong, open above
the side branches being bent over and extended horizontally outward for a distance
then downward to a point or points respectively below the lower horizontal portion
of the centre piece and finally bent horizontally inwards and terminating.
This produces two chambers open inwardly below and located on each side of a
U shaped chamber open above; the latter receives the spokes, the former receives
easily the two thickened rims of the U shaped rubber and canvas piece which forms
the outside of the tire.
The inner core is placed in this U shaped piece and the ends or side rims of the
latter which are thickened by an inserted piece of harder rubber, and strengthened
by carrying over them the canvas which forms the inner surface of this piece, are
inserted in the lateral chambers of the rim aforesaid. This is very easily done.
The core is then inflated so as to distend the U shaped piece laterally, the effect of
which is to prevent the edges thereof from being pulled out of the chambers. The
tire is thus securely fastened to the rim of the wheel.
The inner core may be made in the form of corrugations circularly or spirally
arranged.
In the annexed drawing
Fig. 1 is a cross section of the metal wheel rim.
Fig. 2 is a cross section of the outer casing of the tire usually called the
envelope.
Fig. 3 illustrates the novel method in which this envelope and rim engage
together when the inner tube is inflated.
Fig. 4 shows the method of disengaging the envelope when the tube is deflated.
On Sheet 2 Figs. 1, 2 and 3 are longitudinal sections of different forms of
corrugated inner inflatable tubes.
The wheel rim is of the section before described, a recess is made in the base of
the part A for the spoke heads, and the letters CC indicate the gripping flanges
which terminate the recesses or chambers B B. The envelope D is doubled at its
edges over the harder rubber strips H H and therefore forms a thickened flange
in the general plane of the inside of the tire but projecting beyond or above the
plane of the outside of the tire. The canvas E extends over the inside of the tire
and over the flanges G G and terminates at F F or thereabouts.
It will be noticed that the width of entrance to each chamber B is sufficient to
easily admit the flange G or G' when presented thereto as in Fig. 4, but that when
the inflation forces the envelope outward, the back or inside of the flanges G G¹are
drawn against the bearing surface formed by the sides of the central depression A
which upholds the flanges G G' so that the inturned edges C C of the rim secure a
firm engagement with the envelope just under the outer projection of the flanges G G¹.
K represents an interior inflatable air tube of any usual kind.
In the corrugated air tubes shown in Figs. 1 to 3 of Sheet 2, the first is provided
with corrugations all turned outwardly, the second with alterate outward and
inward corrugations both these being circular or annular corrugations, the third is
provided with helically arranged corrugations all presented outwardly, but it can
equally be made with alternate outward and inward corrugations.
Having now particularly described and ascertained the nature of this said inven-
tion and in what manner the same is to be performed I declare that what I
claim is ;-
1.) The wheel rim adapted to hold an envelope of a pneumatic tire having the
cross sectional form comprising the central depressed chamber A the laterally
raised chambers B B and the inturned flanges C C substantially as herein-
described.
2.) The tire envelope or casing having on its ends two flanges extended in the

page_text: plane of the surface of the envelope, being flush with the inner surface but raised
abruptly and extended in a plane parallel to and above the plane of the outer
surface of the envelope, the said flanges being strengthened in rigidity by insertion
of harder material.
3.) The combination of wheel rim and tire envelope in which strengthened
flanges at the edges of the latter are adapted to be passed freely into lateral annular
chambers on the former and to bear against the inner walls formed by depression A.
whereby they are firmly engaged over the edges CC of said chambers substantially
as described.
4.) An inflatable air tube having annular or helical corrugations presented all
outwardly or alternately outwardly and inwardly substantially as set forth.
Dated this 13th day of July 1893.
HERBERT & Co.,
18, Buckingham Street, Strand, London, W.C., Agents to Applicant.