Improvements in Vehicle Wheel Tires.
Year: 1894

page_text: Date of Application, 2nd Feb., 1894-Accepted, 28th July, 1894
CUMI LEIE DUITION 1011.
Improvements in Vehicle Wheel Tires.
I, ROBERT SCOTT ANDERSON, residing at 342 Ontario Street in the City of
Toronto, in the County of York, in the Province of Ontario, in the Dominion of
Canada, Machinst, 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 removable wheel tires, and especially designed and
adapted for a pneumatic tire, that is to say, a hollow tire which is filled out or
distended by air, gas or other suitable substance.
The object of my invention is to provide a tire which may be simply and firmly
secured to the rim of a wheel and which may be easily removed therefrom when
desired.
I attain these objects by the mechanism illustrated in the accompanying drawing,
in which―
Fig. 1. is a view of a wheel tire embodying my invention. To more clearly
show the construction, the sheath and lining of the tire are broken away at points.
on the tire.
Fig. 2. is a view of the interchangeable and reciprocating wire or metal band.
Fig. 3. is a segment of a tire showing the coexisting and intersecting recesses or
pockets containing the interchangeable and coexisting wire or metal band at points
of coexistence and intersection.
Fig. 4. is a view of a segment of the tire and rim of a wheel with sections of tire
showing the position of the wires or metal bands at opposite points of the
circumference, when the tire is being removed.
Fig. 5. is a view of a section of the tire and rim showing the core inflated and
the tire and the interchangeable and coexisting wires or metal bands in position.
A. is the wire or metal. band.
B. is the lining or inner circumferential part of the tire sheath.
C. O are the recesses or pockets.
D. is the outer circumferential part of the tire sheath.
E. is the inflatable core.
F. is the wheel rim.
G. is the point of intersecting of the recesses or pockets and of the wire or metal
band.
Similar letters refer to similar parts throughout the several views.
The wire or metal band A.-Fig. 2. is proportioned in length so that when coiled
into two concentric circles the diameter of the circles so formed will, when equalized
correspond approximately to the diameter of the rim F. After the correct length
necessary to form these circles is determined the ends of the wire or metal
material A. are brazed or hooked together as may be desired.
The inner circumferential part or lining B. Fig. 3. of the tire D. has woven or
sewed into it recesses or pockets C. C'. These pockets or recesses extend con-
tinuously around the periphery of the lining or inner circumferential part B. of the
tire D. Fig. 1. one C. at the edge and the other C radially further in towards the
centre of the circumference. These pockets or recesses run nearly parallel to each
other except for a short distance at G. where they are joined into one, intersecting
and coexisting at that point in common. The lining B. containing the recesses or
pockets C. C is cemented or fastened to the outside circumferential part of the
ire D. in the usual manner.
By the term inner circumference of the tire sheath in this Specification, I mean,
077

page_text: the part of the tire sheath which bears on the rim, the part nearest to or facing
towards the axis of the wheel which is the centre of such inner circumference.
By the outer circumference of the tire sheath, I mean the circumference at or
towards the tread of the tire sheath, which outer circumference enlarges radially
when the tire sheath is filled out or distended as by an inuer inflatable core.
An opening is made at any point in the outer pocket or recess C¹ into which one
end of the wire A. is placed and then the wire A. is easily forced on until it has
traversed the pockets or recesses C. C¹ care being taken to guide it properly at the
intersection G. of the two pockets or recesses C. C Fig. 1. so that it will traverse
the pocket or recess C. before completing the circuit of the recess or pocket C¹.
The two ends of the wire A. after completing the double circuit are brought
together and hooked or fastened with any suitable device, and pressed back into
the pocket C. The opening in the pocket C' may be covered with a patch of
material same as the lining properly cemented on or attached thereto.
When the tire D. is placed on the rim F. and the core E. inflated as in Fig. 5.
the tire is distended radially from the rim F. the segments of the wire A. forming
the outer circle in the recess C₁ are also carried in the same direction and by the
pressure forced to the largest area of the recess C¹. To meet this demand upon
them these segments of the wire or metal band in the recess C¹ draw from the
segments of the wire or metal band C. compelling the latter to contract towards
the rim, carrying the edge of the tire D. with them and firmly securing the tire on
the rim.
Upon the deflation of the core E. the segments of the wire A. in the recess C₁
are relieved from the air pressure and are easily forced inward towards the rim F.
This causes the segments of the wire A. in the recess C. to enlarge radially from
the rim F. thereby releasing the edge of the tire D. from the rim F. Fig. 4.
From the foregoing description it will be seen that the self-fixing action and the
releasing action of my tire does not depend on the particular form of the rim used.
I prefer however, a rim with upturned edges (as in Fig. 5.) which will assist in
keeping the tire in place upon the rim.
It will be readily seen that the tightening of the segments of the wire or metal
band in the pocket or recess C. along the rim F. and the releasing of them there-
from is dependent on their coexisting with, or being connected with, the radially
enlarging outer segments of the wire or metal band in the recess or pocket C.
While I prefer to secure this result by using one wire in a double coil and with
the pockets or recesses having but one point of intersection and coexistenee, it cau
be obtained another way by two wires or bands and placing them in the pockets or
recesses having two points of intersection and coexistence.
To place the tire D. on the rim F. place one edge of the cover into its position
on the rim, then put the inflatable tube E. in and let it rest on the part of the cover
already placed on the rim. Put the other side of the cover on at one point start
around the edge of the rim from this point with the two hands in opposite directions
and the tire will easily slip into place.
To remove the tire deflate the tube and run the hands in opposite directions
around the cover at one point over the outside wire and press it towards the centre
of the wheel. This will enlarge the diameter of the inside wire and allow the
cover to be removed with the greatest of ease.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what 1
do claim as my invention and desire to secure by Letters Patent is―
1. The combination, in a vehicle wheel of a tire having an inflatable core, with
wires or metal bands having interchangeable or reciprocating parts all substantially
as set forth.
2. The combination, in a vehicle wheel of a tire having an inflatable core with
an inner circumference or lining having pockets or recesses which intersect and are
coexistent at one or more points substantially as described.

page_text: 3. In a vehicle wheel in combination with an inner inflatable core, a tire sheath
having an inner circumference or lining with peripheral pockets or recesses inter-
secting and coexisting with each other at one or more points containing wires or
bands coiled or so arranged that their parts will interchange or reciprocate and
secure the tire on the rim by the enlarging radially-i.e. from the axis of the wheel
of the tire from the expansion of the inuer inflatable core substantially as described.
4. In a vehicle wheel a tire sheath its inner circumference having peripheral
wires or metal bands which reciprocate or interchange their parts and tighten upon
the wheel rim by the filling out and enlarging radially-i.e. from the axis of the
wheel of the outer circumference of the tire sheath to which outer circumference
the inner circumference is in a manner so connected that the peripheral wires or
metal bands will interchange and reciprocate their parts and tighten the tire upon
the rim upon the filling out and enlarging radially of the outer circumference in
combination with the inner inflatable core which fills out the tire sheath and
radially enlarges its outer circumference substantially as set forth.
5. In a vehicle wheel a tire sheath having along and near its inner circum-
ference wires or metal bands coiled or so arranged as to pass each other at one or
more points in pockets or recesses which are intersecting and coexisting at one or
more points such wires or metal bands extending around and near the entire inner
edge of each side of the inner circumference of the tire sheath in combination with
an inner inflatable core which fills out and radially enlarges the circumference of
the tire sheath thereby causing the peripheral wires or metal bands to reciprocate
or interchange their parts so as to tighten the wire upon the rim of the wheel
substantially as described.
6. In'a vehicle wheel in combination with the rim and the inflatable core a tire
sheath with an outer and an inner circumference said inner circumference having
interchangeable and reciprocating wires or metal bands in pockets or recesses
which intersect and coexist at some one point which tighten and loose these
reciprocating or interchangeable parts on the rim upon the inflation or deflation of
the core substantially as described.
Dated at Toronto this 20th day of January 1894.
Signed in the presence of-
CH. CRAWFord.
E. B. W. BOOTH.
ROBERT SCOTT ANDERSON.