IMPROVEMENTS IN CAR WHEELS
Year: 1885

page_text: "
I JOSEPH PRITTS STEVENSON of Lewistown Mifflin County State of Penn-
sylvania one of the United States of America Engineer do hereby declare the'
nature of my invention for "IMPROVEMENTS IN CAR WHEELS 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 that class of car wagon or other wheels in which the
tire is constructed separately from but is to be secured to the centre or body of the
wheel and the object of my Invention is to so construct the said tire and body
that they can be firmly secured together in a simple manner, and without liability
of their becoming loose or causing excessive strain on the bolts.
I attain this object as hereinafter described reference being had to the accom-
panying drawings, in which
Figure 1 is a side view of one form of the tire separate from the body of the
wheel;
Figure 2 is a sectional view of the same form of tire, together with the body of
the wheel, to which it is secured;
Figure 3 is a side view of another form of tire ;
Figure 4 is a sectional view of the same tire, and the body of the wheel;
Figures 5 and 6 are similar views of a modification;
Figures 7 and 8 are similar views of another form of wheel, and
Figures 9 and 10 are side and sectional views of a further modification.
A is the body of the wheel, with a hub A' forming part thereof or secured
thereto in any suitable manner. B is the tire which is to be secured to the body
of the wheel so firmly that there will be no danger of the tire becoming loose on
the body of the wheel when in use.
The main feature of my Invention consists in making the joint between the tire
and the body of the wheel in two or more annular planes eccentric in respect to
each other.
In all the constructions illustrated in the drawings, the inner face of the tire is
shown as provided with an annular web or collar D, through which and through
the rim of the body of the wheel pass the transverse retaining bolts d. This web
or collar is preferably provided with an annular recess e on one side, into which
fits a corresponding flange f, on the extreme rim of the body of the wheel, as
shown in the constructions represented by Figures 1, 2, 7 and 8, but if preferred,

page_text: the recess and flange may be dispensed with, as in the constructions illustrated in
Figures 3, 4, 5, 6, 9 and 10.
In all cases, however, the annular planes of the joint should be eccentric to each
other, so that the tire is locked on the body, so far as circumferential movement is
concerned, and strain on the bolts d is thus prevented.
The annular planes of the joint may all be eccentric to the axis of the wheel as
well as to each other, as shown in the modification, Figures 9 and 10, but it is
preferable to make but one of said planes eccentric to the axis, so that but one
extra adjustment of the wheel in the lathe is required in turning or truing the
faces of the planes.
In the wheel shown in Figures 1 and 2, the joint has three annular planes a b
and c, the planes a and e being concentric with the axis but the plane b being
eccentric thereto.
In the wheel shown in Figures 3 and 4 the joint has but two annular planes a
and b the former being concentric and the latter eccentric and in the tire shown
in Figures 5 and 6, this is reversed, the plane b being concentric and the plane a
eccentric.
The wheel shown in Figures 7 and-8, has the joint in three annular planes, of
which the plane c only is eccentric..
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed I declare that what
I claim is
First: The combination of the body of a car wheel, with a rim or tire secured
thereto, the joint between the body and tire presenting two or more annular
planes, eccentric in respect to each other, as set forth.
Second-The combination of the tire of a car wheel, having an inner web or
collar, with the body of the wheel, secured to said collar, the tire and body of the
wheel having eccentric surfaces forming the joint between the two, as set forth.
Dated this 2nd day of June 1885.