Improvements in and relating to Wheels for Velocipedes.
Year: 1893

page_text: Dale v Application (mm
Complete Specification Left, 25th Feb., 1893-Accepted, 15th Apr., 1893
COMPLETE SPECIFICATION.
Improvements in and relating to Wheels for Velocipedes.
I, GEORGE DUDLEY CHAMBERLAIN, of 198 Florida Street, in the City of
Springfield, County of Hampden and State of Massachusetts, United States of
America, 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 improvements in velocipede wheels having pneumatic
tires. The objects of the invention are to provide such an improved construction
of tire and rim that the tire may be easily attached and detached from the rim,
inducing facility in the original construction and assemblage, and also in repairing;
and to devise a form of pneumatic tire wherein the abrasive action at its place of
support and connection at and near the edges of the rim will be prevented.
To these ends the invention consists in constructions and combinations of parts
all substantially as will hereinafter fully appear and be covered by the claims.
In the accompanying drawings examples of my improved rim and tire are
shown.
Figure 1 being a cross sectional view of the preferred form of the parts.
Figure 2 is a cross sectional and perspective view of the tire detached from the
rim.
Figure 3 being a cross sectional and perspective view of the rim.
Figures 4, 5, and 9 are views showing the various forms of devices which may
be vulcanized into or upon the tire covering to constitute the attachment eyes
thereof.
Figures 6 and 7 are similar views to Figure 1 but showing slight structural
differences to be hereinafter referred to.
Figure 8 is a cross sectional view of the rim of the construction comprised in
said Figures 6 and 7.
In the drawings, A represents the rim and B represents the tire regarded as a
whole, the latter comprising the air-tube, a, and the covering, b.
The tire is connected to the rim by the engagement of the eyes on one with
hooks on the other. The hooks are preferably provided on the inner wall of the
rim; and a hollow rim is preferably employed, although a hollow or double walled
rim is not a necessity. The hooks, d, are arranged in longitudinal series within
the edges of the rim, so that outwardly beyond them are the rests, x, x, for the
tire covering..
The air-tube of the tire has its inner or base portion contracted so as to lie on
the rim entirely between the opposite series of hooks. The specific form of air-
ring which I would have understood as the preferred one, (but to the exact contour
of which I do not desire to be limited) is that shown in the drawings wherein the
outer portion, 10, of the wall is in the form of a rounded arch, the base portions
inwardly converging in the exteriorly cancave sections, 12, 12, and united by the
narrow transverse section, 13. And the specific preferred form of the tread or

page_text: covering, b, is seen in a strip which may be transversely curved around to embrace
the outer and lateral side of air-tube, and which is thickened inwardly so as to
have the lobes, 15, fill, the. space between the edge rests, a, of the rim and the
inclined sections, 12, of the air-tube.
The eyes, f,, are firmly connected to the lobed portions of the tire-covering,
and project beyond the edgewise surface thereof to engage the hooks, d, d, on the
rim in such a manner that inflation of, and outward pressure by, the pneumatic
tire will perfect and render taut the connection.
The eyes, f, may be formed of bent wire, as seen in Figures 2, 4, 7, and 9, or
they may be constituted by perforated lugs which are edge extensions of a plate, f³,
of sheet metal.
The tangs, or shank portions, of these eyes may be incorporated or imbedded
within the tire section, b, at the time of vulcanization, or, as seen in Figure 2, they
may lie along the surfaces of the section which are supported on the rests, a, the
eyes projecting slightly beyond the corners.
It will be noted in Figure 1 that the lobes, 15, of the outer tire section, b, have
the inwardly projected curved ribs or lips, 17, which overlie the hooked portions of
the rim, standing as guards between the latter and the air-tube sections, 12, 12,
for the protection of these sections against any possible abrasive effect thereon by
.the hooks, during the use of the tire on a bicycle wheel.
In Figures 1 and 3 it will be observed that the rim consists of an outer main
section, j, transversely of arc or shallow trough form, and the secondary narrower
section, k, of reversed arc form with the edges upwardly and inwardly turned from
the longitudinal lines of support on and within the edges of the main section.
These upwardly and inwardly turned edge portions of the section, k, are
recessed at suitable intervals, as seen at 20, 20, to form therebetween the
hooks, d, d.
The hollow rim may be made in the form shown in Figures 6, 7, and 9, when it
is possible to construct it from a single blank of sheet metal, as well known. For
this form of rim the hooks may be separately formed and secured by brazing or
.otherwise.
The outer tire covering, b, is intended to be of india rubber in any of its elastic
vulcanizable compounds, and may or may not be cemented to the air-tube, as
desired.
The tire is capable of being readily detached and attached while partially or
wholly deflated; and when in use the edge lobes, 15, of the said outer covering
section effectually cushion the adjacent portions of the air-tube which are opposite
the edges of the tire, and which portions have heretofore been found most liable
to break open. The outer cover section may be thickened at the tread, as shown,
or may be of any desired form and dimensions.
Having now particularly described the nature of my said invention and in what
manner the same is to be performed I declare that what I claim is :-
1. The combination with a rim having between its one edge and center longi-
tudinal line a longitudinally arranged series of separated hooks, of a pneumatic
tire comprising an air-tube of suitable cross sectional form but having the walls
thereof at each under side convergent towards the median longitudinal line at the
inner periphery of the air-tube whereby the base thereof is so narrowed that it
has its support only upon the middle portion of the rim, and a section which
covers the tread and sides and has a seat at its opposite edges on the rim outside
of the air-ring base one edge being suitably connected to the rim, the said cover
section being provided at its other edge with a series of eyes to engage said hooks,
for the purpose set forth.
2. The combination with a rim having between its opposite edges and its center
two series of longitudinally arranged hooks, of a pneumatic tire comprising an
air-tube of suitable cross-sectional form, but having the walls thereof at each
under side covergent toward the median longitudinal line at the inner-periphery

page_text: of the air-tube whereby the base thereof is so narrowed that it may have its seat
upon the rim wholly between the two rows of intermediately arranged hooks, and
the section which covers the tread and sides and has a seat at opposite edges on
to engage
the rim outside of the air-ring base and provided with a series of eyes
said hooks, substantially as and for the purpose set forth.
3. The combination with a rim having between its opposite edges and its center
two series of longitudinally arranged hooks, of a pneumatic tire comprising an air-
tube of suitable cross-sectional form but having the walls thereof at each under
side convergent toward the median longitudinal line at the inner periphery of the
air-tube whereby the base thereof is so narrowed that it may have its seat upon
the rim wholly between the two rows of intermediately arranged hooks, and the
section which covers the tread and sides which has its edge portions thickened and
has a seat at opposite edges on the rim outside of the air-ring base and provided
with a series of eyes to engage said hooks, substantially as and for the purpose
set forth.
4. The combination with a rim of an air-tube having an arch-shaped top, 10,
with a base formed by converging sections, 12, 12, with a narrow uniting section, 13,
to rest centrally on the rim, and an elastic covering for the air-tube having the
thickened edge-portions or lobes, 15, 15, which lie between the marginal sections
of the rim and said sections, 12, 12, and are secured to the rim, substantially as
described.
5. A rim for a bicycle wheel consisting of a main or outer section, j, of trough
or arc shape, and the secondary narrower section, k, of reversed arc form with the
edge portions upwardly and inwardly turned from the longitudinal lines of support
on the main section and having the openings formed therein from the edges to
constitute there between the hooks, substantially as described.
6. A rim for a velocipede wheel consisting of a main or outer section, A, trans-
versely of arc or trough form and the secondary section of reversed arc-form
supported within the borders of the main section whereby the outlying portions of
the main section constitute marginal tire supports and said secondary section having
edge portions thereof upwardly and inwardly extended to constitute longitudinal
series of hooks, in combination with a tire comprising an air-ring with a narrowed
base resting between the hooks, and the covering having its edge portions resting
on said marginal supports and forming elastic base supports under each side of the
air-ring, substantially as set forth.
7. The combination with the rim having edge rests as t, and hooks therewithin,
of the tire comprising the air-tube, a narrowed base to rest on the rim within the
space between the hooks and the outer covering having the eyes to engage said
hooks and provided with the edge lobes, 15, 15, to lie upon and between said edge
rests, x, and the portions of the air-tube which are next to the rim-supported part,
with the inwardly extended lips, 17, 17, to overlie the hooks, substantially as and
for the purpose set forth.
1000