Improvements in Pneumatic Tyres for Bicycles and other Vehicles.
Year: 1894

page_text: COMPLETE SPECIFICATION.
[Communicated from abroad by EDWARD S. FRAZIER, of Aurora, in the County
of Kane and State of Illinois, United States of America.]
Improvements in Pneumatic Tyres for Bicycles and other Vehicles.
I, HENRY HARRIS LAKE, of the Firm of Haseltine, Lake & Co. Patent
Agents, 45 Southampton Buildings, in the County of Middlesex, 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 bicycle tires, and has particularly to do with devices
for securing pneumatic tires in place upon the wheel rim. As is well known, the
ordinary pneumatic bicycle tires consist in general of an interior pneumatic tube
and an exterior covering therefor, which covering serves not only to protect the
interior of the tube, but also to secure the tire in place upon the wheel rim.
My invention has for its object to provide new and improved devices for securing
the tire upon the wheel rim, which devices will be so constructed as to permit of
the tire being readily removed when desired.
I accomplish the object of my invention as hereinafter specified and as illustrated
in the drawing in which
Figure 1 is an enlarged detail, being a vertical cross section of the tire showing
my improvements.
Figure 2 is a side view of a part of the device for locking the tire upon the
wheel rim.
Figure 3 is a plan view of the same, part being in section, and
Figure 4 is a section on line 4-4 of Figure 3.
5 indicates the wheel rim, and 6 a portion of one of the spokes. 7 indicates the
interior pneumatic tube. 8 indicates the exterior covering, which, as shown in
Figure 1, is double, its ends lying between the pneumatic tube and the wheel rim.
The covering 8 is held in place by means of wires 9-10, one in each doubled end of
said covering, as shown in Figure 1. The length of the wires 9-10 is such that when
they are tightened, as will be hereinafter described, the diameter of the ring formed
by the wire will be less than the diameter of the outer edges of the wheel rim.
The wires will therefore be prevented from slipping off the wheel rim.
pneumatic tube 7 when inflated exerts sufficient internal pressure upon said
wires to prevent them from moving inwardly. As the wires 9-10 are alike in
all essential particulars, it will be necessary to describe the method of tightening
only one of them.
The
11, indicates a semi-cylindrical or U-shaped plate, which is adapted to lie
within the doubled end of the covering 8, as shown in Figure 1, to one end
of which plate is secured one end of the wire 10.
12 indicates a smaller semi-cylindrical or U-shaped plate, which is adapted to
fit into the plate 11, and is pivoted thereto by pivots 13-14, as shown in
Figure 3. The pivots 13-14 are located near one end of the inner plate 12,
the arrangement being such that said plate 12 may be partially rotated so as to
bring either side uppermost. The other end of the wire 10 is connected to the
end of the inner plate 12 which is farther from the pivots 13-14, so that by
partially rotating the plate 12 in one direction or the other the wire 10 may
be tightened or loosened as the case may be. One end of the pivot 14 is
elongated sufficiently to project through the wheel rim, and has its end squared in
order to provide for its being turned by a key.

page_text: When the tire is secured upon the wheel rim, the ends of the wire arc in
the position shown in Figure 4. When the tire is to be removed the plate 12 is
turned over upon its pivot, moving in the direction indicated by the arrow in
Figure 4, and consequently slackening the wire 10 sufficiently to permit of its
being slipped over the edge of the wheel rim. The extent to which the wire is
loosened may, of course, be varied, depending upon the shape of the wheel rim;
and in cases where the wheel rim is concave, as shown in Figure 1, the slackening
will be very slight, as by deflating the tire the wire at one side of the wheel may be
slipped down to the center of the wheel rim, thereby permitting the wire at the
opposite side of the wheel to be slipped over the edge of the rim; but if desired
the wire may be so slackened that it may be slipped over the edge of the rim without
deflating the tire to any considerable extent.
I do not wish to limit myself to making the plates 11-12 of the specific shape
shown, as various modifications may be made without departing from the nature of
my invention. Instead of wire, any other suitable material may be used.
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, as communicated
to me by my foreign correspondent, I declare that what I claim is :-
1. The combination with a wheel-rim, a tire, and a tire-retaining wire, of a
swinging plate connected with one end of the wire and arranged within a pocket in
the tire, and an axially rotatable pivot-pin connected with said plate and projecting
through the said wheel-rim so that it can be turned from the exterior of the
wheel for swinging the plate, substantially as and for the purposes described.
2. The combination with a wheel-rim, a tire, and a tire-retaining wire, of a
U-shaped plate 11 arranged within a part of the tire and connected with one end of
the wire, a swinging U-shaped plate 12 connected with the other end of the wire,
and an axially rotatable pivot-pin connected with the said swinging-plate and
projecting through the wheel-rim, substantially as and for the purposes described.
3. The combination with a wheel-rim, a tire, and a tire-retaining wire, of a
U-shaped or channelled plate 11 arranged within a part of the tire and connected
with one end of the wire, an axially rotatable pivot 13 journalled in the said
plate and having one end extending through the wheel-rim and provided with
means for the application of a key for turning the pivot, and a U-shaped plate 12
secured to the pivot-pin between the sides of the plate 11, and connected with the
wire, substantially as and for the purposes described.
Dated this 14th day of November 1894.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.