Improvements in Pneumatio Tires for Wheels of Oyoles, Motor- Cars, or other Vehicles.
Year: 1896

page_text: Date of Application, 25th Aug., 1896-Accepted, 28th Nov., 1896
COMPLETE SPECIFICATION.
Improvements in Pneumatio Tires for Wheels of Oyoles, Motor-
Cars, or other Vehicles.
JOHN MAXFIELD 326 Liverpool Road, London, N. Manufacturer 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 the improvement of pneumatic tires, for wheels of
cycles, motor cars, or other vehicles, and has for its principal object a ready
means of detaching the tire for repairs.
In describing my improvements reference is made to the drawings attached.
Similar letters of reference indicato like parts in all the drawings.
Figure 1, is a section of tire, rim and exhaust chamber, with the tire open.
Figure 2, is the same with the tire closed.
Figure 3, is the same with modified exhaust chamber, with tire open.
Figure 4, is with modified exhaust chambèr and tire closed.
In Fig. 1 the tire A consists of an outer cover only, no inner bag being
required, and is made of india rubber and canvas, similar to those now in use, or
other flexible material may be used, attached to one edge of the tire A is the
small exhaust chamber case B, this chamber is made of the same material as the-
outer cover with a thick top and bottom, and the sides are thin and more flexible
BO as to form a hinge, as shown in drawing. I secure to this chamber a small.
exhaust pump and valve for regulation of same, this pump is a permanent fixture..
On the opposite side of the wheel is secured and in communication with
chamber D, a valve for regulating the inflation of tire A. For inflating the tire
the ordinary pump is used.
Now when the tire A and chamber case B are placed on rim C, the loos0.
edge F is put in position, and the air is exhausted from chamber E, in consequence,.
the chamber case B, becomes flattened thereby forcing its side on to edge F, of
cover A, thus hermetically closing the chamber D, the tire is now ready for
inflating to the required pressure.
Figures 3 & 4, shew a modification of the exhaust chamber case B, which is
formed in the following manner. The two pieces G & G are made of hard though
flexible material, the edges of G¹ are acute angles and it is adapted to spring into.
the rim C as shown in Fig. 3. Between the two pieces G & G I construct a
chamber of any flexible material such as macintosh. One odge of the tire may
be secured to the exhaust chamber case as shown in Fig. 3, or both edges may be.
free as preferred. Thus when the tire A is placed in position the air is exhausted.
from chamber E and the tire is inflated as before.
I may use other modifications of the chamber case B, for securing the edge or
edges of the tire, and thereby forming hermetically closed chamber, without.
departing from the spirit of my invention.
B
It will be readily seen that these improved tires, consisting as they do of an.
outer cover only, can be easily opened and turned inside out for any necessary
repairs or for any other purpose.

page_text: Having now particularly described and ascertained the nature of my inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. In combination with a pneumatic tire, the exhaust chamber case B, for the
purpose of hermetically closing the outer cover and securing same to the rim.
2. In combination with a pneumatic tire the employment of an exhaust chamber
for hermetically closing the outer cover forming the tire.
3. In combination with a pneumatio tire the employment of an exhaust
chamber.
Dated this 25th day of Annet 1906
'JOHN MAXFIELD.