Improvements in Pneumatic Tyres.
Year: 1899

page_text: Date of Application, 10th Jan., 1899-Accepted, 10th June, 1899
COMPLETE SPECIFICATION.
Improvements in Pneumatic Tyres.
I, JAMES HILORY DRISCOLL, Clergyman, of Rouses Point, New York, 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:-
The invention relates to improvements in pneumatic tires; and the object is
to improve the construction and increase the resiliency and durability of the
compound tire, so as to particularly adapt it for use on trotting sulkies and
heavy vehicles.
To this end, the invention consists in forming the inner tube into two counter-
part sections. It further consists in the manner of protecting the abutting ends
of said sections. It also consists in the construction, combination and arrange-
ment of the several parts of the device as will be hereinafter more fully described
and particularly pointed out in the appended' claim.
The accompanying drawings show my invention in the best form now known
to me, but many changes in the details might be made, within the skill of a good
mechanic, without departing from the principle, or sacrificing any of the advan-
tages of the invention, as set forth in the claim at the end of this specification.
The same reference characters indicate the same parts of the invention.
In the drawings:
Figure 1 is a longitudinal section of my improved inner tube as it appears
encased within the outer tube.
Figure 2 is a plan view of one of the inner tube sections.
Figure 3 is a detail view of the guard plates.
Figure 4 is a detail view of part of the outer tube.
1 denotes the outer tube, and it is formed with the flaps 2-2 which are
located at the side of the nipple holes and contiguous to the rim 4. Each flap 2
is formed with an orifice 5, and the contiguous ends of the solid portion of the
outer tube are also formed with corresponding orifices 6 and 7.
8 denotes a curved or crescent-shaped plate, which is provided on its outer
face with a stud bolt 9 and nut 10, and 12 denotes a counterpart plate, which is
provided with an orifice 13 to receive the bolt 9, and on its inner face with two
short studs or tits 14-14, which correspond to the orifices 6 and 7 in the tube 1.
15-15 denote the independent inner tubes, and as one is a facsimile of the
other, the description of one will answer for both.
Each tube 15 forms a half-circle, closed at its outer ends, and provided about
midway with the usual valved nipple 16. 17-17 denote envelopes or caps pre-
ferably formed of linen or-some similar suitable fabric, and having their inner
ends connected by a tape 18.
The manner of assembling the parts is as follows:
The inner tubes 15 are first deflated, and the caps or envelopes slipped over
the outer ends of the tubes, as shown in Fig. 2. One end of the tube is then in-
serted at the flap in the outer tube, and forced around until the nipple is in line
with the nipple-orifice in the rim. The other end is then inserted in like manner,

page_text: and the nipple pressed inwardly and brought out through the rim. The other
tube 16 is then inserted at the other flap in like manner. The plate 8 is then in-
serted between the outer and inner tubes, so that the orifice in the flap will close
down over the studbolt 9, and the plate 12 is then placed over the flap opening,
so the studs 14-14 will extend into the orifices 6 and 7 in the outer tube, and
the orifice 13 encompass the stud bolt on the plate 8. The nut 10 is now screwed
down on the stud bolt 9, and the two plates brought together to effectively close
the flap opening. The tire is now ready for inflation.
Having now particularly described and ascertained the nature of my said in-
vention, and in what manner the same is to be performed, I declare that what I
claim is :-
In combination, the inner segmental tubes 15, the outer tube 1 formed with
the orifices 6 and 7 and integral flap 2 provided with the orifice 5, the crescent
shaped plate 8 formed with a threaded stud bolt 9 and adapted to be inserted
within said outer tube 1 and allow said bolt to project outwardly through the
orifice in the flap, and the counterpart plate 12 formed with the orifice 13 to
receive said bolt, and with the short studs 14-14 to engage the orifices 6 and 7
in the outer tube, and the nut 10 secured on said stud bolt, substantially as shown
and described.
Dated this 10th day of January 1899.
WHEATLEY & MACKENZIE,
40, Chancery Lane, London, W.C., Agents.