Tread for Pneumatic Tires. Page: 3 of 3
[1], 2 p. : ill. ; 23 cm.View a full description of this patent.
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1,317,185
the ends and the marginal bead, 8, is re-
curved in such manner- as to form a chan-
nel therein through which I contemplate
passing a cable, 13, or other reinforcing
5 means for the purpose of more securely hold;
ing the parts of the covering attached to the
tire. Under ordinary circumstances the re-
siliency of the covering will itself serve to
clamp the same to the tire, but the reinforc-
10 ing cable, 13, will serve to more firmly re-
tain the same in position. It is obvious that
this cable, 13, may have a snap or catch by
means of which the same may be held de-
tachably in position; or a turn-buckle, not
15 shown, may be used to adjust the tension
thereon, as desired. In this modification,
I contemplate using the outer- pad or tire,
10, of the same endless form as shown in
Fig. 1, but I do not wish to confine myself
20 to this form entirely, as in-some cases it may
be advantageous to form this part also in.
sections.
In Figs. 2 and 3, I have contemplated-
forming the clenching flanges, 9, by bend-
25 ing the covering itself outwardly and then
back upon itself, but it is obvious that if the
covering. is made of material not properly
adapted therefor that this construction will
result in a spreading of the material of the
30 flanges and will therefore be objectionable.
If material of this character is used, it is
preferred that the clenching flanges be made
of more rigid material. In Fig. 5, I have
shown the flanges, 9" as being formed upon
35 a separate detachable plate, 14, arranging
to be attached to the covering 7" by means
of rivets, 15, or other similar means.
It is apparent in this modification that if
the clenching means becomes injured or un-
40 serviceable the plate 14 with the flanges
thereto attached may be detached from the
covering, and a new plate,- 14, substituted
therefor.
In the operation of my invention, the pro-
45 tective covering is placed upon the tire cas-
ing .when the same is deflated and it is ap-
parent that- in this condition of' the tire the
same may be compressed to such an extent
that the covering' may be sprung around' the
50 same and' fitted in proper position. When
'this has been done, the tire may be again
inflated and the resiliency of the covering
will serve to hold the said covering firmly
in position.
55 When the covering is made in sections as
is illustrated in Fig. 4, the cables 13 may be
removed by' detaching the same, and the
'parts may be placed upon the tire without
deflating the same and may be secured in
60 position by again snapping the ends of thecables, 13, in adjusted position. The sec-
tions making up the covering are held to-
gether by the flexible tread portion 10 and
when the cable is removed the sections may
be easily turned laterally so as to be easily 65
slipped over the tire casing. It will be obvi-
ous that there will be a slight resistance in
the continuous tread portion and that when
the said sections are turned so as to include
the casing, very little force will be necessary 70
to adjust the coverings upon the casing of
the tire. The snapping of the cables in posi-
tion after the covering is thus adjusted will
firmly secure 'the. same in. place.
In the use of this covering the tire will 75
be protected against puncture from glass or
nails or other sharp substances in the road-
way and the outer cushion or tire, 10, 'will
serve to take up any shock due to ordinary
pebbles or other irregularity in the road 80
bed. Any other shock of later proportions
will be taken up in the usual way by the re-
siliency of the pneumatic tire itself. I have
thus provided a protective covering for pneu-
matic tires which will greatly increase and 85
prolong the life of the said tire.
The wear upon the tread portion of the
tire will be taken up almost entirely by the
outer pad or tire 10. Said outer tire may
be easily detached and replaced when worn. 90
It will be readily seen that a set-of ordinary
tires will last several times as long with this
covering as they would without the same.
Having thus described my invention, what
I claim as new, and desire to protect by Let- - 9 5
ters Patent is:
'1. In a device of the character. described,
the combination of a pneumatic tire, a casing
thereon, a protecting armor and tread there-
for comprising a metallic covering approxi-. 100
mately semicircular in 'cross-section and
made up of a plurality of sections, beaded
on the outer margins, an adjustable fasten-
ing means adapted -to be passed through the
said beads and an -endless outer central rub- 105
ber tread on said'armor, secured in place by
clamping flanges thereon, said' fastening
means and said tread acting to secure saia
armor on said casing.
2. In a device of the character described, 110
a pneumatic 'tire, a protecting armor there-
for comprising a resilient metallic covering
composed of a plurality of sections, 'and a
central solid rubber tread extending continu-
ously around said armor, said armor being 115
retained on said tire by 'said central tread
and by an adjustable connecting means.
In testimony whereof, I hereunto affix my
signature this the 22nd day of August, 1918.
ROYAL W. TWOMBLY.Copies of this patent may be obtained for five cents each, by addressing the "Commissioner of, Patents,
Washington, D. C."2
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Twombly, Royal W. Tread for Pneumatic Tires., patent, September 30, 1919; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth1258478/m1/3/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.