Improvements in Pneumatic Tires.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in Pneumatic Tires.
We, CHARLES ANDREW PETTIE, of 428, Third Street, Brooklyn, in the County
of Kings, Gentleman, and FREDERICK WILLIAM BARKER, of 253, Broadway, New
York, in the County of New York, Patent Agent, both in the State of New York,
U.S.A., do hereby declare the nature of this invention to be as follows:-
This invention pertains to that class of pneumatic tires for vehicles having
means for preventing puncturing and the object of the present improvements is
to provide
an articulated band of wood or other light material around the tread
of the tire of such suitable construction and arrangement as to render it practically
invulnerable against penetration by sharp pointed stones, broken glass, tacks, etc.
The ordinary tire provided with the various devices for minimizing the danger
of puncturing which are now in use, and which tires commonly retain their
ability to yield at the point where they meet an obstruction or projection in the
road, naturally become indented at that point, and thus the projection, if it be
sharp pointed, secures a fixed place of attack, so that when the full weight of the
rider and the vehicle comes directly over said projection, the penetrating and
cutting power of said projection is developed to the full extent of such weight.
Recognizing this fact we have furnished our improved tire with an articulated
tread portion whose members are individually of an unyielding character, but
which are capable of assuming different relative angles in consonance with the
uneven surface of the road being traversed, whereby there is less liability for the
tread of the tire to receive fixed impression from a pointed or sharp edged projec-
tion and it has instead a tendency to glide or glance away therefrom. Our said tread
band being composed of members (preferably of wood, wood pulp or papier mache)
placed side by side in a bed of canvas and rubber, and encircling the tire, the said
members being jointed in a manner to efficiently prevent the passage, of any
pointed or sharp edged projection between their meeting edges, whilst at the same
time permitting free movement to the entire band by reason of its articulation,
forms a perfect armor clad protection against puncturing whilst retaining all
the resiliency due to and essential with a pneumatic tire.
In the drawing accompanying this specification,
Figure 1 is a cross sectional view of my improved tire.
Figure 2 is a horizontal section of a portion of the tread thereof.
Figure 3 is a plan view of several members of the articulated band.
Figure 4 is a detail view of a portion of Figure 1 showing its natural appearance
in service, and
Figure 5 is a detail of a modified form of articulated band.
In said figures A indicates the ordinary hose pipe tire, but in the construction
of which we employ less material than is usual as with tire said tube is simply
an air receptacle and does not require to stand the friction of the road.
Rindientes our improved tread portion. which encircles the tube A. Said tread

page_text: portion is formed in the following manner and comprises the elements herein
enumerated.
We take a strip of canvas or other textile fabric C and lay thereon in a line the
pieces of wood or other material 1) which each have the concaved sides d and
bevelled ends d. Between each pair of pieces 1) we place a rounded body e
having pointed ends e¹, the said pieces D and rollers e forming a continuous band
or strip. Between the bevelled ends d¹ and pointed ends and the canvas C
(which latter is turned over against the inner surface of the band as seen), we
place a sufficient quantity of rubber f to form a flexible socket for said bevelled
and pointed ends. We next take a strip of raw rubber E which may have the
longitudinal rib g, and place it around the parts of the band previously described,
its edges preferably terminating in longitudinal lines on the upper side of the
band with a space between them, as it is not necessary that this envelope of rubber
should cover the inner surface of the band. The hose pipe A. (preferably unvul-
canized) and the band B are now placed together in the manner seen in Figure 1
and the whole put through the process of being vulcanized in a mould, the hose
pipe A being preferably previously partly inflated. The heat will expand the air and
the two parts of the tire will become inseparably united during said process,
assuming approximately the shape shown in Figure 4.
As a modification we may employ members h, Figure 5, to form an articulated
band, instead of those designated D, and said members h, by their concavo-convex
sides serve as a good form of articulated band.
The rib g provides a narrow point of contact with the road, minimizing friction,
and enabling the flat portions of the tread, upon either side thereof, to yield verti-
cally upon meeting obstructions and to expel such obstructions latterly instead of
as it were absorbing them, as in the case of a soft tread tire, and forming a fixed
point of penetration.
We are familiar with the United States Patent to Warson and Pickett,
No. 548,900, dated October 29th, 1895, which shows a tread band formed of flat
pieces of metal placed side by side in an endless line, but said patent contains no
means to prevent projections entering through the crevices between said pieces,
nor are there any means for preventing the members from riding one upon the
other, the envelope, (as our experiments have proven) not serving this purpose.
In other words, the positive articulation in a tread or shoe of this character, is an
absolutely essential element.
We wish it to be distinctly understood that we do not limit ourselves to the
employment of any particular material in the construction of the tread band B
but may employ any suitable material possessing the necessary qualities for such
purpose.
thin 15th day of T..1.. 1907
Improvements in Pneumatic Tires.
We, CHARLES ANDREW PETTIE, of 428, Third Street, Brooklyn, in the County
of Kings, Gentleman, and FREDERICK WILLIAM BARKER, of 253, Broadway, New
York, in the County of New York, Patent Agent, both in the State of New York,
U.S.A., 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 pertains to that class of pneumatic tires for vehicles having

page_text: means for preventing puncturing and the object of the present improvements is
to provide an articulated band of wood or other light material around the tread
of the tire of such suitable construction and arrangement as to render it practically
invulnerable against penetration by sharp pointed stones, broken glass, tacks, etc.
The ordinary tire provided with the various devices for minimizing the danger
of puncturing which are now in use, and which tires commonly retain their
ability to yield at the point where they meet an obstruction or projection in the
road, naturally become indented at that point, and thus the projection, if it be
sharp pointed, secures a fixed place of attack, so that when the full weight of the
rider and the vehicle comes directly over said projection, the penetrating and
cutting power of said projection is developed to the full extent of such weight.
Recognizing this fact we have furnished our improved tire with an articulated
tread portion whose members are individually of an unyielding character, but
which are capable of assuming different relative angles in consonance with the
uneven surface of the road being traversed, whereby there is less liability for the
tread of the tire to receive fixed impression from a pointed or sharp edged projec-
tion and it has instead a tendency to glide or glance away therefrom. Our said tread
band being composed of members (preferably of wood, wood pulp or papier mache)
placed side by side in a bed of canvas and rubber, and encircling the tire, the said
members being jointed in a manner to efficiently prevent the passage of any
pointed or sharp edged projection between their meeting edges, whilst at the same
time permitting free movement to the entire band by reason of its articulation;
forms a perfect armor clad protection against puncturing whilst retaining all
the resiliency due to and essential with a pneumatic tire.
In the drawing accompanying the Provisional Specification
Figure 1 is a cross sectional view of my improved tire.
Figure 2 is a vertical section of a portion of the tread thereof.
Figure 3 is a plan view of several members of the articulated band.
Figure 4 is a detail view of a portion of Figure 1 showing its natural appearance
in service, and
Figure 5 is a detail of a modified form of articulated band.
In said figures A indicates the ordinary hose pipe tire, but in the construction
of which we employ less material than is usual as with our tire said tube is simply
an air receptacle and does not require to stand the friction of the road.
B indicates our improved tread portion, which encircles the tube A. Said tread
portion is formed in the following manner and comprises the elements herein
enumerated.
We take a strip of canvas or other textile fabric C and lay thereon in a line the
pieces of wood or other material D which each have the concaved sides d and
bevelled ends d'. Between each pair of pieces D) we place a rounded body e
having pointed ends e¹ the said pieces 1) and rollers e forming a continuous band
or strip. Between the bevelled ends and pointed ends e¹ and the canvas C
(which latter is turned over against the inner surface of the band as seen) we
place a sufficient quaniity of rubber f to form a flexible socket for said bevelled
and pointed ends. We next take a strip of raw rubber E which may have the
longitudinal rib g, and place it around the parts of the band previously described,
its edges preferably terminating in longitudinal lines on the upper sides of the
band with a space between them, as it is not necessary that this envelope of rubber
should cover the inner surface of the band. The hose pipe A (preferably unvul-
canized) and the band B are now placed together in the manner seen in Figure 1
and the whole put through the process of being vulcanized in a mould, the hose
pipe A being preferably previously partly inflated. The heat will expand the air and
the two parts of the tire will become inseparably united during said process,
assuming approximately the shape shown in Figure 4.
As a modification we may employ members h Figure 5 to form an articulated
band, instead of those designated D, and said members h, by their concavo-convex
sides serve as a good form of articulated band,

page_text: The rib g provides a narrow point of contact with the road, minimizing friction,
and enabling the flat portions of the tread, upon either side thereof, to yield verti-
cally upon meeting obstructions and to expel such obstructions laterally instead of
as it were absorbing them, as in the case of a soft tread tire, and forming a fixed
point of penetration.
We are familiar with the British Patent to Warson and Pickett,
No. 20,407, dated October 29th, 1895, which shows a tread band formed of flat
pieces of metal placed side by side in an endless line, but said patent contains no
means to prevent projections entering through the crevices between said pieces,
nor are there any means for preventing the members from riding one upon the
other, the envelope, (as our experiments have proven) not serving this purpose.
In other words, the positive articulation in a tread or shoe of this character, is an
absolutely essential element.
We wish it to be distinctly understood that we do not limit ourselves to the
employment of any particular material in the construction of the tread band B
but may employ any suitable material possessing the necessary qualities for such
purpose.
We are aware that our said invention is susceptible to various modifications in
its construction and do not wish to be limited to the exact details shown.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is:-
--
1. In a tire, a tread portion consisting of an articulated band, substantially as
set forth.
2. In a tire, a tread portion consisting of a band formed of loosely jointed pieces
of suitable material, substantially as set forth.
3. In a tire, a tread portion comprising an envelope and a series of members
therein having concaved sides, together with a series of rounded bodies which form
pivots between the concaved sides of said members, substantially as set forth.
4. In a tire, a tread portion comprising a series of members having concaved
sides and tapered ends and placed side by side to form an endless band, a series
of rounded bodies having pointed ends and arranged one between each pair of
members, a covering of textile fabric for said endless band and a bed of rubber
within said covering, to form a socket for the tapered ends of the members and for
the pointed ends of the rounded bodies; together with an outer envelope of rubber
confining the aforesaid parts, the whole being adapted to be placed around the
periphery of a pneumatic tire to form an impenetrable tread portion or shoe
therefor, substantially as set forth.
5. The combination with a pneumatic tire of a longitudinal rib projecting out-
wardly from the tread portion thereof, substantially as set forth.
6. In a pneumatic tire, in combination, a tread portion consisting of an articu-
lated band and an envelope of rubber enclosing the same, the said envelope having
an integrally formed rib encircling it longitudinally and centrally of its tread
area, substantially as set forth.
7. The combination with a pneumatic tire of a tread portion therefor consisting
of an articulated band comprising separate members, an envelope for said band,
and a longitudinal rib encircling said envelope exteriorly and projecting outwardly
therefrom, substantially as set forth.