US740578A - Pneumatic tire. - Google Patents

Description

PATBNTBD 0012 1903;

P. mantis, PNEUMATIC TIRE.

APPL IULTIOH FILED HAIL 80. 1908.

no Mann;

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Patented October 6, 1903.

PATENT OFFICE.

PHILIP MAGNUS, OF COLLINGW'OOD, VICTORIA, AUSTRALIA.

PNEUMATIC TIRE.

SPECIFICATION forming part of Letters Patent No. 740,578, dated October 6,

Application filed March 30, 1903. Serial No. 150,308. (No model.)

ments in Pneumatic Tir-es, of which the following is a specification.

The object of my Invention is to provide single or double concentric air-tube tires for vehicles which shall not only be strong and durable, but also cheap.

In order that my invention may be better understood, I will now refer to the accompanying sheet of drawings. which are to be taken as part of this specification andread herewith.

Figure 1 represents a section of a tire in which the air-tube around its tread has a tread-ring of leather. This is shown inside the cover; but it may be inside the liner. Around the outside of the liner and the treadring is situatedaleather cover. Fig. 2 represents, on an enlarged scale, a side sectional elevation of the meeting ends of a leather cover and of a tread-ring when in the fl'atstate. Fig. 3 shows a transverse section of the sides or' edges of the leather cover or tread-ring. Fig. 4. depicts anair-tube covered by a leather casing and usable for motorcarsor other heavy vehicles. A tongue is stitched inside this casing, and the two edges of the casing are drawn together by laces.

Around this casing is placed my leather cover. Fig. 5 shows an elevation of a casing around the air-tube, showing the laces, duo.

Similar letters of reference indicate similar or corresponding parts where they occur in the several views.

On reference to the drawings 'it will be seen that A represents the rim ofa cycle, motor-car, or other vehicle-wheel in which there are circumferential grooves or recesses formed by thebead or roll B and the back surface 0 of the said rim. Insidethis is one or more, concentric air-tubes D. Surrounding the airetube is a liner E. This, which is generally known as the fabric, is preferably made of cotton or other material and can either be endless or itsstwo ends overlap each other. The two .sides of the liner'near the edges can either be of single thickness or be made double .by the outer edge being turned back or folded over onto the main part. In either case the folds F of the liner are turned back upon the main portion E and inclose a retainer, preferably formed of endless wires or rings G. Instead of wires or rings or in addition to the same I may use a ring of balls or spheres. If these are used, the liner edge containing them is reinforced on the inside. Two or more rows of stitches secure the fold F to the liner E. Secured outside the liner and extending between the wire rings is the cover H. This is made of leather treated as hereinafter described, and its edges are wedge-shaped, as seen at H" in Fig. 3. This cover is wide enough for the point of the wedge-shaped portion thereon to extend beyond each ring G, and in some cases each edge may extend farther and rest inside the ring and against the back surface 0. The said cover His in one or more pieces or lengths. If it is cut out of one piece, it is specially treated, so that there is obtained an equal tension upon both edges when it is distended into a circular form.

If jointed, the meeting ends butt or meet each other, as seen in Fig. 2, and blindstitchesH are inserted from the interior of the said'cover.

In some cases I place between the liner and the cover or the liner and the air-tube an inher tread-ring K. The edges of this are wedge-shaped, and the said tread-ring may be either stitched or cemented to the cover or be stitched or cemented to the liner. Around the exterior of the cover may also be stitched or cemented or otherwise secured a leather, rubber, or other tread-ring. The edges of this are preferably wedge-shaped and may entera circumferential incision or incut made in the said cover.

In a modification of the foregoing the airtube D is surrounded by a leather casing L or a casing inside which is soft material. The edges L of this casing do not meet, but

have entered near the said edges a series of eyelet-holes M to accommodate a draw lace or'laces M. Inside this and protecting the air-tube from the laces is situated a leather tongue-ring N. One edge of this, N, is

- parts; naphtha, about two parts; isinglass,

about four drains. Three coats in all are applied. When dry, the body sides of the leather cover which has been treated to the same number of coats of the same solution are then placed around the liner and the wedgeshaped edges by hand or tools pressed downwardly upon the sides of the liner. When the whole is dried, the mold,which is reducible in diameter, is withdrawn and French chalk is applied where necessary.

I preferably use leather treated according to the process described in my companion application, Serial No. 150,309, filed herewith, as it has greater durability than any other similar material known to me.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The improved pneumatic tire consisting of a rim, a concentric air-tube, an outer casing, a tongue therein one edge of which is stitched inside the said casing, eyelet-holes around the edges of said casing, and a drawlace therein, a liner each single or reinforced edge of which is turned back upon the main portion, and incloses an endless retainer, the retainers, a cover, the edges of the said cover being wedge-sectioned and each bearing against one side of the adjacent retainer, and the back surface of the rim, as and for the purpose described.

2. A pneumatic tire comprising a rim, a concentric air-tube, an outer leather casing, and a liner having returned edges, circular retainers inclosed in the returned edges of the liner to secure it in place, a cover having meeting ends secured by blindstitches, and having its edges secured between the returned edges of the liner and the inner edges of the rim, substantially asand for the purpose described.

In witness whereof I have hereunto set my vhand to this specification in the presence of Witnesses:

CECIL W. LE PLASTRIER, GEORGE A. UREN.

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