US1052422A - Inclosed core for tires. - Google Patents

Description

Patented Feb. 4, 1913.

J. M. MILLER. INGLOSED CORE FOR TIRES. APPLICATION FILED FEB. 29, 1912 .AMES M. MILLER, OF WASHINGTON, DISTRICT OF COLUIY'JZBIiL. I

INCLOSED CORE FOR TIRES.

Application filed February 29, 1912.

To all whom it may concern Be it known that I, James M. MILLER,

a citizen of the United States, residing at \Vashington, District of Columbia, have invented certain new and useful Improvements in Inclosed Cores for Tires, of which the following is a specification.

The invention relates to an improvement in inclosed cores for tires ofthat type including a separable inner section and an outer casing, and is more particularly directed to the inner section which is constructed to-provide a full necessary resili' ency without the'necessity of inflation.

The main object of the present invention is the provision of an inner tire section adapted for cooperation with and for ready insertion in and removable from any usual type of outer casing and said inner section being of a non-inflatable type and constructed to provide open air chambers and resilient brace walls.

A further object of the invention is the provision of an inner section including a radially disposed and transverse bracewall connected by longitudinal centrally disposed struts, said :bracewalls being of gradually increasing thickness from their free ends towardtheir' centralpoint, whereby to provide the maximum thickness of material at the main point of strain.

A further object of the invention is the provision of a tire in which the space between the brace walls on opposite sides of the central strut provides air cells which when the section is in place on the outer casingforms a series of air chambers for adding to the resiliency of the tire.

A further object of the invention is the constructing of a juncture between the struts and brace walls in a manner to avoid an angular relation of adjacent surfaces, orin other words to provide suchjuncture on the full regular curve from the surface of the brace walls to the adjacent. surface of the struts, whereby to avoid the tendency to a breakage or cracking of the material under the strain, incident to the use of the tire.

A further object of the inventionis the provision of an auxiliary strip preferably a non-conductor of heat inorder to avoid the heating of the inner section incident to the friction'in use, Said strip being secured in place in a simple convenient manner to prevent wrinkling, and the securing means being further utilized as an abutment for the Specification of Letters Patent.

Patented Feb.4,1913.

erial No. 680,725.

ends of the section to prevent creeping of I the latter when in place.

The invention in the preferred details of construction will be described inthe following particularly to the accompanying. drawings in which:

Figure 1 is a broken perspective view illustrating the improved tire construction. Fig. 2 is a transverse section, through the inner casing, the non-conducting strip being shown in place, the section being taken on the line 52-42 of Fig. 3. Fig. 3 is a broken horizontal sectional view on the line- 3-3 of Fig. 2. Fig. 4 is a view inelevation partly in section of the inner section-inns trating particularly the means for securing the non-conducting strip in place and for preventing creeping of the inner section. Fig. 5 is a section on line 5-5 of Fig. 4. Fig. 6 isv a broken elevation of 'the inner section showing a slightly modified construction.

Referring particularly to the accompanying drawings, wherein like reference nu-v merals give like parts throughout the improved inner section 1 comprises a resilient non-inflatable link of suitable material, as rubber or the like, and normally of a size to specification, reference being had* fit snugly within any usual or preferred.

type or outer casing 2.

The inner section. 1 is in effect a solid.

section. formed at suitable and appropriate mtervals throughout its circumferential length and on opposite sides of a central longitudinal line with openings 3 which may be hereinafter termed the air cells. These openings are formed in the casing ofthe section or by other appropriate operation and are so disposed and 'ofsuch size as toleave betweeneach of said openings in iongitudinal alinement what maybe termed a brace wall 4, between each pa'ir of openings in transverse alinement whatmay be termed the'longitudi-nal strut Thus constructed the inner section presents a longitudinal strut 5 extendingthroughout the length of the section and a series of brace walls 4 extending from suchv struts at-right 'angles thereto and radiallyof the section when. in

tire form relation.

With reference to Fig. 3 it will be noted.

that each brace wall has its minimum width at its free or-outer end andfrom such point is gradually increased in thickness toward. the strut 5, until atits juncture with such .ness than the solid portions of said section beyond 'such point, whereby the section is materially, reinforced at its point of greatest strain. i

'Another and material point in the constru'ction of sections of this type s provided for in the present improvement in that sharp corners or angular relations of adjacent interior surfaces is avoided. This is particularly plain in Figs. 2 and 3 of the rawing's wherein it will be noted that thejunctureof each bridge wall with the 'ad- 'acent strut presents a round surface as at .while the 'unctureof the bridge walls and strut with t e upper or relatively outer rim portion 8 of the section is also rounded as at 9. Therefore in the strain incident of the compression of the section in the use of the tire there is a uniform yielding and bending of the material and the tendency to fracture, otherwise incident to sharp corners the angularly disposed adjacent surface is entirely avoided. v I

The openings 3 are preferably of oval configuration'having a length on their major axissomewhat greater than the similar dimension of the section and are preferably offset from the central line of the section so that the inner ed e of theopening is nearer the proximate e go of the section that is the outer wall of the opening to the outer edge of thesection. This provides a thick outer rim or treadportion 8 of the section and'a comparatively thin inner or felly portion'10. l

In order to avoid theheating of the section and the friction of the outer casing in use I- prefer to provlde a non-conducting strip 11, preferably of silk cut bias to enable it to con orm to the section. This strip .is practically coextensive with the outer surface of the rim or tread portion 8 of the 'S6Ctl0!1, and is designed to snugly fit between said surface and the inner surface of 'the casing 2.

strip and is to be inserted in the tire by anendwise movement, and under these condi tions means .must be provided for clamping the non-conducting strip in place and for preventing endwise movement of the section 1n the outer casing, Such means is illustrated more particularly in Figs. 4 and 5 and comprises a threaded bolt 12 designed to be passed through the felly 13 and rim 141 of the wheel this boltfor the greater portion of its'length being split to provide sections 15 and 16. At'the inner end the terminals of thesecti'ons-lti and 16 are formed to provide creeping plates 17 preferably offan shape and formed in any appropriate way 'to securely grip the non-conducting material. For example, the terminals of the sections may be inwardly turned and formed to provide spurs, andfithe proximate surface of such plates may be. roughened or otherwise formed. In the use of this securing means the ends of the non-conducting strip 11, after such strip and section have been placed in the tire in the outer casing, are

brought down between the ends of the section and passed between the creeping plates 17. After the outer casing is secured in place in the ring 14, the bolt having been passed in the usual opening in the rim a nut 18 is tightened on the bolt to draw the non-conducting' strip snugly and smoothly in place, as will be apparent from Fi 4.

When in place, as shown in Fig. 4 it wi 1 be notedthat the wing plates serve as an abutment and prevent endwisc movement of the inner section in the casing.

If desired the clamping nut' 19 may be arranged on the bolt 12 between the abutting ends of the inner section to morev effectively insure a clamping cooperation of the wings on the non-conducting strip, in

which construction it will be understood 'that the nut 19 is tightened to clamp the parts prior to the insertion of the bolt 12 through the opening in the Ielly.

In Fig. 6 Thave illustrated a slightly modified form designed to provide for convenient assembling of the section in tire forming relation where an extremely long straight length is used. In order to adapt such straight length for convenient and regular bending into circular form I cut the inner rim portion 10 of the section on radial lines as at 20 cutting from the tire inverted -V shaped portions to permit the convenient bending of the length into .circnlar'form without undue strain or compression on any part;

Tn all the forms of the tire section shown it is to be noted that I provide a non-inflatable inner tube that is arranged on the inside of any usual or preferred type of outer casing. one that does not in any way require inflation or other attention to pro vide the desired resiliency and one which by reason of such advantage is certainly free of liability of punctures, blowout-s, or similar troubles which are incident to the usual, inflatable inner tube, and as there is. no internal pressure on the outer tire casing,

due to inflation, ausing blowouts, the durability of the outer tire casing is prolonged untilactually worn down by traction alone. F urtherinore the formation of the brace walls gives the maximum strength and the size desired; the rounded contours of meeting points of surfaces subjected to strain prevents breakage or rupture; and the use of the non-conducting strip materially m-' creases the life of the section by preventing heat thereof. a

Having thus described my invention, what I claim is 1. A detachable and non-inflatable inner tire section comprising a length of material ,formed with central longitudinal web and with openings extending from the sides to but not through said web,a portion of the material of the section being cut away in line with the major axis of each opening and extending from the upper end of the opening'to and through the bottom edge of the section to permit the bending of the section into circular form while preserving the noilgmal'contour of the openings and central we 2. An inner tire section comprising an approximately solid length of resilient material formed to provide a series of aircells therein, the material between said cells providing transverse bridge walls and lontudinal -webs, each of said bridge walls aving a comparatively narrow mar al edge at each side of the section and being of gradually increasing width from each of said edges toward the longitudinal center of the section, the webs being of comparatively narrow Width and connecting the bridge walls at the, points of maximum width of the latter.

8. An inner tire section .comprising an approximately solid length of resilient material formed to provide a series of air-cells opening through each side of the section and non-communicating, the'cells being divided by transverse brldge Walls and connecting webs, said bridge walls being of maximum width on-the' longitudinal central line of the tire and sharply decreasing therefromito the free edges of said walls, the webs having a width corresponding to the minimum width of the bridge Walls, the adjacent surfaces of the webs and bridge walls merging into each other on curved lines.

In testimony whereof, I aiiix my signature in presence of two witnesses.

D. W. GOULD, Bnnnn'rr S. Jones.

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