US1303256A - of cleveland - Google Patents

Description

D. A. CLARK AND c. E. LOWE.

TIRE CORE. APPLICATIbN FILED AUG-I IQIB.

Patented May 13, 1919,.

irsirs s'rA'rEs PATENT orrron.

310. 11 A. CLARKAND CLYDE E. LOWE, OF CLEVELAND, OHIO, ASSIGNORS TO THE CLYDE E. LGWE GOMPANY, F CLEVELAND, OHIO, CORPORATION OF OHIO.

TIRE-CORE.

Specification of Letters Patent. Patented HIay 13, 1919.

Application filed August 7, 1918. s erial No. 248,677.

To all whom it may concern:

7 Be it known that we, Don A. CLARK and CLYDE lfi. Lows, citizens of the United States,

residing; at Cleveland, in the county of Cuya-.

huge. and State of @hio, have invented a certain new and useful Improvement in Tireof which the following is a full, clear, cract description, reference being had to the accompanying drawings. to This invention relates to cores for use in the manufacture of pneumatic tires and has especial reference to sheet metal cores of the general type described in and claimed in our Patent No. 1,273,032 granted July 16, is 1918, and consisting essentially of a plurality of arcuate, hollow, sheet metal sections secured around the periphery of a rigid metal ring. res objects of the present invention are the provision" of new and simplified as means for securing the sheet metal bodies to said ring; for preventin the ingress of steam, water, or other obJectionable fluids the interiorof the core; for securing tothe varioussections of the core in 9 me be of the collapsible type; for and strengthening the core; while objects and advantages of our inziil become apparent as the descripi n the drawings accompanying and forma part of this application we have shown W of the many mechanical construction hich our inventive idea can be embodied,

not intended. to limit us to the constructions therein set forth. In this drawing, l igure 1 is a plan View of part of a collapsible tire core constructed in accordance with our invention; Fig. 2 is a cross sectional View of the core shown in Fig. 1'; Fig. 3 is a cross sectional view of a modified form of attachin t shown in connection with the base ring of an integral core; Figs. e, 5, and 6 illustrate modified, modes of attaching the sheet 4& metal walls in connection with a different type of mounting sometimes employed with *tional cores: and Fig. is a plan view of of the core shown in Fig. 6. L 1e essence of the present, invention consists in. this, that the sheet metal bodies are -l-' med at their inner parts withspaced integral flanges between which 1s inserted a flat sided supporting ring, said flanges 'being clam ed thereto by fastening members arranged perpendicular to the planeof said "11 this drawing is illustrative only andsaid bodies is formed at the portion of smallest diameter with a pair of spaced inwardly projecting flanges 22,which are. preferably substantially parallel. These bodies are of arcuate shape and are assembled together end to end forming a complete ucircle, the various sections being preferably not less than in extent nor greater than 180. The ends of these sections are joined together in any suitable manner as by bracing sleeves (shown in dotted lines in Fig.

1) and their joints are shown at 33 in Fig. -1.

Inthe construction shown in Figs. 1 and 30 2, these sections are assembled around a rigid supporting ring 4, said ring having a fiat-sided peripheral portion 5 introduced be tween the flanges 2-2, and having at each side an inclined face 6 bounding said flatsided portion. The portion 5 is formed at spaced intervals with transverse threaded apertures 7, 7 in which are received the fiatheaded screws 88, countersunk into the flanges 2-2 and serving to grip the parts together. The margins" of the flanges 22 are formed with laterally turned lips 99 which lie against the face 6-6. The ring is also shown as formed with grooves 10-10 receiving packing material by means of which the ingress of fluid is prevented.

The core body 1 and ring 4: are severed at certain points by transverse sc arfs 12-12 arranged ,at oblique angles to the radius so as to permit certain sections of the core to be removed and the remainder of the same to be collapsed; and in order to secure said sec tions rigidly togetherwe have shown a pair of rigid rings 13-13, each having upon one 1 side an annular groove 14, oneface of which,

side of the ring l. The rings 13-13 being drawn toward each other by any suitable in Fig. 4, the ring 4* means such as bolts or clamps (not shown) it will be clear that the core sections will be held rigidly together; and in the present instance we have shown the wall 15 as overlying the lips 9-9 of the sheet metal body whereby the same are held in place with added firmness. The inner periphery of the ring 4 is shown as formed with a groove or recess 18 adapted for the reception of the clutch or mandrel on which the core is mounted for operation.

In the modified construction shown in Fig. 3, the ring 4 is made in a single piece, thus producing an integral or non-collapsible core such as is frequently used for smallsized tires 01' soft-bead tires. This ring, like the preceding is formed with a peripheral rectangular portion 5 introduced between the flanges 2-2, and with a wall 6 at the base of such flat-sided part. Each side wall of the body 1 is formed at a point outside the flange 2 with an inward offset 20, while the inner margin of each flange 2 is formed with a laterally turned lip 9 adapted to engage the Wall 6*. Between each lip 9" and the corresponding offset 20 there is interposed a sheet metal ring 21, .whose inner part is flat to engage the corresponding flange 2, and whose outer part is flared to correspond with the slope of the core wall. The thickness of this ring is the same as that of the oflset 20, thereby forming a smoothsidedcore. This ring and the flange therebeneath is traversed by a pluralityof spaced apertures receiving suitable fastening means such as the transverse rivets 22 whereby the parts are held together. The advantage of this construction is that the ring 21 distributes the pressure of the rivets, and also forms a support or anvil for the operation of the cutting knife which is ordinarily applied in the angle between the flange and core-wall. The sides of the portion 5 are shown as grooved at l010 for the reception of the packing material.

Referring now to the construction shown and is formed at its innen part with a laterally facing annular groove, 25, receiving the annular rib 26, of a continuous base ring 27 by means of which the segments are secured together. The ring 27 is formed with a flange portion 28 overlying the interior of the ring 4* and formed with a groove or recess 18 for, the reception of the clutch or mandrel. The rib 26 is provided with spaced lateral bolts 29 adapted to enter suitable apertures in the base of the groove 26 and to be held therein by nuts 30.

The peripheral, portion of the ring 4 is formed with a flat-sided part I defined by the walls or shoulders 6 In the present instance these walls or shoulders lie inside of the plane of the ring sides, forming grooves, Whereas in the former embodiments they lay is of the segmental type.

outside, forming ribs; and the n'largins of the flanges 2 2 being laterally turned to form lips engaging lhcsc shoulders are in the present instance turned inwardly as at 9 where previously they were turned outwardly. Suitable securing devices 8" traverse the ring portions 5" and engage the flanges 22, these devices in the present embodiment being represented by a rivet having flattened heads engaging countersunk recesses in the flanges 2, 2.

. In the embodiment shown in ,Fig. 5 the ring and its adjunctsare the same as in Fig. 4 excepting that the side walls of the portions, 5, instead of being entirely smooth, are countersunk at intervals as shown at 32, and the flanges 22 are embossed inwardly to lit these countersunk portions. This cmhossing forms upon the exterior of each flange the equivalent of a countersunk hole for receiving the hcads 33 of the ,l'astcnings, here shown as screws threaded into the ring. The advantage of this over that shown in Fig. 4: is that it provides a larger surface of contact between the iastcnings and flanges.

In the cmbodimcnt shown in Fig. (3 the ring and its adjuncts are the same as those shown in Figs. l and 5 except that the sidcs of the portions 5 are formed with annular grooves 35 and the flanges 2-2 arc embossed inwardly to form annular cmlmsscd ribs I'll; complementary to these rooves.

In the outer side of the channels dclincd by this ei'nbossing are located the washers :ET traversed by the fastcncrs 38 which may be either rivets or screws.

In the embodiments shown in Figs. -l, 5, and 6 the walls of the rings t and 27 are preferably made flush with the exterior surfaces of the flanges 2-2; and the grooves receiving the lips 9 are preferably sweated full of a fusible metal such as soft solder in order to inhibit the entrance of fluids. It will he understood that in the practical use of the devices, either in the wrapping of the fabrics thereon or in the curing process in the mold, the operating pressure is inward, thus bringing a minimum of strain upon the fastenings and tending to force the flanges into tighter contact with the ring (whether or not additional mcking be employed) thus again tending to inhibit leakage. It will he understood that numerous changes in construction could be made without departing from our inventive idea, and all such variations we desire to protect and secure in these Letters Patent.

Having thus described our we claim is 1. A tire core comprising, in combination, a plurality of hollow arcuate sheet metal bodies arranged around a rigid metal ring.

invention, what each body having a pair of inwardly projecting spaced flanges and said ring having a peripheral portion projecting between said flanges, and means including laterally extending holding devices for clamping said flanges laterally against said ring. a

2. In a tire core, a hollow arcuate sheet metal body having a pair of inwardly projecting spaced flanges, a ring having a portion located between said flanges, and means including headed fasteners for clamping said flanges against said ring, said fasteners being arranged with their length transverse to the plane of said ring. i

3. In a tire core, a hollow arcuate sheet metal body having a pair of inwardly projecting spaced flanges, a ring having aportion located between said flanges, and headed securing devices traversing said flanges and ailixed to said ring, the heads of said devices overlying said flanges.

4. In a tire core, a hollow arcuate sheet metal body having a pair of inwardly pro jecting spaced flanges, a ring having a portion located between said flanges, means for securing said flanges to said ring, and means preventing ingress of fluid between said flanges and ring,

5. In a tire core, a hollow arcuate sheet" metal body having a pair of inwardly projeeting spaced flanges, a ring having a portion located between said flanges, thesides of said ring being grooved, sealing material 111 sald grooves, and means clampingsaid flanges against said ring.

6. In a tire core, a hollow arcuatesheet metal body having a pair of inwardly pro- Jectmg spaced flanges, a ring having a perlpheral portion located between said flanges and having at each side a shoulder adjacent to'said peripheral portion, said flanges haw ing laterally turned lips adapted to rest v against said shoulders, and means for. clamping the corresponding lip, said ring'being grooved for the reception of sealing material, and means ior clamping said flanges to said ring.

8. In a tire core, a hollow arcuate sheet metal body having a pair of inwardly spaced flanges-whose margins are formed with outwardly turned lips, a ring having a peripheral portion located between said flanges and a shoulder at each side engaging the corre sponding lip, a clamping ring at each side of said first ring engaging the face of the corresponding lip opposite to its shoulder, and means for drawing said last rings together. f p

In testimony whereof, we hereunto aflia our signatures.

now a. omen, earns a. LUWE.

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