US1454995A - denmire - Google Patents

Description

H. A. DENMIRE COLLAPSIBLE TIRE CORE May 15, 1923.

Filed April 23, 1920 2 Sheets-Sheet 1 My 120M 1920 2 Sheets-Sheet 2 H. A DENMIRE COLLAPSIBLE TIRE GORE Filed April 23.

May 15, 1923.

PEIUGIZ Wi ma I 4/ Patented May 15, 1923.

UNITED STATES PATENT OFFICE.

HAROLD A. DENMIRE, OF AKRON, OHIO, ASSIGNOR OF ONE-HALF TO THE GENERAL TIRE & RUBBER COMPANY, OF AKRON, OHIO, A CORPORATION OF OHIO.

GOLLAPSIBLE TIRE CORE.

Application filed April 23, 1920. Serial No. 375,989.

To all whom it may concern:

Be it known that I, HAROLD A. DENMIRE, a citizen of the United States, residing at Akron, in the county of Summit and State of Ohio, have invented a certain new and useful Improvement in Collapsible Tire Cores, of which the following is a full, clear, and exact description.

This invention is an improvement upon the collapsible core which is disclosed in my application Serial No. 277 ,476, filed Feb. 17, 1919; and relates to the construction of the core sections, and also to the mechanism for moving said core sections from their expanded or operative positions to the collapsed positions, and vice versa.

In the drawing, Fig. 1 is an end view of the core and associated mechanism when the core sections are expanded to form an annularcore; Fig. 2 is a sectional end view in the plane of line 22 on Fig. 1 when the core sections are collapsed; Fig. 3 is a sectional end elevation of the core sections 20 and the mechanism for collapsing them showing said parts in the position they occupy when the core sections are collapsed; Fig. 4c is a side view partly in section of the mechanism when the core sections are collapsed; Fig. 5 is asectional side elevation of the mechanism showing the parts in the position they occupy when the core sections are expanded; and ig. 6 is a sectional end. view inthe plane of line 66 showing the position of the parts when the core sections are expanded. Fig. 7 is a sectional view in plane of line 7-7 on Fig. 5.

The mechanism includes a shaft 10 on which are two sleeves 25, 35, the former having a sliding tongue and groove connection with the shaft and the latter being immovably fixed to the shaft. Each sleeve supports a pair of diametrically opposed arc-shaped core sections, and the means for operating the same. Fixed to the proximate ends of each of said sleeves 25, 35, are two diametrically op osed guide bars 26, of which the guide bars fixed to sleeve 35 extend in directions at right angles to the guide bars fixed to the sleeve 25. On each of these guide bars a bracket 21 is slidably mounted. The outer ends of these brackets are offset away from the guide bars on which they are mounted and toward the other guide bars; and each bracket is secrank which takes the form of a hand wheel 27 which is provided with two crank studs 28. A link 22 is pivotally connected to each stud and to one of the core-carrying brackets 21. When either hand wheel is turned the associated pair of core sections will be moved radially toward or away from each other, according to directions by which the hand wheel is turned, said core sections being guided in their movements by the guide bars.

When the core is inthe expanded or 0perative position, the four core sections are circumferentially aligned, and their proximate ends are in contact. The outer surfaces of the engaging ends of the core sections are so shaped and disposed that when the core sections are in circumferential alignment to form the annular core, the two core sections 20 may be moved upon their guide bars 26 toward the axis of the shaft without any interference from the core sections 20 Preferably the ends of the core sections are so shaped, substantially as shown, that the planes in which they meet are parallel with each other and with the radial plane in which points on the core sections 20 move as they pass from the expanded to the collapsed positions, and vice versa.

To collapse the core, that is to say, to move the parts from the expanded positions shown in Figs. 1 and 5, to the collapsed positions shown in Figs. 2 and 4, the operator takes hold of that hand wheel 27 which is, mounted on the movable collar 25 and turns it. the result being that the two core sections 20 will be caused to move along the guide bars 26 toward the axis of the shaft. When these core sections 20 have been moved entirely from between the core sections 20*, the operator, still having hold of the same hand wheel 27, will pull it and the collar 25 toward the stop flange 12 on the end of the shaft 10. Thereby the collapsed core sections 20 will be drawn to one sideof the core sections 20 so that the Ill travel.

last named sections may now be moved inward toward the shaft. To effect this resalt the operator takes hold of the other hand wheel 27 and turns it with the result of causing the core sections 20 to move along the guide bars 26 toward the axis of the shaft, and until they assume the positions shown in Fig. 2.

The movement of the core sections to the collapsed positions withdraws them completely from the tire casing which has been formed upon the expanded core; and said casing may then be removed from the machine. 111 Fig. 2' the position of the tire casing relative to the parts of the mechanism which have been described is indicated by dotted lines. When the tire casing has been removed the core may be restored to its operative condition, as shown in Fig.1, by moving the described movable parts in the reverse direction and in the reverse order.

Upon the ends of the core sections 20 are projecting tongues 20 which are parallel with the path in which the core sections On the ends of the other sections 2O are grooves 20 into which the tongues 2O will pass asfthe core sections. 20 are being moved out to their expandedv position. The outer ends of these tongues will come into engagement with the ends of the grooves 20, and thereby the outward movement of the cores 20 will be stopped when said cores have come into circumferential alignment with the cores. 20.

Fig. 5 shows in dotted lines a partly finished tire casing upon the expanded core. It is necessary to apply beads to the outer surfaces of said tire casing near its inner edges. In order to insure the accurate application of these beads, to the tire casing, guide ringsdO may be conveniently used with the construction shown. Each guide ring is of the. required diameter, and it is secured to a plurality of offset legs 41, at the inner ends of which are feet 42 that lit the cylindrical periphery of the associated hand wheel. Only one guide rin is shown, but it i sto be understood that a guide ring similar to that shown is to be applied to the other handwheel, to aid in the application of thebead to the corresponding side of the tire casing. The inclination of the legs 41 as shownoffsets the guide ring to one side of they supporting hand wheel so that the guide ring may lie very close to the tire casing.

It is to be noted that each hand wheel is formed. with a cylindrical flange 27 whose outer surface is a lateral continuation of the cylindrical, surface of the hand wheel itself. This gives abroad surface for the feet 42 0f the head guide rings to en age with, and it also; permits the provision of the internal bead. 2,7, tothisfiange to give convenient hand hold for the operative.

Each of the core sections is a hollow sheet metal structure with plugs 44: in its ends. The core proper is made of two pressed. metal side members 45, whose edges along the periphery of the core section are in substantial. contact, and these halves are riveted or otherwise secured to the inserted end plugs 4A. The brackets 21 pass between the inner edges of the pressed metal core members 45, midway between their ends, and are secured to both by rivets or other suitable means.

Having described my invention, l claim 1. in a collapsible core, the combination of a shaft, a collar thereon having two diametrically opposed radial guide bars, two core sections, bracket-s fixed to said core sections andslidabl-y supported on said guide bars respectively, a wheel which is rotatably mounted on said sleeve and has two crank pins, and links which respectively connect said crank pins and core section, brackets.

2. In a collapsible core, the combination of a shaft, a sleeve mounted on said shaft and having a tonguevand groove sliding connection therewith, two diametrically opposed radial guide loars fixed to said sleeve,

two core sections, brackets fixed to said. core sections and slidably supported on said guide bars, a wheel which is rotatably mounted in an annular groove. upon said sleeve and has two crank pins, and. links which respectively connect said crank pins and core section brackets.

3. In a collapsible core, the combination of a shaft, two sleeves,one fixed to and one movable longitudinally only on said shaft, each sleeve having a pair of oppositely extended radial guide bars ofwhich the guide bars. fixed to one sleeve are at right angles to the guide bars fixed to the other sleeve, a core section slidably supported on each guide bar, a hand wheel rotatably mounted on each collar and provided with two crank pins, and links pivotally connected respectively to said crank pins and to the associated core sections.

4. In a collapsible core, the combination of a pair of," diametrically opposed areshaped core sectionswhich are movable in radial directions toward and away from each other, a second pair of similar core sections which are similarly movable but in paths at right angles to thepathsin which the first named cores move, said core sections being adapted to be circumferentially aligned with their ends. in cont-actto form an annular core, the; engaging ends of said core sections lying in, two planes which, are parallel with each other and with; the path in whichone pair of core secti0ns:move,,said engaging ends of' the core sections. being formed respectively with rooves: and tongues which slidably fit t erei-n,-eaich groovehaving an end with-which. an end of the corresponding tongue engages when the core sections come into circumferential alignment.

5. In a collapsible tire core, the combination of two pairs of radially movable core sections, mechanisms including a rotatable hand wheel for moving each pair of core sections radially, and a bead guide ring removably mounted on ahand wheel.

6. In a collapsible tire core, the combination with a shaft, two pairs of core sections, each pair being radially movable in paths at right angles to the paths in which the other two cores sections move, mechanisms for moving said two pairs of tire sections toward and away from the axis of the shaft, each core section comprising a sheet metal shell and solid end plugs secured in the ends thereof.

7 In a collapsible core, two pairs of radially movable core sections adapted when circumferentially aligned to form an annular core each section comprising two sheet metal halves, and end plugs which are fitted in and secured to the ends of said sheet metal halves, certain of said end plugs being provided with tongues and the other of said plugs being provided with grooves the said tongues and grooves engaging to preserve alignment when the core sections are circumferentially aligned.

In testimony whereof, I hereunto afiix my signature.

, HAROLD A. DENMIRE.

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