USRE16498E - By the good ye ab tike - Google Patents

Description

Dec. 7 1926. 'Re, 16,498 w. a. HARSEL ET A}.

TIREMAKING mcnmg Original Filed :5. 1917 12 Sheets-Sheet 1 wv ntow I Edward /1 a//, fleceas g M Matron I a w f M 8 2 ad 9 4, w t fi d r e 6 vMW m 6 1... "m 4M4. mic m a [x45 m M1 5 M w. B. HARSEL ET'AL TIRE mums momma Original Filed 5. 1911 s 5 Rm m a W 4 .t O m N 7 e v m d R m m EMM fi w V 0 6 w I S A e t 9 R 8 d4 W e 6 2 MW i l w m Dec. 7 1926.

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I a W. B. HARSEL ET AL T IRE MAKING MACHINE Original Filed 5. 1917 12 Sheets-Sheet 4 Dec. 7 1926. R 16,498 w. B. HARSEL ET AL TIRE MAKING MACHINE Original Filed s. 1917 12 Sheets-Shet 5 8 141mm to :41

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W. B. HARSEL ET Al.

TIRE MAKING MACHINE.

Original Filed 5. 1917 12 Sheets-Sheet 12 l N VE NTO R 5 Edward A a/l, fleceosed,

9/ 579? A/I'ce lib/l. Erect/mi;

Reissuecl Dec. 7, 192,6.

umrco STATES PATENT OFF CE,

' WILLIAM B. nansnn'or 'Axnou, AND EDwAnb 'NALL, nncnasnn, Lawn or AKRON,

' 0111c; BY rnr: GOODYEAR TIR -E & RUBBER company. assmnmt.

TIRE-MAKING MACHINE;

Original No, 1,385,182, dateil'octoher 25,11 921, Serial noi'eoaiss, filed November aieir; and part or i original Roi 1,8 95,05 5 dated October 25,1921, original application filed November 3,

1917, Serial No.

200,185. Divided 'and application filed September 25;"1918, Serial (no. 255,651. Application 101- 'reissue filed October 24, l 923; SeriaPNoJ 670,620.

This invention relates to machines for producing vehicle tires andhas particular reference tomachinesfor making the socalled carcass from which-the outer casing, the tire, is formed. This carcass comprises a lurality oflayers or 'plies of tirefabric, 5 perposed one upon the other, and having the general form of the finished, casing.

This type of machine includes, in general, a rotatable tire-form or core upon which the carcass is developed by so-called stitchers, fabric-pressing rollers, or other instrumentalities which are adapted to roll and transversely stretch the first 'layer'of fabric on the core, after which additional layers of the fabric are laid and stretched one upon the other; the desiderat'um being to position, stretch and shape the fabric upon thecore without creases, wrinkles or air-pockets,-so that a product of high grade and of exact uniformity may be produced.

One of the objects of the invention is to provide a machine which is of compact form and convenient arrangement, and wherein are provided power-operated means for actu ating a large number of its mechanisms and parts so that manual operation thereof is reduced to a minii'num with resuitant in crease of speed, decrease of labor,

greater uniformity of product,

Another oo ect is, in such aemachine, to

provide certa n novel mechanisms instrumentalities for effecting automatic opera tion and control of the fabric-manipulating devices of the machine.

Another object is to provide means for maintaining the fabric-manipulating dc vices of the machine in accurate but yield ing relation to the tire-form or care while these devices are traversing the surface of the fabric as it is laid and stretched over the core.

Another object is to provide automatic deans which, at predetermined stages of the operation of certain mechanisms of themachine, arrest the operation thereof and permit other means automatically to restore the parts to normal position.

Another object within the contemplation of our invention is to provide, in conjunction with the tire-core and fabric-pressing'mechanisms" a stock-supplying structure whereby plied therefrom to the tire-core in a rapid and convenient manner and with the exer tion of a minimum amount of labor on thelayers of fabric may successively be sup-.

to be again set into motion for subsequent I building-up of the carcass on the core.

Another object of the invention is to provide driving mechanism, common to the tirecore and to the fabric-pressing mechanism, and which is preferably under electric controlvof the operator at all times both for starting and arresting its operation.

Another ohject'of the invention is to provide a pressure-fluid system for eiiecting operation of certain devices of the fabricpressingmechanism, and control of which is electrically accomplished for convenient and rapid starting and stopping of such. devices, both automatically and the wiii of the operator. i

Another object of the invention is to provide a convenient and easily manipulated trimming mechanism whereby the edges of thetire-fahric may be quiciziy and accurateiy trimmed preparatory to the finishing of the tire-structure;

Still another object of "the invention is to provide a novel and conveniently handled mechanism tor accurateiy positioning the heads or head cores, so-cailed, upon the fabric-covered core preparatory to overlaying the same with one or more iayers of fabric.

The invention has also other objects and advantages which wiii inspection of the drawings or will he made to appear description.

In order that the invention may be more readily comprehended, we have appended drawings hereto as a part of this disciosnre and in which we have illustrated, by way of example, an embodiment of the invention which has been demonstrated to be practical and hi lily eflicient; but it is to be underhereto appended in the foilowlng be apparent an bodiments other than that shown and also utilizations other than that illustrated, and all employing the underlying principles of our invention.

In these drawings: Fig. 1 is a view in perspective of one embodiment of the machine comprehended by the present invention; a

Fig. 2 is a view in top plan of the ma chine; Y

Fig. 3 is a. view in front elevation of the machine of this invention, omitting the described, are preferably sustained by a stock-delivery mechanism thereof;

Fig. 4 is a view in longitud nal section,

taken through the core-supporting means of.

the main machine element and looking toward the various fabric-pressing mechanisms;

Fig. 5 is a view in perspective of a coresup orting means and of fabric-pressing mec anisms juxtaposed thereto;

Fig. 6 is a view in partial cross-section of shock-absorbing means provided on the main drive of the machine;

Fig. 7 isa fragmentary view in rear elevation of the carriage-supporting pedestal;

Fig. Sis a similar view of the pedestal with some of the drive-mechanism of Fig. 7

omitted therefrom; v

Fig. 9 is a view in vertical cross-section of the pedestal, looking rearwardly;

Fig. 10 is a'view inhorizontal cross-section of the pedestal;

Fig. 11 is a detail view in section of a controlling-valve fora machine-positioned bead-ring cylinder Fig. 12 is a fragmentarv view in rear elevation .of the 'machine-positi ned bead ring;

Fig. 13 is a'view in, perspe tive of a manually-positioned bead-ring and its supporting means;

Fig.14 is a fragmentary detail view in section of a bead-ring-clenchi-ng mechanism; Fig. 15 is a fragmentaryview, partlyin cross-section, of an automatic device for governing single revolutions of "the corek shaft, as at slow speed;

Fig. 16 is a view in rear elevation of the same;

Fig. 17 is a view in side elevation of a type of stock-rack which may be employed 1 in conjunction with our tire-building machine; I

Fi 18isa view in top plan partly in secti n, of the. stock-rack; d

F1g.- 19 isa fragmentary view in perspec-' t1ve of a portion of the stock rack;

Fig. 20 is a'vlew in vertical section of a F gs. 21 and 22 are diagrammatic views of the wiring system installed *in our machine. i

The tire-building machine contemplated by our invention preferably includes three primary machineelements, namely, a stock vupon the main bed plate or base 1.

general supporting structure which includes aJmachine frame or base 1 of any desired form and dimensions.

2. Gore-supporting structure and core gcZ-m'oe.-'Any appropriate type of structure may be employed to sustain a core or tireform 2; but, in the present embodiment, we prefer to utilize-that herein disclosed as bemg effectively and. conveniently manipulated: This core (as best seen in Fig, 2) is provided with an annular groove 3 along its inner diameter whereby thecore may be 0 seated upon the extremities of a series of arms 4 which are extensible from a chuckcasing 5, in any'preferred manner, such as that illustrated, for instance, 'lI1 Fig. 4; the

arms 4 areinternally threadedfto receive screw-shanks 6v which carry beveled pinions .7 adapted to mesh with-a: master drivepinion 8 arranged within the hub interior of the-chuck .casin .This master pinion is I mounted upon a shaft 9 carrying a handwheel. 10 for manual control of the projection or retraction of the arms 4 1 The chuck casing 5 is secured, as a whole, by any appropriate fastening means, such as bolts, 11 upon a cap extremity 12 carried by "and rotatable with a shaft 13, the latter being jjournal'ed in groups ot' bearings 14 disposed in a suitable supporting structure,

suchas a core-supporting pedestal 15 erected- Alarge gear 16 'anda smaller gear 17 are fast-onfthe rear'end of the shaft 13 in order to provide a'varia-ble speed rotation for the shaft and. tire-.form' supported thereon.

Any suitable type of prime mover may be relied upon to furnish the drive power for the entire machine, the present embodiment of the invention preferably making use of an electric motor 18. This motor may preferably, although not necessarily, be of '120 what is known as the variable speed type, adjustment for speed being secured through the medium of the hand-shaft 19 which opcrates .in the manner well known to the art.

This motor carries a drive-pinion 20 upon its armature-shaft 21, such pinion meshing with a beveled gear 22 supported at one extremity of a counter-shaft 23 (Fig. 3), the latter being journaled' in bearings 24 which support it upon a motor-blacket 25 at one main drive motion being transmitted to secondary shafts 30 and 31 .(Figsg and 3) through the medium of worm and wormwheel connections designated in their entirety by the respective numerals 32 and The secondary shafts 30 and 31 are respectively mounted in suitable bearing-members 3434:'and 3535 arranged upon the core-' supporting pedestal 15, and are respectively provided at their other extremities with terminal gears 36 and 37. The gear 36 is preferably of large diameter and is adapted. to mesh with the small gear 17 on the coreshaft 13 and provides a fast-soeed drive for the core-shaft. The gear 37 is of smaller diameter and is adapted to mesh with the large gear 16 of the core-shaft to provide a slow-speed drive for such'shaft.

Each of the secondary shafts 30 and 81 is of a duplex construction and comprises a pair of alined shafts connected for rotation only by clutch- devices 38 and 39 for the respective shafts. These permit either of the shafts to be disconnected from the. positive drive. A more detailed description of the operation of the main drive means will presently be hereinafter set forth.

In practice, we have found it advantageous to provide a shock-absorbing means for the drive-shaft 1 3 in order that the inertia resistance of this shaft may-be gradually overcome and relieve undue strains upon the drive mechanism when the high-speed gears 36-17 are thrown into connection with this shaft. This shock-absorbing means is illust-ratedin Fig. 6, and includes a pair of frictional drive-plates 4.0 and 41. (one of which is movable relatively to the other), the former having a hub-portion 42 keyedupon the shaft 30 at 43 and at the point where the large gear 36 is mounted. The secondor movable plate 41 is provided with a hubportion 14 splined at 45 to the hub-portion 42 of the first grip-plate 40. The shaft 30 extends through the pair of plates 40 and 41 and carries an adjusting nut 46 between which and-the plate 41 is interpositioned an expansible coil-spring 47 which serves resiliently to press the plate 41 toward the fixed plate 40.

Each of the grip-plates is provided with I a frictional surfacing 48 in contact with oppositevsides of a web 49"which connects an outer rim 50 of the gear 36 with a hubv 51 thereof. This hub is mounted within an motion of the high-speed drive-shaft 30 which cannot be immediately transferred to thecore-shaft through the meshing gears. This is accomplished by a sliding of the friction plates 40 and 41 about the inner and outer surfaces of the gear=web 49. This pair of friction or grip-plates has such a highdegree of frictional contact with the gear-web 49. however, that it is only the initial inertia of the core-shaft which is sufficient to prevent the gear 86 from being continuously unified with the higl1-speed drive-shaft 3th The different degrees of frictional contact may be eiiected by adj usting the nut 46.

Fabric-manipulating mechanism.-=lux- .taposed to the tire-core and preferably sustained by the main frame 1, is a carcass forming structure which preferably comprises the following mechanisms and instrumentalities, and includes a presser-su'pporting and positioning carriage, its actuating mechanisms, etc., and between which and the core-supporting structure there is relative movement, with means for accomplishing such movement: These mechanisms include a pedestal 53 erected on a portion of the main machine bed 1 in such manner as to be radially adjustable in respect to the tireform. 2 and disposed centrally thereof in order that the pedestal may be.successively arranged for tire-forms of differing diameters. To this end, .trackway surfaces 5% ,(Fig. 1) are formed on the upper portion of the bed-plate 1 and grooves 55 are provided to accommodate headed nuts 56 which depend from the base of the pedestal Where tires of the same size are continuously manufactured on the machine, no adjustment of the pedestal is required.

The top edges of the pedestal 5-3 constitute tracks 57 fora presser-supporting and positioning. carriage 58 adapted to have. an advancing and receding movement in reiation to the tire-core. A stop-piste on the pedestal limits the rearward travel of the carriage 58 away from the tire-core.

4. Uawz'age and carriagaactuaiing mecha-nz'8m.h Iovement of the carriage on its tracks and, thus, in relation to the axis of rotation of the tire-form. toward and away from itma y be accomplished in any appropriate way for purposes of positioning instance, andby way of example. we have disclosed a "carriage-actuating mechanism which includes the following instrumen- I t'alities Forward movement of the resser-carriage, toward the core 2, is accomplished through the medium of a carriage advancing gear 60 (Figs. 9 and 10) carried by a shaft 61 arranged transversely of thepedestal 53 and supported by bracket-bearings 62.

for a partial swinging movement on an axis formed by a shaft 63. This shaft 63 is journaled in the sides of'the pedestal 53 and .wise direction (Fig. 9) will advance the carriage toward-the tire-form. This rotationis secured through the medium of afworm 67 secured upon the extremity of a shaft 68, the latter being mounted at one end in ,a bracket 69 which projects forwardly from the ped- I cstal 53. At the other end, the shaft 68 is mounted ina bracket 70 which projects lat-i erally from the pedestal. The shaft 68"is thus arranged (Fig. 2.) in parallelism to the main drive-shaft 26, and is provided with a gear71 which is in operative engagement- .with a drive-pinion 72 carried by theextremity of the main drive-shaft. Engaging with the worm 67 is a worm-wheel73, this latter being supported at the end of the cross-shaft 63 of the pedestal. This shaft carries v(in addition to the drive worm-wheel) a pinion 74 meshing with the drive-gear 650i the.

swinging shaft 61.

Then the gear of theflswinging shaft 61 is in engagement with its rack bar 66, the

continuously operating drive thereof-which is initiated through the main 1driveshaft26, thence through the pair of gears 72-71 to the stub shaft 68, thence through the 'worm and worm-wheel drive-connections 67-73,

and thence through the engaging gears 7465 serves to propel the'pr,essercz a.rriage 58 toward the tire-form 2 at a predetermined rate of speed; .5. Oarfiage-returning maham'sm.Whe the carriage has reachedits limit of vadvancement toward the tire-form, means ofan automatic nature are provided to throw the.

carriage-advancing gear 60 out of engagement with the rack bar 66 to permit a receding movement of the carriage from its advance-limit by a secondary power-operated means: This latter means includes the provision of weights 7 5 which are suspended by a flexible connection 7 6 (Figs. 1, 3 and 9) from ,a suitable anchor-bolt 77 provided at the extremity of the rack-bar 66. The flexible connection 7 6 is trained over a pulley 78 counter-clocks supported by a bracket 79 in rearward projection from the pedestal 53, in order that the vertical motion derived from the w e1ghtlmotor may be translated into the horizontal motion required for the retraction of the carriage to its rearmost limit,vi. e., the stop plate 59.

- The carriage-advancing gear-'60 is maintained in engagement with the rack-bar'66 and a ainst tendency of disengagement therewith (due to the weight of the gear 60,

its mounting-shaft 61, and the bracket-bearing 62 supporting such shaft for swinging .movement about the shaft 63) through the medium of a supporting arm 80. "This is carried upon a rock-shaft -81 journaled in' One wall of the pedestal 53, and normally engages, in the vertical position of Fig. 9, with 'tionfiillustrated in Figs. 7' and 8,- and y a contractile spring--84.

6. Carriage-arresting me'ahlzm'sm.'-As the carriage 58 moves forwardly, i. e., toward the tire-form, .a'manually-positionable trip- Y means (suspended laterally from the carriage and in 'the'path of the upright triparm 83) will-he capable of engagingsuch' arm and of moving it'from and maintaining V it out of its normal vertical position. This. movement of the arm83 is communicated to the support-arm 80, carried upon the rockported by the arm 80, the drive-gear 60 will then swing'downwardly, due to the weight of the parts; until checked by the lower edge of the slot 64 formed in the wall of the pedestal 53 through which the "shaft 61 projects. While this swinging movement of the shaft 61 d sturbs none of the operative drive connections which continually rotate it, the rack-bar 66 will be released from its engagement with the gear 60 and, vthus, forward or advancing movement of the carriage will accordingly be arrested automatically. This leaves the carriage subject tothe retractive movement initiated by the weights-75 (these weights having been lifted vertically as the carriage 58 has advanced horizontally toward the tire-form) to return it to starting shaft 61by means to be describeduntil.

the supporting arm 80 is returned to its normal position by the spring 84. The shaftlifting means, referred to, comprises a handle-bar 85 mounted in a socket 86 formedupon one of the bracket-bearing members 62, and as illustrated in Figs. 7, 8, 9 and 10.

- The advancing movement of the pressurecarriage must be varied in distance inaccordance with the nature of the work to be performed, and this is accomplished by the manually-positionable trip-means. In the present instance, these means include a shaft 87 (Figs. 7 and 8) journaled in suitable brackets 88 secured on the side'of' the carriage 58. Adjustably mounted upon the shaft 87 are oppositely-extending trip members 89 and 90, only one of which may be swung into the path of the trip-arm 83 at a time. The extremity of the shaft-87 is provided with a. knurled hand-nut 91 and with an adjustable-disk 92. By grasping the nut 91, the operator is able to place either of the trip- members 89 or 90 into the correct position for actuating the trip-arm 83. The adjustment plate 92 is provided with a number of radial slots at its periphery, with which is adapted to engage a keeper-arm 93, such arm being pivoted at 94 upon a shaftcollar 95 in proximity to the adjustment disk 92 and in which collar the shaft is rotatable.

7'. F abm' -pres's'ing mechanism.-It is now in order to describe the fabric-pressing mechanism, which, in the present instance, preferably includes three generalstructures, namely: first, tread-laying rolls supported upon the front portion of the pedestal 53 for the urpose of laying the center of any fabric-p y initially into contact with the surface of the core, or with that of a previouslyapplied layer of fabric ;secondly, the fabricpositioning and pressing mechanism mounted and traveling with the carriage 58 and designed to effect the laying of the fabric-plies aboutthe tire-core; and, thirdly, a group of fabric-laying rolls adapted for the sole urpose of laying down portions of the 11:11

plies of fabric.

The tread-rolling mechanism for any ply of fabric is utilized in order that a ply of fabric may be secured in place upon the t1recore preliminary to the action ofthe fabricpositioning and pressing devices, which might distorta ply of fabric were its center not first secured in place. The tread-rolling mechanism includes a pairof rolls 96 (Fig. 4) which are preferably concave in neral outline and taper from their bases to t eir smaller outer extremities. A supporting sleeve 97 for each roll is movably mounted upon a bolt 98 and formed with a stem 99 which extends axially through the roll and presents the latter with its concave surface toward the tire-core. Each of the sleeves 97 is provided with an outwardlyrprojecting arm 100, to

which is secureda contractile coil spring 101 having its. opposite extremity fastened 10' 21 bracket member 103, upon which member the plate 102 carried by a lateral projection on outer extremities crossing at a slight angle, which is flattened out when the rolls are forced a ainsttheconvexity of the core, and

against -t 1e action of the contractile springs 101 which control the normal position of the roll-mounting sleeves 97. These tread-laying rolls are positionable by. means which include abracket 103 upon which both rolls 96 are commonly suppgrtedpwThis bracket is secured to the outer extremity of a piston 104 (Fig. 3) operable'in a fluid-pressure-cylinder 105. Compressed air, or like pressure-fluid, is conducted to the cylinder through piping 106 which has interposed ata suitable point upon the line a leak exhaust-valve 107: This piping terminates within a control-valve housing 108. The compressed air (delivered from any suitable source, such as at 109, Fig. 2) is led to a filter 110 in which all impurities liableto effect a deterioration of the machine parts that are exposed to the air-flow are removed. From the filter 110 extends a line 111 which has a branch 112 (Fig. 2) connectmg with the valve-housing 108. A vertically depressible valve-stem 108 '(Fig. 3) mounted within the housing 108'and is-normally kept seated by resilient means (not shown) to prevent communication between the inlet air-branch 112 and the pipe-line 106 whereby the pressure-fluid is to be conducted to the cylinder 105. The stem108 projects above the valve-housing and into the path of travel of an arm 113 attached to the rear portion of the carriage '58.

When the carria'geis in its position of rest, that is, in its starting position, the arm 113 is out of engagenient with the valve-ste n; but the latter is so positioned that the initial advancing movement of the carriage results in a portion ofthe arm 113 engaging the 'depressible stem of the control valve 108 and of unseating the latter to admit air into the cylv inder through the conducting line 106. The valve is only momentarily unseated, but this is suflicient to admit the proper amount of air to'actuate the piston 104; that is to say, the pressure-fluid enters the cylinder 105 and raises the piston 104, with the treadlaying rolls carried thereby, directly toward.

the tire-form and into contact with the ply of fabric which has been pulled thereon bv the operator. The amount of air admitted into the pipe-line lOG is gradually exhausted through the valve 107, and the piston then returns to its original position by gravity.-

The springs 101 insure a resilient contact be tween the rolls and the fabric such that the positioned thereby in relation to the tireorm is aset of fabric-manipulating devices which, in ths instance, are primarily designed, as fabric-pressing members or mounting. in the apertured extremities of op-' positely-disposed bell-crank arms 116. These arms are each provided with a terminal boss, or enlargement, 117 which. isapertured in order to receive a pin 118 for pivotally mounting the'arms 116 at the extremities ofrespective levers 119. These levers are, themselves, pivoted as at 120, adjacent their rearmost extremities, to the top of the caro w tremity being pivotally mounted '123 which projectsinwardly from the oppo- 'sponding levers.

riage 58,

The pivotal movement provided for the arms 116 with respect'to the levers upon which they are mounted renders these arms adjustable in order that their workin angle may be predetermined and fixed as esired, at any time. Adjustment'mea'ns for varying the angle of the arms 116 include 'turn-' buckle links 121, one extremity of each turnbuckle being secured to a boss 122 formedupon the lever 119, and the posite exon 'a lug sitely-disposed arm 116, in order to provide a leverage whereby the arm may be moved about its pivot by proper manipulation of the turn-buckle link. Stop means are preferably provided to hold each arm 116 in the adjusted position determined by its link 121,

and such means includes a thumbg-screw 124 threaded through a second lug 125 projecting from the arm 116 and into en agement with a socket 126 formed upon t e upper surface of the lever upon which the particular arm 1-16 is supported.

The fabric-rollers, carried by the levers 119, are adapted resiliently to engage the fabric-covered tire-core '2 and, to this end, spring means 127 (Fig. 2) of an expansible type are rovided, these being supported upon brac et arms 128 projecting laterally from the resser-carriage 58 and engaged against the boss 117 upon which the respective arms 116 are pivoted to their corre- The function of the springs 127 is to efiect a pressure on the swinging levers and, thus, cause the press-.

ing-rollers thereon to be moved toward the core and maintained, with a yielding effect, on the surface of the core. I

There are,',as shown, a pair of the fabricpressingrollers 114 and these are arranged in spaced relation. They are adapted to be positioned with respect to the tire-form, in a double manner; that is, in part by the carriage and in part by the instrumentalities just described. The carriage is, therefore, a resser-supporting and positionin structure, and the presser-rollers are independently actuatable thereon with respect tothe rotating tire-core, first, to en age the sides of the successive layers of fa r1c stretched on the same and, then, to roll these layers down upon the form and upon each other.

In order that the fabric-rollers may be. separated from all contact with the core, after they "have completed their function of laying down any ply of the tire-carcass, and prior to the retraction of the carriage, there is provided a two-way fluid-operated cylinder 129 as a means for accomplishing this result, such means including the following structure.

In the pneumatic cylinder 129'is a pair of pistons (not shown) 'slidable in opposite directions, and each of which mounts a pistonrod 130, secured to bosses 122 of the corresponding levers 119 by upright pins 131. When air, or a similar pressure-fluid, is admitted into the two-way cylinder 129 through a central port 132'therein, the cylinder-pistons will be moved in divergent di-' vrections to produce a similar effect "between the fabric-rollers 114 and simultaneously disengage the rollers from the core.

The

carriage 58 is then free to be retracted to starting position without danger of injury to the freshly applied tire-ply by the fabric rollers.

main air-supply filter llOthrough automatic means which will presently be hereinafter set forth in detail. A, leak-exhaust valve 132 may be placed in the top of the pneumatic-cylinder to exhaust air therefrom when the supply. has been cut off.

The pneumatic-cylinder 129 is connected to the top of the presser-c'arriage 58 by a supporting member 133 which terminates in a triangular, or wedge-shaped, enlargement The pneumatic-cylinder is preferably supplied with pressure-fluid fromthe 134 (Fig. 2) designed to form a stop ,for

eration of the pins 135 will be understoodfrom an inspection of Fig. 9, in which it will be seen that these pins are vertically of the hollow top provided for the carriage 53. The pins are positionable to limit pivotal movement of the levers 119 during a portion only of the forward travelof the levers 119, and are designed then to be removed, i. e., withdrawn from their projected position through the top of the carriage just following-the contact of the presser-rollers with the fabric-covered core. The withdrawing means operable upon the pins 135 is, in this instance, automaticin its operation and includes centrally-pivslidable within'a boss 137 formed inwardly oted levers 138 (one for each pin) housed within the carriage and connected at one end to. corresponding caps 139 formed at the base-of'each m and, at the oppo site end, to a link 140 attached to an arm 141 carried upon the rock-shaft 142 (Fig. 9). The latter is journaled in the sides of the carriage itself, projects therefrom as shown in Fig; 3, and carries on its exposed extremity an operating arm 143.

. 59, the rock-shaft 142 occupies such-aposltion that the bolt pins 135 are projected through the carriage-top, the spring 144 exerting a yieldable pressure between the rock-shaft-arm 143 and the stop-member.

' As the advancing movement of the carriage is initiated, the rock-shaft-arm is freed from the stop 145; but the spring 144 is not of suflicient power to rotate the rock-shaft 142 in a counter-clockwise direction and, thus,

'to withdraw the pins from their projected position at that time, because these are then being held by the springs 127 and. levers 119. These levers 119 have a frictional engagement with the pins 135 due to the action of the springs 127 upon the forward ends ofthe levers This frictional engagement, existing between each lever and its pin, is sufficient to prevent any'rotation of the rock-shaft as the carriage moves for ward until the presser-rollers 114 are brought into contact with the fabric-covered core. The initial contacting of the rollers with the core so counteracts the action of the springs 127 that the frictional engagewent between each lever and its limitin is eliminated and this permits the exten ed spring 144 to rotate the rock-shaft 142 and withdraw the pins.

After the .separated presser-rollers have traversed the largest 'diametral portion of I the core, they must again approach each other as the pressing operation continues toward the very edges of the fabric upon theneck of the core 2. Here, where the diametral dimension of the core is smaller, the pressers 114 must necessarily be spaced apart a shorter distance than is permitted when the pins are in their projected position. To permit this, the .pins are withdrawn below the-plane of the levers 119 and, as the pressers 114 them-approach each other, the rear extremities of the levers 119 swing over the openings which the pins 135 had previously occupied. The pressurefluid is then admitted into the cylinder 129, as has already been explained, to separate the pressers from contact with the core, in order that they may be. moved backwardly with the carriage without further engagement with the core. Suflicient pressure is maintained within the cylinder 129 to force the rear extremities of both of the levers 119 against the triangular stop 134, leaving them again clear of the space which the pins 135 occupy when projected.

As the carriage .58 returns to its starting position, the rock-shaft-arm 143 is again engaged by the stationary stop-member 145 and the rockshaft is rotatedagain to project the pins above the surface of the carriage-top. Immediately thereafter, the airsupply for the cylinder 129 iscut off, and the pressure within the cylinder is exhausted through the leakeval've 132. to permit the -tal 53 and provided with a non-registering,

inlet 147 and outlet 148. Communication between the inlet: and the outlet is established through an inlet-chamber 149 and an outlet-chamber 150 and which are normally cut off by a valve-member 151 which is held seated between the chambers through the 105 action of an expansible coilesprin 152. The latter acts upon the top of the val ve-member 151 and is held in place by a removable cap 153 which gives access t'o'the inlet-chamher 149. The valve-member 151 is provided 110 with a stem 154 which extends through the lower portion of the valve 146 and projects therefrom into'the path of a movable core-member 1550f the solenoid 156. The

latter is mounted immediately below the '11 valve 146 in such-manner that energization of the solenoid forces its core-member 155 upward into contact with the stem 154 to unseat the valve 151 and permit communication between the inlet 147 and the outlet 148 of the valve-casing.

In order to. render the operation of this valve automatic, it is only necessary that the electric-circuit controlling the solenoid be led through a pair of make-and-break de- 125 vices arranged upon the pedestal 53. The first of these includes a contact-plate 157 (Figs. 3 and 9) supported uponthe pedestal through the medium of an'insulating plate 158. The rock-shaft 81, which carries thev support-member 80 for thecarriage-advancing-gear 61, projects through the wall of the pedestal and into proximity to this contactplate 157 and carries a contact makeand-v brcalr arm 159. This arm is thus moved at the time that the gear-support-arih 80 is removed from below the shaft 61, that is,

, at theterinination ofthe advancing. movement of the presser-carriage. The movement of the arm '80, in the counter-clockwise direction of Fig. -9, also serves, at the same time, to force the contact-arm 159 against the plate 157, thus completing the electrical circuit through the solenoid 156 which, .in

turn, unseats the valve-member within the casing 146 and permits the pressure-fluid to flow through the valve-casing and into the cylinder 129. In this manner, the pressers 114 are automatically separated from the tire-core at the time that the carriage reaches its limit of-advancing movement.

The pressure-fiuid is maintained within the cylinde'r'129 until thecarriage 58 has returned to starting position and is in contact with its limit-plate 59. The levers 119 must remain in engagement with the-triangularstop'134 to permit the stop-pins 135 to. resume their projected position above the top of the carriage. This they do only after the carriage has been fully retracted andafter the pin-projecting arm 143 has engaged the stop-member 145. During all of this time, the contact remains made between the arm 159 and its coacting plate 157,

since the rock-shaft 81 is prevented u from returning to its normal position, under the action of the contractile spring 84 (Fig. 8),

for the reasonthat the gear 60 carried by the swinging shaft 61 remains displaced from meshing engagement. with the carriage-rackbar 66, and will so remain'until the operator manually reengages the gear with this rack.

It will thus be apparent that the pressure-fluid would ordinarily not be exhausted from the cylinder 129 by the time that the carriage-58 has again begun its advancing movement. This is at once initiated when the swin' ing shaft-gear 60 is meshed with the rackar 66 of the carriage, unless some means auxiliary to the makerand-break con.- tact, just described, is employed to open the electrical circuit and automatically close the a r-valve 151 by deeiiergization of the controlling solenoid thereof': The auxiliary. means here shown includes a lever 160 (Fig. 3); pivoted at 161, to a supporting arm 162 carried upon a bracket-plate 163 which is secured to the side of the pedestal 53. This bracket-plate also supports a c'ontacta'irm 164 which, is interposed in the path of movement of alever-arm 165. spring l66'normally engages the lever-arm 165 with the contact arm 164 and closes the electrical circuit through the solenoid within A contractile which circuit the two arms are interposed and which would be interrupted were these lever and contact-arms separated. In order to. separate the arms automatically i when the carriage has returned to starting position,- there is rovided a pin 167 which projects o'utwar ly and laterally R from the prezser-carriage a suflicient distance to enga e with the leVer 16Q, as shown in Fig. 3.

TV on the presser-carriage travels forward toward thetire-core, the lever 160 is maintained by its spring 166 in the position which completes the electrical circuit through contactarms 164 and 16 5. Upon return to starting position of the carriage and when it engages. the stop-plate 59, the pin 167 en.

gages and moves the lever 160 in the clock- 1 wire direction of Fig. 3 until the pair of contact arms are disengaged, thus breaking the circuit and deenergizing the solenoid .regardless ofthe fact that the contact 157 159 has not yet been broken.

This mechanism also prevents undue sparking which would result were the smaller surfaced contacts 157 -159 employed to break the circuit. By

this means, the supply of pressure-fluid-eto the cylinder 129 is cut off when the pres-:er-

carriage has completed one cycle of its movement. permittingany surplus fluid in the cylinder to be exhausted through the leak-valve 132 and permit the levers 1-19 to move backto their original positions, as determined by their. respective stop-pins 135, the latter beingnow in their projected position above the top of the carriage.

[In addition to the 'fabric-pressingmemposed on the pedestal 53. These ply-rolling members 168 are shown as conoidal disks an gularly mounted by stems 169 within supporting arms 170. These arms are pivotally arranged at the extremity of lever-members 171 which project upwardly from axles 172. These axles are journaled in bearing-meme bers 173 supported immediately below the tire-form in any suitable manner. The axles 172 terminate in shaft-ends 174 upon which are keyed a pair of meshing gears 17 5. Sup

ported by a bracket 176 in mesh with one of the gears 17 5 is a control-gear 177, upon the stub-shaft of which is dispo:ed a leverarm 178 terminating .in a foot-pedal 179. It will be obvious that depression of the foot-pedal will ,causean opposite rotation on

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