US1268909A - Tile-press. - Google Patents

Description

F. B. YINGLINGA TILE PRESS. APPLICATION mzo' MAY 9. I914.

Patented June 11, 1918.

5 SHEETS-SHEET I.

F. B YINGLING.

TILE PRESS.

APPLICATION FILED MAY 9 1914.

Patented J um: 11, 1918.

5 SHEETS-SHEET 2.

F. B. YINGLING.

TILE PRESS.

APPLICATION FILED MAY 9. m4.

Patented June H, 1918.

5 SHEETS-SHEET 3 Ina,

F. B. YINGLING.

TILE PRESS.

APPLICATION FILED MAY-9.1914.

1,268,909, Patented June 11. 1918.

5 SHEETSSHEET 4.

F. B. YINGLING.

TILE PRESS.

APPLICATION FILED MAY 9. 191

am L 11W m4 Hm IF. F. H M 5 n nu t a P TILE-PRESS.

messes.

Specification of Letters Patent.

Patented June 11, 1918.

Application filed May 9, 1914. Serial No. 837,536.

T all whom-it may concern."

Be it known thatI, FRANK B. YIN LING,

a citizen of theUnited States, and resident of Hamilton, Butler county, State of Ohio,

have invented certain new and useful Improvements in Tile-Presses, of which the following i a specification.

y The present invention relates to improvements in tile presses.

Such presses are required to operate upon clay or other suitable material in a powdered or fine granular form, which materialhas a tendency to en trap the air within itself when pressure is applied, resulting frequently in wind blown or laminated tile, owing to the contained air preventing close union of the particles of clay. It is necessary that the finished tile be firm and strong and this can only be accomplished by subjecting the material to great pressure and insuring that the air contained in the clay in its J normal loose conditionis permitted to escape before the pressing operation is completed. As the dies by which the pressing is effected must fit rather snugly within the mold case, r

they have a tendency to prevent the escape of airas freely as wouldbe the case if, the dies were only loosely fitted Within the mold. The tile must, of course, be uniform throughout, whichrequires that the material be evenly disposed in the mold and not unto either the top or bottom dies and heat must be supplied around the die and mold cavity to keep the damp clay from unduly adhering to the dies.

A press which meets all of the require ments above noted is provided by the present invention which will be described in connection with the embodiment thereofiillustrated in the accompanying drawings, in which I Figure 1 is a side elevation;

Fig; Q is a front elevation; y

3 is a rear elevation;

Figs. f to 9 illustrate the several relative positions which the essential parts of the machine occupy at different times in each cycle of operation. In these figures several of the parts are shown conventionally as. the views are more or less diagrammatic;

Fig. 10 is a detail view partly in section of the upper actuating toggle member and its supporting means;

Fig. 11 is a more or less diagrammatic view illustrating the means preferably employed for limiting downward mdvement of the lower die at one step of the cycle of op eration produced by each rotation of the power shaft when it is required that the tile be pressed near the top of the mold or at an intermediate place between the top and bottom of the mold case.

In some of its features as regards ar- E, a pitman F connecting the die toggle with a crank onthe power shaft B, a clay reservoir or hopper G and a reciprocating mold charging device adapted to be reciprocated by suitable cam mechanism actuated by the shaft B to convey a charge from the hopper G to the mold casing.

The support H for the lower die D is carried by slides I fitted in suitable guides on the framework A; and the shaft K constituting the pivotal support for the upper member of the toggle I1 is mounted in bearings in these slides I. The bearing portions of the shaft are positioned eccentrically to the intermediate body section and to one end of the shaft is suitably secured a crank M which is connected by a rod m with one arm of a bell crank M mounted on the frame of the machine and having its other arm provided with a roller m with which a cam M? on the power shaft B cooperates, whereby the eccentric, toggle supporting, shaft will be rocked in its bearings during each rotation of the shaft B. In the embodiment of the invention illustrated the crank M is provided with a sleeve that surrounds the shaft cranks, M, M, and thereby control the amount of second pressure adj ustmentof the toggle L produced by rockin the shaft K.

The pitman F is provide on its lower face with a cam .plate F that is adapted to cooperate with a roller F mounted in the main frame to effect simultaneous vertical movement of both of the dies, for ejecting the tile from the mold. The capacity of the mold or the quantity of material it can re eeive is regulated by stop S and hand-wheels S and screws S.

Clay is suitably supplied to the hopper or receptacle G and a quantity thereof suffieie l; to form a tile or number of tiles to be produced. at each complete operation of the machine is periodically transferred from the hopperto the mold casing by a reciprocating charging device N. It will be understood that with a given adjustment of the parts of the toggle mechanism the ultimate travel of the die plates toward each other is the same, thus producing tile of uniform thickness; but

the density is regulated by the amount of clay in the mold. The charging device comprises a rectangular shapedframe and a rearwardly extendmg plate or cut off member N, which prevents escape of imiterial from the hopper when the tubular section of the charging device is out of alinement with the opening in the bottom of said hopper. The charging device is provided at each side with a rearwardly extending rod or link a, the rear ends of which rods are connected by a crossbar n and are adapted to be engaged by a pair ofarms n mounted to rock about a common axis in the frame of the machine and one of which has at one end an upwardly extending arm n which at its outer end is provided with a roller a? cooperating with a earn 1}? on the main power shaft B.

By the construction and arrangement of parts illustrated herein the charge of clay within the mold box or casi 11g is. subjected to two distinct compressing actions by a single rotation of the main power shaft, the second ofsaid compressing actions being materially stronger or heavier than the first. During the interval between said suceessive conipressions the charge is relieved from pressure of the dies so that the air entrapped in the mold mayfreely escape. The niranner in which these several operations are effected will be clear from a consideration of the: drawings, particularly of Figs. 4 to 9.

In Fig. 4' the parts are shown in the positions oeeupied at the completion of a pressing operation with the Lower die raised to the top of the mold box or casing and the upper suitabletable or conveyer.

device.

die separated therefrom so that theufinished tilp nay be pushed from the lower die onto a The charging device N, as the shaft B turns in the direction indicated by the arrow in Fig. l, is actuated by the cam thereon to force the completed the from the lower die and carry a suitable charge of clay over the lower die in the mold box or casing. The relative positions of the several parts at the completion of the forward stroke or movement of the charging device are illustrated in Fig. 5. Referring to this figureitwill be seen that the pitman Fhas been advanced so as to open the toggle L toka greater extent than in Fig.4, butthe lower die is maintained in its uppermost position by the engagement between the cam F and roller F 111 moving from the position shown in Fig. 4: to thatshown in Fig. 5 the bell crank M is actuated to return the arm M and eccentric shaft K tothe position in whichthe upper end of the toggle L is at its maximum distance from the mold box and lower die. It will be seen that the stroke of the charging device of such length that i at the forward limit thereof a portion of the charge receptacle is beyond the front wall of the mold box or casing. This is important as it avoids any possibility of the clay being undesirably caked or compacted in one per tion of themold box more than another,

during the return movement of the charging As the shaft B continues to turn and the'parts arev brought into the position shown in Fig, 6, the pitman F is lifted from contact with the roller F and the slides I and lower die are permitted to move down sufficiently to form the necessary cavity in the mold box or casing to receive most of the charge of clay contained in the device Such ,downward movement of the lower die is limited by a stationary but vertically adjustable stop S. In Fig.7 the charging device is shown position beneath the hopper G, the. moldcavity containing'the charge of clay to be compressed and the pitman having begun its return movement toward the right which movement acts to straighten the toggle L. The cam controlling the actionof the bell. crank M is of such form that during the movement of the shaft B effecting the adjustments represented in F 5 to. 7 no movement is ianparted to the eccentric shaft K. The continued movement of the pitnian toward the. right from the position shown in Fig. 7 acts to straightenthe toggle and cause the upper die to enter the mold box or casing and lightly compress the charge of clay therein. the lower die being as previously stated held from downward movement at thi time by the stationary stop S cooperating with its lower end.

As the shaftB rotates the pitman. earrice the central pivotal. connection of the CIT toggle L past the vertical line connecting the top and bottom toggle pivots, thus liftmg the upper die slightly. During this movement the eccentric shaft K isrocked by the act on of the bell crank M shifting the arm M into the position shown in Fig, 8,

thus shortening the distance between the upper end of the toggle L and the top of the mold box or casing, and lower die, the parts .at this time being in the position shown 111 Fig. 8. The compression imparted to the clay b8 the straightening of the toggle ust re erred to is relatively light, e mg however, suflicient to remove the contained air therefrom and the slight upward movement of the upper die caused by the breaking of the toggle during the rightward movement of the pitman F from the position shown in Fig. 8 is sufficient to remove pressure from the clay and permit the air or wind therein entrapped to freely escape upwardly.

s the power shaft turns after breaking the toggle by rightward movement from the position shown 111 Fig. 8, it will be seen that after the pitman has reached the limit of such rightward movement and again moves toward the left, the toggle L will be again straightened to exert a second pressing action upon the clay within the mold box (the parts being then in the positions shown in Fig. 9) and owing to theadjustment of the eccentric shaft K above referred to this second compression will be materially heavier or more intense than the compression effected by the former or first straightening of the toggle. This final, heavier, compression completes the formation of the tiles and as the toggle is again broken by the continued leftward movement of the pitman, both .of the dies are carried upward or into the positions shown in Fig. 4 with the completed tile in the path of the ejector. connected to the charging device N.

To adapt the machine for making tile of? different size and thickness the mold box or casing and the faces of the die may be provided with suitable liners or facing plates and alsomeans are provided for positively varying the relation of or distance separating the dies. As shown, the stationary stop or abutn'ient S of the lower die may be adjusted vertically by means of screws S supported on the frame of the machine hand. wheels S and to permit of adjusting the upper die for difierent thicknesses of t le the eccentric shaft K is referably mounted in an eccentric bushing This bushing is provided at its end with toothed segments T with which mesh pinions T on a shaft U. The bushing is surrounded by a sectional casing V formed as the top of the tog le L and with clamps the members cf whic are secured together by bolts V. B loosening the bolts V and manipulating t. e shaft U,

by means of a suitable wrench for example, the eccentric bushin T can be adjusted as required for determining the thickness of the tile and the parts secured in such and 'usted osition by again tightening the olts V Referring to Figs. 2 and 10 it will be seen that if the eccentric bushing T is rotated so that the section thereof of maximum thickness is above the shaft K,- the toggle will be bodily adjusted vertically relative to the axis of said shaft and thereby the relation of the upper die to the lower die varied so that the machine will press a tile of different thickness from that which will be produced with the parts in relation shown in Fig. 10. The eccentric bushing T is made in two sections, each comprising a cylindrical member having at its outer end a toothed segment T.

As indicated in Fig. 11, positive stops may be provided for limiting downward movement of the upper die and in such event the lower die will be caused to move above the position which it would occupy during the. first pressing operation, as previously described, in order to effect such pressure. As the dies are separated at the completion of such first pressure, means are provided for limiting downward movement of the lower die, said means, as shown in Fig. 11, comprising a longitudinally extensible latch R pivoted on a shaft R mounted in bearings on the frame of the machine, and adapted to be moved to and from a position beneath a shoulder on the lower die. The shaft R is provided with an arm R which is connected by a link R with one arm of a bell crank R the other arm of which has a roller extending into the path of a suitable cam R actuated by the main power shaft. As the shaft rotates the cam R will actuate the bell crank R and rock shaft R to move the latchR to and from position to limit downward movement of the lower die. While the dies are separated and the eccentric toggle supporting shaft is being adjusted the tile will not be subjected to pressure from either of the dies and the air contained therein can therefore freely escape. The second or repress movement first lowers the top die, as far as permitted by the stops thereof, and then raises the lower die. At this time the cam F contacting with the roller- F begins the ejecting movement of the lower die. By the arrangement illustrated in F ig.-11, it will be seen that the travel'of the upper die will be stopped and the lower die raised to effect the first pressure and the lower die held within a fraction of aninch of the clay while the latter is relieved from the pressure of the upper die and the distance between the dies is varied for the second pressure. This results in the pressing of the tile near the top of the mold cavity and as the eompletedtile is required to travel a.

shorter distance in being ejected from the mold than in the arrangement first described the corners of the tile are not so liable to be damaged as it is forced upward. This arrangement also provides for pressing the charge of clay first from the top, then from the bottom, then pressing both the top and bottom and finally applylng pressure to the bottom as the tile is ejected.

It will be evident that the second re press movement or compressing action might be obtained by means specificallydifferent from those illustrated and described.

The press herein described is adapted for making various classes of architectural tile, such aswall, mantel or floor tile. This tile varies in size from 9 inches in length or width by inch to g inch in thickness, to inch square by -1- inch thick. Such tile are made in many different conditions of clay varying from an ordinary native clay to fine English china clay in combination with flint and stone or other material necessary to produce a tile meeting the desired requirements. Such tile must, of course, be true to size as determined, within small toler ances, and this necessitates that the press be of such character that the dies come together within a predetermined distance, regardless of the varying quantity or temper of the clay and that the dies fit rather snu lv within the mold case. The conditions, therefore, under which such presses must work and the material to be acted upon differ greatl from those which are present in the m-anu acture of brick and for these reasons presses having many parts generally similar to those hereinbefore described, althoughadapted to manufacturing bricks, are not capable of satisfactory use in pressing tile.

Having described my invention what I claim and desire to secure by Letters-Patent is, l

1. In a tile press, the combination of upper and lower dies, an eccentric shaft, a sinle to le havin its members res )ectively 235 b connected to one of the dies and to said shaft, means for extending and breaking the toggle to operate the dies twice during each cycle of operation, and means for automatically turning the eccentric shaft to vary the relation'between the toggle actuated die and the other die between the successive pressing movements of the dies occurring during each cycle of operation, for the purpose described. g

2. In a tile press, the combination of upper and lower dies, a single toggle having its lower end connected with the upper die, means for extending and breaking the toggle to shift the upper die to and from operative relation to the lower die twice during each cycle of o eration, and means for automatically varying the distance between the upper die and upper axis of the toggle between the successive pressing actions-occurring during each cycle of operatlon independent of that due to movement of the toggle, for the purpose described.

3. In a tile press, the combination of a support for the lower die, a power shaft,

means connecting the shaft and toggle and adapted to extend and break the toggle twice during each rotation of the shaft, means for effecting simultaneous vertical movement of the two dies, and means for varying the relation of the toggle to the bars or rods connecting it with the lower die between the successive pressing operations imparted to the toggle during each rotation of the shaft, whereby the second of said pressing operations will be stronger than the first.

' 4:. I11 a tile press, the combination of an upper die, a lower die,bars or rods attached to opposite sides of and extending upward from the support for said die, an eccentric shaft journaled in hearings in said bars, a togglehaving one member connected with the upper die and its other member engaging said eccentric shaft, a power shaft, means connecting the power shaft and toggle and adapted to extend and break the toggle twice during each rotation of the shaft, means for effecting simultaneous vertical movement of the two dies, and means actuated by the power shaft for imparting rotary movement to said eccentric shaft between the successive pressing operations imparted to the toggle during each rotation of the power shaft, for the purpose described.

5. In a tile press, the combination of an upper die, a lower die, bars or rods attached to opposite sides of and extending upward fromthe support for the lower die, a toggle having one member connected to said bars and its other member connected to the upper die, a power shaft, a pitman connecting the toggle with means on the power shaft adapted to reciprocate the pitman to extend and break the toggle twice during each rotation of the shaft, means cooperating with the pitman for effecting simultaneous vertical movement of both dies, and means for varying the relation of the toggle to the bars connecting it with the lower die between the two pressing operations imparted to the toggle during each rotation of the shaft, whereby the second of said pressing operations will be more powerful than the first.

6. In a tile press, the combination with upper and lower dies,- of bars or rods connected with one die and extending past the other die, a toggle having one member connected with the last said die and its other member connected with said bars, a ower shaft, connecting the pewer shat and toggle and adapted to extend and break the toggle twice during each rotation of the shaft, means for effecting simultaneous vertical movement of both dies, and means for varying the positions of the toggle and die connected therewith relative to the other die between the two pressing operations imparted to the toggle during each rotation of the shaft, for the purpose described. a

7. In a tile press, the combination of upper and lower dies, a single toggle for actuating one of said dies, means for extending and breaking the toggle to move the die connected therewith to and from pressing relation to the other die twice during each cycle of operation, and means for automaticallyv efiecting bodily I longitudinal movement of the togglebetween the successive pressing actions occurring during each cycle of operaj tion, for thepurpose described.. a a 8. In a tile press, the combination of a lower die, an upper die, a toggle having one member connectedto the upper d1e and ts other member supported by an eccentric shaft, a power shaft, means connecting the power shaft and toggle and adapted to ex- 9. In a tile press, the combination of a lower die, an upper die, atoggle having one member connected to the upper die and itsr other member supported by an eccentric a ,power shaft andtoggle andadapted to ex tend and break thelattertwlce during each shaft, a power shaft, means connecting, the

rotation of the shaft, a bell crane; having one arm connectedto the eecentrlc shaft, and a cam rotated by thepower shaft and engaging the other arm of the bell crank, whereby theeccentric shaft will be adjusted to vary the position of the toggle and upper die relative to the lower die between the successive pressing operations imparted to a the toggle during each rotation ofthe'power shaft. I a a 10. In a tile press, the lower die, an upper die, a tOggleleVer having'one member connected to the upperdie and its other member supported by an eccentric shaft, a power shaft, a pitman connected with the toggle, means rotated by the powershaft and engaging the pitman to reciprocate the latter and extend and break the toggle twice during each rotation of the power shaft, means for simultaneously moving both dies vertically, and connections between the power shaft and the eccentric toggle supporting shaft whereby combination of the eccentric shaft will be adjusted to vary the position of the toggle and upper die relative to the lower die between the succes sive pressing operations imparted to the tog. gle during each rotation of the power shaft.

11, In a tile press, the combination of a lower fdie, an upper die, a toggle lever hav- I ing one member connected to the upper die and its other member supported by an eccentric shaft, a power shaft, a pitman connected W1tl1 the toggle, a crank rotated by the power shaft and engaging the pitman to reciprocate the latter and extend and break the toggle twicejduringseach rotation of the power shaft, means for simultaneously moving both dies vertically, a bell crank having one arm connected to said eccentric shaft, and a cam rotated by thepower shaft and engaging thebell crank, whereby the eccentr c shaft will be adjusted to vary the a position of the toggle and upper die relative to the lowerdie between the successive pressing operations imparted to the toggle during each rotation ofthe power shaft. i

12. In a tile press, the combination of a rotation of the shaft, means connecting the lower die, an upper die, a toggle having one. memberconnected, to the upper die, and its other member supported by an eccentric shaft, a power shaft, means connecting the power shaft land toggle and adapted to ex tend and break the latter twiceduring each eccentric shaftand power shaft 'andadapted toggle during each rotation of the power shaft, and an adjustable eccentric bearing forthe eccentric shaft, for the purpose described. i i

13. In a tile press, the combination upper a lower die, barsor rods attached to opposite sides of,the support for the lower die and extending upward above the upper die, an eccentric shaft mounted in,

bearings in said vbars, an eccentricbushing on said shaft,.a toggle having one member" embracing said shaft and bushing and jltS other, member connected to the upper die, a, power shaft, connections between the power shaft and toggle adapted to extend and tofrock the eccentricshaft between the suck cessive pressing. operations impartedto the100 break the toggle twice during each rotation of theshaft, means connecting the power shaft and said eccentric shaft and adapted to adjust the latterto varythe position of thejtoggle and upper die relative to the lower ,diebetween the snccessivepressing;

operations imparted to, the toggle during each rotation of the power shaft and means for adjusting the eccentric bushing, for the purpose described. f i

lower die, an upper die, a toggle having one member connected to the upper die and its 14. In a tile press, thecombination of a,

other memberconnected to bars or rods at tached to and extending upward from the support for the" lower die, a power shaft, means connecting the shaft and toggle and adapted to extend and break the toggle twice during each rotation of the shaft,

imeans for effecting simultaneous vertical v with oneiof the dies, means for extending movement of the two dies, at stop limiting downward"movement of the upper die, a stop for limiting downward movement of the lower die when the dies are separated between the two pressing operations obtained" during each rotation of the power shaft, and means for moving said stop to inoperative position at the completion of the second: of said pressing operations.

15. In a 13118 press, the combination of movement of" the upper die, a pivotally mounted stop adapted to be adjusted into position to limitdownward movement of the lower die whenthe dies are separated between the-two pressingoperations obtained during each rotation ofthe power shaft, and a cam rotatedby the power shaft for moving said stop intooperative position as described and returningit to inoperative position at' the completion of the second of said pressing operations.

16i l 'ira tile press, the combination of a lower die;- an'upper die, a toggle-having one member connected to the upper die and its other member "connected" to barsor rods attaohed to and extendingupward from the support) for the lower die, a' power shaft, means connecting the shaft and toggle and adapted-to extend anclbrcak the toggletwice duningeaclr rotation of the shaft, meansfor effecting simultaneous vertical movement of the two dies,- a stop limiting downward. movement" of the upper die, a pivotally mounted, longitudinally extensible, stop adapted tobe adjusted into position to limit downward movement of the lowerdie when the dies are separated betweenthe two pressbig-operations obtained during each rotation of the power shaft, and a cam rotated. bythe power shaft for moving said stopintooperative position as described and returning-it to inoperative-position at the completion of the second of said pressing operations.

175 In a tile press, the combination of upper and lower dies, a toggle connected and breaking the toggle to move the die connected therewith to and from pressing relation to the other die twice during each v adapt the press to cycle of operation, means for automatically effecting adjustment of the toggle between the successive pressing actions occurring duringeach cycle of operation to cause the dies to impart a relatively light compression to the material between them, relieve suchmaterial from pressure andthereafter impart a second and materially heavier compression to such material, and means adapted to vary the 1 relation of the toggle and connected die to the other die inaccordance with varia tions in the thickness of the chargeof material to be pressed.

18, 111 a tile press, the combination of upper andlower dies, a toggle connected with one of the dies, means for extending so and breaking the toggle to move the die con- 7 nected therewith to and from pressing relation to the other die twice during each cycle" of operation, meansfor automatically effect ing adjustment of theutoggle between the successive pressing actions occurring during each cycle of operation to cause the dies to impart a relatively light compression to the material between them, relieve such material fronr pressure and thereafter impart a second and materiallyheavier compression to such material, and means eccentrically adjustablefabout thestationary axis of the toggle-for varying the relation ofjthe tog gle' and connected die to the other die to operate on charges of different thickness.

19; In a tilapress, the combination of upper and lower diespan eccentrioshaft, a

toggle having one member fulcrumed about the eccentric portion fsaid shaft and its other member coiniected with oneofthel dies, means for; extending and breaking the toggle to compressa charge of material between the; dies twice during each cycle of operation, means for"automatically rocking the eccentricshaft between thesuccessive pressing actions occurring during each cycle of y, operation,. and independently adjustable means between" said shaft and toggle for varying' the relation of the toggle and the connected die to the other die in accordance with the thickness of thejtile to be producedi v v 20. In atile press, the combination of upper and lower dies,v an eccentric shaft, a toggle having one member fulcrumed about the eccentric portion of said shaft and its other member connected with one of the dies, means forextending andbreak- I ingthe toggle to "compress a charge of material between the dies twice during each cycle of operation, means for automatically rocking the eccentric shaft between thesuccessive pressing actions occurring twice 1 during'each cycle of operation, and an eccentric bushing arrangedbetweensaid shaft and the surrounding portions of the toggle between the dies, means for automatically rocking the eccentric shaft between successive pressing operations, and adjustable means for varying the intensity of the pressures exerted 'by the two successive pressing operations.

22. In a tile press, the combination of upper and lower dies, an eccentric shaft, a toggle having one member fulcrumed about the eccentric portion of said shaft and its other member connected with one of the dies, means for extending and breaking the toggle to compress a charge of material between the dies twice during each cycle of operation, and means for automatically rocking the eccentric shaft between the successive pressing actions occurring during each cycle of operation, including an adjustable member adapted to alter the relation between the eccentric shaft and toggle when the parts are at rest whereby the intensity of the pressures obtained by the successive pressing operations will be varied.

23. In a tile press, the combination of upper and lower dies, an eccentric shaft, a toggle having one member fulcrumed about the eccentric portion of said shaft and its other member connected with one of the dies, a power shaft, means connecting the power shaft and toggle and adapted to extend and break the latter twice in each rotation of the shaft, an arm attached to the eccentric shaft, and means connecting said arm and the power shaft, whereby the eccentric shaft will beadjusted to vary the position of the toggle and connected die relative to the other die between the successive pressing operations occurring during each revolution of the power shaft, said means including an adjustable member whereby the intensity of the pressures exerted by said pressing operations may be varied.

2%. In a tile press, the combination of a lower die, an upper die, a toggle for moving one of said dies toward and from the other, a power shaft, means connecting the shaft and toggle and adapted to extend and break the toggle twice during each rotation of the shaft, means for varying the relation of the toggle and die connected therewith to the other die in accordance with the thickness of the tile to be produced, and means for varying the relative intensity of the pressing actions.

25. In a tile press, the combination of upper and lower dies, an eccentric shaft, a toggle having one member fulcrumed about the eccentric portion of said shaft and its other member connected with one of the dies, means for extending and breaking the toggle to compress a charge of material between the dies twice during each cycle of operation, means for automatically rocking the eccentric shaft between the successive pressing operations occurring during each cycle of operation, adjustable means for varying the relative intensity of the pressures exerted by such successive operations, and an eccentric bushing arranged between the eccentric shaft and toggle and adjustable relative thereto to adapt the press to produce tile of different thickness.

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

FRANK B. YINGLING. Witnesses:

E. A. BELDEN, ETI-IEL KIMBROUGH.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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