US830199A - Casting-machine. - Google Patents

Description

PATENTED SEPT. 4, 1906 C. H. BIERBAUM.

CASTING MACHINE. APPLmATroN FILED DBO. e, 12oz.

3 SBEETSfSHBBTl N0. 830,199. PATENTED SEPT. 4, 1906' U. H BIERBAUM CASTING MACHINE. APPLIUATIOH FILED 13110.11, woz.

3 BHEETB*BHEBT 2.

PATBNTBD SEPT. 4, 1906.

G H BIERBAUM CASTING MACHINE. PPLIUATIoN FILED nwe, 1902.

a SHEETS-SHEET vertical longitudinal section of the E, and bottom section F.

i in position ready UNITED STATES PATENT orrron.

No. seo, 199.

Specification of Letters Patent.

Patented Sept. 4, 1908.

Application tiled December 6,1902. Serial No. 134,209.

To 117/, when@ t 11u14/ concern.' H. BIER- i nient.

Be it known that I, CHRISTOPHER BAUM, a citizen ofthe United at Buffalo, in the of New York, have invt nted new and useful l Improvements in Casting-Machines, of which l the following is a specification.

This invention relates more particularly to a machine for casting in a metal mold that class of metals and alloys in which the maxi- J mum shrinkage occurs at nearly the same i temperature at which solidification takes i place. i l The obj ect of this invention is to produce a machine whereby full and perfect castings of metal having this characteristic can be produced economically and expeditiously.

In the accompanying drawings consisting of three sheets, Figure 1 isa side elevation of my improved casi ing-1nachine, showing the same for making a casting. Fig. 2 1s a top plan View of the same. Fig. 3 is a machine, showing the mold and connecting parts tilted into the position for beginning casting. Fig. 4 is a vertical cross-section in line 4 4, Fig. 1. Fig. 5 is a perspective View of a flanged hallbearing or selnicylindrical lining for bearings which is east in the mold shown in the machine. Figs. 6 and 7 are vertical transverse sections, on an enlarged scale, in lines 6 6 and 7 7, Fig. 1, respectively, showing the osition of the mold at the beginning and en ing of the casting operation. Fig. 8

Statesesiding l county of Erie and State f connecting the plates near their front is a fragmentary vertical longitudinal section, on an enlarged scale, in line 8 8, Fig. 2.

Fig. Q is a horizontal longitudinal section in line 0 9, Fig. 2:3. A

Similar letters of reference indicate corresponding parts throughout the several Views.

As shown in Fig. 5, the halfsbearing easting, whi= h is produced in the mold in the ma.- thine, consists of a semicylindrical body or shell A, having n, peripheral flange a at one end. The mold is constructed wholly of metal and consists, essentially, of a diskshaped cover, falseilate, or rear section B, an inner semioylindlrical body-section C, an outer semicylindrie-.al body-section D, a. semicylindrical or crescent-shaped flange-section The parts of the mold areniovabl y supported in such manner that all of the same can be tilted, and all the parts exiepting the iront section B can be turned about the longitudinal axis ofthe mold and at an angle to the tilting move- G represents a supporting-head which is capable oi' turning in a vertical plane and which isrprovided at opposite ends with bearings la The front mold-section or cover B is rigidly secured to this head by an externally-screw-threaded boss h", arranged on the front bearing h and engaging with an internally-threaded opening formed centrally in the cover or face-plate, as shown in Fig. 3.

I represents a. main shaft journaled'lengthwise in the bearings of the supporting-head and projecting at its front end beyond the front bearing h. The bottom section of the mold preferably consists of two plates f f, arranged lengthwise side by side, a cross-piece ends, and a hub f2, connecting the rear ends of the pates. The hub of the bet-tom section is seu cured upon the front end of the shaft by a transverse pin f, andthe rear ends of its plates lit against the front of the face-plate or cover-section sufficiently close to form a tight joint between the same.

The inner body-section C rests at its longitudinal edges on the bottom plates f If, and its rear end bears against the face of t i section B. The inner section C is preferably held in engagement with the cover by a hasp c, hinged on the cross-bar of the bottom seetion and engaging with a pin de ending from the adjacent part of the inner god -section. In order to revent the inner bo y-section from being hfted from the bottom section, the latter is provided on the front ends of its hub and cross-bar with shoulders or seats, which are engaged by hooks or pins c on the under side of the inner body-section, as shown in Fig. 3. Upon disconnecting the hasp c and pin the inner body-section can be moved lengthwise on the bottom section for connecting or disconnecting the hooks c and seats ofthe same.

In order to permit of handling the inner body-section after the same has become heated by the molten metal, the same is rovided with a handle c2, which is connecte by a wooden shank with the front end of the inner body-section. The outer body-section D is arranged coneentrically with the inner section C and rests at its longitudinal ed esou the bottom plates, while its front en is provided with an internal flange d, which fits over the front part ofthe inner section. The

edges and engaging with corresponding openings in the bottoin section, as shown in Figs. 7 and 9. 'TheV outer body-section 1s also prcvented from being lifted from the bottom the and inner bod 9V-sections by two hssps ([2, hinged on the ront end ofthe -bottom section and engaging over pins at the front end of the outer body-section. For the pur V)ose reventin outer body-section flrom Stic 'ng to t e 'casting and permitting the same'to be readily detached this section is divided lengthwise -into two parts d" da. These parts are connected on their outer side b two elastic bowaiir arches j j, of metal, lch are suicently rigid to hold the parts normally `in position, but permit the saine to yield when ex anded by the heat of the metal poured into t e mold. l j represents transverse dowel-pins arranged in one part of the outer body-section and engaging with corresponding sockets in they companion part `for maintaining' the same in alnement. The outer body-section is manipulated by. means of two rips or handles j, of wood, which connect t 1e outer parts of the arches For the purpose of increasing the radiation of the outer body-section and hasten the cooling of the casting each art of the section is provided with a plm-a ity of transverse ribs ja.

fEhe flange-section E of the mold consists of a, peripheral flange e and a radial flange e', projec inwardly from the front edge of the erp eral flange. The o posite ends of gnge-section rest on thelbottoin plates, While the rear edge of its peripheral lian e bears a ainst the face of the cover and t e inner edge of its radial flan e bears against the rear edge of the outer body-section, as shown in Fi 6 and 8. Longitudinal dislaoement o the {lange-section is prevented E dowel-pins k, arran ed at opposite ends o the Hangs-section an enga ing with open ings in the b'ottom section. he Harige-see- `tion is detachably connected with the bottoni section by hasps l, hinged on opposite sides of the bottom section and engaging with pins on the Hangs-section, as shown in Figs. 1, 2, and 6.

f In order to prevent the flange-section from adhering to the casting and enable the saine to lbe removed from the saine, this section is divided axiallyjnto two parts l' l', which are yieldingly connected by a strap m of elastic metal-applied transversel to the outer side thereof. An elastic'hani le m' is also conuected with the parts of the flange-section for manipulating the same.

When the several parts of the mold are assembled, the inner and outer body-sections, together with the bottom lates, form the cavity in which the semicy indrical body A.

of the limi-bearing is cust, whilc thc llungcsection and cover-scclion form that purt ol the mold-cavity in which thc llungc a ol' lhc Indi-bearing is cast.

For the purpose ol ci|uulizing thc coolingr of the metal in thc mold and compcnsnting for any variation in thickness or pcculinrity in tbc form of thc casting and also l'or hm'- dcning the same wbcrc necessary thc lnold is constructed so as to produce a diilcrcnlial chilling eii'oct on thc casting according to the speciiic conditions.

n ln the half-bearing cestino which is pro duced in the mold shown in the drawings the metal of the flange 1/ is thicker than thc body A. For causing this casting to cool uniforinly the cover, the bottom, and thc outcr body-sections are made of iron, thc inncr body-section is composed of a metal alloy containing co per and zine, and the ilangcsection is ma( e of substantially pnrc copper. Owing to the fact that pure copper has a greater chilling eilcct than a topper alloy, the' flange section of the mold exerts a grcntcr chilling effect on the thick flange of thc casting than that efl'ected by the inner body-sew tion ol' the mold on the thin body in the custin whereby the casting is. chilled practically uniform throuuhout. By constructing the mold so that tie chilling cilect of the saine on the casting varies according to the variation in the thickness of thecastinff a casting of this kind can bc nroduced whic is practically free from shrin age strains, and consequently not weakened or cracked so as to be unservieeable. inasmuch as the coper alloy composing the inner body-section las a greater chilling cii'ect than the outcr body-section of cust-iron the inner sidc of the casting is hardened, thereby rendering the saine more durable as a bearing.

The different iarts of the metal mold do not diffuse or radiate the heat as fast as it is abstracted from thc casting. Each purl ol' the mold is therefore made of such it thickness that it will absorb nl] thc heat which it abstracts from the casting andcool the hilter suliiciently without depending u )on am* radiation ol heat from the mold. hc diient parts of thc `mold are rcprcsentedin s, drawings of a thickness sullicient for thisl piiriose. lf the parts of the mold wercfnot made thick cnoug i to absorb thc bulk oll the heat of thc castingl shrinkage strains would develop before thc casting is cooled.

rl`l1e molten metal For producing the casting is fedinto thc mold-cavity through a gate or inlet-passage n, which is formed in the cover-section on one side oi its center. The molten metal supplicd from a Atank or reservoir N, which is mounted on the supporting-hcad G in rear of the cover B. This rcservoir is preferably constrictcd of an outer body n', of iron, and an inner insulating-linnig n2, of asbestos `or similar iireprool matc- ICO lIO

rial, which lining preferably extends through l steady motion and also for obtaining thc rcothc gate or outlet-opening in the mold-cover B. The metal holly of the reservoir has the required strength io support the molten metal7 and the asbestos lining protects the reservoir-body from the destructivo action of thc molten metal. 'llie latter is also protected from thc chilling e'li'ect of the mctai reservoir-body, thereby maintaining thc metal in a `molten condition during the time that the same is being poured into thc mold.

:Upon filling the mold all parts of the same excepting the cover are turned about the axis of the mold, so that the level of the molten metal in the mold is always in line with the gate7 and the` mold is also gradually tilted, so that the end opposite the gate descends during the filling operation. By thus moving the mold the metal enters the same without any free fall, thereby preventing the interlningling of the molten metal with the air, and consequently reducing oxidation to a minimum, and that part of the mold remote from the gate is also filled in advance of the part near the gatel whereby full and perfect castinvs are produced. As the mold is turned the rear edges of the bottom plates and the flange-section are 'firmly held in contact with the face of the cover by a spring o. This spring is mounted on the main shaft and bears at its front and rear ends7 respectively, against the front bearing i and an adjustingsleeve o. The latter .has a screw connection with a shell o2, secured to the shaft. By turning the adjusting-sleeve forward or backward the tension of the spring o may be adjusted for holding the rotary parts of the mold against the cover suliiciently firm to produce a tight joint between these parts and prevent the escape of any molten metal between thc same. This sprin also forms a yielding connection between t ie rotary parts of the mold and the disk, which permits the parts to expand lengthwise under the effects of the heat of thc molten metal, thereby preventing cramping and interference. with the free movement of the rotary parts of the mold with reference to the non-rotary cover. The mechanism whereby the compound rotary and tilting` movement is imparted to the mold is constructed as follows:

l" represents a pedestal or standard, and Q a saddle mounted on top of the pedestal. This saddle is provided with an upwardlyirojccting arm o, to which the supportingiead is pivotally connected on its under si( c by a horizontal pivot-bolt q. Upon this pivot the supporting-head and the mold are turned in a vertical plane for tilting the mold as the iilling of-the same pro resscs. At the rear end of the main shaft tic same is provided `with a hand-wheel R, whereb f the shaft and the rotary parts of the mol( may be turned quickly. For the purpose of enabling the mold to be turned with a slow uisitc power to overcome thc friction ol' the molten metal against' the cover a worm-grax'- ing is provided, of which thc worm-wheel s is secured to the main shaft between thc hand- Whccl Vli and its rcar bearing h', and the worm. s is movable vertically into and out ol' cngagement from thc nndcr sidc of the worm- Wheel. The worm is `secured to the inner end of a short transverse shaft s, which is provided at its outer end with a hand-crank s3 for turning the same. Between the worm and crank the transverse shalt is journaled in a bearing t on the rear arm of a rock-lever T, which latter is pivoted by a screw t on thc side of the slqaporting-head, so as to turn in a vertical plane. The front arln of the worincarrying lever moves in a guide t2 on the supporting-head.

U represents a s )ring whereby the lever T is turned in the direction for engaging the worm with the worm-wheel. Thls spring is preferably connected with the front arm of the worm-supporting lever and the supporting-head, as shown in Figs. 1, 2, and 3. c represents a depending iinger secured to the front arm of the worm-supperting lever and adapted to engage a stop 'u' on the saddle for disengaging the worm f rom -the worm-wheel.

While the mold is arranged in a horizontal position, or nearly so, the worm is disengaged from the worm-wheel, as shown in F ig. l, whereby the shaft can be turned quickly by means of the hand-wheel for bringing the rotary parts of the mold into the desired position. Upon tilting the mold preparatory to pouring the molten metal into the same the worm-carrying lever moves away from the stop if, which permits the spring o to shift the lever for carrying the worin into mesh with the worm-wheel, as shown in Fig. 23. While the parts are in this position the mold may be turned slowly through the medium of the worm and worm-wheel for moving the front end of the mold-cavity past the gate in the cover. V

The mold is moved quickly from its horizontal inoperative position into a snilicientlyinclined position to cause the metal to flow freely from the reservoir into the mold, and thereafter the increasing tilting movement oi' the mold is continued slowly and in the same measure as the filling of the mold proceeds. The tilting movement of the mold after the pouring of the metal into the same begins is preferably eilected automatically by mechanism' which is connected with the moldturning mechanism. The means for this purpose shown in the drawings consists, es-

lsentially, of a crank w, arranged at the rear end of the main shaft, a rock-arm X., pivoted at its front end on a hanger al, depending from the rear side of the saddle, a lilik Y,

connecting the rear end of the rock-arm X with thc crank w. and a stop device Z, which IOO IXO

ISO

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limits thgl movement of the rockairni X. The link is preferably constructed in the forni ol a turnbuckle, so that the same may bc adjust ed. A. handle y is attached to the link for' convenience in shitting the mold quickly from its inoperative position to the position in which the .filling of thel ihold begins and again restoring the same into its'inoperative position. The stop device consists7 preferably, of a guide-rod e, pivoted at its upper end on the saddle, while its lower end passes through u, swivel z on the rock-arrn and screw-nuts 22 z3, arranged on the rod above and below the swivel. The mold is preferably counterbalanced by a weight rr', attached to the rock-arm.

Preparatory to commencing thc casting o eration the mold and connecting parts are s lifted into the horizontal position shown in Fig. l, and the mold is turned so that the gate of the reservoir opens into the bottom art of the mold at one side thereof, as shown ni Fig. 6. In this osition of the parts the worm is disengagc from the worm-wheel, the crank w is in its uppermost position, and the rock-arm X rests 1n its lowermost position on the lower nuts Z of the guide-rod. While the parts are in this position, a charge of molten metal is delivered `into the reservoir, and then the latter, together with the mold andconnecting parts, is tilted q uickly into the position shown in Fig. 3,-inwh1ch the metalV flows freely from the reservoir into tbe mold the extent of this quick movement being limited by the upper screw-nuts a, which are engaged y the swivel of the rook-arm X. As the parts are tilted into tnis position the Worf is ,moved into engagement with the worm-wheel. U )on now turning `the crank sain the pro er irection the mold is slowly turnedione alf-rotation from the position shown in Fig. 6to the position shown in Fig. 7, whereby the mold cavityis moved the entire extent of its rear end past the filling-gate, and the metal is poured successively into all parts of the mold. The movement of the parts is suiiiciently slow that the gate alwa s remains substantially on a leve with t e metal in the mold, whereby the `metal is prevented from falling freely in passing from the gate into the mold-cavity. At the same time that the mold is being turned it is further tilted, so that its front end descends until the axis of the mold is arranged at an angle, (indicated `by the broken lines I I, Fig. 3,) whereby the front art ofthe mold which is remote from the ii ling ate, is filled in advance of the rear part o the mold which is nearer the gate, and the unfilled part of the mold-cavity always Heres toward the fillingate, thereby affording a free inlet of metal into the mold until the same is entirely filled, )ermitting of producing a casting which is lull and peifect. This' automatic tilting of the mold is effected by the crank w, which l a depending position wlnlv the link is heh the attendent in its uppermost position causes the mold to be tilted an extent equal to the length of the crank w in addition to the initial tilt, which is given the mold preparatory to commencing pouring of the metal. The upper end of the link Y is preferably connected with the crank w b a bolt and slot y', as shown in Fig. 4, whic l. permits the throw of this crank to be'varied, as may be required. A fter the casting is finished the parts alle returned to their normal osition, wherebyithe worm is disengaged `om the worm-wheel, permitting the mold to be upon making a half-turn is' nl its standing to bv turned uicklyb means of the hand-wheel,

so that t 1e outer oily-section and the flange section of the mold are uppermost, as shown in Fig. 1. The casting is now removed from the mold by detaching the Harige-section and inner and outer body-sections from the bot tom section. These parts after being cooled, if required, are replaced on the bottom section of the mold preparatory to making the next casting.

The outer body-section has a tendency to stick to the finished casting' and rmust be forcibly removed therefrom. For permitting this to be donereadly a lifting-screw f is arranged in an opening in the bottom platev underneath one side of" the outer bodys'ection. Upon tightening this screw after the castin is finished the outer body-section is lifted om the castingpermitting the latter to be subsequently removed from the bottom section and inner body-section, A

I do -not wish to claim in this application the method which is practiced in making castings, as herein described, as 4the same forms the subject of another application-for Letters Patent of the United States., filed by me February 27, 190,2, Serial No. 95,856.

I claim as my invention- 1. A mold foncastin an article ofvarying thickness, said mold sing constructed entirely of metal and each part thereof having a heat-absorbi capacity corresponding to the thickness o `the metal to be cast in the res active partrof the mold-cavity, substantia y as set forth.

2.* vmetal-mold for producing a casting havin a semicylind'rioail .body and a segmenta flange at one end of theibody, those parts of the mold forming the outer side and the longitudinal edges o the body and the outer side of the flange being constructed of iron, that part forming the inner side of the body being constructed of an alloy containing copper and eine, and that part forming the inner side and icriphery of th'e fla e be- ICO ing constructed o copper, substantia ly' as cylindrical section, an outer semicylindrical section, a tlange arranged on one of said semioylindrieal sections and closing one end of the space between said sections, a cover elosin t e opposite end of the space between said sections, and a bottom section closing the space between the longitudinal edges of said sections, substantially as set forth.

4. A mold for producing a casting of semieylindrieal todo, having an inner semieylin drieal section, an outer selnicylindrical seetion arranged concentric with the inner seetion and provided with an internal flange closing the space between one end of the inner and outer sections, a cover closing the space between the opposite ends of the inner and outer sections, and a bottom section closing the space between the longitudinal edges of the inner and'outer sections, substantially as set lforth.

5. A mold for producing a casting having a semicylindrical body and a peripheral flange at one end, consisting of an inner seinicylindrieal section, an outer semieylindrical section arran ed eoneentrically with the inner section and having an internal flange at one endwhich engages with the eorrespondin end of the inner section, a crescent-shape flange section consisting of a peripheral flange and a radial flange engaging the opposite edge of said outer'section, a bottom section engaging with th longitudinal edges of the inner and outer sections and the ends of the flange-seetion, and a cover engaging with said peripheral flange and the corresponding ends of the inner and bottoni sections, sul)- stantially as set forth.

6. A mold for producing a casting having a seinicylindrical body and a peripheral Harige at one end of the body, consisting of an inner seinic lindrical section, a divided outer semieylinr rical section arranged coneentrieally with the inner section and forming with the latter the mold-cavity in which said body is east, an elastic connection between the parts of the divided outer section, a divided flangesection forming the mold-cavity in which said :lange is east, and an elastic connection bi-xn con the parts of thc divided flange-scction, substantially ns set forth.

7. A mold for producing n casting having a scinicylindrical body and a peripheral flange at one end of tlnl bod consisting of a bottoni section, inner undyoutcr scinioylindrical body-sert ions dctachably connected with the bottoni section, a flange-section engaging with the outcr body-section and the bottoni section and detachably connoctcd with the latter, and a covcr engaging with thc flangescction, the inncr body-section and thc bottoni scction,substantially as set forth.

8: A sectional inold having onc part rotatable relatively to thi` other, and a spring operating to draw snid )arts together in the dirci-tion of the a.\ s of rotation, substantially as sct forth.

9. A sectional mold having a body provided with a semieylindrical mold-cavity, and a cover engaging one end of said bodv and forming part of the inner or casting surface of the rnold and provided with a gate through which the metal is oured into the mold-caw it one of said ino d members being rotateble relatively to the other for bringing the gate opposite different parts of said cavity, substantially as set forth.

10. A sectional mold having a body provided with a semicylindricnl inold-cavitv and a cover arranged at the lilling end of said cavity and provided with a gate, said body being rotatable with reference to said cover for moving the filling end of its cavity past said gate, substantially as set forth.

l1. The combination of a support7 a mold- `body pivoted on said support, and a cover for closing the mold-cavity in the body, said cover being secured to said support and provided with a gate leading into said cavity and said body being rotatabh` relatively to thc cover for bringing different parts of its cavity opposite said gate, substantially as set` forth.

l2. The combination of a support, a shaft journaled in the support, it mold-body secured to the shaft, and a cover closing the cavity in said body and provided with a gate leading into said cavity, said body boing rotatable relatively to the cover for bringing different parts of its cavity opposite said gate, substantially as set forth.

13. The combination of a support, a shaft journaled in the supiort, a mold-body secured to one end of t; e shaft, n hand-wheel secured to the opposite end of thc shaft, and a cover for closing the cavity in the moldbody, said cover being secured to said support and provided with a gato lending into said cavity and said body being rotatable rclatively to thi` eovcr for bringing different parts of its cavity opposite said gate, substantially as set forth.

14. The combination of a support, n moldbody pivoted on the support, a cover for closing thc cavity in said .body secured to said support and providcd with a gato leading to said cavity, and a worin-gearing ,for rotating said mold-body relatively to th(l cover for bringing different parts of its cavity opposite said gat-o, substantially ns set forth.

l5. 'lhc combination of a support, a shaft journnlcd in said support, a mold-body scoured to said shaft, a cover for closing thc cavity in thc mold-boilsl secured to said support and provided with a gntc lending into said cavity. :i s ring interposed between said support und n shove on thc shnft for drawing thc mold-body against said rover, u hundwhcrl for turning the shaft quickly, und a worin-gearing for turning thc shaft slowly, substantially ns scf forth.

ifi. 'lhc combination of a lnold comprising a body having a luold-cniityv und u covcr IOO r tilting the :a pivoted horizontally on said 4o pivot sediee having a filling-gate opening into said cavity, l lhrougha swivel on said arm, and screw-.nuls

means for tilting the body and cover together in one direction, and means for turning the body 1n another direction relatively to the 5 cover for bringing different parts of the cavity opposite the gate, substantially as set forth.

17. The combination of a support7 a head pivoted horizontally on said support, a moldro odypivoted on sald head at an anvlc to the pivot etween th'e support and head1 and .1rovided witha mold-cavity, a cover fixed on said head and having a gate openin v into said mold-cavity, and means for simu tancously lead on said support and turning the body relativel different parts o 'its icavity opposite said gate,-substantially as set forth.

18. The combination of a support, a head support, a shaft )ournaled in said hcad at ri ht angles to the piyot connecting said ,hea and support, a

mold mounted on said shaft a crankconnect- @ed with said shaft, anda linlr connecting said crank with a normally stationary part on as set forth.

said su ort substantiall 'Ffi i f, a support, a head 19. e combination o ivoted horizontally on said support, a shaft.

Journaled in said head at ri ht angles to the 3o pivot connecting said hea .and sup ort, a

moldmounted on said shaft, a cran connected with said shaft, an arm pivoted on said support, a linlt'connecting said crank and arm, and a stop devicefor limiting the movement of saidarrn, substantially as set forth.

20. The combination of, support, a head ivoted horizontally on said support, a shaft )ournaled in said head at ri ht angles to the connecting said haar? and support, a mold mounted on said shaft, a crank connected with said shaft, an arm pivoted on said support, a link connecting said crank and arm, and a stop device for said arm consisting of a rod pivoted on said support and passing to the cover for bringing arran ed on said rod on opposite sides of the swive substantially as set forth.

21. The combination of a support,`a head )ivoted horizontally on said su port. a shaft journaled on said head a moldimounted on the shaft, a worm-wheel secured to the shaft, a bearing movably mounted on said head and carrying a worm, and 'means for engaging said worin with and disengaging the same from the worm-wheel, substantially as set forth.

22. The combination of asupport, a head `iivoted horizontally on the su port, a shaft .Journaled on said head, s mol mounted on the shaft, a worm-wheel secured to said shaft, a rock-levermounted on said head, a worm journaled on said lever and rovided with a crank, a stop for turning sai lever in one direction upon depressing said head, wheieby the worm is disengaged from said worm-wheel, and a spring f turnin said le- Ver in the opposite direction upon raising the head, whereby the Worm is engaged with said worm-wheel, .substantially as set 'forth 23. The combination of a mold, a fillinggate for the same, means for simultaneous y tilting the mold and gate, and'` means for moving the mold and gate one relatively to the other While being tilted, substantially as set forth. i

V24. The combination of amold,` a iillin gate for the same, means for simultaneouslgy tilting the mold and gate, means for moving the m'oldand ate one relatively to the other while being ti ted, and means for yieldingly drawing the mold and gate together,-si1bstan tiall as set forth.

itness my hand this 24th day of November, 1902.

CHRISTOPHER li. Blllltliilllll.`

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