US878470A - Machine for forming sand molds. - Google Patents

Description

PATENTED FEB. 4, 1908.

W. C. SWIFT. MACHINE FDR FORMING SAND MLLDS.

APPLICATION TILED JULY5.1908.

Wands 50o I UNITED STATES PATENT OFFICE.

WILLIS C.'BWI P"I, OF HINSDALE, ILQINOIS, ASSIGNOR T0 FRED HERBERT, OF BIRTLEY,

ENGLAND.

no. s1s,47o.

Specification of Letters Patent.

Patented Feb. 4, 1908.

Application filed July 6, 1906. Serial Io. 394.7.

Toall whom it may concern: Be it known that I, WrLus C. Swrrrpa citihave made a certain new and useful Invention in Machines for Forming Sand Molds, of which the following is a specifica ion.

' The invention relates to machines for forming sand molds. I

The ob'ect of the invention is to provide a construction of machine for form: sand molds and accessory parts therefor which are simple and etlicient in operation.

A further object of the invention is to (provide means for automatically lockir an re- .leasing the socket pattern employs in machines of this character.

A further object of the invention is to rovide means for automatically locki an releasing the spigot pattern employe in connection with the machine.

. Aiurther object of the invention is to provide means for. automatically centeringthe placing tube employed in connection-with machinea'of this class.-

- Otherob'ects of the inventio' will appear more fully ereinafter.

so hereinaftenset forth, as shown in the mom-- the appended claims. I

Referring to the accompanying drawing}- so is 'nvention consists substantially in the construction, combination, location and arrangement .of parts, all as will be more fully 'ngdrawingand finally-pointed out in Figure 1.is aview part in' elevation'and partly. in vertical central ongitudin'al section of amach'in'e for to -"sand' molds, constructed in accordance Wttil. and'embodying the principlesof my invention, andshowing the parts intheir initial position ready to start up' the operation for forming a mold. Fig. 2 is a view similar to Fig.1 theupper .partjohthe iiasl rv and .main'pattern being roken ofl, showing the parts in the positions occupied at the completion of the upward stroke of the moldforming mechanism. Fig; 2' is a broken view in section of the upper endl'of the flask and main pattern showmg: the manner of-mou'nting, connecting and discnnnectingtbespigot pattern. Fig. 3 18 a detail view in section of the automatic lock- .ingand releasing mechanism for the-spigot pattern.

' The sanic partisJdesi gnated by "he-same reference sign wherever lt-occurs.

' bestforms in which I at In the construction of machines for forming sand molds, it has been proposed to employ an hydraulic plun or or piston u on which is carried the mo d pattern, whicii is forced longitudinally through a suitably arranged flask contaming the sand or other composition employed or the mold, whereby such sand or'composition is pressed or acked into the desired shape within the ask to form the mold. In the operation of a machine of this nature, it is customary. to eni'loy auxiliary patterns for giving to the mo d the proper form to produce the desired shapes of the ends of pipe connections to be cast in the mold. Ordinarily the auxiliary patterns employed are called the socket Iii/- tern and the spigot pattern, 'one of w 'ch may also be so constructed as to form the gate for the introduction of the molten metal in forming the casting. Where auxiliary pytterns are employed it is desirable to provide means for automatically lockin the same in place, and for automatically re easing'them when their work has been accoi lished. In machines of this class it is'usua ly the practice to employ what may be termed a displaci tube, which is inserted into the flask preliminary to the beginningof the operation of forming a mold, and which, with the interior surface of the flask, formsa chamber or space 'to receive'thc sand or other compositionemployed. It is exceedingly desirable in the proper'and' accurate working of the machine to maintain the displacing tube in centered relation with respect to the flask, '0 as to avoid any inequaiities in the mold to he produced," a

It is among. the special purposes of my present-invention to provide means for' accomplis these various purposes and. I- will-now escribe constructions embodying the principles of m invention, as illustrative forms of ractica' constructions, and 'the present contemplate carrying out the 'princip es of my invention,

but to which my invention is not to be limit 1oedtorest (1 1t tube it then inserted thro is creme through a supfily pipe 6 iron: any convenrent source. y invention is not concerned with the construction of the e and piston as many other constructions and a arrangements for operat' the piston may be employed without ail'ectmg the operation of the features of my invention. Carried J the piston, and near the lower endth isasup 'riigflsngeL-upon which isadspt-.

to he a pattern 8. Preferably. the upper en of the. pattern is roundedyas indicated et' 9. At a suitable '7 point on the rounded portion ,of the up end of e pattern is formed a shoulder-l it upon w is receivedand supported the lowerendofa jtubell andafla'sk, w nandseem'edto 12 is suitabl so a supplemen tary ormsasupportorseattoreceive the end of the tube, whereby lacing tube is centered at its lower displacing tube to is a required to bepro lycentered, and I wi hereinafter descri means which I have devised for accomplishhing that result. The parts sofar dcscn in the specific vconstruction thereof, and in the details of 58 their arrangement, form no part of my presagzggg ent invention, andthe operation is as follows, the arts bei in the relative positions illustratm by full men in Fig. 1, with the piston and pattern occupying their loweree most positions, and "e socket pattern of pro r size. and relation being plaeedwitliin -ll8 iolding ring 15.- A flask 12 is plac d in position amLsuitably secured in place. .h'1;ll;e

or shoulder lo,

l \ipon the shoulder or seat 10 formed in the 11 end of the pattern. ciore lowering displacing tul e, however; the pmtonan pattern are raised sufliciently for the up r end of the pattern to tplxfject somew, at 70 above the upper edge of socket pattern, and is: enough above the top edge of the socket ttern to carry the curved portion of pattern entirely W 7 1e to the motive power emn m posi-' tion, the exarlor surface of the d" tn theexteriersurlaoe-oi theen lowermost position so ss-to .workfiif compressinfi and pond -or ot er composition which occupies the enla space formed b the exterior surface of such pattern and interior surface of 3'; :he Thlizresultlis h ormmg nmou crorange u nte lower end or the main patterh 8 'an which its loweris received rests shoulder or ii engages the of the socket pstte'rnfi f-when main'pattern is ring .work of formi advanced the uired distance through such and theres tcr the continued upward movement of the mam pattern also raises-the socket pattern into the position shown in Fig.

2, whereby it, is enabled to accomplish its As above in nested, it is one of the special purposes of my present invention to provide means for automatically locking the socket pattern in its raised position, or in the position shown in Fig. 2. The object of thus locking the socket pattern in this position is to positively retain the same in thatposition during the return stroke or mover'nentof the sin pattern which might otherwise by riction cause the socket pattern to return too soon to its lowermost position, whereby. the movement'of the main pattern 'might cause thesocket end of the mold or the sand or compositio compo the same to become broken or isintegra thereby spoiling the mold. However, by maintaining the socket pattern in its raise osition until the main attern has been an cientl withdrawn or owered, this danger or liabi ity of endan ering or destroy the socket mold is avoi ed. In the accomphshrnent of this result 1 provide a sliding lockin pin 18, arrange to slide radially throng the supplementary casing 13, and ring 15, thereof to reject under the socket pattern when the atter in its raised, position, thereby forming a locking stop for locking or holdi suchpattern in its raised position. While have s own only one of'the: locking pins it.is obvious that any desired number to accomplish the purpose may be employed. The inner end 0 the locking pin ..8, l8 preferably beveled on its lower side, as clearly shown at 19, to facilitate the passage of the socket pattern in its upward movement, without obstruction so far as said locking pin is conee As soon as the lower edge or base of the socket pattern has cleared the end of the locking in it isalesirable that said pin snap into lee relation thereunder.

- therefore emplpy means normally tending to yieldingly pro ect Q such construction and arrangement.

the in into the casing, and into engaged relatiion underneath the socket pattern. After the main pattern has been withdrawn and the socket attern is ready to bewithdrawn to its initia position, the locking in 18, must be withdrawn to permit the soc et pattern to be returned to its initial position; the withdrawal of.the lockingpin may be effected by hand or otherwise as may be desired. In practice I prefer; to employ means fora'utomptically withdrawing the locking pin, and in theaccomplishment of this objectI provide a const tion and arrangement which I will now 0- sribe, but to which I do not desire to be limited or restricted in the specific details of Inthe particular construction, shown I provide a the socket end of the i'nold.v

and have the inner end.

casing 20, in which the locking bolt or pin 18 is mounted to slide. Suitably pivoted in this casing is a bell crank lever 21, pivotally suportcd at its angle. One arm 22, of this ever is arranged to extend through a slot 23, formed in the pin or bolt 18. By rocking the bell crank lever 21 in one dir ction or the other, the locking bolt is shi d or moved endwisc. The arm 22 of the bell crank lever is preferably curved on the arc of a circle concentric with the pivotal axis of said lever, whereb when said lever is rocked the bolt 18' is shifted or moved endwise suiliciently to cause the inner end thereof to be withdrawn from supporting or locking relation with respect to the socket pattern while thereafter t e continued rocking movement of the bell crank lever will perform no work so far as the shifting movement of the locking bolt is concerned; A spring 24 is arrange to exert its tension upon the bell crank lever in a direction to rock the same in a direction -toroject the bolt into the casing or into loc ing relation with respect to the socket pattern.

employed to withdraw the socket attern to its initial osition is provided ,wit .an aux iliary rtion or connection 26, which is connecte to an arm of the bell crank lever-21. The length 9f this auxiliary connection of the chain from the point 27, where it joins the crank lever 21, is so regulated with reference to the length of that portion of the chain socket ring, as at 28,'as hat when the lower end of the chain is ull the first result is to cause the bell cran lever 21to rock, thereby effecting the automatic-withdrawal of the locking lpin or bolt 18, and this occurs before the pull -on the chain is e erted upon the socket ring, that rtion the chain indi cated at 29 exten i from the point 21% the point 28 being he d slack,- as indicatedjin the locking pin 18, is in its locking inch. The wei ht or other suitable form 0 stopQO, attache to the lower end of the chain 25, servesasameanstobeeng ed byaflange31, of the piston, as it approae es its lowermost position, whereby a' pull is exerted u n chain 25 in a direction'to cause-it .to t withdraw the locking pin ,or bolt 18, thro h the chain connection 26, and thereafter continued downward movement or ull on the chain effects the withdrawal of the ace ation'of this part of my invention is asjfollows, assum'uig the parts to be in'the positions shown in full lines in'Fig. l.' The piston I is raised slightly so as to carry the main pat- .tern 8, into the position shown in dotted lines,

duced into the upper end of the flask, and

One of the chains or othei connection 25,

which extends from the point 27', tothe point' of attachment of the end of the chain to ths' I Fig.2, by the tension of the'spring 24, when connection 25 to its attachment to the bell patterntoitslowermostposition. 'lhs oper- 'and the sand or other composition is intro- 2 with the' continued upw into the space between the flask and the dislacing tube. By-

the piston the ange 31, is raised so as to relieve the pull slackening these chainsor other con nections the springezt, isrmitted to exert its pressure upon ll cran lever 21, to'rock the same in a direction to constantlfio rest! 4 the inner end ofthe locking pin or it 18 1c inwardly, the inward movement of such locking pin or bolt being prevented by the en t thereof with the exterior surface -of the socket attern. Power is then applied to cause piston and main ttern to 18 rise longitudinally through the lies 12. As the main pattern and'piston proach the hunt of their-upward strohe the 17, on the-lower end of the m'ampattern e underneath the socket ttern, there tum movement of mam carrying upwarsly with it .until the'lower socket ttern c theiinner loc pin or bolt 18, whereupon the tension as of spring. beoome's etfective to project the inner end ofthelocking pin or b t inwardly andftmderneath the socket pattern, there positively docking the socket pattern in its raised position, and main the game so in such position until the main pattern and piston are withdrawn to their lowermost glitz, the socket tmttern thereby protect-' ofthe thatpdrticn of mold which forms tendof the eastingtobeprodueed. As

as the andpnton approach lowerm .ofthepiston sagas the etc or weight,30, tnereby carry,- same ownwsrdlyhowimch pigeon ont'c'oro r g fintefleotofthis downward l on-the chain or'eonnection 25, is to. rockofi crankle',v er 21 against the-tenfliewithr we] of the locking pin or bolt 18, from beneath. the lower edge of the socket tern. ,andwrththeeontinued q ow nwa'rd movement of the piston the stop or weight 30 is carri mg a {bull upon the so 'on- 29 of t chain or ot' rconnection 5, and hence positively withdrawing the socket pattern to, its lowermost position. If desired, the-lowermostposition of' the -s6c'ket pattern may ad ustebly regulated It hy-means of pins 3 ns'e holes formed in.:the ring 15, or, other sup: port, for the socketpattern. Having now described the construct on and operation of the mechanism for forming 'the socket pattern, I will next describe the means for automatically locking, releasing and raising the pattern which forms the spigot and gate of the mold. The spigot I pattern is designated generally by reference I sign 33, andis in the cm of anfig havmg 130s the chains or other connections 25. By

-the-socket=pat tern en t the,".The

their cient distance above the-up r .flask, said spiaoet pattern being i'ecel n curved ta -main pattern, may be 24, and m a direction to effect.

ed' still farther .down-' rted through stopits interior surface concaved or curved, to' correspond with and conform to the conical I or curved tap er end of the main pattern 8 and adapted to.receive such conical, taper mg or curved end of the main pattern and to be sup orted thereon, when the latter' emerges e vs the upper end of the flask. Thls'splgot pattern 33, is, when not required for use, and when in 'tion ready for application. to the end the main pattern, ,sustamed or supported over the upper end of the flask in any suitable or-convenient manner. I have shown a aim is and efiicient ment for accomplishingthis purpose, wherein suspending chains or other connecso trons 34, are connected to the spigot pattern, and after leading over suitable guide sheaves or have suspended'weights 35, attac thereto, forming counterbalancihg weights for Wi ding the spigot pattern. as designed an adapted to be supported 11 n suitable brackets 36. lacing ube 11 is to be d owem mm position upbn the sEoulder 10,

on th'emain pattern 8, as above explained, said tube freely through. the spigot pattern. KM! main attern has-completed its upward stroke by the displacing tube comp tel'yout of t a'sk, displ tube is-removed as or-mpported in any suite is manner onto!- the way. Tl 1e .spigot pattern is g m such petition as to receive the upper en of the main pattern, when it a)! 0 'ved and raised upo nng or conical surface of the end of the main pattern, as clearly shown. In order that the spigot pet-' tern, when received upon the end. of the 10s automatically locked. thereon, and automatically released from looking relationwith-respect thereto, andto ite'in itial suspended position,

I ve provided a very simple and eflicient 11o mechanism which {I will now describe although 1 do not desire it to be understood. that my ,inventiotis to be limited or restricted to theexact details of construction shown and described for performing these 116' operations. 1 i

In the peripheral surface of the curved or conical end of the main attern, 1 rovide a groove or seat 37. Suite 1 carrie by the spigot pattern is a sliding loc ing bolt or pm .120 38, connected to one arm of a bel crank lever 39, said lever being ivoted at ts angle, as at 40, and havin a s ecve 41, plvotally connected to the ct er arm of saidbell crank lever,,'said sleeve depending therefrom and extending through openings formed in flanges 42, of the socket pattern, and operating loosely thcrothrough, the. suspending ch. 'ns or other connections 34, are a attached to the same arm of the bell 'crank 4 a direction to hold the locking movementof the weight of the spigot .tmo.

crank lever-in a direction topl'o an th -.and the tension-of the sp pattern 8, is raised-into the such pattern is raised with th =A sprin 4a, interposed tame; a "he? or u mul er 44, formed on or earned by thoslocve 41, and the underside of the upper flange 42, of the spigot pattern norma ly exert: its tension upon said aloevqto force the same downwardly thereby roelnng the bell crank lever-39, in a direotionto move or project the locking pin or;bolt 88,,in one direction, namely, in a direction to enter the peripheral groove 37, in the end or the mam pattern at the proper point inth'e'o tron of 1 the device. The on weight 35, 43, are so rela tively pro ortioned that nthe socket pattern is ld in'suepension over the end the flask, the bell crank lever 39 is rocked in pin or -bolt 38, in withdrawn position. the weight 35, being slightl raised above its supporting bracket 36./ ow, when the upper end of the main r s P e upward move! We, g -eseem receiv u m bracket 30.. 'lheren'it'ei'-tii e MW q'be'impossd t suspendmgehannorother u i g 43, to come intqflayw g locking pinf 'orv lt38, into,ths 27, the endofithe by automatically locking n' to'- the mun,natt rn,, I-1,.- To facilitate themovement of the curved end ot.. the; ma!n patterns-past the inner on locwgendptthep n or bolt-88 ,u the end of t efiinain pattern. advanees the spigot pattern, said inner end d tho pm or hol t ia beveled on the underside thereoizas at 4..,In order topoeitivelyloolflthe locking, purer bolt :38 in looking relat on ,witlrres to peripheral groove 37, n the .end 0 ,the main ttern, I provide a shouldered .catch 40., writ he sleeve 41 and arrange the nose or shoulder 47, of aai latch to engage underneath. the flange 42-, when the sleeve 41 is moved downwardly-a distance sufficient forthe engaging 6nd of lockirg; holt or4pin 38, to entell'dthelgrgove .37. .a ring 8 eervee to. 'e the catcli 46 in a direction i ngy m: ehoulder. 47 thereof to snap 42; The lower end of catch 46.is beveled as indicated -at 49. 'A'rra'nged to slide within sleeve 4l' is a pin 50, having its upper end beveled as at 5l,-in opposite, relation with rcspc'ct to the beveled end 49, of the catch, at when pingfit), is moved upwardly through sleeve 41 the catch 4.6, ijs rocked in a. direction to withdraw-its shonlderor nose und r fla je'cted into locking relation 46 so a or the no.e or

4? r'rcn'i cugugiug relation with respect 'to flange 42, through the engagement ot'the cooperating beveled surface 49 and 51. After the spigot pattern is locked to the main pattern, as above explained, the piston and main pattern are reversed and be spigot gattern with them and towa upper ared end of the flask, thereby compressing the sand or other composition)- ween the exterior surface of the s got pattern, and the interior surface of the ange their downward stroke thereby carryin :he'

at the u per end of the flask, the exteriorsurface 0 the spigot pattern being so shaped the spigot and K gate in the mold. As soon as the spigot and formed as to produce gttern has completed its 'work, and in o avoid arresting the movement of the main ttern and pistonintheir downward stroke?" ving lose oftime and interru limb invo tion" 0 the operation of the machine, it desirable to pmvide'mealnafor automati tern and to permitthe "pattemfto h e returned to its or raised 'tionread for the next 0 r-' ation.

course, it be understood t at after-the pinor bolt 38, has been with respect the peripheral groove 'in the end-oi'the, mam

'unloekingthesplgo' t tternfromtheendof ment of-the main,pattern, a suflicient die p.

. a, v a tame fonthe; suspending torn, and after-the catch 46haa be 'f come oeked underneath the withthe m'ain ttem and do flange 42, downward movement of the 1 h.l'fi atageaolthe" Inward stroke 0 thel atter'w'.

a-pulLuponthe'huspen tar-ice nneetion'84,euflicient to 35, fromitabracket 88, but without eifec :a-withdrawalotthe loekin since thelatteria looked Brativelyin tip continues tolmove ownw with the flask, and thereafter to to be; ,41, theremngsging and releasing "pattern," In case t e pull of weight'35yis locking the lower end 'of sleeve 41 into e'n'ga rnjent with the flange 52,. of the'flaek; 't reby ping-no 'ectedupw within awelgevoe .Th e-inetant rthis catch-iereleashd' theipull of we1ght:35,,is suflicie'nt torock bell-crauklever 39 in a direction to withdraw lockhig no bolt or in 38 thereby automaticely' leasing t e .epigotattem hem-"the main" positively projecting the sleeve 41. upwardly,

and hence insuring 39, and the withdrawal of thelockirig permitting the suspension-weight 35,- to" I pin or" bolt 38, and come uently-- releaamg the spigot pattern iromt e main'pattermland' a rocking of hell cranlr no withdraw or elevate cruise the spigot patsocket pattern, insane for movi the same up to its work, and means for ocking the same in its working position.

' 2. In a machine of the class described, a' flask to receive the sand or other composition, a main pattern and means for moving:

the same through said flask, in combination with an auxiliary or socket pattern, means for moving the. same 11 i to its work, and means for automatically ocking the same in its raised position.

3. In a machine of the class described, a flask, a main pattern and means for moving the main pattern into and out of said flask in 5 combination with an auxiliary or socket pattern, means for moving the same up to its 4 work, means for locking the same in its wo position, and means for releasing said 100 means.

. 4. In a machine of the class described, a flaslrra main pattern and means for movin the same into and out of said flask, in combi-- nation with an auxiliary or socket pattern, means for locking the same in its working 'tion, and means for automatically roasing fsaidflockingmeans to permit said auxiliary pattern to e returned or socket to its imtial position. 5.'The combination with a flask and a main xpattern, and means .for moving said patte into and out of said flask, of an auxiliary or socket pattern through which said. main pattern operates, -means for moving said auxiliary or socket pattern into as ts -working position, and 0. sp 'ing pressed locking bolt or pin arranged to e age said auxiliary or socket pattern and ock the same in its working position.

6. The combination with a flask and a .main attern, and means for moving ,the latter into and out of said flask, of an auxiliary or socket pattern, throughwhich said. mam pattern operates, means for moving said auxiliary or socket pattern into its working position, a spring operated locking pin or bolt for'locking said auxiliary or socket pattern in working position, and means i or automatically releasing said locking pin or bolt to permit the withdrai'val of,the auxiliary or socket pattern.

7. The combination with a flask, a main pattern and means for moving the latter into and out of said'ilask, of a socket pattern,

through which said main pattern operates, means carried by said main pattern iorengaging the socket pattern to move the. latter into its working position, means for locking said socket )attern in its working position, and means ior automatically releasing said locking mechanism.

8. The combination with a flask, a main pattern and means for moving the latter into and out otsaid flask. of a socket pattern through which said main pattern operates.

65 means carried by the main pattern and arpattern, and means for movi ranged to engage the socket pattern to move the same into its working position, a locking in or bolt, an operating bell cran k.lever herefor, a spring operating upon said lever to normally PIOJGOt said in or bolt into locking enga ement with said socket pattern to maintain t e same in its workin position, and means for automatically roe mg said bell crank lever in opposition to said spring to release said locking-pin or bolt.

9. The combination with a flask, a main pattern and means for moving the latter into and put of said flask, of a socket pattern, through which said main pattern operates, means carried by said main pattern and arranged to engage said socket patttern and move the same into working ition, a looking pin or bolt for locking sai socket pattern in its working position means connected to said socket pattern and operated automatically .by the return of the main pattern to initial position for positively withdrawing said pattern from its working position and means connected with said withdrawing means and operating in advance of said withdrawing means-for automatically with- 1 drawing said locking pin or bolt.

10. The combination with -a flask, a main pattern and' means for moving'the latter into and out of said flask, of a spigot pattern, means for suspending the same in position to receive the end of said main pattern, and means for automatically locking the same upon said main pattern.

11. The combination with a flask, a main the latter into and out of said flask, of a spigot pattern, means for supporting the samein position to receive the end of said main pattern, means for locking saidspigot pattern to the main attern, and means for automatically roeasing said locking means.

12. The combination with a flask, a main 0 pattern and means for moving the latter into and out of said flask, of a spigot pattern,

means for supporting the same in position to receive the end of said main pattern, a' looking pin or bolt carried by one of thesis parts and arranged to engage the other whereby said parts are locked together. and means for puiomatieally releasing said locking pin or in t.

13. The combination with a flask, a main pattern and means for moving the latter into and out of said flask of a spigot pattern, means for supporting the same in position to be received on the endof said main pattern, a locking pin or bolt for locking said iarts together, a latch for locking said bo t in looking position, means for autonmtic-ally releasing said latch, and means for autoimitigally releasing said locking pin or bolt.

14. The combination with a flask, a main pattern and means for moving the tter into and out of said flaskof a spigot pattern,

means for an porting the same in position to be receive on the end of said mam pat-' tern, a lockin bolt carried by said spigot pattern and a apted to be moved into and to be receive rel 'tively'withdrawing said locking same in position to be receive out of engagement with the main pattern to lock said parts to ether, a bell crank lever for operating sai bolt, a counterbalance connected to said lever and tendin to rock the same in a direction to with raw-said bolt and a spring arranged to exert its tension in 0 position to sai counterbalance.

'l5.' ecombination with a flask, a main pattern d means for moving the latter into and out of said flask, of a spigot pattern, metrics for supporting'the same in position to pattem', a locking bolt carried by said spigot pattern, a bell crank lever, having one arm thereof connected to said bolt, a counterbalance connected to the other -arm of said. lever and normally tend to rock-said lever in a ireetion to withdraw said bolt, a sleeve also connected to said hell crank lever, a pring operating upon said sleeve to rock said ever in opposition to said counterbalance and an auxiliarycatch for locking said bolt in looking ition, and means for automatically releasing said auxiliary catch. .16. The combination with a flask, a main pattern, and means for moving the latter into and out of said flask, of a spigot pattern, means for splpportf the same in position upon t e end of said main pattern, a locking bolt, abell crank lever for operating the same, a suspending counterweight connected to said lever, a sleeve also. connected to said lever, a sprin: operating on said sleeveand in opposition to said counterweight, a catch carried b said sleeve and operating to automatically ock said bolt in locking position and means for automaticall said locki catch anld lfor posio t. 17. The combination with a flask, a main pattern, having a pensheral groove in the u per end thereof, an means for me e latter into and out of said flask, of a spigot pattern, .means for supgorti'ng thev d d f d upion the ve en o as; main attem an ca $9. locking pin or bolt Eda ted to be Fr?- jected into said groove'to ock. said drawing said. locking. bolt to release said parts.

pattern, and means fdr moving th latter ived uponthe end of and main.

v parts uof two subdcribing witnesses, on together, and means'for automaticallywith'ed 1 18. The combination with a flask) main into and out of said flask in OOIIflIXQtiOD.

avsmo with a displa tube, adapted to be received within sai flask and supported at one end upon said pattern and means within the flask for centering said tube with reference to said flask.

19. The combination with a flask, a pattern and means for moving the latter into and out of said flask of a displacing tube adapted to be received within flask and rest! and supported at one end by the end of sai pattern, and centeri arms within said tube and means or operating it same to engage the flask to center said tu with reference to said flask.

20. .The combination with a flask, a pattern having a peripheral shoulder near one end thereof, and means for moving said pattern into and out of said flask, of a displacing tube, a to he received within said flask and to rest at the lower end-thereof upon the shoulder upon the end of said pattern whereby the lower end of such tube is centered, and means arranged within the flask for centering the upper end of said tube within said flask. v

2].The combination with a'flaak, a pattern and means for moving the latter mto and out of said flask and restingat one end ugonthe endof such pattern, a 'da mounte within said tube adj acent t other end thereof, a sleeve operating upon said and arms pivotally connected at one end such siege, th'e endls1 of said arms "'5 ranged project t ug o inaai tube and toimpmge against t2: innsrsurfacs of said flask, whsubv said tube is centered at its upper end, and means formoving said eeve.-

' 22. The combination with; a flask, a pattern havinga rounded tapering or com .lcal upper'en and means for moving said pattern into and out of said flask, of a t pattern-having .a bors'conformmg' 'to pattern,

contourf 6f the-end ofsaid main means or an rtmg' t atternin position to mime the end s rid inain attem, means for automatically locking parts together and means for automatically releasing said ockingmeans. r In testimony whereof I have signed. my name 'to cation, intha resen 29:14: day ofJune, an. 906 WILLISC. sw-n 'r,

Witnesses:

'Ewn. H. Mums, S. E. Dansr.

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