US1874721A - Line casting machine - Google Patents

Description

Aug. 30, 1932.

LE ROY W. WILLIS LINE CASTING MACHINE 2 sheets-sheen Filed Sept. v25.. 1929 Aug.`30, l932- LE ROY w. w|| |..-|-s

LINE CASTNG' MACHINE 2 Shets-Sheet Filed sept. 25, 1929 ATTORNEY Patented Aug. 30, 1932 j UNITED STATES LE ROY W. WILLIS, F BROOKLYN, YORK1 ASSIGNOR '10v INTERTYPE CORPORA- PATENT OFFICE TION, OF NEW YORK, N. Y., .A CORPORATION OF NEW YORK LINE. CASTING, MACHINE i Application lved September 23,` 19,29, Serial No."394,160 4, andinGei-'many' October 13, 1928.

- forms generally'known and produced by machines of the class shown and described' in U. S. Letters Patent No. 436,532 granted Sep-- tember 16, 1890 to Mergenthaler, the inven-y tion providing a type bar casting mechanism` which forms a unit which is complete in itself and may cast type ybars or slugs from matrix lines composed by hand or otherwise or it may form a unitary part of or be used as a casting unit in conjunction with a matrix composing and line casting machine of the general class shown in said patent, matrix`-com posing and type casting machinesl of that class las now generally known and used being capable of modification to embody or operate in conjunction with the improved casting mechanism p-rovided by the present invention.

Line casting machines as heretofore known and used generally employ ametal pot having a well for the molten type metal and a throat leading upwardly therefrom to a mouth-piece for injecting metal into a mold which is positioned opposite to a line of character bearing matrices, the throat becoming wider as it approaches the mold-engaging mouth-piece until its width about equals the length'of the longest type bar capable of being cast in the machine, the entire metal pot being moved to and from casting position relatively to the mold preceding and following each casting4 operat-ion, but such casting mechanism as heretofore used is objectionable since a very considerable volume of air is always present in the metal pot throat above the level of the metal therein, and the presence ,of such air often seriously impairs the quality and solidity of the type slugs as such air cannot be entirely Avented from the mold during the metal injecting operation and consequently the presence' of such volume of air results in the casting of spongy slugs or slugs'containing voids or air holes which roduce imperfections in the type face of t e slug and weaken the slug. Moreover, such casting mechanism as heretoforeused .requires cumbersome levers and relatively slow moving 'cams for bringing lthe metal pot into casting position against ythe mold and for retraeting it, thus'entailing a'` relatively slow operation 'of theca'sting mechanism which restricted the output thereof. l 'Many-attempts have been made tol reduce the volume of air in the metal pot` throat materially the most common practice'being to provide metalv feeding. devices for automatically feeding fresh metal to the metal pot to maintain the molten `metal therein, and consequently in the metal pot throat, at a predetermined level, but such automatic metal feeding devices are objectionable since they are not only expensive and are only partially effective for the purpose, but they present the disadvantage that they add excessive weight to the metal pot thus limiting the speed at which the casting mechanism may operate.

"above the level ofthemolten'metal therein,

metal feeding devices, thereby enabling .more perfect and solid type bars tov be cast rapidly and with facility.

Another object of the invention is toprovide an improved t pe bar casting mechanism wherein the vol the metal-injecting throat isv further mini- 'mized by the provision of a plurality of independently operable metal-injecting pumps each having a metal-injecting mou th individual thereto, such lpumps being capable of operation either individually or in multiple, as may be required according to the length of the type barto be cast.

Another object of the invention is toprourne of air contained in K iml vide a' novel and improved casting mechanism of this class wherein the metal potand its actuating means are so constructed and arranged' that the movements of the metal pot to andffrom casting position are very short and direct so that the speed of operation ofthe castingy mechanism may be greatly increased over that possible with 'casting' lIl) mechanisms of this general class as heretofore constructed, thereby enabling a substantially increased output of type bars to be attained.

A further object of the Yinvention is to provide a novel and improved casting mechanism of this class embodying a metal pot and its metal-injecting and actuating mechanismv which comprises a unit complete lin itself and may be either coupled to the usual matrix composin machine of the general class shown and escribed in said patent in which matrices are delivered from a maga zine and assembled in a line for casting therefrom by operationof a keyboard after which,

the matrices forming the line are returned to the magazine, or it m'a be 'used' alone merely as a type bar casting machine for casting type bars from matrix lines composed by hand and placed in casting position manually.

To these and other ends, the invention 'consists in certain improvements and combination and arrangements of parts all as will be hereinafter more fully described, the features of novelty being pointed out particularly in the claims at the end of the specification. v

In the accompanying drawings Fig. 1 is a side elevation, partly in section, of atype bar casting mechanism constructed in accordance with the present invention;

, Fig. 2 represents a top plan view, partly in section, of the casting mechanism7 shown in Fig. 1, the metal pot cover being removed;

Fig. 3 represents a verticalsection through the upper portion of the casting mechanism, taken onthe line 3-3 of Fig. 2;

Fig. 4 represents a vertical section taken onthe line 4-4 of Fig. 2; and- Fig. 5 represents a vertical sction takenv on'the line 5-5 of Fig.l 2. Y

Similar parts are designated by the same reference characters in the several views.

The metal pot forming part of the casting mechanism' provided by the present invention comprises lwer and upper sections 1 and v2 respectively, the lower pot section 1 being stationary and contained within ajacket 3 l. which is mounted or rigidly secured on the stationary base 4 of the machine, and the upper pot section 2, which may be 'termed the casting pot, is contained within a jacket 5 which is movably supported above the acket 3 by links 6 which are parallel and preferably arranged in pairs at opposite sldes of fthe pot, the lower ends of the links at one side of the pot being pivotally supported on '66 pivots 7, which are fixed on the respective sides of the lower stationary jacket 3 and the upper ends of the links at each side of the pot engaging pivot pins 8 which are fixed on the opposite sides of the upper 'movable pot l. jacket 5, these links providing a parallel motion connection between the upper pot section 2 and its jacket 5 and the lower pot section 1 and its jacket 3, so that the upper pot sectionand its jacket may move substantially horizontally above the lower pot section. The lower stationary pot section 1 is supported within the jacket 3 by a number of lugs 9 which are located at suitable points around its upper edge' and rest on the upper portion ofthe jacket 3, a suitable space being provided between the lower pot section 1 and the jacket 3 for the flow of the heated products of combustion from a ga's burner 10 which may be placed within the jacket 3 and beneath the'- bottom of thelower pot section, although it will be understood that electric heating coils may be substituted for the vgas burner when such is desired. The jacket 3 is off-setat one side andthe respective side of the lower pot section 1 is correspondingly off-set to form a feed mouth 11 into which pigs of type metal may be thrown for melting in the lower pot section and this olf-set portion of the lower pot section also provides a space 1n which a metal feed pump well 12 is formed.

Ther upper pot section 2 is supported in the upper jacket 5 by lugs 13 which project from sides of the upper pot section and rest in recesses 14 formed in the sides of the jacket 45, the upper pot section being spaced from the jacket 5 so as to provide a space around it for the circulation of heat or products of combustion which enter the jacket 5 from the lowerl jacket 3, and on top of the jacket 3 is provided a cover 15 which fits upon its upper edge and is provided with lugs 16 which enter the recesses 14 in the jacket 5 whereby the top cover is held in, proper position on the jacket 5 when placed thereon. Preferably, the up per pot section 2 and jacket 5 conform in horizontal outline with that of thev lower pot section 1 and jacket 3, except for the feed mouth 11 in the lower pot section and the corresponding oifset in each side of the lower jacket, so that heat supplied to the lower pot I also heats the upper pot section, and in order to maintain a predetermined or uniform casting temperature of the type metal ,in the upper pot section 2 if found necessary or desirable, heating coils 17 may be applied to the bottom of the pot section 2 and retained in working. relation therewith by angle virons or cleats 18, these heating coils serving to supply heat to the shallow casting pot section 2 in Z addition to that received therefrom from the burner or other heating means below the lower pot section.

The casting `ot 2, which is preferably in tion 2 by the flange shown, these mouth. 'pieces being arranged in a. row, one besidethe other so that they will aline with the type bar or slug casting cavity in a mold 21 w ich may be carried on the usual rotatable mold wheel 22, the mold being positioned opposite to the line of composed matrices vM aginst which the type bar orslug is to be cast. It will vbe understood that the mouth pieces 20 of the pump extend forwardly from the pot section 2 through openings in the front wall of the jacket 5 in order that the faces of these mouth pieces may come against and form metal-tight joints with the adjacent side of the mold when the upper pot section 2 and its jacket 5 are moved forwardly into casting position.

Each of the metal-injecting pumps 19 comprises a cylindricalC tube the forward end of which is tapered to fit into the correspondingly tapered rear end of the respective mouth-piece 20 to form a metal-tight joint therewith, the upper half of the rear portion of the tube being removed or cut away to provide an opening through which the pump plunger 23 may be inserted and removed, the rear end of the pump cylinder resting in a semi-circular recess 24 formed in the upper edge of a rail or seat 25 in the rear portion of the pot section 2 so that the pump cylinder can be removed by lifting its rear end upwardly out of the seat or recess 24 while its forward end pivots about the rear end of the respective mouth-piece.

The plunger and cylinder of each metal-injecting pump is thus readily removable for cleaning or repair. The plunger A23 of each metal injecting pump is reciprocatory in the forward portion of its respective cylinder,

the forward portion of each pump cylinder having a port 26 therein through which molten type metal contained in the pot section 2 and in which the metal-injecting pumps are submerged, may enter the respective pump cylinder i front of the plunger therein, and a reci rocatory actuating bar 27 is provided for each pump plunger, each of these actuating bars being guided to slide horizontally in vertical slots or notches 28 formed in the upper edgesof the rear walls of the pot section 2 and its jacket 5 and in a flange 29 which extends upwardly from the respective mouth-piece 20, each bar 27 having an arm 30 extending downwardly therefrom into thepot section 2 and through a slot 31 `formed in the upper wall of the respective cylinder, the arm 30 of the bar 27 being operatively connected to its respective pump plunger 23 bya pin 32, the construction being such ythat reciprocating movements of the bar 27 will be imparted to the respective pump plunger, a forward stroke I of the bar 27 and plunger 23 forcing molten metal in the pump cylinder ahead of the plunger through the mouth-piece 20 and into themold to cast a type bar or slug against the matrix line placed' at the` opposite side thereof and a 'return stroke of the bar 27 and plunger 23 permitting a fresh supply 4of molten type metal toflow into the pump its 39, these spring actuated plungers serving f to force the upper pot section together with its jacket and the metal-inj ecting pumps and their mouth-pieces into casting position, as will' hereinafter appear. v

The rear end of each pump plunger actuating bar 27, which passes through a slot or notch 40 in the upper edge of the frame 33, hasa link 41 pivotally connected to it, and each of these links is pivotally connected to an arm 42 which extends upwardly from an actuating lever 43, the actuating levers 43 for the different metal-injecting pumps being all loosely mounted on a horizontal shaft 44 the ends of which are supported in theside arms 34 of the frame 33. The forward end of each lever 43 in front of the shaft 44 has a tension spring 45 connected to it, this` spring acting in a direction to drive the respective pump plunger on its metal-injecting stroke, the opposite end of each of the springs 45 being attached to an arm 46 which is loosely mounted on a stationary shaft 47 mounted in the lower portion of a, stationary frame 48, each of the arms 46 preferably having a hub provided with circumferentially spaced teeth 49 arranged to be engaged by a dog or latch-50 which serves to lock the arm 46 in different angular positions on the shaft 47 and thereby holding the respective spring-45 under different desired tensions.

The upper pot section together with the metal-injecting pumps and their mouthpieces are moved to and from casting position and the metal-injecting pumpsare actuated by cams carried on a `cam shaft 51 which is mounted in suitable bearings on the stationary frame 48 and may be drlven at appropriate intervals in the direction indicated by the arrows in any suitable manner, this cam shaft being for example the main cam shaft of a matrix composing and line casting machine of the class hereinbefore referred to. A pair of cams 52 xed on this cam shaft control the movements of the upper pot section to and from castingposition, the rollers-38 riding on the peripheries of these cams and bein held in ,contact therewith by the tension o they .the upper pot section being then in its northe springs 45, the concentric peripheries of these cams having raised portions 528L suitably located thereon to act on the rollers 38 and to force them `and the plungers to which are attached forwardly, the. plungers actlng through the springs 36 overcome the opposing action of the springs and to force the upper pot section forwardly to bring the mouth-pieces of the metal-injecting pumps into casting position against the rear side of the mold. When the raised portion 52a of these cams pass the rollers 38, the upper pot section together with the metal-injecting pumps will be retracted from castingposition under the pull ofthe springs 45, but in order to provide positive means for'retracting the upper pot section and the metal-injecting pumps from casting position in the event solidified metal should cause the pump mouth-pieces to stick tothe rear face of the mold, bars 53 carrying` rollers 54 are fixed to the arms 34 of the frame 33 and extend rearwardly therefrom, and these rollers are ar-" ranged to be engaged by the flange portions which project from the sides of the cams 52 so that they will engage in front of the rollers 54 and positively draw them rearwardly in the event the rollers 38 do not re- -main in contact with these cams under the pull of the springs 45, the upper pot Jsection being thereby positively drawn rearwardly by the cams 52 to remove it from casting position, the cams 54 riding idlywithin the troughs .formed inside of the flanges 55 of the cams during the remainder of their rotation,

mal or retracted position.A

The actuating bars 27 for the metal-injecting pumps are operated under the control of cams 56 which are ixedto the cam shaft 51, these cams cooperating with rollers' 57 on the rear ends of the levers 43. The rollers 57 are held in contact with the peripheries of these cams by the tension of the respective springs 45, the major portion of the periphery of each cam 56 being concentric with the axis of rotation thereof but having a notch or cut-away portion at a predetermined point which allows the roller 57 to rise or move toof the respective spring 45 to permit the corresponding metal-injecting pump to perform its metal-injecting operation, a slope or incline 58 leading from the notch or cut-away portion to the concentric riphery of the cam over which the roller 5gemay ride to return the pump plunger to its normal retracted position. Each pump cam 56 has a trip block 59 fixed thereto and projecting from a side thereof, and ,each of these trip blocks is arranged to cooperate with a trip latch 60, thesev trip latches -being loosely mounted on a common horizontal pivot shaft 61 the ends of which are supported in the sides of the A-frame 3 3, the trip latches being urged upward the center of the cam under the action\ -tions opposite to the rollers 57, but the continued rotation ofthe cams 56y causing the 'trip blocks ..59 to act on the latches 60to disengage them from the dogs 64 thus thereby permit the bars 27 to be driven forward under the action ofthe springs 45.

For the purpose of locking off one or two or even all of the pumps against operation, latches65, one for each pump, are pivotally mounted preferably on the rear side offthe pot cover 15 immediately above the respective bars 27, and they are provided with spring Clips 66 for normally holding them in the inactive osition shown by the full lines inF ig. 3. ach of the pump actuating bars 27 is providedtwith a notch 67 which is positioned to receive the respective latch 65 when the'latter is thrown downwardly into locking position as shown in dotted lines in Fig. 3, the actuating bar 27 being-then in its retracted position and the latch, when engaged therewith, locking the respective pump actuating bar 27 from operation. lThese latches65 may be set or operated by hand. If the slug to be cast is of a length substantially equalto the width of one of the pump mouth-pieces 20, which may, for conare to be cast, one or both of the remaining .pumps may be brought into action by appropriate setting of the respective latches 65. Molten metal from the. lower pot section 1 kis pumped therefrom up into the upper pot section 2 to maintain a uniform'supply of molten metal therein, by a pump plunger 68 which reciprocates vertically 'in the pump well 12 in the lower pot section 1, and this pump plunger is operated by a cam 69 which is fixed to the main cam shaft 51, this cam having the major-portion of its periphery concentric to its axis of rotation but having a notch or recess 70 therein and an incline 71 leading from said recess back to its periphery. This cam cooperates with a roller 72 j ournalledA on the rear end of a lever 73, this lever being pivoted at 74 to one side of the frame and having its forward endv venience, be made equal to the width of the izo ' ing pumps,

' M bearing surface 71 during the continued rotation ofv the cam 69 raises the feed pump plunger 68 to its normal retracted position and restores the spring 76 to its normal tension.

The cam 69 which operates the feed pump plunger is so setv on the shaft 51 relatively to the cams 56 thereon which control the operation of the metal-injecting pumps that a metal feeding stroke of the pump plunger l68 will take place simultaneously with the metal-injecting operation of the metal-injectand the molten metal from the lower pot section 1 is forced upwardly through a pipe 78 which leads through the Wall 79 of the feed pump well and through the outlet 80 at the upper end of this pipe into the upper pot section 2, thus re lacing molten metal removed therefrom by the metal-injecting pump or pumps therein.

Preferably, the metal feed pump is of a capacity sufficiently large to supply to the upper pot section a quantity of metal equal to the largest slug that might be cast, thus insuring the maintenance of a supply of molten metal in the upper pot section at all times, and any surplus molten metal introduced by the feed pump tothe upper pot section will voverflow from the latter and return to the lower pot section through an overflow pipe 81 which extends upwardly through the bottom of the upper pot 'section to a predetermined height which'will determine the normal level of molten metal in the upper pot section. The top ofthe overflow pipe is located on or slightly below the level of the metal-injecting orifices of the pump mouthpieces 20 so that the normal level of the molten metal in the upper pot section will be maintained at or slightlybelow the orifices of the pump mouth-pieces, as will be clear from Fig. 3.

In operation, a composed line of matrices the usual type forming characters is presented in front of the mold 21 on the mold wheel'22, these' parts being for example the same as those commonly used in typographical machines of the class shown in the patent hereinbefore referred to and having no bearing upon the present invention and being well understood in the art so that further description thereof is deemed unnecessary, although it is to be understood that the linevof matrices may be handk composed or assembled in an associated matrix setting machine. The main shaft 51, which may be driven through gears or any other suitableI connection from an electric motor or other source of power is caused to rotate in the direction indicated by the arrows, and when the `raised portions 52a of the cams 52 reach the rollers 38, the upper pot section together with the metal-lnjecting pumps therein is moved forwardly from the position shown by the'dotted lines in Fig. 1 to the full line position'shown in that figure, thus bringing the upper pot section into casting position with the mouths 20 of the metalinjecting pumps in metal-tight engagement with the rear face of the mold 21. The mounting of the uppergpot section on the parallel links 6 causes it to move forwardly in a substantially horizontal line in locking up the pump mouth-pieces against the rear face of the mold.I

As soon as the mouth-pieces of the metalinjecting pumps become locked up against the mold, the cams 56, ately set on the cam shaft 51, have reached such position in their rotation where the notched or cut-away portions thereof are opposite to the rollers 57, the rollers 57 being then free of contact with the cams 56, as shown in Fig. 3, and at the same time the trip blocks 59 on the cams 56 reach and engage the trip latches 60 as shown in that figure, and continued rotation of the cams 56 causes the trip latches 60 to become depressed against the tension of the springs 62 whereby i they release the dogs 64 from the notches 63,

and the pump levers 43 are then free to swing about the shaft 44 and to drive the respective pump actuating bars 27 forwardly and thereby cause the corresponding pump plungers to operate to inject molten metal 'from the pump cylinders under the tension of the respective springs 45. Further rotation of the cam shaft will carry the raised portions 52a of the cam 52 beyond the rollers 38 so that the tension of the springs 45 w1ll act to withdraw the casting pot from the casting position shown b the full lines to the position shown by t e dotted lines 1n which are appropri- Fig. 1 and will bring the cams 56 into position to re-engage the rollers 57 and to retract the pump plungers by drawing rearwardly the respective bars 27 a ainst the action of the springs 45, until the n ogs 64 on the levers 43 become re-engaged 'with the notches 63 1n the latches 60, the latter then locking the pumps against metal-injecting operation until the next cycle kin the operation of the machine takes place.

At the time the metal-injecting strokes of lthe metal-injecting plungers 23 take place or shortly thereafter, the cam .69, due to its setting on the cam shaft 51, reachesV a position where the-` roller` cess 70 in this cam, and the lever 7 3 is then released so that it may swing under the tension of the spring 76 in a direction to force 72 is opposite the re the feed pump plunger 68 downwardly and thereby force a fresh supplyof metal from the lower pot section upwardly through the feed pipe 78 and into the upper orcasting pot section to replace that removed therefrom by the metal-injecting pumps, and continued rotation of the cam 69 causes the roller 72 to ride up the incline 71 on this cam to the concentric portion of its periphery, thereby raising the feed pump plunger 68 preparatory toits metal feeding operation.

It will be seen from theforegoing that the movement of the casting pot to andl from casting position is relatively short and the mechanism for effecting such-movement acts 'substantially in a direct line with the mouthpieces of the'metal-infecting pumps, and it will also be seen that the members which actuate the pumps are relatively small and light in weight and the cams for operating the pumps and the casting pot are very light and of small diameter so that the main cam shaft, the pumps and their operating parts may easily withstand a relatively high speed of operation with substantially no wear or strain on the bearings. Furthermore, the arms at the sides of the casting pot and their operating rollers are so arranged that the cams wil drive the casting pot forwardly evenly at both sides thereof, thus forcing the pump mouth-pieces squarely against the mold, and the spring plungers through which this action is effected serve to cushion the lock-up of the casting pot against the mold and to insure tight sealing of the pump mouth-pieces against it.

It will also be evident that at each casting cycle of the machine forthe casting of a type bar, a supply of metal suiiicient to cast the largest slug that might be cast will be pumped from the stationary pot section below into the upper casting pot so that the upper casting pot will always contain metal up to the level of the overflow pipe and hence level with or slightly below the metal discharge orifices in the mouth-pieces of the metal-injecting pumps, -so that a minimum amount of air will be contained `in the metal Ipot mouth-piece above the molten metal therein. Also, since the metal pumped from the stationary lower pot section into the upper casting pot is already in a thorough y heated and mixed state and such metal will be maintained at a substantially constant casting temperature in the upper casting pot since no cold metal is' fed into it, uniformity in the casting of the type bars is insured. While it'is generally preferable to arrange the feed pump plunger so that it willsupply to the upper casting pot a quantity of metal sufficient to cast the largest slug that might be cast, it will be obvious that the amount of metal fed by the metal feed pump may be varied as desired by appropriately shaping thedriving cam for the metal feed pump plunger and thereby altering the stroke of the metal feed pump plunger 1zlznd its displacement in the feed pump we Since only the upper or casting pot which may contain only enough molten metal to maintain a supply thereof for the metal-injecting pumps requires shifting to and from casting position While the lower or melting pot containing the relatively large or main supply of metal remains stationary, it will be evident that the weight of the parts which require shifting to and from casting position is relatively small and hence the speed of 'operation of the casting mechanism may be greatly increased above that heretofore possible where the entire casting pot and the complete supply of molten metal contained therein requires shiftingL to enable the pot to be carried to and from casting position, and the relatively light weight of the parts which 4require shifting also enables the pot operating means to be made lighter in weight and capable of operation at higher speed than heretofore.

By arranging the metal-injecting pumps horizontally and with their axes only slightly below the level of the metal discharge orifices of the mouth-pieces, the molten metal is forced into the mold by the shortest and most direct path and without requiring the pump plungers to substantially lift the molten metal, and since the body of molten metal in the discharge throat of each pump normally stands at a level slightly below the discharge orifice in the mouth-piece, it being automatically maintained at such height by the overflow for the upper casting pot irrespective of the number of pumps in operation, the amount of air contained in the throat above the molten metal therein is always reduced to a minimum, thereby enabling more perfect and solid type bars to be cast and also enabling the typepmetal to en.-

ter and fill the mold more rapldly, unretarded by air ahead of the metal, with the result that the casting mechanism may operate more rapidly and produce an increased output of type bars. y

I claim as my invention 1. In a line casting machine having a line casting mold, a casting pot to contain a supply of molten metal, a plurality of separate metal injectingthroats mounted on and closing the front of the pot and having alined and contiguous mouths, said pot being mounted movably to carry said mouths to and from casting positionagainst the respective portions of the mold through one or more of said mouths according to the length of the mold cavity,

` and means for maintaining the metal level 1in the casting pot above said pumps and. immediately below the level of said mouths.

f 2. In a line casting machine, a casting pot to contain a supply of molten metal, a metalinjecting pump having a discharge mouthpiece, said pump being mounted horizontally in said pot and communicating therewith to receive molten metal therefrom, a melting pot located below said casting pot and having means for forcing molten metal upwardly therefrom to said casting pot, and an overiow in the casting pot located at approximately the height of the pump discharge mouth-piece for returning superflous metal to said melting pot.

3. In a line casting machine, a melting pot, a casting pot mounted above it and provided with metal injecting means, said @pots being of similar horizontal outlines and the casting pot covering the melting pot, the melting pot having a metal receiving mouth at a side thereof, a pump mounted in said mouth of the melting pot and connected to receive molten metal from the latter, and means for convey-I ing molten metal from said pump upwardly to the casting pot.

4. In a line casting machine, a'. melting pot, a casting pot connected to receive molten metal therefrom and carrying metal-injecting means, and means for mounting the casting pot to move horizontally above and independently of the melting pot into and out of casting position, said pots being of similar horizontal outlines and the outlines of the casting pot substantially overlying the corresponding outlines of the melting pot.

In testimony whereof I have hereunto set .my hand'.

' LE ROY W. WILLIS.

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