USRE15292E - Machine for making molds - Google Patents

Description

E. O. BEARDSLEY AND W. F. PIPER.

MACHINE FOR MAKING MOLDS.

APPLICATION FILED MAR. 26. 1921.

Reiss'ued Feb. 28, 1922. 1 5,292..

75HEEISSHE ET 1.

E. O. BEARDSLEY AND W. F. PIPER.

MACHINE FOR MAKING MOLDS.

APPLICATION FILED MAR. 26. 1921.

Reissuod F01). 28, 1922.

NNN Q Q E. O. BEARDSLEY AND W. F PIPER.

MACHINE FOR MAKING MOLDS.

APPLICATXON FILED MAR. 26. 1921.

Reissuod Feb. 28, 1922,

E. 0.. BEARDSLEY AND W. F. PIPER.

MACHINE FOR MAKING MOLDS.

APPLICATION FILED MAR. 26. 1921.

,Reissued FebsZS, 1922. 1 5,292.

?SHEETSSHEET 4.

- C imovfifi m $22 d V 39% PILiSSIICd Feb. 28, 1922.

E. 0. BEARDSLEY AND W. F. PIPER.

MACHINE FOR MAKING MOLDS.

APPLICATION FILED MAR 26, 1921.

I SHEETS-SHEET 5.

E. O. BEARDSLEY AND W. F. PIPER.

MACHINE FOR MAKING MOLDS.

APPLICATION FILED MAR. 26, 1921.

Reissued Feb. 28, 1922 E. O. BEARDSLEY AND W. F. PIPER.

MACHINE FOR MAKING MOLDS.

APPLICATION FILED MAR. 26. 1921.

Reissued Feb. 28, 1922.

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mm 0. 3mm, or CHICAGO, am) wam'ira r. PIPER, or. on rm, ILLINOIS,

ASSIGNOBS TO THE BEABDBLEY POBATION OF ILLINOIS.

, I AOHINE FOR MAKING HOLDQ Specification of Beissued Letters Patent. Rei d F b 2 1922.

Original No. 1,335,641, dated latch 30, 1920, Serial llo. 178,354, filed june 22, 1917. Applicatio reissue filed larch 26, 1921. Serial No. 455,988. a

I To all whom it may concern:

Be it known that we, Emma O. BEARDSLEY and Wanrnn F. PIPER, bot-h citizens of the United States, and residents 'of Chicago, in the county of Cook and State of Illinois, and Oak Park, in the county of Cook and State of Illinois, respectively, have made certain new and useful Improvements in Machines for Making Molds, of which the following is a specification;

This invention has relation to foundry equipment and comprises primarily a novelconstruction of portable machine adapted to travel over the floor of a foundry and designed especially with a view to facilitating the gathering up of sand, riddling the same, and packing the sand in flasks adjacent to the machinel An especial object of the invention has been to produce a machine of the above type having suitable tract-ion mechanism whereby the machine may be readily moved to any desired place in the foundry under the control of an operator seated upon the machine, there being suitable elevating means for transferring the tempered. sand from the ground or floor of the foundry to the riddle after conveying the riddled sand from the riddle to the impacting device'by which the sand is supplied to the flasks, and the riddle and impacting device being peculiarly supported on a swinging jib and a swinging arm carried by said jib. The jib and swinging arm are under such control by the operator that they may be readily moved into -various positions either in alinement or at angles to one another so as to afford much advantage by way of obtaining a wide range of operating area especially for the impacting device, enabling the latter to supply the riddled sand to flasks located over a very considerable area of surface, other advantages of a similar nature being obtained by are supported in a most advantageous manner upon the portable truck of the machine,

Inclu ed within the invention also is a' special type of riddle embodying desirable cleaning instrimientalities together with an a minus. conrm, or CHICAGO, armors, A

associated conventionally operable device for discharging from the machine foreign mat; ter in the sand, which foreign matter is separated from the sand by the riddling mechanism. The cleaning means for the riddle comprises, furthermore, especially novel means for shifting the riddle bodily wherebyto bring a fresh screening surface into play,said means involving the employment of automatic 'control instrumentalities the advantages of which will be obvious upon a.

thorough understanding of the operation of the invention.

The invention involves, furthermore, a special mounting of gathering and elevating means by which the sand is taken ,up by the machine and transferred to the riddling' mechanism, said mounting being such as to facilitate in one phase of its action, the movement of the machine from one point in the factory to another, and in another phase being advantageous by reason of rmitting yielding of the elevating unit, b0 ily,should the eleva'ting means strike an obstruction in the sand being operated upon thereby.

A full understanding of the various features of the invention above referred to, together with special details of construction not mentioned but comprehended within the novelty of the improvements hereof, will be had upon reference to the following description taken in connection with the annexed drawings, in which Figure 1 is a side elevation of a machine embodying the essential features of the invention;

Fig. 2 is a to plan view, dotted lines showing primari y the operating devices whereby to effect simultaneous or relative movements of the swingingjib and arm carried thereby;

Fig. 3 is an end elevation of the machine;

Fig. 4 is an enlarged sectional view showing principally the manner of mounting the swinging arm upon the 11b, the actuating means for said arm and the automatic operating devices for operating the riddle Fig. 5 is a cross sectional view of the riddle showing a certain portion of the operating means for intermittently imparting a rotative movement to said riddle and likewise showing the cleaning mechanism in part;

- Fig. 6 is afragmentary view partly in section, illustrating the type of four-way control valve utilized for controlling admission and release of pressure at the opposite sides of the working pistons in the working cylinders employed for causing swinging movement of the jiband its supported swinging arm;

Fig. 7 is a fragmentary view, partly in section, bringing out more clearly the mounting of the elevator end of the machine upon the ground wheels and illustrating the means to elevate said end to raise the scraper for facilitating movement from one place to another i Fig. 8 is a fragmentary view partly in sec:

tion, showing more clearly the pressure operated device employed for effecting swinging movement of the jib, said device being substantially the same as that for actuating the arm supported on the jib;

Fig. 9 is a sectional 'view bringing out more clearly certain parts of the automatic means whereby the riddle is shifted rotatively to bring a cleaned screeningsurface into play Fig. 10 isa side view of the automatic valve mechanism controlling the turning of the riddle;

Fig. 11 is a sectional view of the supporting postand column of the truck on which the jib is mounted; and

Fig. 12 is a longitudinal sectional view of the riddle and the supporting chute bringing out more clearly certain interior parts.

Referring to Fig. 1 especially, it will be. ,noted that the machine of this invention comprises a portable truck 1 which truck is equipped with certain traction driving mechanism whereby to cause slow movement of the truck in the direction in which the sand, previously tempered, is piled, sav in a long ,pile. said mechanism being likewise con trollable to operate the truck at a higher speed when it is desired to shift the machine from one place in the foundry to another. The traction driving instrumentalities will be briefly described hereinafter.

It is contemplated that the truck 1 shall be driven by a suitable motor 2 supported permitted to drag upon the ground as desired, this being immaterial to the invention.

Upon the truck 1 is supported a hollow post 4 and journaled in said post is the column 5 having the annular flange 6 formed with a ball race onits under side between whichand the ball race 7 at the top of the post- 4 are provided suitable thrust bearings facilitating the ready rotative movement of the column 5 in the post 1. The column 5 extends entirely through the post 4 and at its lower end said column has "afiixed thereto a gear 8, see Figs. 1, 2 and 8, with which gear there is engaged a rack 9 carried by the end of a piston rod 10. The piston rod 10 is connected with a working pistion 11 in a cylinder 12, and the piston 11 is operable by a suitable pressure medium whereby to shift the rack 9 to thereby turn the post 5 and likewise correspondingly move the jib 13 which is secured in any substantial manner to the upper end of said post- 5.

Supported at" the outer end of the jib 13. is the swinging armv 14 the latter being equipped at its outer end with a sand projecting and impacting device 15 of the type set forth in United States Letters Patent No. 1,207,839 issued December 12, 1916. The

[sand afterbeing riddle and conveyed to the device 15 is projected by the latter into the flasks over which the device 15 may be positioned under the control of the operator who is seated on the seat- 16 carried by the jib 13. and" by reason of the construction of the parts 13 and 14 it will become apparent that the machine of this invention affords an adjustment of the parts 13 and 14 whereby the sand driving or impacting device 15 may operate on flasks arranged over a compara tively large area of surface.

The arm 14 is supported by the means best shown in Fig. 4, wherein itwill be observed that a ball race 17 is attached to the outer end ofthe jib 13 by the U-shaped bolts 18. a

rotative head 19 having ball races on its upper and lower surfaces being connected with the member 17 by asultable coupling 20.

arm 14 and to which also is fixed or keyed the gear 21 with which meshes a rack 22, like the rack 9. A piston rod 23 connected with the rack 22 is attached to its piston 21 operating in a working cylinder 25 and by the application. of a suitable pressure medium to the opposite sides of the piston 21 it will be evident thatthe rack 22 may be actuated so as to turn the arm 11 relatively to the jib 13, various alined andangular adjustments of the parts 13 and 1-1 being thus obtainable in order to bring the devlce 15 into properposition over the flasks of the mold, for purposes well known in the art.

At the end of the machine opposite that from which the a-r'mli extends is located the elevator 25 which is of the endless chain and bucket type and which is adapted to raise sand. previously tempered but not riddled, whereby to carry such sand to the riddling mechanism. The elevator 25 is disposed about at the middle of. and above a sand gathering device; the latter'comprising a scraper casing 26. see Figs. 2 and 3 especially, said casing being bolted or otherwise fastened to the adjacent end of the truck and being somewhat of the shape of a scoop, having at its opposite ends the outwardly inclined gathering or deflecting blades 27. As the machine is slowly fed into the long pile of sand. the gathering device 26 obviously gathers the sand thereinto. Supported by the ends of the scraper cas ing of the gathering device are the con veying screws 28 supported on a shaft mounted in hearings on the casing 26. The screws 28 are reversely arranged in relation to the direction of the pitch of their spirals whereby the sand gathered into the casing 26 is caused to be conveyed from the ends of the casing toward the center, at which point is located the elevator :25. In this manner. therefore, the sand received in the casing :26 is sure to be caught by the elevator 25.

It is notable that the screws 28 are equipped with digging teeth 28 for breaking up sand which may be caked, whereby to facilitate the movement of the sand by the screws and the elevation of the sand in a properly reduced condition to the riddle.

' The elevator 25 and the conveyor shaft 29 are driven simultaneously, the shaft 29 having a sprocket gear at one end connected by a sprocket chain 30,see Fig. 3,with a sprocket gear on the counter-shaft 31 above said shaft 29. The shaft 31 has a bevel gear 32 loose thereon but adapted to be connected with the shaft by a clutch 33. see Fig.3, the latter being normally held in gear-connecting position by a spring 31 on the shaft 31 and there being provided a manual lever 33 to shift the clutch 33. The clutch 33 is provided with clutch teeth of an inclined form to cooperate with corresponding teeth on the gear 32. and this expedient is resorted to in order to insure a driving of the shaft 31 from the drive shaft 36 when the machine is being advanced toward the pile of sand. The clutch 33 automatically disconnects shaft 31 from the gear 3:2 in the event of reversal of the movement of the machine at which time, of course. a driving of the conveyor screws 28 and the elevator 25 is unnecessary and indeed undesirable. The shaft 36 is arranged longitudinally of the truck 1. is equipped with. a gear 37 meshing with the bevelgear 32 aforesaid. and is driven by means that will belater set forth in a general manner.

From the foregoing, it will be apparent that the sand of the pile toward which the machine is fed will be properly gathered by the machine and elevated by the elevator :25. At its upper end,'the elevator 23 is supported by a shaft 38 on'which is carried loosely the upper sprocket gear about which the endless chain of the elevator passes. The shaft 38 itself is associated with pinions 39 keyed thereto and meshing with racks 40 at one side of the slotted upper portions of pedestals 41, said pedestals being bolted or otherwise secured to the upper ends of cylinders 42 and 43, the purpose of which will be presented hereinafter.

Onthe shaft 38, is fixed a grooved pulley l-t to which is connected one end of a cable 45, said cable extending downwardly. to a point of connection with a coiled spring 16 the latter being in turn secured to the truck 1. The purpose of the connecting means -14, 45 and 46 is to afford a yielding counterbalance or tension device cooperating with .the elevator in such a manner as to permit a yielding downward of the latter in the event some obstruction should become caught between the lower s rocket wheel on the conveyor shaft 29 an the conveyor chain passing about said wheel; also the means just described is an automatic tension means for taking up slack in the conveyor-chain, as will be readily obvious.

The material which is raised by the conveyor 25 is dropped by the buckets of the conveyor into a hopper *1? from which hopper the material is fed into the riddling mechanism now to be described.

Supported on the jib 13 is a conveyorchute 48 superposed in relation to the jib and mounted for a back and forth or vibrating movement upon link bars 49 and 50 connecting the parts 48 and 13. Above the chute 48 and mounted in hearings on suitable brackets 51 attached to the chute is a shaft 52 equipped with spiders 53. the outer ends of the arms of which are bolted or otherwise attached to the sides of a triangular shapedriddle 54. The riddle 54 has two perforated sides forming riddling or screening elements and one imperforate side 51". The hopper 47 is open at one end and the material deposited therein from the elevator '25 is adapted to gravitate into the adjacent open end of the riddle 54. One of the perforate sides of the riddle 54 is always operative and the material is sifted by the riddle as an incident to the vibrating movement of the latter with the chute 48. said chute 48 being inclined in order to effectuate its conveying function.

To the lower ends of the shaft 52is fixedly secured an arm 55 which arm is pivotally connected at its outer end with the rod 56 of a piston operating in ayertical cylinder 5T pivotally supported at its lower end at 58 on a suitable bracket attached to the chute 48. The pressure medium by which the pistons of the cylinders12 and are operated is also adapted to be supplied to the cylinder 57 in such a manner that the piston in the latter may .be raised and lowered intermittently. The raising movement of the piston 57, see Fig. 5, is intended to rotate the riddle 54 one-third of a revolution whereby to bring a fresh cleaned perforate side of the riddle lowermost, and to raise the previously lowermost perforate side for cleaning operation thereon by certain cleaning devices to be described.

The imperforate side 54 of the riddle is simply an inactiveside portion, the two perforated sides being alternately brought into play by the reverse movements of the piston 1n the cylinder 57. Projecting from the bracket 51 at the lower end of the riddle 54 is a tubular support 59 through which the shaft 52 passes and on this support 59, which extends only about two-thirds the length of the riddle 54, is carried the riddle cleaning device. The cleaning device just mentioned includes a cross piece 60 loosely and rockingly mounted on the member-59 by means of a fastening bolt 61, see Fig. 5, said crosspiece 60 having longitudinal knockers 62 at its opposite ends adapted to hit against the sides of the riddle .54 whereby to effect cleaning of the latter by dislodging any materials adhering thereto and tending to stop perforations in said sides. At one end the cross piece 60 is weighted, as shown at 63, and the weightmeans has a tendency to to .the link bar 50 and engaging a ratchet wheel 65 on the jib 13. A reverse-movement-preventing pawl 66 also coacts with the wheel65 and is arranged below the feed pawl '64. The ratchet wheel 65 has a feed pawl 67 eccentrically connected thereto and operable thereby to engage and turn a ratchet wheel 68, see Figs. 4 and 9, the ratchet wheel 68 being looseupon the spindle 69 of a four- 1 way valve 70. The valve 70 has keyed thereto, alongsidethe wheel 68, a disk 71 and the disk 71 has a pin 72 projecting laterally therefrom' into a slot 73 of, the wheel 68. The pin 72 projects from the inner slde'of the disk 71 and on the outer side of the latter are provided a plurality of studs 74 carrying rollers 75 which are adapted to be en gaged by a flat spring 76 bolted to the jib 13.

T he pressure medium used for operating the various pistons in the several cylinders heretofore described is adapted to be conas the chute 48vibrates'back and forth, as

an incident to the turning of the ratchet wheel 68. the latter being adapted to move independently of the disk 71 but so as to intermittently turn said disk sufficiently to cause the spring 76 to act upon the rollers 75 at certain intervals of time in order to ivc the valve 70 a quick turning movement. he quick turning movement of the valve 70 effected at such intervals of time is intended V to momentarily open the main pressure line to the cylinder 57 whereby the piston in the latter will be quickly moved to turn the riddle one-third of a revolution in the man ner previously described. The foregoing action of course brings a fresh cleaned perforate side of theriddle lowermostand the operation is performed quickly in order that there may be no time interval of inactivity so far as the functioning of the riddle is concerned. The provision of the pin and slot connection between the parts 71 and 68 is de signed to permit of the quick partial revolution of the disk 71 and corresponding movement of the "alve 70. desirable for the purposes above described. It is contemplated additionally that the connection between the feed pawl 64 and the link bar 50 may be adjustable as by the provision of a plurality of openings for the pivot connection between these two parts so that the intervals of. time between the rotative movements of the ridbe required for mostefl'ective operation of the machine. The operation of the riddle in the manner just described is of course, however, entirely automatic.

After the sand has sifted through the riddle 54 and is deposited in the chute 48 it is conveyed by the chute 48 to a second chute 78. To insure that the sifted material will pass into the chute 78 the portions of the chutes 48 and 78 which overlapat adjacent ends are preferably somewhat enlarged and these portions are likewise located concentric in relation to the pivotal connection established by the parts 17, 19 and 20, intermediate the jib 13 and the boom 14. Under these conditions, no matter at what relative angles the jib and its arm are disposed, and also when these parts are in alinement. communication is properly established between the adjacent ends. .It is preferred that the tive cylinder, the piston of which is conchutes 48 and 7 8 be covered at the top-portions.

The chute 78 is supported by link bars 79 similar to the bars 49 and 50 supporting the chute 48 and the means for vibrating the chutes 48 and 78 are quite analogous involving the provision for the chute 48 of a motor 80 having a belt 81 arranged to drive a crank-shaft 82 disposed in suitable bearings just above the post 5. A pitman 83 connects the crank of the shaft 82 with the chute "48 and the shaft 82 may have a fly wheel suitably counter-balanced to compensate for the load of the chute 48 and contents, all as conventionally employed in driving mechanism of this type.

The driving means for the chute 78, which is inclined similarly to the chute 48, comprises a motor 84 carried by the arm 14 and connected by a drive belt 85 with} pulley wheel 86 on the shaft 15 of the impacting device'15, said shaft 15 carrying an impacting or sand drivin member of the'type referred to in the fitters Patent previously identified. On the end of the shaft 15, opposite the pulley wheel 86, is a pulley 87 con- .nected by a belt 88 with a pulley 89 on a being conventional. Situated also in front of the seat 16 convenient for control by the operator are two four- way valves 94 and 95, one for controlling the application of pressure on the action' of the pressure medium on the piston in the cylinder 12, for operating the jib 13, and the other for controlling the pressure on the piston in the cylinder 25 for actuation of the arm 14 relatively to the boom. The four-way. valves 94 and 95 are of the type shown in Fi 6, a type sp'ecially constructed by us for" t epurposcs of our invention. It; is to be understood. however, that any suitable effective type of four-way valve may be employed in lieu of those just referred to, the object of these valves being to effectively control the operation of the respective pistons in the cylinders 12 and 25 as aforesaid.

Since the detailed construction of the valves 94 and 95 does not form a part of the present invention, this feature will be generally described only. Each of the valves 94 and 95 embodies a casing connected by pipes 96 with opposite ends of the respectrolled by the valve. casing isconnected by pipes 97, one leading to a pressure storage reservoir 43" and the other to a pressure receiving reservoir 42, both of which reservoirs are shown in Fig. 3. The presure medium used for the purposes of the invention may be oil, water or a suitable fluid medium and we provide a pump 98, see Fig. 2, which pump is connected so as to force the pressure medium received back into the reservoir 42, into the reservoir 43; In other Words, it may be noted that the pressure medium as it 'ex hausts from the cylinders 12 and 25 passes to the reservoir 42 and enters the cylinders 12 and 25 from the reservoir 43. Furthermore the valves 94 and 95 are arranged in such manner in respect to the pipes or conduits connecting the parts 12, 25, 42 and43 as to readily permit the operator to properly control the passage of the fluid pressure medium into and out of the cylinders, and consequent operation of the jib 13 and its arm 14. Since the conduits or pipe connections for the four- way valves 94 and 95 may be conventional, they are not illustrated in detail.

It is contemplated to employ an idler pulley 99 supported at the outer end of the arm 14 to support the belt 85 so that th latter will not be in the way of workmen, operating around the'machine. Likewise the casing of the impacting or sand driving device 15 is suitably connected by a casing member 100 with the chute 78, the latter entering the rear end of said casing member 100.

At one side of the seat 16, see Fig. 2, is located a box 101 supported by a shaft 102 so as to be rotated with the latter for dumping purposes. A lever 103 is connected to turn the shaft 102 in order to dump the box 101*, and said box is located so that foreign matter passing longitudinally through the riddle 54, and preyentedby the screens from dropping into the chute 48, may. pass to the box 101. After accumulation of sufiicient of the foreign materials in th box 101, said box may readily be dumped by the operator into a wheel barrow, or other receptacle, as an incident to actuation of the lever 103.

Referring to Figs. 3 and 7 especially, it is to be observed that the supporting wheels of the truck 1 located adjacent to the gathering device 26 are mounted upon stub axles 104 carried by vertical spindles 105, the latter journaled in suitable brackets 106 fixed to the truck 1. At the upper ends of the brackets 106 are provided ,0 linders 107. In the cylinders 107, one of whic is) provided for each spindle 105, is a piston 108 having a ball bearing connection 109 with the spindle. Connected with the cylinders 107 is a presure medium supply plpe 110 and a mntrolling valve 111 near the pump 98 Likewise said valvewhich is adapted to be operated so 'as to cause the pressure medium to enter the cyl inders 10? whereby to cause relative movement of the cylinders andtheir pistons 108 such that the end portion of the truck supported by the wheels adjacent the elevator 25 may be caused to be raised bodily a short distance, and maintained raised by maintaining the pressure in the cylinders 107 acting upwardly on the tops of said cylinders and downwardly on I the pistons 108. In view of the foregoing provisions the frame of the truck and the supported parts may be raised with the gathering device or scraper casing 26 so as to elevate the latter a sufliclent distance from the ground to clear all ordinary obstacles which might be in its path when the machine is being moved from one place to another. 1

I For the purpose of facilitating steering of the machine we contemplate the employment of steering arms 112 projecting rearwardly from the stub axles 104 and attached to a steering bar 113*, see Fig. 2. A cylinder 11 1 on'the truck 1 adjacent to the pump 98 has its piston rod connected by alink 115 with the steering bar 113 and anysuitable provision may be made for supplying a pressure medium to opposite sides of the cylinder 114 in order to shift the bar 113 and correspondingly turn the steering Wheels supported by th stub-axles 101. a

As previously premised herein, there is utilized for the purposes of this invention suitable traction means which is designed similarly to many mechanisms of this type, namely for the purpose of'moving the ma-' chine slowly when operating in connection with its regular work, namely the elevating, riddling and conveying of the sand to the flasks, and adapted to move the machine at a greater speed when the purpose'in view is to transport the machine from-one place to another. Since the traction operating instrumen-talities as used by us may be modified to a considerable extent and we do not wish to be restricted to the employment of strumentalities therefor.

the particularmeans used, any more than to the employment of other conventional parts, such as motors, pulleys, and connections, the traction means will. be only generally described in connection with the driving in- Ve'employ; a rear split axle 116, see 2,

with a differential 117 of any suitable type connecting the sections of the axle. The rear traction wheels 118 are. suitably'mounte'd in turn. with the sections of the axle 116 and.

they maybe turned independently as an incident to the functioning of the differential gearing 117 as. when it is desired that the machine be steereda more or less crooked course whether for operating upon a crooked,

elongated pile of sand, or for purposes of general portability.

we utilize a lever 119 and alocking pin device 120, see Fig. 2, to lock the sections ofthe axle 116 together,a nd incapacitate the differential gearing 117, when it is desired that the machine move in a'substantially straight line such as would be desirable when a traveling longitudinally of a straight pile of sand being gatheredand elevated thereby.

The driving instrumentalities employed are substantially as follows: The motor 2 by a belt connection 121 drives a shaft 122, this shaft 122 drives the pump 98 by raising of the sprocket chain connection 123 with the rotor of the pump. The shaft 122 drives the shaft 36 previously described as operating the conveyor shaft and elevator by reason of the provision of sprocket chain driving connections 124., see Fig. 2. The shaft 36 carries a friction gear 125 movable across the face of a, friction disk 126 and thereby adapted to drive "said disk at a greater or less speed as required. The disk 126 is carried by a shaft and suitable worm gearing 127 connects the shaft of the disk 126' with the shaft 128, the latter being connected by sprocket chain connections 129 leading to a shaft 130 carrying a worm 160'by which the differential gearing 117 is driven. This is the usual driving connection established for slow movementof the machine in performing its-work "on the pile of sand.

Whenit is desired to move the machine to transferit from one place to another,'at

greater than its ordinary speed", a direct connection between the shaft 36 and the shaft 130 may be established by k means of the clutch 131 keyed on the shaft 130 and engageable with a clutch element 132 on the shaft 36. The clutch element 131 is opable by a suitable manual lever 133 and the sprocket chain connection 129 operates about a sprocket wheel loosely mounted on the shaft 130. It isnecessary, therefore, that the lever 133 be moved to throw the clutch 131 into engagement with the clutch element 134 on the shaft if the slow and.

variable driving connection between theshafts 36 and 130is to be used. In addition to the control of movement of the machine by the'switch 93 in front of the seat 16, there is located adjacent to the valvelll and therefore near the pump 98, a second switch 135 operable to control the motor 2 for moving the machine around the factory in a reverse direction.

There is" provided" above the truck 1 and extending over oer tain parts of, the driving gearing, protectmg these parts against injury from falling sand or substances and also forming a supporting deck on which the operator may stand. when necessary.

A lever 137 i is preferably employed for shifting the friction wheel 125 across the surface of the friction disk 126whereby to a protecting plate 136 govern the action of the variable speed transmission mechanism set forth, under certain conditions of service.

An important characteristic of the invention is that theramming head is supported by a jib-and arm which are pivotally connected so as to permit only lateral movement, and. as a result, the ramming head at the outer end of the arm can be moved laterally and bodily to project the sand into all portions of the flask without varying the angle of delivery of the sand in the mold. In practice. it has been found that the most efficient angle of delivery is substantially vertical when the mold is horizontal, because the wads will then successively pack in or build up the moldwith the least displacement of the previously delivered sand in the mold. When the angle of delivery is variant or substantially obtuse or acute with respect to the general plane of't-he mold, the projecting wads of sand will tend to displace and disrupt the sand which has been previously delivered into and packed in the mold. V

Having thus described the invention, what is claimed as new is:

'1. In a machine for making molds. the combination of a movable carriage, a sand projector mounted on the carriage and comprising a rotor, means mounted on the car-. riage to feed sand from the floor to said projector, and means'mounted on the carriage for operating the rotor and the feedmeans.

2. In a machine for making molds. the combination of a movable carriage. a sand projector mounted on the carriage and movable relatively thereto to project sand into different portions of a flask, and comprising a rotor, means mounted on the carriage to feed sand from the floor to the projector,

and means mounted on the carriage for operating the rotor and the feed-means.

3..In a machine for making molds. the combination of a movable carriage, a sand projector mounted on the carriage and comprising a rotor, means mounted on the carriage to feed sand from the floor to said projector, comprising a conveyor adjacent the floor and an elevator, and means mounted on the carriage for operating the rotor and the feed-means.

4. In a machine for making molds-the combination of a movable carriage, a sand projector mounted on the carriage and mov-- able relatively thereto to project sand into different portions of a flask. and comprising a rotor, means mounted on the carriage to feed sand from the floor to the projector. comprising a conveyor adjacent the floor and an elevator, and .means mounted on the carriage for operating the rotor and the feed-means. V

5. In a machine for making molds, the

combination of a movable carriage. a sand projector mounted on the carriage and comprising a rotor, means mounted on the carriage tofeed sand from the floor to said projector. comprising a screw-conveyor adjacent the floor and a bucketelevator, and means mounted on the carriage for operat' ing the rotor and the feed-means.

6. In a machine for making molds. the combination of a movable carriage, a sandprojector mounted on the carriage and mov able relatively thereto to project sand into different portions of a flask. and comprising a rotor, means mounted on the carriage to feed sand from the floor to the projector, comprising a conveyor adjacent the floor, an elevator and conveying means movable with the projector, and means mounted on the carriage for operating the rotor and the feed-means.

7. In amachine for making molds. the combination of a movable carriage, a sandprojector mounted on the carriage and comprising a rotor, means mounted on the carriage to feed sand from the floor to said projector, and means mounted on the carriage for driving the rotor and propelling the carriage.

8. In a machine for making molds. the combination of a movable carriage, a sandprojector mounted on the carriage and movable relatively thereto to project sand into different portions of a flask. and comprising a rotor. means mounted on the carriage to feed sand from the floor to the projector, a riddle mounted on the carriage. and means 'mounted on the carriage for operating the rotor and the feed-means.

9. In a foundry machine of the class described. the combination of a support. a,jib mounted thereon for horizontal swinging movement, an arm pivoted to the outer end of the jib for horizontal swinging movement, conveying devices disposed upon the jib and arm lengthwise thereof and in com munication with one another, means for supplying sand to the conveying devices of the jib for delivery by the conveying device of the arm, and a projector comprising a rotor, mounted on the outer end of .the arm. 3 1

10. In a foundry machineof the class described, the combination of a portable truck, a jib mounted thereon for horizontal swinging movement. an arm pivoted to the outer end of the jib for horizontal swinging movement, conveying devices disposed 'u fon the jib and arm lengthwise thereof and in communication with one another, and a riddle supported by one of said conveying devices and adapted to derive motion there-' from. Y

11. In a foundrymachine of theclass described, the combination of a portable truck.

a jib mounted thereon for horizontal swingsaid chutes, a riddle supported by the chute ing movement, an arm pivoted to the outer end of the ib for horizontal swmging movement, inclined chutes'disposed upon the jib and arm lengthwisethereof and in com munlcatlon with one another, means for 1m- Tparting longitudinal vibratory movement to SQIClClIUtGS, a riddlesupported by one of said chutes, and cleaning/means for said riddle operable as an incident to the vibratory actuation of the chute supporting said riddle. v

12. In a foundry machine of the class described, the combination of a portable truck,

a jib mounted thereon for horizontal swinging movement, anarm pivoted to the outer end of the jib for horizontal swinging movement, inclined chutes disposed upon the jib and arm lengthwise thereof and in communic'ationwith one another, means for imparting longitudinal vibratory movement to said chutes, and a riddle supported by the chute carried by the jib and inclined in the direction'of inclination of said chute and movable therewith.

I 13. In a found "'y machine of the class described, the combination of a portable truck,

a jib mounted thereon for horizontal swinging movement, an arm pivoted-to the outer end of the jib for horizontal swinging movement, inclined chutes disposed upon the jib and arm lengthwise thereof and in communication wlth one another, means for 1mparting longitudinal vibratory movement to carried by the 'ib so as to supply'riddled materials to sai chute, and automatic cleaningmeans mounted in said riddle and operable. asan incident to actuation of the chute supportin the riddle.

14. In a-foun ry machine of the class described, the combination of a portable truck, a jib mounted thereonfor horizontal swinging movement, an arm pivoted to the outer end of the jib for horizontal swinging movement, inclined chutes disposed upon the jib and arm lengthwise thereof and in communication with one another, means for imparting longitudinal vibratory movement to said chutes, a riddle supported by the chute carried by the jib so as to supply riddled materials to said chute, automatic cleaning means mounted in said riddle and operable as an incident to actuation of the chute suppdrting the riddle, said riddle embodying a plurality of perforated surfaces and means to automatically bring said surfaces into ac- I I tion at different times.

15, In a foundry machine ofthe class described, the combination of a portable truck, a jib mounted'thereonfor horizontal swinging movement. an arm pivoted to the outer,

end of the jib for horizontal swinging I movemenhinclined chutes disposed upon the j ib andi'arm lengthwise thereof and in communication with one another, means for imparting longitudinal vibratory movement to said chutes, and a riddle supported by one of said chutes and comprising a plurality of perforate surfaces, and means operable as an incident to the vibratory movement of the chute supporting the riddle whereby to bring said'perforate surfaces of the riddle into play at different times; v

16. In a foundry machine of the class de scribed, the combination of a support, a jib mounted" thereon, a conveying chute sup ported on the jib, means for actuating said a chute to cause passage theret-hrough of ma terial delivered to the same, a riddle mounted on said chuteand movable incident to actuation of the latter whereby to supply riddled materials to the chute, said riddle embodying a plurality of perforate surfaces and means for bringing said surfaces into play intermittently.

17. A machine as claimed in claim 16 wherein the surfaces of the riddle are intermittently brought into action by auto matic means controlled by themeans for actuating the chute.

18. In a machine for filling molds, the combination of a rotatable sand projector,

means for driving the projector, means for movably supporting the projector so it can be shifted laterally to project/sand intoall" portions oft-lie mold at a substantially non- "ariant angle of delivery and means to feed I sand to the projector.

1 9 In a machine for filling molds, the combination of a'sand projector comprising a casing and a rotor, means for driving the rotor, means for movably supporting the projector so it can be shifted laterally and bodily to project sand into all portions iof the mold at a substantially non-variant angle of deliveryand means to feed sand to the projector.

.20, In a machine foi 'filling molds, the I combination of a sand projector, mechanism for drlvlng said device, means for feeding sand to said projector, and a supporting structure comprising a plurality of members which are pivoted to swing horizontally,

the projector being supported at the free end of one of said members, the pivotal conbodily movement of the projector to project the sand at a substantially non-va'riant angle of delivery.

21. In a machine for fillingvmolds, the

, combination of a sandprojecting device,

mechanism for driving said device. means for feeding sand to said device, and asupporting structure comprising a jib and an 'arm' which are both pivoted'to swing horizontally, the projecting device being supported at the free end of said arm, the jib and arm permitting bodily lateral movement nections for said members permittinglateral of the projectin device to project the sand {at a substantial y non-variant angle of delivery. 22. In a foundry machine of the class de- 6 scribed, the combination of a portable truck,

a horizontally Swinging jib supported thereon, a horizontally swinging arm pivoted to the jib, vibratory conveying chutes carried by the jib and arm respectively and 10 in communication with one another, a rotary riddle carried by one of said chutes, and automatic means operable as an incident to the movement of the chute supporting the riddle whereby to intermittently impart a 5 rotative movement to said riddle, the riddle being arranged above the chute supporting the same so as to supply riddled material to said chute. 23. In a machine for filling molds, the go combination of a sand projector, mechanism for driving the projector, a su porting structure comprising a plurality oi pivoted members, and conveyers for feeding sand to the projector, sustained by and movable with said members respectively, the rojector be ing mounted on the free end 0 one of said members.

24. In .a machine for filling molds, the combination of a sand projector, mechanism for driving the projector, a su porting struc- 1 ture comprising a plurality o pivoted members, conveyers for feeding sand to the projector, sustained by and movable with said members respectively, the projector being mounted on the free end of one of said members, and means for vibrating one of the chutes.

25. In a foundry machine of the class described, the combination of a portable truck, 0 a horizontally swinging jib mounted thereon, a horizontally swinging arm pivoted to said jib, conveying devices carried by said jib and arm, operating gears connected with the'jib and with the arm, separate rack devices enga 'ng said gears, and means under the contro ofan operator on the jib for actuatin the said rack devices separately or toget er whereby to turn the 'ib and arm separately or together to adjust t e same so relatively to each other and relatively to the truck.

26. In a foundry machine of the class described, the combination of a portable truck, a jib mounted thereon to swing horizontally,

a horizontally swinging arm carried by the jib, conveying devices for conducting sand from a point adjacent to the point of support of the jib to the free end portion of the swingin arm elevating means for elevat- 0 ing san and disposing same to be conducted off by said conveying devices, and sand projecting means carried by the free end por tion of the swingingsarm.

27. A machine su tantially as claimed in claim 26, combined with manually controllable instrumentalities, operable from the jib for causing movement of the jib and arm whereby to effect various relative adjustments of said parts and correspondingly varied adjustments of the sand projecting means. 28. In mechanism for the purpose set forth, the combination of a jointed support comprising members movable horizontally together and relatively to each other, a motor carried by said support, a casing rigid with one of the support members, and a sand throwing member disposed Within said casing and operatively connected withv the motor.

29. In an apparatus for the purpose set forth, the combination of a rigid supporting member, a laterally extending arm mounted on said support for swinging movement, a motor support carried by the outer end of said arm and arranged to have horizontal swinging movement relative thereto, a motor, and a saIid-throwin member operatively .connected with sai motor, both carried by the motor support.

30. In mechanism for the purpose set forth, the combination of a support comprising horizontally movable members pivoted together for relative horizontal movement, a motor mounted on said support, a sand projector casing rigidly secured to one supporting member, and a projecting member driven by said motor.

31. In a molding apparatus, the eombination of a portable truck adapted to travel on a floor, a cross-conveyer mounted on the truck and adapted to feed sand laterally, a molding machine on the truck, an elevator disposed to receive sand directly from the cross conveyer and elevate it for use in the molding machine, and mechanism on the truck for driving the conveyer and elevator.

32. In a molding apparatus, the combination of a portable truck adapted to travel on a floor, a cross conveyer mounted on the truck and adapted to feed sand laterally, a molding machine on the truck, an elevator having its lower end coaxial with the conveyer and for elevating sand for use in the molding machine, and mechanism on the truck for drivin the conveyer and elevator.

33. In a mol ing apparatus, the combination of a portable truck adapted to travel on a floor, a. cross conveyer mounted on the truck and adapted to feed sand laterally. a molding machine on the truck, an elevator having its lower end transversely alined with and to receive sand directly from the cross conveyer and for elevating it for use in the molding machine, and mechanism on the truck for drivin the conveyer and elevator.

34. In a mol ing apparatus, the combination of a portable truck adapted to travel on a floor, a molding machine on the truck,

a transverse conveyer screw for sand at the front of the truck, an elevator also at the chine, and mechanism on the truck for drivfront of the truck, having its lower end dising the screw and elevator. 15 posed to receive sand directly from the 36. In molding apparatus, the combinascrew, and for elevating sand for use in the tion of a truck, a molding machine mounted.

5 molding machine, and mechanism on the on the truck, a transverse conveyer screw for truck for driving the screw and elevator. sand, an elevator having its lower end con- 35. In molding apparatus, the comb-inanected to rotate with said screw, and adapted 20 tion of a truck, amolding machine mounted to elevate the sand for use in said machine, on the truck, a transverse conveyer screw and mechanism on the truck for driving said 10 comprising members adapted to convey sand screw.

to a common point, an elevator having its lower end disposed to receive the sand at I ELMER O. BEARDSLEY. said point and elevate it for use in said mav WALTER F. PIPER.

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