US1491178A - Sand cutting and mixing machine - Google Patents

Description

April 22 1924.

R. C. STOKES ET AL SAND CUTTING AND MIXING MACHINE Filed June 4:.y 1921 4 Sheets-Sheet l iti511.

4 Sheets-Sheet 2 INVENTOR W6 ATToRN Y 7x. C. fomfs EJ/Tamm N Filled June 4, 1921 R. C. STOKES ET AL SAND CUTTING AND MIXING MACHINE Q u 0 O 0 o o o April 22, 1924.

-Aprl 22, 1924. 1,491,178

R. C. STOKES ET AL lS'AND CUTTING AND MIXING MACHINE Filed June 4. 1921 4 Sheets-SheecI 5 INVENTORSJ "TEC, S TG KES *E .VJDPDAP ATTORNEY April 22 1924. 1,491,178

R. c. sToKEs ET AL SAND CUTTING AND MIXING MACHINE Filed June 4. 1921 4 Sheets-Sheet 4 INVENTOR R CSToffss'E. IATaFpA N ATTORNEY Patented Apr. 22, 19224.

i' l' lAQLii' PATENT OFFICE...

RUSSELL C. STOKIES AND EDWARD 'V'. JORDAN, OF DOVER, NEW JERSEY, .ASSGNORS TO STORES MANUFACTURING CORPORATION, OF DOVER, NEW JERSEY, A CORPORA- TION 0F DELAW'ARE.

SAND CUTTING AND MIXING MACHINE.

Application filed .Tune 4,

To all who/m t may concern.'

Be it known that we7 RUSSELL C. Sronns and EDWARD V. JORDAN, citizens of the United States, and residents of Dover, in the county oli lt/lorris and State ot New Jersey, have invented certain new and useful improvements in Sand Cutting and' Mixing liiachines, or". which the following is a specification.

This invention relates to motor propelled cutting and mixing machines for 'foundry sand arranged in a ridge upon the floor of a Afoundry by running the machine over the sand ridge and reforming the same in a ridge in the rear of the machine, and it is the primary object of the invention to im prove the construction and arrangement of machinesv of this character to cheapen the cost of construction and at the same time increase the operating eiiiciency of the niachine.

It is a further object of the invention to provide improved driving means for the traction wheels of the machineand the sand mixing and cutting means, said driving means being constructed and arranged whereby the traction wheels may be connected to the driving means to propel the machine and simultaneously therewith operating the sand cutting and mixing means. and whereby the traction wheels and the sand cutting and mixing means may be operated independently ot cach other.

It is another object ot' the invention to provide in a machine ot this character steering wheels adjustable to different angular positions to change the direction of travel ot the machine, and to provide means operative when the steering means are adjusted to one angular position to disconnect one ot the traction wheels trom the driving means, and as the steering wheels are adjusted in an opposite angular direction to disconnect the other traction wheel from the driving means.

A further object of the invention relates to improved means for automatically dis connecting the sand cutting and mixing means from the driving means when said means encounters an obstruction, such as a casting, in the sand pile or ridge to stop the operation of said means.

It is still another object of the invention to provide an improved. friction driving 1921. Serial No. 475,088.

means in machines of this character including a friction driving disk and a pair of friction wheels to co-operate with said disk to operate the traction wheels and sand cutting and mixing means independently of each other, whereby the traction wheels and sand cutting and mixing means may be operated simultaneously or independently of each other, and to provide means to equalize the rictional engagement `of the disk with said friction wheels.

In machines of this character the sand cutting'and mixing means consists of a rotatable drum arranged with means to maintain the sand within predetermined limits laterally of the pile or ridge, and having radially extending fingers betweeny said means to cut and mix the sand, said drum being adjustable into and out o'l operative relation with the sand, and it is a further object of the invention to provide improved means to raise and lower the drum either manually or through the driving means, and to provide an improved mounting for the drum to take up any lateral torsional strains to which the drum maybe subjected during the travel of the machine and the rotation of the drum.

Other objects and adv ntages will hereinafter appear.

In the drawings accompanying and Vtorming a part of this speciiication Figure 1 is a plan view of a sand cutting and mixing machine. partly broken away, with our improved means applied thereto.

Figure 2 is a. side elevation looking at the bottom of Figure'l.

Figure 3 is an end elevation of the sand cutting machine looking at the rear thereof.

Figure 4 is a front elevation ot the sand cutting and mixing drum. y

Figure 5 is a longitudinal sectional view of means to releasably connect the sand cutting and mixing drum with driving means and the means to automatically release the drum when it encounters an obstruction in the travel and rotation thereof.

Figure 6 is an end view looling at the lett of Figurey 5.

Figure 7 is a plan view of the means to releasably connect the traction wheels to the driving means, and showing the connection of said wheels with `the steering wheels whereby to release one the traction wheels as the steering wheels are adjusted in one angular direction and to release the other traction wheel. as the steering wheels are adjusted in an opposite direction.

Figure 8 is a front elevation to show the mounting of the carriage of the machine upon the steering,- wheels and the connecting of the wheels to simultaneously adjust said wheels to the same angular direction.

Figure 9 is a front elevation; and

Figure 10 is a side elevation of means mounted upon the drum carrying sand cutting and mixingfingers.

Figure 11 is a. plan view of one of the connections of the drum to the carriage of the machine.

Figure 12 is a rear elevation of the drum showing in a diagrammatic manner the pesition the drum may assume when eneounten ing and riding:f over an obstruction to prevent lateral torsional strainin` of the drum; and

Figure 13 is a detail view in plan of the means for raising` and .lowering the drinn in the carriage.

Similar characters of reference designe like parts throughoutthe different views the drawings. y

In the embodiment of the invention shown in the drawings a carriage for carrying the operative mechanism is provided con'iprising` a frame (designated in a general way by F) supported at lthe rear by a pair of traction wheels 10, 10 rotatably supported on axles carried at the extremities of diagonal members 1l, 11 of the frame. The forward end of the carriage frame is supported by a pair of steering` wheels 127 12 rotatably carried in forks 18, 18 of posts mounted to rotate on vertical axes in a transverse member 1st,

shown at 15, the forward end of the carriage fran'ie being supported upon said transverse member 14 by a king; holt 15 iu line with the longitudinal axis of the frame. said bolt passiugY through brackets fitted to the tiu'i'isverse member 14; and a transverse nieniliier lil of the carriage frame as clearly shown iu Figure 8. Both of the steeringy wheels are ladapted to be simultaneously adjusted in the same angular direction. as shown in dotted lines in Figure 7, by rotatiup; the wheel carrying forks and to operaA4 tively connect the wheel forks to effect this movement they lare connected by a cable er chain 17 adjustably connected at opposite ends, as by a turn buckle 187 said cable passing around grooved wheels 19 fixed to the post of each of the wheel forks, and movement is imparted to said wheels by a v'manually operated handle 2O connected to the extended end of the post of one of the wheel forks.

The carriage is propelled by suitable mo-Y tive or driving means, such as an electric motor or an internal combustion engine,1 (ine inn; movement thereon, said sha' dicated in a geneal way at M) mounted upon the frame. The motor .is operatively connected to the traction wheels by friction power transmission mechanism con'iprisingl a friction disk 21 lined to a shaft 22 journaled in bearings 23 mounted upon a base la adjustably mounted upon the carriage frame in a manner and for a purpose hereinafter set forth. The disk shaft is connected to the shaft of the driving' means or motor by sprocket chain 25 inissine` around sprocket wheel 26 lined to the shaft of the motor :nul a sprocket whexl 27 fined to the disk shaft. its wiieel. 28 to have frictional {ings-gen'ient with the friction disk is mounted on a shaft 29 to rotate therewith and have slid nalled in bearings upon the. wheel 28 is adjusted on the shaft and diall.)7 of the face of the disk by a pivoted lever 30 arranged to engage an annular groove 31 in the hub of thev wheel. The shaft Q9 is connected to a driving` shaft through a standard change speed and .-:ev rsing;` gear mechanism (designated in a general way by (it), by means of a sprocket chain 23 passing around a sprocket 34e on the driving shaft of the mecianism and a sprocket wheel on the shaft The traction wheels are o irieratively connected to the driving` shaft 32 one independently of the other by a pair of clutches (Figure 7), one member 36, 3G of each of the clutches being loosely mounted A connected to the traction wheels by sprocket chains 37, 37 (Finure 1) passing around sprocket wheels 38 connected to said clutch members and sprocket wheels 39 rotatable with the traction wheels. The other members 410, 40 of the clutches are mounted upon the shaft to rotate there with und have slidingT movement thereon and normally urged by sprines ll to position to operatively engage the cluch nu nbers 36, 35 and connect the wheels to the driving shaft To facilitate the turning of corners means are provided to automatically disconnect he traction wheel from 'the driving` shaft- 32 which is at the inner side of the machine. For this purpose chains or cables d2 consistingof adjustably connected sections are connected at one end to the posts of the respective steering wheel for 'cs 13, or to drums mounted upon said post, to be wound upon and paid oil' from said post by the antnular adjustment of the steering wheels. The other ends of the cables connected to one arm of bell crank levers i-.3y l-3 pivotally supported upon the frame, the other arms of the levers being;` arranged to engage annular grooves in the hubs of the clutch members 40, 420. It will be obvious that should the steering` wheels be adjusted to the dotted line position shown in Figure 7 that the upon the shaft and Een 'tion wheel l() from the driving shaft 82.

As the steering wheels are adjusted to direct the machine along a straight course the clutch member 4() is released and again thrown into operative engagement with the clutch member 86 by its spring 41. Should the steering wheels be adjuster. to angular position reverse to that shown in dotted lines in Figure 7 the clutch member 40 will be released in a manner similar to the clutch member 49.

To y cut and mix the sand during the travel of the carriage a sand cutting and mixing drum is rotatably mounted in the carriage, said ldrum comprising a pair of heads 44 fixed in spaced relation upon a` shaft 45 and connected by circumferentially disposed angle iron bars 46. The drum shaft 45 is rotatably mounted' in a pair of angle brackets 47 adjustably secured at one end to arms 48 pivotally supported by brackets 49 fixed to the frame of the car'- riage, the drum being supported by wheels or rollers 50 rotatably carried by arms 5l adju-.stably connected to the angle brackets 47. The ydrum is provided at opposite ends with rigid helical blades 52 extending from the ends of the drum inward. 52 during ther rotation of the drum operate to move and maintain t-he sand in a ridge toward the center of the drum,

To cut and mix the sand a plurality of series of fingers 53 are provided circumferentially disposed around the drum within the blades 52. These fingers are mounted in bars 54 (Figures 9 and 10) pivotally mounted upon the drum bars 46 by bolts 56 (Figiu'e passingl through perforations in lugs at opposite ends of the finger bars and lugs 57 fixed to the drum bars 46. The lfinger bars lare normally yieldingly urged in a direction with the rotation of the drum as indicated by the arrow in Figure 8, to position to extend radially from the drum by 'springs 58 connected at one end to a depending lug 59 and the other ends adjustably connected to the drum bars 46. The finger carrying bars are mounted upon the drum so that the fingers of one bar will be in staggered relation to the fingers of adjacent bars as clearly shown in Figure 4.

The drum is operatively connected to the driving means or motor M to be driven thereby through a friction wheel 6() mounted on4 a shaft 6l journalled upon the carriage frame co-axially with the shaft 29, said wheel having sliding movement on said shaft and rotatable therewith. The friction wheel is adapted to -frictionally engage the rlhese blades friction disk 2l at the side of its axis of rotation opposite to the disk 28. The friction wheel GO is adjustable upon its shaft radially of the friction disk to vary the speed of rotation thereof by a pivoted lever 62 arranged to engage an angular groove 68 in the hub of the friction wheel, i The movement of the shaft 61 is transmitted to a shaft 64 by a sprocket chain 65 passing around a sprocket wheel 66 on shaft 51 and a sprocket wheel 67 on shaft 64, and the movement of the latter shaft is transmitted to the drum by a sprocket chain 68 passing around a sprocket wheel 69 on shaft. 64 and a sprocket wheel 70 loose on the drum shaft 45. (Figure rllhe sprocket wheel 70 releasably connected to the drum shaft by clutching mechanism consisting of a head 7l fixed on the drum shaft and a head 72 mounted on the drum shaft. to rotate there# with and have sliding movement thereon, said head carrying pins 78 slidably enga-ging in perforations in the head 7l and in recesses in the hub of the sprocket 70. As stated the drum is adapted to be automatically released from the driving means by the sand cutting and mixing fingers encountering an obstruction, such as a casting, in the sand. For this purpose, means are provided to uncouple the sprocket wheel 70 from the drum shaft, comprising a yoke 74 pivotally connected to one end of one of a pair of toggle links 75 pivotally carried by collar 7 6 fixed to the drum shaft, the other ends of the links being pivotally connected to a pair of links 77 pivotally connected at the opposite ends to the heads 72, as at 78. rlhe yoke 74 is operatively `connected to one of the finger carrying bars 54 by a rod 7 9 hingedly connected at one end to a finger carrying bar, as 80 (Figures 2, 6 and 7 the opposite end slidably engaging a socket in a lug 8l of the kyoke and the` inward movement limited by a collar 82 fixed to the rod. As the finger carrying bar to which the rod 79 is connected encounters an obstruction and is moved in the action of a spring 50, the rod through its connect-ion with the toggle linkage 75, 77 will break the toggle moving the same to the dotted line position shown in Figure 5 and in co-operation with springs 83 will move the pin carrying head 72 against the action of an equalizing spring '84 to disconnect the pins 73 from the hub of sprock et 70. As soon as the obstruction is removed the drum may again be coupled to thedriving sprocket 70 by manually forcing the toggle members 7 5, 77 into normal position shown in full'lines in Figure 5.

The friction wheel 69 may be adjusted on its shafts to throw wheel into and out of frictional engagement with the driving I equalize the pressure of the disk 21 on the friction wheels, or either one of said wheels, the disk suppoi oas-o 2st is adjustably mounted upon the carriage frame. For this purpose the base is a 'anged with anguor curved slots iaiure 1). and t 8.3 k l ne base is secured to the trame by bolts 86 pass ing through said slots and en ging a fixed part of 'the frame. To equalize and take up lateral thrust of the disk the base at one side of the anis of the disk shaft engages an adjustable abutment in the to of a set screw 87, and an adjustable abut1 ient in ne forni a setscrew 88 at the opiriosite side of the anis of the disk shaft a spi-ing 89 interposed between said abutn nnt and the side of the disk supporting oase. This spring 89 operates Yto exert greater frictional stress against the wheel 60 when both of the friction wheels are in engagement with the disk.

To raise and lower the drum a pair of cables 90 are secured at one end to the drum, said cables passing over pulleys 91 carried by standards 92 of the frame with the opposite ends connected to drums 93 fixed to a shaft 94tliouriialled upon the franie work. By rotating the shaft 9din one direction it will be obvious that the cables will be wound upon the drums therebyY raising the sand mining druin and when the shaft is rotated in an opposite direction the cables are paid off from the drums 93 and the mining drum is lowered with the drum supporting wheels 50 to engage the ground or floor. To lower and raise the mixing drum a worin wheel 95 is fined upon the shaft 94e with which a worm 9G meshes said worin being carried by a shaft 97 rotatably mounted upon the frame and extending to the front of the machine and at which end it has a crank handle 98 fixed thereto whereby the shaft may be normally rotated. rlhe meshing of the worm 9G i ith the worm wheel in tains 'the mining drum in adjusted `position. The mining drum may also be raised or lowered by the driving means. For this purpose a pair of opposite friction cone faces .99#99 (Figure are' adapted to be thrown into frictional engagement with a similarly formed friction cone face 100 by imparting longitudinal movement to the shaft 97, said shaft being mounted in a thrust boi; to perinit of such longitudinal movement. rllie driving face 100 is fined to a shaft 101 journalled upon the frame and is driven from the shaft 29 by a sprocket chain 102 passing around a sprocket wheel 103 on shaft 29 and a sprocket wheel 104i fixed to the shaft 101.

To take up any torsional strain which may be imparted to the sand mining drum during the rotating thereof and as it is moved over the sand pile during the propellingof the machine, as by the drum supporting wheels 50 riding over an obstruction, the

1% meines drum supporting arms 4S are constructed of a pair of pivotally connected sections, the one section being bent laterally, as at 105 (Figure 11) and the other section of the N s e8 beingv of ll-shape and whereby the arm is pivotally connected to the supporting bracket 49, the two sections being connected by a rivet 106 passing through the connecting portion of the section 48 and the portion 105 whereby the arm sections may have iotitive movement relative to each other. Should the drum ride over an obstruction as shown in diagrammatic manner in Figure 12 the arin sections will be adjusted substantially to the portion as indicated iii said Figure 12.

To keep the sand down and prevent the saine from being thrown upward by the rotation of the mining drum a guard 110 is tei-iai bent to circular shape as shown in Figure 2. rlhis guard or shield is supported by radius rods 111 connected to the drum support l? and the opposite ends connected to and supporting thev shield adjacent opposite corners, the opposite corners of the shield being connected to the arms 48, as shown at 112. By this arrangement the guard is mounted to be raised and lowered with the drum.

lflaving thus described our invention we fflaiii t 1. in a sand cutting and mixing machine;

mean ro couple the drum to the driving means, one of said clutch members having movement :i ,l endently of the drum and operatively connected to the driving means, and the otlcr clutch member rotatable with and having sliding movement axially of the drum; a spring to normally urge said latter clutch member out of operative connection with the other clutch member; means to normalmaintain he sliding clutch member in operative engagement with the other clutch me iber against the action of the spring; und means operative by a finger carrying bar to uncouple the clutch when the fingers of said bail encounters 'an obstruction in the rotation of tee drum; comprising a toggle link connection, one link of the toggie having a connection with the sliding clutch member the other pivotally provided consisting of a sheet of ina- "ff tl t) mounted upon the axle of the drum, and an actuator connected to said latter link and operative by a nger carrying bar as it encounters an obstruction to break the toggle for the purpose specified.

ln a sand cutting and mixing machine, a carriage including a pair or traction wheels; a sand cutting and mixing drum rotatably mounted in the carriage; driving means for the traction wheels and drum including a friction disk; a friction wheel to co-operate with said disk operatively connected to .the traction wheels; a second friet-ion wheel to co-operate with the disk and operatively connected to the drum; and an adjustable support for said friction disk, comprising a bearing sup-- porting base arranged with slots, securing means to engage in said slots and secured in a lined part of the carriage to mount the bearing base thereon, a pair of set screws adjustably mounted on the carriage at opposite sides of the bearing base7 one of said screws being adapted to engage the base and the other a spring interposed between the base and set screw for the purpose specified.

3. In a sand cutting and mixing machine, a carriage; a sand cutting and mixing drum; a pair of arms pivotally supported by the carriage and rotatably carrying the drum; lriving means for the drum; and means to raise and lower said drum, comprising a rotatable shaft having a worm wheel thereon and a pair of drums mounted thereon, a pair of cables one end of the cables being connected to each of the drum carrying arms, and the other ends connected to the shaft drums to be wound upon and paid olf from said drums by the rotation of the shaft, a shaft having a worm to mesh with the worm wheel, said latter shaft having a crank handle, and means to operatively connect the same to the driving means to raise and lower the cutting drum either manually or by the driving means.

la ln a sand cutting and mixing machine, a carriage; a sand cutting and mixing drum; a pair of arms pivotally supported by the carriage and rotatably carrying the drum; driving means for the drum; and means to raise and lower said drum, comprising a rotatable shaft having a worm wheel thereon and a pair of drums mounted thereon, a pair of cables one end of the cables being connected to each of the drum carrying arms, and the other ends connected to the shaft drums to be wound `upon and paid oif from said drums by the rotation of the shaft, shaft having a worm to mesh with the worm wiieel, a friction wheel operatively connected to the driving means, and a pair of friction wheels on the worm shaft either one of which is adapted to be' brought into operative engagement with the friction driving wheel for the purpose specified.

5. ln a sand cutting and mixing machine, a carriage, a sand cutting and mixing drum, and a pair of arms pivotally supported by the carriage and rotatably carrying said drum, said arms being adjustable and arranged to take up lateral torsional. strains to which the drumy may be sulijected.

6. lin sand cutting and mixing' machine. a carriage, a sand cutting and mixing drum, and a pair of arms pivotally supported by the carriage and rotatably carrying said drum each of said arms comprising sections to have adjustment on an axis transverse vto the aXis of rotation of the drum for the purpose specified.

7. ln asand cutting and mixing machine, a traction carriage7 a sand mixing and cutting drum, means to releasably support said drum and mount the same in the carriage to be raised and lowered, and a guard to extend around the upper portion of the drum and adapted to participate in the raising and lowering movements of the drum.

Signed at Dover, in the county of Morris and State of New Jersey, this 21st day of lt/lay, 1921.

RUSSELL C. 'STOKES EDWARD V. JORDAN.

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