US1071848A - Concrete-mixer. - Google Patents

Description

W. D? WISE.

CONCRETE MIXER.

APPLICATION FILED NOV. 2,1911. RENEWED JAN. 28,1913. 1 W? lfi i w Patented Sept. 2, 1913.

4 SHEETS-SHEET l.

V145 K may.

W. D. WISE.

CONCRETE MIXER.

APPLICATION FILED NOV. 2, 1911. RENEWED JAN. 2a, 1913.

Patented Sept. 2, 1913.

4 B TS-SHEET 2.

W. D. WISE.

OONORETE MIXER.

APPLICATION FILED 110v. 2, 1911. RENEWED 1.111. 2a, 1913.

1 071318. Patented Sept. 2, 1913.

4 SHEETS-SHEET 3.

A Mb 1 W. D. WISE.

CONCRETE MIXER.

APPLICATION FILED NOV. 2, 1911. RENEWED JAN. 2a, 1013.

Patented Sept. 2, 1913 4 SHBETS-SHEBT 4.

WILLIAM D. WISE, OF FARGO, NORTH-DAKOTA.

,CONCRETE-MIXER.

tori-s48.

Application filed November 2, 1911, Serial No. 658,188.

To all whom it may concern Be it known that I, lVILLIAM lld/VISE, citizen of the United States, reslding at Fargo, in the county of Cass and State of I North Dakota, have invented certain new and useful Improvements in Concrete-Mixers, of which the following is a specification.

This invention relates to concrete mixers and has for its object the provision of a strong, durable and thoroughly eflicientmachine of this character in which sand, gravel and cement are mechanically fed into a rotating drum to effect the mixing thereof, means being provided for spraying the materials during the mixing operation, and means for automatically discharging the contents of the drum Without checking or otherwise interfering with the operation of the feeding device.

A further object is to provide a mixing machine including an upwardly inclined trough having co-acting screw conveyers mounted for rotation therein and arranged to discharge sand and gravel into the drum, said trough having its upper end cut-away to form a deflector, the latter being arranged in the path of the cement and adapted to direct the materialson opposite sides of the mixin drum.

A further object is to provide the mixing drum with oppositely disposed discharge spouts having gates or closures pivotally mounted thereon and movable to open and closed positions at predetermined intervals. A further object is to provide means arrangedon one side of the machine for auto matically opening the gates, and means dis posed on the other side of the machine for automatically-closing said gates.

A further object is to provide a novel system of levers for operating the gates and preventing accidental opening movement of said gates when charging the spouts.

A'still further object of the invention is generally to improve this class of machines so as to increase their utility, durabi1ity and efficiency.

Further objects and advantages will appear in the followin description, it being understood that various changes in form, proportions and minor details of construction may be resorted to within the scope of the. appended claims.

For a full understanding'ofthe invention" Specification of Letters Patent.

Patented Sept. 2, 1913.

Renewed January 28, 1913. Serial No. 744,787.

and the merits thereof, reference is to he had to the following description and accompanying drawings, in which:

Figure 1 is a side elevation of a concrete mixing machine constructed in accordance with my invention; Fig. 2 is a longitudinal sectional view; Fig. 3 is a front elevation;

Fig. 4: is a transverse sectional view taken on the line4-4= of Fig. 1 and looking in the ;direction of the rear end of the machine; Fig. 5 is a perspective view of one of the discharge spouts, showing the means for opening the pivoted ate or closure to perwit the discharge of the contents of said spout; Fig. 6 is a s milar view, showing the means for closing the gate; Fig. 7 is a verticnl sectional view taken on the line 77 of Fig. 2; Fig. 8 is a detail perspective view of the upper portion of the feeding trough, showing the construction of the deflector and bearings for the upper ends of the screw conveyors; Fig. 9 is a perspective view of the hopper partition detached; Fi 10 is a detail perspective view, showing the means for mounting the discharge chute on the truck.

Corresponding and like parts are referred to in the following dcscri tion and indicated in all the views of the drawings by the same reference characters.

The improved mixing machine is preferably mounted on a truck'5 including spaced channel bars having front and rear axles (5 and 7 secured thereto and on which are journaled ground wheels 8 so as to permit the machine to be readily transported from place to place.

Mounted for rotation between the side bars of the truck frame, is a mixing drum 9, the rear end of which is open and provided with a horizontally disposed hollow casting 10 journaled in a supporting bracket 11, as shown. Arranged at the front end of the mixing drum 9, is a substantially conical shaped casing 12, the inner end of which is flared and projectswithin the drum, while the outer end thereof is reduced and extended a short distance in advance of said drum. The front end of the drum is preferably closed by an annular plate 01" ring 1 1, which latter serves to. center the casing within the drum and alsoto cause the drum and easing to rotate in unison. The rear head 15 terminates short of-thercastmg 10 and' is provided with an inwardly extending" substantially conical shaped flange 16 disposed concentric with the casting 10 and which serves to prevent the escape of concrete through the rear end of the drum during the mixingoperation.

Mounted on the front end of the frame, is an upwardly inclined trough 17 having spaced co-a'cting right and left hand screw conveyers 18 mounted for rotation therein and adapted to feed sand and gravel into the casing 12. The upper portion of the casing or trough 17 is cut-away and the metal at said cut-away portion bent upwardly to produce spaced upstanding flanges 19 to which is bolted, riveted or otherwise rigidly secured a hopper 20 adapted to receive sand and gravel. Arranged within the hopper 20, is a partition 21 which serves to divide the sand and gravel, said partition being provided with laterally extending slotted arms 22 so as to permit the partition to be adjusted laterally within the hopper and thus control the amount of sand and gravel fed to the screw conveyers.

Secured to or formed integral with the front end of the truck, is a casting 23 having bearings 24 in which are journaled the lower ends of the conveyer shafts "25, the

latter bein provided with intermeshing gear Wheels 26 or turning the conveyers in opposite directions. That portion of the trough 17 between the casting 23 and hopper 20, is preferably continuous, as indicated at 27, so as to prevent the escape of sand and gravel from the hopper at this point. A. brush 28 is preferably arranged above the screw conveyers at the upper end of the hopper 20 for the purpose of leveling the sand and gravel within thetrough 17 as said materials are fed upwardly for delivery to the mixing drum.

Disposed above the trough 17, is a cement receiving hopper 29, the lower end of which terminates in a cylindrical casing 30, one end of which opens into the conical casing 12 at a point above the conveyors l8. Journaled in the casing 30, is a screw conveyer 31, one end ofthe shaft of which extends through said casing and is provided with a sprocket wheel 32. It will here be noted that the inner end of the trough 17 is cutaway to produce oppositely inclined wings 33, the latter constituting deflectors and serving to divide and direct the cement from the hopper 29 downwardly in separate paths and deposit said cement at diametrically opposite points within the casing 12, thus insuring a thorough blending of the materials to be mixed. Secured to the upper or free end of the deflector 33, is a transverse bar 34 having terminal bearings 35 adapted to receive the adjacent ends of the conveyer shafts 25. Thus it will be seen that when machine is iii operation, sand and gravel, in the desired proportions, will be taken up by the screw conveyers 18 and discharged into the casing 12, while at the same time the cement discharged by the conveyer 31 will fall upon the common apex or ridge 36 of sills of the truck, is an arched frame 37 preferably formed of spaced plates, L-shaped in cross section and connected by bolts or similar fastening devices. Mounted for rotation between the plates of the arched frame 37,

are rollers 38, which latter bear against an annular track or smooth portion 39 formed on a collar or sleeve 40 secured to the reduced end of the casing 12, as shown. The collar 40 is also provided with peripheral teeth 41 which mesh with a gear pinion 42 secured to a driving shaft 48, there being a clutch 44 mounted on the driving shaft for the purpose of moving the pinion 42 into and out of mesh with the teeth 41.

A sprocket wheel 45 is mounted on the driving shaft 43 and connected through the medium of a sprocket chain 46 with the sprocket Wheel 32 so that motion may be transmitted from the drum through. the medium of the driving shaft 43 to the conveyer 31 for the urpose of feeding cement to the mixing rum, the proportion of cement fed to the drum being regulated by the size of the sprocket wheel 32.

Keyed or otherwise secured to the outer end of the driving shaft 43, is a bevel pinion 47, which meshes with a corresponding bevel pinion 48 secured to the adjacent end of a stub shaft 49, the opposite end of said stub shaft being extended through the casting 23 and provided with a gear wheel 50. The gear wheel 50 meshes with the adjacent gear wheel 26 so that when the driving shaft 43 is rotated, motion will be transmitted to the conveyors 18 to rotate the latter in opposite directions and thus elevate the sand and gravel in the hopper 27.

Extending through the bore of the casting 10, is a pipe or conductor 51, the inner end of which is provided with a nozzle 52 for spraying water on the materials as the latter are discharged into the conical casing 12. The outer end of the pipe or conductor 51 is extended laterally to a point beyond one side of the truck frame and connected with a flexible hose 53 leading to a tank or other source of water supply, the flow of water from the tank through the conductor 51 to the discharge nozzle 52 being regulated by a valve 54.

Mounted on the truck at the rear of the drum 9, is an engine or other motor 55, the driving shaft of which is provided with a pulley 56 over which extends a belt leading to a relatively large pulley 57 mounted on a horizontal shaft 58. One end of the shaft 58, is provided with a clutch 59 and hand controlled lever 60, while the other end thereof is provided with a gear pinion 61 which meshes with a gear 62 secured to or formed integral with the mixing drum 9.

Opcratively connected with the clutch 44, is a lever 63 having its intermediate portion pivotally mounted at (34 on a suitable bracket or support and its lower end piw otally connected with a rod 65, which latter extends to the rear end of the truck and is connected with a hand lever 66 so that by operating said hand lever, the pinion 42 may be moved out of engagement with the teeth 41 and thus stop the feeding device without affecting the mixing drum. This same result may be accomplished however, by merely operating the lever 63.

Bolted or otherwise rigidly secured to the mixing drum 9, are oppositely disposed discharge spouts 67 adapted to receive the concrete after the latter has been mixed and discharge said concrete at predetermined intervals. Each discharge spout is provided with a transverse pin 68, to which is rigidly secured a gate or closure 69, there being a guard plate 70 arranged at the mouth of each discharge spout for the purpose of directing the material outwardly from the drum when discharging the cement.

One end of each pin 68 is extended laterally beyond the adjacent ear or bearing 71 to form a support for an arm 72, the latter being preferably formed of a single piece of metal bent upon itself and clamped in position on the extended end of the pin 68, by a bolt or similar fastening device 73. Pivotally connected with the arm 72, is one end of an angularly disposed link 74, the opposite end of which is pivotally connected at 75 to the adjacent end of a bell crank lever 76. The bell crank lever 76 may be cast or otherwise formed of a single piece of metal or may be made in two sections welded together as desired, it being preferred to make the bell crank lever in two sections, one of which is clamped or otherwise rigidly secured to a pin or stud 77. The pin or stud 77 is journaled in a boss 78 extending laterally from one side of the adjacent discharge spout 67, said pin being provided with an annular groove 79 adapted to receive a bolt 80, thus permitting the pin 77 to rotate in the boss 78, while at the same t ime preventing accidental withdra 'al of said pin.

()ne arm of each bell crank lever 76 is provided with a terminal roller 81 adapted to engage a trip device 82 for the purpose of openlng the gates 69 when it IS desired to discharge the contents of the spouts 67. The trip device comprises a shank 83 preferably formed of vertically adjustable sections, one of which is rigidly secured to a transverse shaft 84, while the other is pro vided with a horizontally disposed plate or track terminating in an upwardly inclined portion 85. The shaft 84 is journaled in suitable bearings 86 secured to the side sills of the truck frame and is provided with oppositely disposed levers 87 and 88, one of which constitutes. a hand lever, by tilting which the trip device may be moved into the path of the rollers 81 when it is desired to discharge the contents of the mixing drum.

Pivotally connected with the lever 88, is one end of a link 89, the opposite end of which is operatively connected with a bell crank lever 90 mounted on the truck frame 5. Secured to the short arm of the bell crank lever 90, is a rod 91, which in turn is pivotally connected with the lower end of a hand lever 92. Thus it will be seen that by tilting the hand lever 87, the trip device may be actuated to engage the rollers of the pivoted gates (59 from one side of the machine, while by actuating the lever 92, the trip device may be operated to engage the rollers 81 from the other side of the machine.

Secured in any suitable manner to one side of the membersor sills of the truck frame, are spaced laterally inclined rods 93 connected by a transverse bar 94, which bar is provided with terminal eyes 947 which receive the rods 93. Interposed between the rods 93, is a discharge chute 96 having spaced hooks 97 secured to the bottom thereof and fitting over the transverse bar 94, there being suitable set screws 98 extending through the eyes and engaging the rods 93 for holding the bar 9-L in diil'crent positions of adjustment. By such a construc tion, the chute 96 may be adjusted vertically of the machine and tilted laterally so as to direct the cement entering said chute to any desired point 'or into any suitable receptacle. Secured to the truck frame at a point diametrically opposite the chute 99, is a stationary track 99 having its free end extended laterally beyond the lines of the mixing drum and inclined upwardly in the path of the rollers 81. said track, by engagement with the rollers 81, serving to automatically close the gates (39 as the drum is rotated.

The discharge spouts (57 are so arranged on the mixing drum that when the spouts reach the bottom of the drum, the cement in said drum will fill the spouts, and as the drum revolves and the rollers 81 on said spouts come in contact with the trip device, the gates 69 will be moved to open position and thus permit the discharge of the contents of the spouts, the gates being subsequently closed by the track 99 so as to permit the discharge spouts to be again filled.

It will here be noted that the arrangement of the arms 72, bell crank levers 7 6 and con necting links 74, is such that when the gates 69 are in closed position, said links form in effect a lock so as to prevent accidental opening movement of the gates during the filling of the discharge spouts, this locking action being due to the relative position of the pivot pins and tothe shape of the links 74, as best shown in Fig. 4 of the drawings.

Secured to the apex of each connecting link 74, is one end of a coil spring 100', the =59 posits end of which is secured in any suita is manner to the mixing drum. The tension of the springs 100 is such that when the gates 69 are in closed position, said springs serve to assist in preventing opening movement thereof. In order to prevent any lateral movement of the mixing drum during the rotation thereof, there is provided a collar 101, which collar is secured to the casting 10 and bears against the bracket 11.

In operation, .the hopper is filled or partially filled with sand and gravel and cement introduced within the hopper 29,

after which the engine is. started, motion being transmitted to the several partsin the manner before described. As the sand and gravel is discharged into the conical casing 12, the cement in the hopper 29 will be divided by the ridge 36 of the deflectors 33 and deposited upon .the sand and gravel within the casin 12 on opposite sides therethe materials being simultaneously sprayed with liquid by the nozzle 52. Ow-

ing to the conical shape of the casing, the

materials thus .treated 'will be directed downwardly into the mixing drum and thoroughly blended without the employ-- ment of bafltles and similar agitating devices, although if desired, one or more battles may be disposed within the drum to 'assist. in mixing the materials. As .the

drum rotates, the cement in the latter will successively fill the discharge spouts 67 and as said discharge spouts a preach the tri device, the gates of the disc large spouts will be automatically opened-and the cement discharged into the chute 96 for delivery into a sultable receptacle. After the contents of one spout has been discharged,'the gate of said spout will be automatically shut by the closing device 99, the other spout, in the mean time, having been filled with concrete from the drum and (presented to the trip device to be discharge of its contents.

It will of course be understood that the drum may be rotated for any desiredperiod without-opening the gates, the opening movement of the gatesbeing accomplished,

. lenses 4 only when the trip device is thrown into the path of movement of the rollers 81 when the gates will be automatically moved tothe open position as described.

The position of the closing device or track 99 is such that when both gates are in closed position, the actuating rollers 81- of said gates will clear the track or closing device, as will be apparent from Fig. 4 of the drawings. 1 7

Attention is here called to the fact that- -the filling and discharge of the cement in the spouts 67 is effected without checking or otherwise interfering with the sand or cement feedin mechanism, thus permitting the mixture 0 a batch of cement, while the receptacle containing the previously'mixed batch is being removed, It will also be noted that the materials are continuously and mechanically fed to the drum, and that the manner of depositing the several mate- -rials in the mixin drum, produces a uniform blending of t e parts with very little agitation, thus efiecting a saving in power and consequently increasing the capacity, as well as the efliciency of the machine.

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

1. Ina machine of the class described, the

combination of a rotary mixing drum, a discharge spout fixed to the drum and com municating with the interior of the same, a gate forming a closure for the discharge spent and moving constantly with the drum,

-means for o enin the ate and other means for automatically closing the gate, the drum being disposed between the means for opening the gate and the means for closing the same. 1 r

2; In a machine oi the class described, the combination of a rotary mixing drum, a discharge spout communlcating with the in 'terior of the drum, a gate forming a closure for the discharge spout, means adapted to be projected into the path of the gate for opening said gate to-permit the discharge of. the contents of the spout, and stationary means forautomatically closing thegate 1 during the rotation of'the drum, the drum being disposed between the means for opening the-gate and the means for. closing the same. I x

3. In a machine of the class described, the combination of a rotary mixing drum, a discharge spout carried by and communicating with the interior of the drum, a gate forming a closure for the discharge spout, alever operatively connected with the gate, a trip device adapted to be projected into the path of the lever for opening the gate to permitithe discharge of the contents .ot-the spout, and means adapted to engage the said. .lever for automatically closingv said gate, the drumbeing arranged between-the Monaco trip device and the means for closing the gate.

t. In a machine of the class described, a rotary mixing drum, a discharge spout carried' by and movable with the drum, a gate forming a closure for the discharge spout, a lever mounted on the spout and opera tively connected with the gate, an oscillating trip device mounted at one side of the drum, means-for moving the trip device into the path oi" the lever tor opening the L mic, and stationary means "for automatically closing the gate, the drum being disposed between the trip device and the means for l f t ate.

no or the class described, a

. v discharge spout carwith the in- M ring a closure spent, a lever opei'atively cl wnzi 1c gate, a transverse shalit disposed one end of the drum, a trip device carried by the shaft and movable there by into the path of the lever for opening the gate, means connected with. the shaft for oscillating the latter, and a track arranged.

on the opposite side of the machine from the trip device and disposed in the path of the lever for automatically closing the gate.

6. In a machine of the class described, a rotary mixing drum, a discharge spout carried by and communicating with the interior of the drum, a gate forming a closure for the discharge spout, a bell crank lever.

pivotally mounted on the discharge spout and provided with a roller, a link forming a pivotal connection between the bell crank lever and gate, and a trip device movable into the path of and adapted to engage the.

roller on the bell crank lever -for opening the gate to permit the discharge of the contents oi the spout. I

'l. In a machine of the class described,a rotar mining drum, a discharge spout carried oy and communicating with the interior of the drum, a gate plvotally mounted on the discharge spout and having its pivot pin extended lateral] beyond said spout, an arm rigidly secure to the extended end or the pivot pin, a bel'l'crank lever pivotally mounted on the spout, a link forming a pivotal connection between one arm of the lever and'the arm of the pivot pin, a trip device movable into the path of the other arm of the bell crank lever for opening the gate, and means for automatically closing the gate. 8. In a machine of the class described, a

rotary mixing drum, a discharge spout 'movable with said drum and communicating with the interior thereof, a pivoted gate forming a closure for the discharge spout, an arm rigidly secured to one end of the gate, a bell crank lever pivotally mounted on the spout and provided with a roller, a link forming a pivotal connection between the bell crank lever and arm, a spring operativoly connected with the. link, and a trip device movable into the path of the roller for opening. the gate.

9. in a machine of the class described, a rotary mixing drum, a discharge spout movable with said drum and communicating with the interior thereof, a pivoted gate forming a closure for the spout, a boss extending laterally lirom said spout, a pin journalcd in the boss, a bell crank lever carried by the pin and provided with a roller, an army rigidly secured to the pivot pin of the gate, an angular link forming a pivotal cormection between the arm and bell cranlc lever, a trip device ino'vableinto the path of the roller for opening the gate, and means for automatically closing sald gate.

10. in; a machine of the class described, a rotary mixin drum, oppositely disposed spouts carried by the drum and communieating with the interior thereof, gates pivotall-y mounted on the spouts and serving to normally close the latter, a bell crank lever opcratively connected with each gate, an osclllating trip device movable into the path of the bell crank levers for opening the gates, and a stationary closing device arranged in the path of said bell crank levers for automatically closin said gates.

11. In a machine of t c class described, a rotary mixing drum having a plurality of discharge spouts communicating with the interior thereof, pivoted gates forming closures for, the discharge spouts, operating mechanism connected with each gate, a trip device dis osed on one side of the machine and movable into the path of the operating mechanism for movin the gates to open position, and a closing 'evice arranged on the other side of the machine and ad ted to engage the operating mechanism or antomatically closing the gates.

12. In a machine of the class described, a rotary mixing drum, a discharge spout carried by and movable with said drum, n pivoted gate forming a closure for the discharge spout, operating mechanism connected with the gate, an oscillating trip de vice movable into the path of the operating mechanism for opening the gate, means for automatically closing the gate, and means connected with the trip device and operable from either side of the machine for moving the trip device into and out of the path of the gate operating mechanism.

13. In a machine of the class described, a rotary mixing drum, spaced discharge spouts carried by and communicating with the interior of the drum, :1 pivoted gate forming a closure for each disohar 'e spout, a guard plate disposed at the mout of each spout, a system of levers forming a pivotal connection between each spout and the adjament gate and including a roller, a trip device movable'into the path of the rollers for opening the gates, and a stationary track also arranged in the path of the rollers for automatically closing the gates.

14. In a .machine of the class described, a rotary mixing drum, a discharge spout carried by and communicating with the interior of the drum, a pivoted gate forming a closure for the discharge spout, va bell crank lever pivotally mounted on the spout, a link forming a pivotal connection between the bell crank lever and gate, a trip device movable into the path of the bell crank lever for opening the gate, means for automatically closing said gate, and means for retaining the gate in closed position during the filling of the discharge spout.

15. In a machine of the class described, a rotary mixing drum, a cone shaped casing carried by and extending within the drum, means for spraying materials fed into the casing, a discharge spout communicating with the interior of the drum, a pivoted gate forming a closure forthe discharge spout, operating mechanismconnected with the gate and including a roller, a trip device arranged on one side of the machine and movable into the path of and adapted to engage the roller for opening the gate, and means arranged on the other side of the machine and adapted to engage said roller for automatically closing the gate. a

16. In a machine of the class described,

I a supporting frame, a mixing drum mounted for rotation on the frame, a tapered casing secured in the inlet end of the drum and having its inner end projecting within the drum, a head interposed-between the casing and said drum, a second head arranged at the rear end of the drum, a conical shaped plate secured to the rear head, and means extending through the rear end of the drum for spraying. materials fed into the casing during the mixing operation.

17 In a machine of the class described, a supporting frame, a mixing drum mounted for rotation onthe frame and provided with a gear wheel, a driving shaft having a pinion meshing with the gear wheel for rotating the drum, a tapered casing extending into and forming a part of the drum at the inlet end thereof, means for mechanically feeding materials into the casing, means for spraying the materials within the ,casing, means for rotating the driving shaft,

and means for transmitting motion from the drum to the feeding device.

18. In a machine of the class described, a supporting frame, a mixing drum mounted for rotation on the frame, a tapered casing extending into and forming a part of the drum, a casting secured to the casing and provided with gear teeth, coacting conveyeis discharging into the casing and provided with intermeshinggear wheel's, a stub shaft having one end thereof provided with a gear meshing with the adjacent gear wheel and its other end provided with a bevel pinion, a driving shaft having one end thereof provided with a pinion engaging" the teeth on the casting'and its other end provided with a bevel pinion meshing with the adjacent bevel pinion, and means for rotating the drum.

19. In a machine of the class described, a

supporting frame, a mixing drum mounted for rotation on the frame, an arched frame secured to the supporting frame, a tapered casing projecting within the drum, a casting secured to the casing and having peripheral teeth and a smooth portion, antifriction rollers journaled on the arch frame and engaging the smooth portion of the casing, a mechanical feeding device for discharging materials into the small end of the casing, and means operable by engagement with the teeth on the casting for actuating the feeding device.

20. In a machine of the class described, a rotary mixing drum having a discharge spout, a gateforming a closure for the discharge spout, operating mechanism connect ed with the gate, means movable intothe path of the operating mechanism for actuating the latter to open the gate, a discharge chute disposed adjacent said means and adapted to receive the materials "from the spout, and a closing device for automatically closing the gate, the drum being disposed between said closing device and said means for opening the gate.

21. In a machine of the class described, a supporting frame, a mixing drum mounted for rotation. on the frame and provided with spaced discharge spouts, a pivoted gate forming aclosure for each discharge spout, operating mechanism connected with each gate, atransverse shaft journaled on the frame and provided with oppositely disposed arms, a trip device carried by the shaft and arranged near one of the arms, a

bell crank lever connected with the other arm, and an operating lever connected with the bell crank lever for oscillating the shaft to move the trip device into and out ofthe path of the gate operating mechanism.

22. In a machine of the class described, a frame, a mixing drum mounted for rotation on the frame and provided with a plurality of discharge spouts, a pivoted gate forming a closure for each discharge spout, bell crank levers pivotally mounted on the spouts and each provided with a roller, a link forming a connection between each bell crank lever and the pivot pin of the adjacent gate,

the rollers and successively close the gates to 1 permit filling of the discharge spouts.

In testimony whereof I afiix my signature in presence of tWo Witnesses.

WILLIAM D. WISE. Witnesses:

C. B. CURTIS,

LILLIAN C. MEYERHOFF.

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