US1613846A - Machine for mixing cementious materials - Google Patents

Description

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MACHINE FOR MIXING CEMENTIOUS MATERIALS Filed August 10, 1925 6 Sheets-Sheet 1 ma ma,

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DAVID W. EYE, OF BROOKLYN, NEW YORK.

MACHINE FOR MIXING CEMENTIOUS MATERIALS.-

Application filed August 10, 1925 Serial No. 49,174.

This invention is concerned with mixing machines and more particularly with'apparatus for mixing cementious materials.

In the mixing of materials wherein a high degree of homogeneity is desired and particularly those grades of materials which are used in compounding floor surfacing, considerable difficulty is encountered in that it is necessary to work up the material to a stifi plastic consistency, while maintaining the homogeneal condition thereof immediately before the application of the material to the floor. This difficulty arises partly from the fact that some of the compound materials are shipped in dry or powdered form comprising several ingredients and other of the required materials entering into the compound may be shipped in liquid form or must be worked into solution and the shipping of the mixed dried materials causes'the more dense ingredients thereof to settle to the bottom of the sack or container in which it is shipped. When such shipped dry material is subsequently compounded with the liquid, the dry ingredients are not thoroughly distributed throughout the plastic mass in a uniform manner with the result that when such an improperly mixed compound is applied to the floor, the shrinkage thereof upon setting is not uniform, thus causing the formation of cracks.

The general object of my present invention, therefore, is the provision of a mixing apparatus which will thoroughly mix the dried materials while in powdered form at the place of application, and at the same time mix the solutions required, the apparatus being such that the liquid and dried materials may be brought together and the r,

final desired plastic mass obtained, while the materials are being constantly agitated.

More specifically, my invention is directed to the provision of a portable mixer which will include an. agitating tanlrfor stirring certain quantities of solids in a measured quantity of solvent, such as water,

and a masticating apparatus which will first serve as a dry mixer and then serve as, a

plastic mixer.

A further object of my invention is the provision of an apparatus for the foregoing stated purposes which is compactly arranged and which embodies a common power means and control for driving .the respective mixers. I

. Other objects of my invention will hereinafter be set forth in the following specification referring to the accompanying drawings illustrating a preferred form thereof. The essential characteristics are summarized in the claims.

In the drawings, Fig. 1 is a plan view of an apparatus embodying v my invention;

Fig. 2 is a side elevation of theapparatus as viewed from the material charging side thereof;'Fig. 3 is a cross-sectional elevation taken longitudinally through the apparatus as viewed from the material discharging side thereof; Fig. 4 is a transverse cross-sectional elevation taken substantially along the line 4-4 of Fig. 1; Fig. .5 is an enlarged cross-sectional detail taken substantially along the line 55 of Fig. 1; Fig. 6 is a cross-sectional detail taken through the plastic mixer and showingthe container of the mixer in an upright material receiving and mixing position; Fig. 7 is a view similar to Fig. '6 showing the container, in a tilted, material discharging position; Fig. ii is an enlarged detail of the container tilting mechanism and Fig. 9 is an enlarged cross-sectional detail showing a clutch control mechanism.

My apparatus comprises essentially a plastic mixer mounted on a common base "or chassis which also carries a liquid mixer and mechanism for charging and discharging the materials into and out of the mixers. The driving mechanisms for the respective mixers are so arranged as to be driven by a common motor with suitable clutches and controls for operating each mixer singularly or simultaneously and my apparatus also embodies pumps and driving mechanisms therefor for transferring the solutions from the liquid mixer to the plastic mixer when desired.

In thegdrawings, Figs. 1, 2 and 3, I show a chassis or frame structure comprisinglongitudinal channel members connected by transverse members 16 and having the forward and rearward ends thereof connected by end cross members 1 7. The chassis is mounted upon rear wheels 18 and front dirigible wheels 19 with the axles connected to the frame in any suitable manner. Superimposed upon the chassis structure are mixer supporting brackets 20 and'22 which rest upon transverse chassis frame members 23.

The brackets 20 and 22 support'a plastic mixer, having a container 25, the latter being 'tiltable to discharge it in a manner to be hereinafter described. Within the container 25 are mixing blades or masticators 28 integrally formed as a frame mounted upon stud shaft members .27 and 28. The members 2'? and 28 are rotatably mounted in flanged sleeve members 30 and 31, a flange of the former being securedto an end wall of the container 25. The sleeve member 30 is revolubly mounted on the bearing bracket 20. In order that torque exertion upon the blade frame 26 will be properly distributed in the frame structure, I provide a gear on each side of the blade, namely gear-s34 and .36 .On the shafts 27 and 28 respectively for driving the blades.

The liquid mixer may comprise a cylindrical tank 40 mounted upon the rear end of the chassis frame and this tank may be provided with a cover ll of sufiicient strength to .constitute a side support for a stirring shaft 43 which has a base support 44 at the bottom of the tank. The shaft 43 carries agitating or stirring blades 45 and is suit- .ably driven through reduction miter gears 48 and i9, the pinion gear being mounted upon a horizontal shaft 50 which is carried by suitable brackets 51 surmounting the top member -11 of the tank structure. The shaft 52 carries a pulley 53 at one end thereof. taking power through a belt from a common driving shaft as will be hereinafter described.

To facilitate the charging and discharging of the material into and out of the mixer, the container 25 is constructed to be entirely open at the top, as shown in Figs. 6 and 7, .but is provided with a stationary arcuate cover or canopy 55 which is suitably mounted upon rigid upright members 56 extending upwardly from the bracket members 20 and 22. This canopy 55 is provided with an 'openingiSO through which the dry materials may be discharged thereinto from an elevator 72 shown in side elevation in Fig. 4.

The elevator may comprise an enclosed bucket conveyor 68 extending over sprockets carried by shafts 69 and 70 suitably mountfed upon the conveyor enclosing structure. At the top the conveyor is provided with a discharge chute portion 73 communicating with the opening 60 of the canopy 55 and adjacent the bottom thereof with an intake hopper 74L, the entire structure being supported on the chassis and carried by frame work 7 6 secured thereto. The frame Work supports the structure with the bottom thereof clear of a floor or support upon which the entire apparatus may be resting.

.Afpump is shown at (see Fig. 1) for pumping liquid from an extraneous source into the container 40 of the liquid mixer, and a second pump 81 (see Fig. 3) is shown disposed beneath the frame 15 for transferring the mixed liquid from the liquid container 40 to the container 25 of the plastic pump 81, upwardly to the canopy structure '55, and discharges at the top of the plastic mixer through a. plurality of drop extensions 8%, whereby the liquid may be discharged uniformly over the dry materials charged into the mixer by the conveyor.

The respective mechanisms hereinbefore described are driven through power transmitting mechanisms from a loi'igitudinally extending power shaft 85 suitably mounted on the elongated frame 15 to extend adjacent the elevator and mixers. The power shaft 85 is preferably driven by a motor '86, mounted upon the frame 15 at the front thereof with the motor shaft extending transversely of the frame, and a reduction gearing is provided to drivingly connect the motor shaft 88 to the power shaft 85.

The power take-ofis or power transmitting mechanisms for the respective mixers, conveyor and pumps, will now be described. The gears 34 and 36 which are mounted on the mixing blade shafts 27 and 28 are respectively driven by pinions 90 and 91 rigidly mounted on a countershaft 92 which is supported by extensions of the power shaft brackets 93 and 94 (see Fig. 2). The counter-shaft 92 carries a gear 96 adjacent the pinion 90, rigidly mounted thereon, which is driven a loosely mounted gear 97 on the power shaft 85. The gear 97 is provided with clutch teeth 98 affording engagement with a clutch sleeve 99 splined to the shaft 85. The clutch sleeve 99 is operated through a shift mechanism comprising a forked lever 100 supported by a bearing block 101 secured to the side members of the frame 15. (See Fig. 9.) The forked lever comprises the fork proper and a vertically disposed stud 100 upon the lower end of which is mounted a short lever arm 102; the latter being operated by a rod 108 extending transversely of the frame to the discharge side of the plastic mixer. The rod 103 is operated by a hand lever 10% suitably mounted on the frame (see 7 Figs. 1 and 9).

Power transmitting mechanism for positively tilting and uprighting the plastic mixing container is also controlled from the discharge side of the plastic mixer and such mechanism may comprise, as shown in Figs.

3 and 8, a fan-shaped worm gear or segment 110 rigidly mounted upon the outer end of the sleeve extension 30 of the mixing container'25, which meshes with and is driven by a worm 111. The worm may comprise part of the transversely extending shaft 112 as shown. Rigidly mounted on the shaft 112 is a gear 113-which is driven by a pinion 114 mounted upon a second shaft 115 ex tending transversely of the frame. The shaft 115 extends to the discharge side of the mixing container and is provided with a hand wheel 116 for manual adjusting of the posed therebetween and which is in splined engagement with the shaft 115. In constant mesh therewith is a. driving gear mounted on a short shaft Suitably bearing in brackets carried by the frame 15 and this short shaft carries arigidly mounted spur gear122 which is driven by a gear 123 mounted on the power shaft 85. The clutch sleeve 119, as shown in Fig. 8, is controlled by a yoke or forked member 126 carried by a shipper rod 127 paralleling the shaft 115. The rod 127 is operated by a hand lever 13o, disposed at the discharge side of the apparatus. It will be apparent that'when the clutch sleeve 119 is in engagement with one of the hand gears 118, the container 25 will be tilted to an upright position and when thesleeve is in engagement with the other gear 118, the container will be tilted to a discharging position.

A. safety device for limiting the tilting movement of the container 25, through the mechanism described, may comprise cams 25 and 25 extending from the side wall of the plastic mixing container adjacent the worm and gear mechanism which tilts it. These cams respectively engage the end of a rocking lever 131. The lever 131 is mounted 'on a post 197 at a'proper elevation, whereby the other end thereof will be disposed over the shipper rod 127 between two upwardly extending pins 127 carried by the rod. lVhen' the container 25 is tilted to a -complete discharging position, as shown in Fig. 7, the cam 25 will act on the lever 131 'andthus shift the clutch sleeve 120 to the non-engaging position shown in Fig. 8. When the power mechanism is uprighting the container the cam 25 will act on the end of the lever, thus causing'the other end to act on the shipper rod 127 and shift the clutch sleeve 119 in an opposite direction to the non-engaging position.

i As already stated, the pump 81 serves to pump a measured quantityof liquid from the liquid mixer and a lever gauge 40 is provided with graduations so that the operator may stop the pump when the desired quantity of liquid has been transferred to the plastic mixer. The pump 81- may be of the centrifugal type and is preferably mounted beneath the tank 40 so that the tank may be entirely drained with that type of pump. The pump may be driven by a belt 130 extending over'a pulley 131 mounted on the pump-shaft '81 and a pulley 132 mounted on the drive. shaft 85. The pulley132 isprovided with clutch teeth 134 affording engagement for a clutch sleeve 135 splined to the power shaft 85. The clutch sleeve 135 is operated by a fork lever mechanism and control lever extending to the discharge side.

of the container. Such control mechanism may be a duplicate of'the control mechanism for connecting the clutch sleeve 9910 the power'shaft 85 to drive the plastic mixing blades'and a detailed description thereof will therefore be omitted. A hydrometer column 40 is attached to the liquid mixer to indicate. to the operator when the desired quantity of material has entered'into the solution being mixed, I

The power transmitting mechanism for driving the mixing blades 45 of the liquid mixer may comprise a belt extending over the pulley 53 (see Figs. 2 and 3) and over a pulley 142 loosely mounted on the drive shaft 85. The pulley 142 is provided with clutch teeth 143 at the hub thereof affording driving engagement with a clutch sleeve 144 splined to the power shaft 85. The clutch sleeve is operated by a fork and control mechanism such as has heretofore been described with the control or manually operated lever disposed at the discharge side of the apparatus. I V i The intake pump 80, as shown, may be positioned upon the elongated frame supporting the apparatus, with the shaft thereof in alignment with the power shaft 85 and the pump shaft isaccordingly provided with a clutch collar 161rigidly mounted thereon, which is engaged by a clutch sleeve 162 splined to the rear end of the shaft 85. A shifting fork 163 for the sleeve 162 is mounted on an" upright rod 164 which is suitably supported in a bearing block mounted on the frame and the lower end of the upright rod is provided with a small lever arm 166 (see Fig. 1), operated by a transversely extending rod 167 connected to a hand lever 168, disposed at the discharging side of the machine. v v

- "The power take-off for the elevator 7 2 may comprise asprocket 180, rigidly mounted upon an extension 69 of the conveyor shaft 69, whichis driven from the countershaft 92 by a chain 181 extending over a sprocket 182 loosely'mounted on the shaft 92. The hub of the sprocket 182 is provided with clutch teeth 183. A clutch sleeve 184 is splined to the shaft 92 and engages the teeth on the sprocket 182. The clutch sleeve 184 is operated by a forked lever 185 carried by an upright rod 186 mounted in a bearing block 187 and a short lever arm 188 is mounted on the lower end of the rod 186. This shipper In order that the discharged material'may completelyclear the frame of the apparatus and may be discha-rged'into a receiving container, a chute 200 is provided (see Fig. 6) which carries a depending arm 201 bearing against and extending through a plate 202, secured to the elongated frame. The lower end of the arm 201 is connected to a rod and spring 203. Normally when the container 25 is upright, thechme'swings inwardly of its own weight against the side of the container. When the container is tilted to the discharge position, shown in Fig. 7 a pin 201 projecting from the side of the arm 201, will react on the edge of the plate 202 and cause the chute 200 to be supported in an extended slanting position, thus causing the material being discharged from the container to be guided downwardly clear of the apparatus. I

From the foregoing description of my 1nvention, it will be seen that I have provided a very compact, portable apparatus adaptable for the purpose of mixing materials, the'final mixing of which embodies a liquid which must be thoroughly mixed to a desired specific gravity and dry materials which must be thoroughly commingled and thereafter the wet and dry materials may be brought together while maintaining the agitation" of the dry materials thus causing the wetting of each particle of the dry material without permitting the dry mix to lose its desired thoroughly commingled condition.

I claim 1. In an apparatus of the character describec, the combination of a mixer for mixing dry then plastic materials, an elongated frame supporting said mixer, a liquid mixer having a liquid agitating means therein, a pump for transferring the liquid from the liquid mixer to the plastic mixer, a power shaft extending longitudinally of the frame, a motor for driving the shaft and mechanism for selectively connecting the mixers and pump to the power shaft.

2. In an apparatus of the character de scribed, the combination of a mixer for mixing plastic materials, an elongated portable frame tiltably supporting said mixer, a liquid mixer, pump for transferring the liquid from the liquid mixer to the plastic mixer, a power shaft extending longitudinally of the frame, a motor for driving the shaft, a material elevator mounted on the frame for charging the plastic mixer and mechanism for selectively operating the mixers, pump and elevator.

3. In an apparatus of the character described, the combination of a mixer for mixing dry then plastic materials, an elongated frame supporting the mixer, a liquid mixer also mounted on said frame, a power shaft mounted on the frame, rotating mixing blades mounted on shafts and disposed within the respective mixers, means connecting the power shaft to said blade shafts including clutches for selectively driving the mixer blades and mechanism connected to the power shaft for tilting the plastic mixer and a pump driven by the power shaft for trans fer-ring liquid from the liquid mixer to the plastic mixer while the latter is in operation and a clutch for operative-1y connecting the pump to the power shaft. I

4. In an apparatus of the character described the con'ibination of a mixer for mixing dry then plastic materials, an elongated frame supporting the mixer longitudinally thereon, a power shaft mounted on the frame, rotating mixing blades mounted on a shaft and disposed within said mixer, means connecting the power shaft to said blade shaft including a clutch for selectively operating the mixer blades, and mechanism connected to the power shaft for tiltthe plastic mixer and a pump mounted on the frame and driven by the power shaft for forcing liquid into the plastic mixer and a clutch for drivinglyconnecting the pump to the power shaft. H

5. In an apparatus of the character described the combination of a mixer for mixing dry then plastic materials, an elongated frame tiltably supporting the mixer, a liquid n'iixer also mounted on said frame, a-power shaft mounted on the frame, rotatingmixing blades mounted on shafts and disposed within the respective mixers, means connecting the power shaft to said blade shafts including clutches for selectively operating the mixer blades, mechanism connected to the power shaft for tilting the plastic mixer, a pump driven by the power shaft for transferring liquid from the liquid mixer to the plastic mixer, a separate pump for charging the liquid mixer and a clutch for drivingly connecting each pump to the power shaft.

6. In an apparatusof the character described, the combination of a liquid and plastic mixer mounted on an elongated frame, a power shaft mounted on the frame, a. motor for driving the shaft, the container of said plastic mixer being tiltable, a blade frame disposed within the container for agitating the plastic material therein, shafts supporting said blade frame, and gears mounted on the end of each shaft-, pinions mounted on the power shaft for driving said gears, and a clutch for connecting the pin ions to the drive shaft, a worm gear secured to the container, a worm and shaft for driving said worm gear, and other gearing for driving the worm and shaft in two directions including a reversing clutch, and a pump driven by the power shaft for trans fcrring-rine liquid from the liquid container to the plastic mixing container.

7. In an apparatus of the character described, anelongated frame, a liquid mixer and a plastic mixer mounted on the frame, the plastic mixer being so disposed on the frame thatthe blade shaft thereof extends longitudinally of the frame, a power shaft extending substantiallycthe length of the frame, a vertically disposed blade shaft in the liquid container, means for driving said shaft including beveled gearing and a horizontally disposed shaft, a power take-off extending between the power shaft and the last named shaft for driving the liquid mixer blade shaft, a pump driven by the power shaft for pumping liquid into the liquid mixer and a second pump driven by the power shaft for transferring the mixed liquid from the liquid container to the plastic mixer container.

8. In combination, a liquid mixer and a plastic mixer mounted on an elongated frame, a power shaft mounted on the frame and extending adjacent said mixers, rotating blades disposed in said mixers and mounted on shafts, power transmitting mechanism extending between the mixer shafts and said power shaft, clutch mechanisms for the respective power transmitting mechanisms for selectively driving the blades of the respective mixers, said plastic mixer having a tiltable container whereby the material may be discharged therefrom whil the blades thereof are being rotated, power transmitting means for positively tilting and uprighting the container, the power transmitting means being driven by said power shaft and including a clutch for reversing the tilting movement of the container.

9. In an apparatus of the character described, the combination of a mixer, for liquid material, a pump for transferring the liquid from said mixer, said pump being located in a plane beneath the mixer, a sec ond mixer for commingling dry materials and adapted to receive the liquid from said pump and commingle said dry material with the liquid, a frame for supporting both of said mixers and a motor and power shaft therefor mounted on the frame and arranged to selectively drive both of said mixers.

10. In an apparatus of the character described, the combination of a mixer for mixing dry, then plastic materials, an elongated frame supporting the mixer, a power shaft mounted on the frame, rotating mixing blades mounted on a shaft and disposed within said mixer, means for connecting and disconnecting the power shaft to and from said blade shaft, a mixer for mixing liquid material, a pump for conveying said liquid material to said first named mixer and a hydrometer arranged in connection with said liquid mixer whereby the material in the liquid mixer may be transferred to 7 11. In an apparatus of the characterdescribed, the combination with a mlxer for.

mixing dry, then liquid materials, a frame therefor, means rising from the frame for supporting the mixer, power means mounted on the frame, mixing blades within said mixer, means for connecting said blades to the power means, mechanism for tilting the mixer to discharge mixed material therefrom, saidmechanism including a gearing for transmitting power from the power means, and a manually operated clutch, and means for operating said clutch to disconnect the power means, said means becoming active consequent upon the mixer becoming tilted to dumping position.

12. In an apparatus of the character described, a tiltable mixer for mixing dry, then liquid materials, means for charging the mixer from the top thereof, power means for operating said mixer and means for selectively connecting and disconnecting said power means, mechanism for tilting the mixer to discharge the mixed materials therefrom, a manually operable clutch for controlling said tilting mechanism and a cam carried by the mixer for disconnecting said clutch consequent upon the mixer becoming tilted to dumping position.

13. In combination, a tiltable mixer, a bearing support therefor, power means for driving the mixer, mechanism connectible to the power means for tilting the mixer to discharge material therefrom, said mechanism including a system of gearing and a clutch adapted to enact with the gearing to tilt or raise the mixer, a manually operable lever arrangement connected to the clutch for starting the tilting movement and a cam carried by the mixer arranged to act on said lever arrangement for disconnecting the clutch when the mixer is completely tilted.

14. In a mixing machine, in combination, a receptacle tiltably mounted on a frame, a guide chute pivoted to the brim of said container, and means for raising said guide chute to active position consequent upon the mixer becoming tilted-to discharge mixed material therefrom. V

15. In a device of the character described, a receptacle open at the top for containing materials to be mixed, mixing blades within the receptacle, driving means for the mixing blades, means for tilting said receptacle to discharge the contents therefrom, a guide chute for receiving said contents, pivoted to the brim of the container, an arm pivoted to the guide chute and extending downwardly therefrom, and a guide for the arm, said guide being so arranged that when the container is tilted, the arm is caused to move the guide chute and carry it to active position to receive material discharged from the container.

16. In an apparatus of the character described, in combination with a mixer for mixing dry, then plastic material, a frame, a container supported by the frame, and arranged to be tilted to discharge the contents therefrom, a guide chute pivoted to the brim' 10 ofsaid'container, and a lever arm pivoted tothe guide chute, a retaining member for the arm, an abutment on: said lever and means: whereby when the. abutment contacts with.

the retaining member, the guide chute: is

drawn outwardly into active position, to; receive material discharged: from the con..

signature.

DAVID BYE;

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