US1204343A - Mixing-machine. - Google Patents

Description

F. A. CONNOLLY.

MIXING MACHINE.

APPLICATION FILED JULY 25.1916.

L2@4,343. Patented Nov. 7, 1916.

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MIXING MACHINE.

APPLICATION FILED JULY 25.1916.

Patented Nov. 7, 1916.

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MIXING-MACHINE.

specification of Letters lPatent.

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Patented Nov. Y, T916.

Application filed July 25, 1916. Serial Ito. 111,237.

ing-Machines; and T do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in mixers of the type commonly used for cement and concrete, but it is to be-understood that the machine is not limited to any specific application, it being adaptable for mixing numerous other materials such for instance as plain or smokeless powder.

The ob ect of the invention is to provide a comparatively simple and inexpensive, yet highly eficient and durable mixing device having novel means for expeditiously agitating the numerous kinds of plastic material.

With this general object in View, the invention resides in certain novel featuresot construction and in unique combinations of parts to be hereinafter fully described and claimed, the descriptive matter being supplemented by the accompanying drawings which constitute a part of this application and in which i Figure 1 is an end elevation of a mixer constructed .in accordance with my invention; Fig. 2 is'a central longitudinal section thereof taken on the plane of the line 2-2 of Fig. 1; Fig. 3is a vertical transverse section on the plane oi the line 33 of Fig. 2;

and Fig. 4- is a partial elevation of the end of the machine opposite that disclosed in Fig. 1. v t

In specifically describing the construction shown in the drawings above briefly described, similar characters will be employed to designate corresponding parts throughout the several views and reference will be herein made to the numerous elements by their respective indices. To this end, the numeral 1 designates a suitable frame preferably constructed of angle iron, said frame being shown in the present embodiment of the invention as mounted on a truck 2 which extends laterally therefrom and carries an engine or the like? which serves to drive the mixing mechanism to be described.

A pair of horizontal shafts d extend longitudinally of the machine and have mounted thereon rollers 5 which support the weight of a main mixing drum 6, this drum being of cylindrical contour and being preferably formed of two sections bolted or otherwise secured together as indicated at 7. The perlphery of the drum 6 is provided with guide flanges or ribs 8 which engage the sides of the rollers 5 and thus serve to prevent endwise shifting of the drum.

One end of drum 6 has formed therein a central opening of circular shape, into which opening a ortion of a bearing ring 9 fits snugly as s own clearly in Fig. 2, said ring belng secured in place by bolts 10. The periphery of the ring 9 has formed thereon a sprocket 11 around which'a sprocket chain 12 passes, said chain being trained around anothersprocket 13 which is driven from the engine 3 in the direction of the arrows in Fig. 1. The opposite end of the drum 6 has therein a circular opening it and a swinging delivery chute 15 is mounted on the frame 1 to be moved into the drum through said opening as shown in dotted lines in Fig. 2, the interior of the drum being equipped with a plurality of pockets 16 adapted to lift the mixed material to the upper side of said drum and to then deposit said material upon the chute 15 which will conduct it into any suitable receptacle, not shown. A plurality of angularly disposed vanes 17 are formed on the interior of the drum 6 and are so set as to convey the plastic material in said drum toward the delivery end thereof at which it will be acted on by the pockets 16. Other vanes 18 extend angularly in the opposite vdirection from the vanes 17 and assist in edectively agitating the material. To permit the machine to operate as required, it is necessary that the vanes 17 exceed in number the vanes 18, four of the former being preferably employed in connection with two of the latter.

An auxiliary drum 19 projects into the drum 6 through the bearing ring 9 thereof as depicted most clearly in Fig. 2, the outer end oi said drum 19 being in communicat1on w1th an inlet chute or hopper 20, while the inner end of said drum is formed with a plurality of openings 21 in the peripheral wall thereof, said openings being adapted to deliver phe plastic material from the drum 19 into the adjacent end of drum 6. A sprocket 22 is formed as an integral part of the drum 19 and receives thereon a sprocket chain 23 driven from a sprocket 24: on theshaft of the engine 3, said shaft being shown in the present embodiment of the invention as having thereon a spur gear 25 meshing with a similar gear 26 which is secured on the shaft of the sprocket 13. By this arrangement the two sprockets 13 and 24 will be reversely driven so that the drums 6 and 19 will rotate in opposite directions.

A shaft 27 which is preferably hollow is formed integrally with and extends from the axis of the inner end of the drum 19, the free end of said shaft being rotatably mounted in a suitable bearing 28 carried by the frame 1 and disposed at the center of the opening 14. Arms 29 radiate from the shaft 27 and carry paddles 30 on their outer ends, said arms being formed integrally with the shaft while the paddles are similarly connected with said arms and to the drum 19, this construction being easy and inexpensive to manufacture.

Preferably used in connection with the parts above described is a gate valve 31 operable at will from a hand lever 32, said valve moving across the delivery end of the hopper 20 to allow or obstruct the passage of the material to be mixed from said hopper into the drum 19.

In operation, the material to be operated upon by the machine is deposited in the hopper 20 and by means of the gate valve 31, the passageof this material in the drum 19 is controlled. From this drum, the plastics enter the drum- 6 through the openings 31 and are now acted upon by the arms 29, paddles 30, vanes 17 and 18 and pockets 16. Since all parts carried by the drum 6 are moved in opposite directions from those of drum 19, the mixing operation will be effectively and quickly performed, and when the material has been agitated to the required extent, the chute 15 will be swung to the dotted line position shown in Fig. 2 and will thus receive the mixed material which is raised by the pockets 16, as said material falls from these pockets. o

By constructing the improved machine in the manner shown and described, it may be manufactured and marketed at a minimum cost and with comparative ease and in operation it will be highly eflicient and durable. For these reasons, the construction shown and described constitutes the preferred form of the machine. It is to be understood, however, that within the scope of the invention as claimed, numerous discharging the material into the main drum, means for driving the two drums in opposite directions, separate agitating means rotatable with said drums and operating adjacent each other, and means for permitting the discharge of the mixed material from the main drum.

2. A mixer of the class described comprisinga main drum having at one end an opening, an auxiliary drum projecting into said opening and having an open outer end to receive the material to be mixed, the inner end of sald auxiliary drum having one or more openings'for discharging the material into the main drum, means for rotating the two drums in opposite directions, an agitator carried by the inner end of the auxiliary drum and disposed in the main drum, agi- I tating means on the interior of said main drum, and means for permitting the discharge of the mixed material from said main drum.

3. A mixer of the class described compris ing a main drum having in one end an opening, an auxiliary drum extending into said main drum through said opening, said auxiliary drum having an open outer end to receive the material to be mixed and having a closed inner end formed with one or more openings for discharging the material into the main drum, means for rotating the two drums in opposite directions, a. shaft extending axially from the inner end of the auxiliary drum through the main drum and having its free end rotatably supported, arms radiating from said shaft, paddles on the outer ends of said arms, agitating means on the interior of the main drum, and means for permitting the discharge of the mixed material from said main drum.

In testimony whereof I have hereunto set my hand inthe presence of two subscribing witnesses.

FRANK A. CONNOLLY.

Witnesses:

A. L. DE Bow, MINNIE E. MICKENS.

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