US876270A - Concrete-mixer. - Google Patents

Description

FATENTED JAN. '7, 1908.

R. B. FULTON. CONCRETE MIXER. APPLICATION FILED JAN. 11. 190s.

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No. 876,270. PATENTED JAN. 7, 1908. R. B. FULTON. CONCRETE MIXER.

APPLICATION FILED JAN. 11. 1906.

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A TTOHNE Y S No. 876,270. PATENTED JAN. 7, 1908. R. B. FULTON.

CONCRETE MIXER.

APPLICATION' FILED JAN. 11. 1906.

3 SHEETS-SHEET 3.

ROBERT BARTON FULTON, Or RED CLOUD, NEBRASKA.

CONCRETE-MIXER.

Specification of Letters Patent.

Patented Jan. 7, 1908.

Application filed January 11.1906. Serial No. 295.565.

To all whom it may concern:

Be it known that I, .ROBERT B. FULTON, a citizen of the United States, and resident of Red Cloud, in the county of Webster and State of Nebraska, have invented a new and Improved Concrete-Mixer, of which the following is a full, clear, and exact description. My invention relates to mixing machines,

. it being especially directed to ap aratus for comminglinv the constituents o concrete. Its principal objects are to rovide a simple, efficient, portable machine or attaining this end. v

Reference is to be had to the accompanying drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views. Figure 1 is a central, vertical, longitudinal section through one embodiment of my invention; Fig. 2 is a side elevation of the feedend of the machine, vparts being broken away; Fig. 3 is a transverse section on the line 31-3 of Fig. 1 Fig. 4 is an' end elevation looking from the left in Fig. 1, parts being omitted; and Fig. 5 is a transverse section on the line 5-5 of Fig. 1.

I provide a main-frame 10 which is prefer'- l ably slightly inclined at its top from one end to the other, and made of angle iron.. 'At the lower portion of the frame is a section 11 pivoted to the main-frame at 13. Means for adjusting the angle of the section 11 is provided, it being here shown as consisting of a screw 14 oppositely threaded to engage both the mainrame and the movable section. By rotating this screw, the section may be either raised or lowered about'its pivotal point to retard or facilitate the passage ofthe sodden material in its passage to the discharge. Rotatably mounted near the extremities of the section l1 are pairs of separated rolls 15, 15, which serve as supports for track- rings 16 and 17 surrounding a mixing cylinder 18. Underneath the u per end of drum, is a horizontal Wheel 15a olted to main frame, revolving on a short vertical shaft, bringing the periphery of said wheel into contact with the vertlcal rim of the track-ringl to prevent the drum from gravitating down the incline. Bolted to the track-ring 16 is a toothed ring 19, from which a chain 20 extends to a s rocket-wheel 21 fast upon a shaft 22. This siiaft is j ournaled in an extension from mainframe and has connected to it ower-applying means, whiclimay be in t e form of a crank 23. This enables the shaft to be rotated at the desired speed and to, in turn, impart its movement to the mixing cylinder.

Rising from the main-frame, beyond the cylinder, is an auxiliary-frame 24, u on which are mounted two hoppers 25 andp 26 ada ted to contain cement and sand, respective y. These hoppers are located at different distances from the receiving end of the cylinder, they being preferably mounted in substantial alinement with its axis, the cement hopper being farthest from the cylinder. Each of the hoppers has a contracted throat,

that of the hopper 26 being rovided with aslide 27 by which the area of t 1e opening may be adjusted. 'lhe hopper 25 is shown as having one side 28 movable to control the area of the discharge-throat, and to this is connected a-lever 29 fulcrumed upon the outer casing. The lever preferably moves over a segment 30, which may be enga ed by detent mechanism 30u and is provi ed with a scale 31, conveniently indicating ratiosexisting between the quantities of cement and sand delivered. Along the bottoms of the hoppers extend troughs 32, through which passes a shaft 33 journaled upon the auxiliary-frame. This shaft carries conveyers 34 and 35, which, as illustrated, are of the screw type and are situated beneath the hoppers 25 and 26, respectively. The conveyer 34 and its associated trough are of less diameter than the similar elements for the hopper 26, this being due not only to the fact that it customarily delivers a smaller (uantity of material, but also because it llandles only that falling from its hopper, while the conveyer 35 also o erates upon the material delivered to it by t e conveyer 34. Fixed to the outer extremity of the shaft 33 is a sprocket-wheel 36, from which a chain 37 passes over a sprocketwheel 38 secured upon the shaft 22, thus causing the rotation of the driving means to be im arted to the conveyers.

ivoted upon the opposite side of the hoper 25 from the controlling member 28 isla ever 39, which has at its lower extremity an agitating projection 40, turned upwardly to enter the hopper-opening. Through this o ening it plays as the lever oscillates, the

e ge of said opening being referably curved to conform to the arc throug 1 which it moves. V

.articulated to the upper end of the lever is a lmk 41, which, at its op osite extremity, is plvoted to an actuating ever 42 fulcrumed upon a depending arm 42, This lever 42 ha's at each` side of its fulcrum a cam projection 43: These are alternately engaged by successive spokes of a gear 44 which is fast upon the conveyershaft. Its o eration causes'the ac tuatinglever to be rapid yswung in opposite directions as the conveyer-shaft rotates, transmitting its 'motion through the hnk to the agitating lever, the projection of which prevents the contained material from packing in the throat of the hopper 25.

\ Extending across the ho per 26 is a shaft 45 rotatably mounted in t e4 opposite walls and having agitating projections 46, which may be conveniently formed by lloo s of bent wire. From the inner end of the s aft, outside the hopper, depends an arm or lever 47, 7which hasv at its lower end an angular portion 48. With this arm portion contact revoluble arms 49 which project from the inner end of the conve er-shaft. .A spring 50 forces the arm 47 in t e opiposite direction to a y 52 meshing with the that invwhich itis move by the arms 49,

thus causing the shaft and its projections to be oscillated in the hop er 26, so that the wet sand contained there y may be stirred and ke t from clogging.V This movement is prefera ly slower than that of the agitating .projection 40, since the sand feeds more freely than cement.

Journaled in the auxiliary frame, below the conveyer-shaft, it being shown as diver ing therefrom toward `rthe cylinder, is a sha t 51, which has secured upon it a pinion ear-f 44, both of these elements being refera 1y somewhat beveled to provide for te angularity of the shaft 51. To the end of the shaft, adjacent to the cylinder, is fixed a head 53 from which ins or churns the descending) projections 54 extend into said cylin er beneath the inner end of the trough 32. This 54. Throughout the length of the pipe 58 are comparatively minute p erforations 59, by whic jets the liquid may be'delivered to the material as yit passes through the cylinder. Inthe pipe 57 are .valves 60 for controlling 1 the flow "shaft-22B rotated at t om thejet-openings. A v lIn using the apparatus for the production of concrete, cement is supplied'to thehopper '25 and sand to the hop er 2.6, and the drivinge proper s eed. The

.movement of the agitating mec anisms in -however damp and sticky it may be, to f a l the hoppers causes the contained material,

through the throats into the conveyers. Here the cement is mingledwith the fallin sand, thus getting a preliminary mixing, an the material so. combined falls from the trough upon the rapidly rotating projections Wall ofthe cylinder, further commingling it, while it is Ystill in a dry stateD The mixture then passes alongthe cylinder by virtue of the inclination of the latter, this being adment. In this travel it is carried up the cylinder by its rotation, falling over and over to complete the mixture. A At the same time, the water or lother liquid falling from the pipe 58 is mixed with it, so that when the material emerges fromthe delivery end of the cylinder it is ready for use. The lever 29 maybe set u on the'scale to give, for a deiinite area of t oat ofthe hop er 26, a predetermined number of parts o cement to the sand, so -that when this setting has once been made, no further attention need/be paid to the proportioning, it bein only necessary to keep the hoppers sup lie with the material.

ber has, for convenience, been termed a cylinder, but it will'be evident that this need not be of circular section, and the Word is intended tov designate any suitable container.

My improved machine contains no com lli-i .54. These throw it outwardly'against the justed to secure the proper rate of move- The element furnis ing the' mixing-chamcated parts, and, if broken, may berea ily' repaired bytheclass` of laborer usually employed in Work of this character. It can be readily moved from lace to place and dis-` to distant oints. v

' The feeding portion of the apparatus is quite distinct from the mixing-chamber; and may be applied to existing machines.

shaft having a disk adjacent to the drum at pipe being perforated Within the drum, a

-sembled or knocked own for transportation v Aim: Having thus described my invention l the upper end thereof, said disk having pins projecting from the face thereof and extending into said drum, an auxilia frame conlorf' the drum, a sand hopper and a cement hopper vsu mixer. comprising a main 'frame and inclined with respect thereto, meansfor varying the inclination of the' nected with the main-frame at t e upper end pfported by the auxiliary frame, j means for -eeding Acement and sand in unframe, a drum rotatably supported in the I drum with respect to the frame, a tank supijorted adjacent to the drum, a pipe leading immediately above the disk, and means for rotating the drum and the disk.

3. A concrete mixer comprising a mainframe, a drum rotatably supported within the. frame and inclined with respect thereto, an agitator comprising a rotating disk having pins projecting from the face thereof at the end thereof, a sand hopper and a cement hopper delivering to thedrum at the upper end thereof and immediately above the agitator, means for feeding sand and cement. in definite proportions, means for moistening the material during its passage through the drum, and means engaging the periphery of the drum for rotating the same. y

.4. A concrete. mixer comprising a main frame, a drum rotatably supported within thel frame and inclined with respect thereto, means for varying the inclination of the drum, an agitator comprising a rotating disk having pins projecting from the face thereof within the drum at the upper end thereof, means for feeding cement and sand in delinite proportions to the drum, said feeding means delivering immediately above, the agitator, means for lnoistening the material during its passage through the drum, and means for rotating the drum,

5. A eement mixer, comprising a main fralne, a drum rotatably supported in the frame aml inclined with respect thereto, means for varying the inclination of the drum with respect to the frame, a gear ring on the. outer surface of the drum, an agitator oomprising a rotating disk having pins projecting lrom the. face thereof within the drum at the upper end thereof', means for feeding sand and cement in definite proportions to the drum,

said feeding means delivering immediately above the agitator, mean's for moistening the material during its passage through the drum, and means engaging the gear ring for rotating the. drum.

(i. A concrete mixer comprising :t main frame, a. drum rotatably supported within the frame and inclined with respect thereto, an agitator comprising a. rotating disk having pins projecting from the face thereof at the end thereof into said drum, a sand hopper and a cement hopper delivering to the drum immediately above the agitator, means for feeding sand and cementl in definite proportions, and means for rotating the drm-n.

ln testimony whereof l have signed my name to this specification in the presence. of two subscribing witnesses.

ROBERT BARTON FUI/VON.

Witnesses:

l). B. SrANoomc, Fimo Mariana.

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