US1228800A - Grading or separating machine. - Google Patents

Description

S. MARSHALL. GRADING 0R SEPARATING MACHINE.

APPLICATION nuzn SEPT-1.1916.

1,228,800., Patented June 5, 1917.

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s. MARSHALL.

GRADING 0R SEPARATING MACHINE. APPLICATION FILED sEP T. 1. 1916.

Patented June 5, 1917.

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GRADING OR SEPARATING MACHINE.

Specification of Letters Patent.

Patented June 5, 1917.

Application filed September 1, 1916. Serial No. 118,140.

To all whom it may concern:

Be it known that I, SYLvns'rER MARSHALL, a citizen of the United States, residing at Athens, in the county of Athens and State of Ohio, have invented certain new and use ful Improvements in Grading or Separating Machines, of which the following is a specification.

My invention relates to a grader or separator such as shown in my Patent 1,198,395, dated September 12, 1916.

The objects of the invention are to increase the capacity of the machine, shown and described by providing a cylindrical screen extending up from the flat sieve or screen parallel with the inner side of the outer rim and spaced therefrom; to provide an improved manually actuated discharge mechanism; to simplify the prior construction by avoiding the necessity for an adjusting mechanism for the sieve or screen and to provide the base or tripod with a novel means for supporting a bag under the outlet for the perfect material or seed grain.

These objects I accomplish by the construction shown in the accompanying drawings,'in which:

Figure 1 is a sectional perspective of a machine containing my improvements;

Fig. 2 is a sectional side elevation thereof;

Fig. 3 is a sectional plan view; and

Fig. 4 is a perspective of the base or tripod forming the support for the screens and bags to be filled.

Fig. 5 is a detail view showing the curved valve plate and a cooperating bucket upon an enlarged scale.

A, designates the base or support in the form of a tripod terminating at its upper end in a three armed head a to the arms of which the upper ends of the side bars a are secured by bolts a; the lower ends of the side bars a being connected by the triangularly arranged base bars a From the head a projects, at an angle of 45, a fixed tubular bearing or axis at a.

B, designates three bag holding fingers pointed at their upper ends and projecting upwardly from the three arms of the head a to which they are secured by the bolts a D, D, designate the two fiat screens or sieves, which, as in my aforesaid application, are of a mesh or have openings large enough to permit the passage of the grains having the greatest transverse diameter, in the mass of grain to be treated. These screens or sieves are surrounded by imperforate rims d, to the lower edges of which are secured the imperforate bottoms d. The upper edges of the rims d, are provided with inturned or inwardly projecting annular flanges cl".

Within the outer imperforate rims d par allel therewith and spaced therefrom, are the cylindrical screens D secured at their lower edges to the flat sieves or screens D, D, respectively. These cylindrical screens or sieves D also have their openings large enough to permit the passage of the grains having the greatest transverse diameter in the mass of grain to be treated, and their addition to the machine greatly increases the output. Cylindrical screens with flat screen bottoms are in fact formed by this construction.

E, designates a cylindrical block with crossed recesses in its top in which lie the transverse arms F of the spider-like frame F which carries the two sieves D, D; said frame having arms f extending along the screen rims-d to which they are securely fastened by screws f or in any other suitable manner.

G, designates the outlet tube for the largest grains separated out. This tube is secured at its upper end to the cylindrical block E, and extends down through the centers of both screens D, D, and their false bottoms d. The tube G, has openings g, g in one side at about the level of the screens D, D. Within the tube G, is a central spindle H, secured at its upper end to the block E, and extending into the tubular bearing a on which it rotates. The lower or outlet end of the tube Gr, extends down between the three bag holding fingers B, so as to discharge the selected grain into a bag held on said fingers. I

J, J, designate curved plate valves mounted ona common shaft J to open and close the openings g, g in the tube G.

K, K, designate two buckets or gates mounted on a common shaft is, one for each screen. These buckets or gates K, K are secured at their rear sides between their inner and outer edges to the said shaft is and when in their operative position extend from the cylindrical screens D D to the outlet tube G where they register with the flanges g on the rear edges of the openings g, g to direct the perfect grain into said openings. In this position the rear sides of the outer edges of the buckets or gates their operative position; the spring being placed under tension by means of a handle secured to the upper end of shaft 70 and adapted to snap under-a spring catch 70 secured at the base of the handle A* by means of which the screens are rotated. This spring catch 70 has a finger piece 76 by means of which it may be lifted out of en- -gagement with the handle 7% whenever the buckets or gates K, K are to be thrown into operative position.

The spaces between the flat screens D, D, and their imperforate false bottoms d, are connected by a discharge chute L; the rims (5 having openings leading into chute L, as shown at Z. The lower screen D, is fed by means of a spout (Z while the grain is poured directly into the upper screen.

It will be seen that the cylindrical screens D are at right angles to the flat screens D, D, so that an angular space will be formed at the lower portion into which the grain will fall, and from which it will be lifted when the screens are rotated. To assist in lifting and stirring the grain as the screens are rotated, I provide the cylindrical screens, at points opposite to the cleats 7a, with angle pieces M forming lifters or stirrers.

The machine is only intended for grading or separating the largest grains for seeding purposes and'so the openings in the screens are made large enough to let all of the grain fall through, but owing to the inclination of the screens the largest grains will slide down across the openings while the smaller inferior grains will pass rapidly through the screens. The smaller inferior grain, cockle, cheat and the like comprise from 30% to 50% of the grain from which the seed is to be separated.

The sieves being supplied with grain, the buckets or gates K, K, being swung to their inoperative positions and the valves J, J being closed, the sieves are slowly rotated to thereby carry the mass of grain. up the inclined surface of the screens D, D, and up the cylindrical screens D As the grain is carried up it will begin to slide down the screens and the smaller inferior grains will rapidly fall through upon the imperforate false bottoms (Z and pass to the chute L and out of the lower open end thereof. The largest grains remaining will then be removed by releasing the catch 70 and thereby permitting the spring 713 to throw the buckets or, gates K, K across the gnnular space between tube G and the cylindrical screens D and in so doing also open the valves J, J. By now turning the screens, the mass of large grains will'be lifted by the buckets or gates K, K and discharged into the central outlet tube. The buckets or gates and the valves will then be set for another operation.

The addition of the screens D greatly increases the capacity of the machine as will be readily appreciated. The number of revolutions given the screens to obtain the seed grain will depend upon the foulness of the mass of grain, but the grading is rapidly done in anyevent, owing to the openings be: ing larger than the greatest transverse diameter of the largest grains.

What I claim is:

1. A grader or separator comprising, an inclined rotary screen or sieve formed of a circular rim, a flat reticulated bottom, and a cylindrical screen within and spaced from the said rim and secured at its lower edge to the said reticulated bottom; the openings in the said reticulated bottom and cylindrical screen being larger than the greatest transverse diameter of. the largest grains, an outlet being provided through the rimbetween the reticulated and imperforate bottoms, and independent means for discharging the largest grains from above the reticulated bottom.

2. Agrader or separator comprising, a suitable base or support, a rotary inclined fiat screen or sieve mounted centrally thereon and provided with an axially arranged outlet, a valve controlling said outlet and aseparate and independent bucket or gate operatively connected at its inner end to said valve to open and close the same and adapted to open the valve, lift the graded material and discharge it directly into said outlet. 1

3. A grader orseparator comprising, a suitable base or support, a rotary inclined fiat sieve mounted centrally thereon and having an imperforate rim, a cylindrical, screen extending up from the flat screen at right angles thereto and spaced from the said rim, an imperforate bottom below the flat screen having a discharge outlet, an axially arranged outlet tube extending through the said imperforate bottom and fiat screen and having an opening in one side above the flat screen, and means for lifting the graded material and discharging it directly into said axial outlet.

A grader and separator comprising, an inclined rotary screen having a centrally arranged outlet, a hinged valve therefor, and a bucket pivoted within the screen or sieve to swing at its outer end toward and from the rim of the sieve and at the inner end into and out of register with the rear wall of said outlet and a link connecting the inner end of the bucket with the adjacent free end or edge of said valve for the purpose described.

5. A grader or separator comprising, an inclined rotary screen having a centrally arranged outlet, a hinged valve therefor, a bucket pivoted Within the screen or sieve and operatively connected with said valve, a spring for throwing the bucket into operative position between said outlet and the rim of the screen, and a finger released catch for holding the bucket in its inoperative position as described.

6. A grader and separator comprising, an inclined rotary cylindrical screen or sieve having a fiat reticulated bottom, an imperforate cylindrical rim spaced from the cylindrical screen, an imperforate bottom spaced from the reticulated bottom, an outlet from the imperforate bottom, a central tubular outlet for the screen, having an opening in one side, and a manually controlled spring projected bucket and valve controlling said opening.

7. A grader or separator, comprising a plurality of parallel connected screens or sieves each having a circular rim, an inner cylindrical screen having a flat reticulated bottom, and an outer imperforate bottom, a central discharge tube extending through said screens and having side openings above the reticulated bottoms, hinged Valves for said openings, a spring operated rock shaft extending through both screens, discharge buckets or gates mounted on said shaft and operatively connected at their inner ends to said valves, and means for setting and releasing said rock shaft.

8. A. grader or separator comprising, a base having an inclined spindle or shaft at its upper end, a plurality of pins or fingers projecting up from the top of the base and spaced from the lower end of said spindle or shaft, a rotary fiat screen having a central axis mounted on said spindle or shaft and a central discharge tube surrrounding said axis and extending down between said pins or fingers. I

9. A grader or separator, comprising a base having an inclined spindle or shaft at its upper end, a plurality of parallel connected screens having flat reticulated bottoms, cylindrical reticulated sides, circular imperforate outer rims, imperforate bottoms, a central tubular axis engaging said inclined spindle or shaft and a central discharge tube concentric with said tubular axis, extending down through the several screens and provided with discharge openings, valves pivoted adjacent to said openings and manually controlled buckets or gates operatively connected to said valves for the purpose described.

SYLVESTER MARSHALL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. O.

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