US1051027A - Grain-separator. - Google Patents

Description

D. W. STAHL.

GRAIN SEPARATOR.

APPLICATION FILED MAY 13, 1910.

1,051,027, Patented Ja11.21, 1913.

2 SHEETS-SHEET l.

+1. KKK i I COLUMBIA PLANOGRAPH 60., WASHINGTON, u. c.

1). W. STAHL.

GRAIN SEPARATOR.

APPLICATION FILED MAY 13. 1910.

1,05 1,027. Patented Jan. 21, 1913.

' 2 SHEBTSSHEET 2. ,52

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DAVID W. STAHL, OF SNYDER COUNTY, PENNSYLVANIA.

GRAIN-SEPABATOR.

Application filed May 13, 1910.

Specification of Letters Patent.

Patented Jan. 21, 1913.

Serial No. 561,234..

To all whom 1'25 may concern:

Be it known that 1, DAVID lV. STAHL, a citizen of the United States, residing in the county of Snyder and State of Pennsylvania, have invented certain new and useful Improvements in Grain-Separators, of which the following is a specification.

My invention relates to separating machines, and more particularly to that class of machines designed especially for use in cleaning grain and separating it from chaff, trash and other foreign material.

Among the objects of the invention may be mentioned the provision of improved means for supporting the shaking screens and for varying the extent of movement given to them.

lVith the above and other objects in view, and to improve generally upon the details of such apparatus, my invention consists in the construction and arrangement of parts hereinafter described and claimed, in which,

Figure 1 is a side elevation of my improved machine; Fig. 2 is a central longitudinal section therethrough; Fig. 3 is a view partly in end elevation and partly in section along the line 33 of Fig. 1; Fig. at is a fragmen tary front elevation showing the method of supporting the shaker; Fig. 5 is a fragmentary sectional view showing the operating eccentric; and, Fig. 6 is a fragmentary perspective showing the method of supporting and operating the screens.

My invention, as shown, consists of a complete machine adapted for use in connec tion wit-h a thresher or fan of any suitable type, the grain passing from such fan into my improved separator. Certain of its features, however, admit of application as at tachments to existing makes of fans or separators, as will be understood from the following description.

Referring to the drawings in detail, the machine, as shown, comprises the corner 'posts 1 between which extend the side boards Cross bars 3 and 4: extend across the ends of the machine and in conjunction with the plate 5 and tie rod 6 serve to secure the two sides of the frame together and support the mechanism.

' The shaker is designated in its entirety by the reference character 7, and is supported near one end by the swinging links 8, having their ends 9 journaled in the side boards of the machine. At the other end, the shaker is supported on a pair of links 10 pivoted thereto and pivotally mounted at their lower ends 11 upon the cross beam 3. The shaker comprises a chute 12 adapted to receive the grain at its upper end 12 and a spout 13 adapted to deliver the grain upon the screens. Below the spout 13 the shaker bottom extends downwardly as indicated at 14 and serves as a chute to catch the grain from the sieves and convey it to a suitable receptacle.

Extending across the machine and mounted in brackets secured to the bottom of the shaker is a bar or shaft 15. Pivoted to the bar 15 at each side of the machine is a pitman 16, having at its other end a journal box 17, in which works an eccentric 18 mounted on the maindrive shaft 19 of the machine. This shaft extends entirely across the machine and is journaled in brackets 19 depending from the side boards 2. On one end of this shaft is mounted a drive pulley 20 which may be belted to any suitable source of power. In the embodiment shown in the drawings, however. the separator is adapted for use as a hand power machine and, therefore, a belt 21 is provided extending from the pulley 20 around the drive wheel 22 mounted on a shaft 23 journaled in the side boards, and provided with a handle. 23 by means of which it may be turned.

My improved separator is adapted to employ a. plurality of superposed screens of various degrees of fineness. Two such screens 24 and 25 are shown in the drawing. These screens are provided with solid extensions 26 and 27 respectively, adapted to underlie the spout 13 in such a manner that the grain may be discharged from the shaker on to the screens. Near the end of the screensadjacent the chute is arranged a bail 28 which extends underneath the lowermost screen, as clearly shown in Fig. 2, and serves to support the screens. Each end 29 of this bail is journaled in a crank arm 30, rigidly secured to a transversely extending shaft 81 mounted in the side boards of the ma chine. Out-side of the machine the shaft 31 terminates at one end in a bell crank lever 32. The end of this bell crank issupported by means of a pin or stud 33 set into the side board. For some classes of work both screens are employed, while for others, but a single screen is used. WVhen the upper screen 24:, for instance, is removed, the construction above described permits of the lowerscreen being raised into operative 'position with respect to the chute 13. This is done by turning the shaft 31 thus lifting the bail 28 and with it the screen 25. Vhen the shaft has been turned to some such position, as indicated by dotted lines in Fig. ,1, the bell crank 32 may be supported in this position by withdrawing the pin 33 and inserting it in another hole (not shown).

At the rear end of the machine the screens terminate in rods 34 and 35 which are extended beyond the side frames of the screens to form pintles, as clearly shown in Fig. 6. These pintles are adapted to rest behind the clips 36 and 37 secured at each side of the machine to a swinging arm 38,

' pivoted at its upper end to a transversely extending shaft 39 journaled in the side boards of the machine. It will thus be readily seen that the screens may be lifted out of engagement with the clips and withdrawn from the machine when desired. The lower end of each of the arms 38 is bifurcated so as to form a slot 40 and in this slot works a transversely extending rod 41. By reference to Fig. 1, it will be seen that a connection 42 extends between the end of the rod 41 on each side of the machine and the end of bar 15, such connection being pivotally attached both to the rod and bar. As shown, the connection comprises a bow shaped strip of spring steel the resiliency of which serves to increase the effectiveness of the shaking motion imparted to the screens. In this connection it will be observed that the screens are reciprocated solely by means of this connection 42, the motion being received from the bar 15 attached as above described to the shaker, and transmitted through the connection 42 to the rod 41, thence to the swinging arms 38 and thence to the screens.

On each end of the shaft 39 is fixed a drum 43 about which is adapted to be wound a flexible connection 44 attached at its lower end to the rod 41. On one side of the machine at the extreme end ofshaft 39 is provided a hand wheel 47 by means of which the shaft may be turned, and a ratchet wheel 45, cooperating with a pawl 46, pivoted to the frame 1 of the machine, for holding the shaft in adjusted position. It will be evident that by turning the shaft 39 and winding the flexible connections 44 upon the drums 43 the rod 41 may be moved in the slot 40 toward the pivot point of the arms 38 in such a manner that the throw or stroke imparted to the screens can be varied as desired. When the parts are in the position shown in. the drawings, the throw of the screens will be a minimum, owing to the fact that the point of connection of the members 42 to the arms 38 is at the greatest distance from the shaft 39, but when the rod 41 is lifted to the upper part of the slot 40 the distance from the pivot point will be decreased and the extent of movement of the screens correspondingly increased.

It will thus be seen that 1 have provided a grain separator having improved means for effecting several desirable adjustments and capable of being applied to a number of differentuses, and it is thought that the many advantages of my invention will be readily appreciated by those skilled in the art.

hat I claim is 1. In a grain separator, a frame, a chute supported thereby and adapted to receive the grain, a swinging screen disposed below the chute, a pair of arms pivoted at one end to the frame, means for attaching one end of said screen to said arms, driving means connected with said arms for oscil lating said screen, and means for shifting the point of connection of such driving means relative to the pivot point of said arms, whereby their throw may be correspondingly varied.

2. In a grain separator, a frame, a chute supported thereby and adapted to receive the grain, a swinging screen on to which the grain is discharged from said chute, a pair of slotted arms pivoted atone end to said frame and connected with said screen, a rod passing through the slots in said arms, means for imparting reciprocatory motion to said rod parallel with itself, and means for shifting said rod in said slots toward and from the pivot point of said arms, whereby the extent of movement imparted to said screen may be varied as desired.

3.1n a grain separator, a frame and shaker supported thereby and adapted to receive the grain, a swinging screen on to which the grain is discharged from said shaker, a pair of slotted arms pivoted at one end to said frame and connected with said screen, a rod passing through the slots in said arms, means for imparting a recip rocatory motion to said shaker, a resilient connection between said rod and said shaker, and means for shifting said rod along said slots toward and from the pivot point of said arms, whereby a reciprocatory movement is also imparted to said screen, and

whereby the extent of such movement may be varied as desired.

In testimony whereof I {1111K my signature, in presence of two witnesses.

DAVID W. STAHL;

addressing the fiommissioner' of. Patents,

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