US909757A - Adjustable sieve. - Google Patents

Description

C. GLOSZ.

ADJUSTABLE SIEVE. APPLmA'rIoN FILED JUNE 3,1909.

909,757. Patented Jan. 12, 1909.

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CHARLES CLOSZ, OF WEBSTER CITY, IOWA.

ADJUSTABLE SIEVE.

Specification of Letters Patent.

Patented Jan. 12, 1909.

Application filed June 3, 1908. Serial No. 436,425.

To all whom it may concern:

Be it known that I, CHARLES CLosz, a citizen of the United States, residing at Webster City, in the county of Hamilton and State of Iowa, have invented certain new and useful Improvements in Adjustable Sieves; and I do hereby 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 present invention relates particularly to that class of adjustable sieves that are made of overlapped sheet metal sections constructed and arranged substantially as shown in my prior patent #873,719, of date December 17, 1907, entitled Adjustable sieve.

Sieves of the character herein illustrated and claimed are especially adapted, under certain adjustments, to separate wheat and other grains from chaff, short straw, white caps, etc., and under other adjustments to Separate small seeds, like timothy seeds, from heads, husks, broken stems and the like.

Especially this invention is directed to the provision of improved means for adjustably setting and holding the sieve sections in different operative positions, but the invention is also directed to the improvement of the sieve sections themselves.

The invention is illustrated in the accompanying drawings, wherein like characters indicate like parts throughout the several views.

Referring to the drawings, Figure 1 is a plan view of the improved sieve and. adjusting device. Fig. 2 is a vertical longitudinal section taken on the line x2 x2 of Fig. 1. Fig. 3 is a plan view showing one of the sections of the adjustable sieve, some parts being broken away and some parts being removed. Fig. l is a section taken on the line m4 act of Fig. 8. Fig. 5 is a detail in plan, with some parts broken away, showing the frictional coupling for adjustably setting the several sections in different working positions. Fig. 6 is a side elevation, showing the detachable coupling for connecting the adjusting rod to the cooperating adjusting lever; and Fig. 7 is a section taken on the line :v7 x7 of Fig. 5.

The numeral 1 indicates a rectangular supporting frame of a sieve, the same, as shown, having a central bar la.

The numeral 2 indicates the metallic slats or sections of the sieve, which sections are secured to rock shafts 3, are suitably mounted in the sides of the frame, and are provided with U-shaped cranks 4C at their central portions. A pushbar 5 pivotally connects the cranks l and is itself pivotally connected, at 5a, to a link or crank rod 6. The outer end of the link 6 is pivotally connected to the eccentrically located crank pin 7 of a crank lever or eccentric 8. This crank lever 8 is preferably constructed of flat `sheet metal and is pivotally connected at 9 to a bearing plate 10, which latter, as shown, is rigidly secured to the under surface of the transverse lower bar of the frame 1. The crank pin 7 has an enlarged head 7a that directly engages the under surface of the outer end of the link 6, and the said link is shown as provided with a stop linger 6a that is adapted to engage the lever 8 to limit the movement of said lever in a direction which opens up the sections of the sieve.

The crank pin 7 is passed through a friction plate 11 and through a flat spring 12, which parts are interposed between the link 6 and the lever 8 and directly engage, respectively, with the said parts 6 and 8. rThe friction plate 11 has laterally bent end lugs 112L that embrace the spring 12 andthe inner end of the lever 8 and thus hold the said parts 8, 11 and 12 for common oscillatory movements. The force of the said spring 12 causes the outer end of the link 6 to be frictionally clamped between the said friction plate 11 and the head 7a of the crank pin 7, and this friction, with a spring of proper tension, will serve to hold the link 6 and lever 8 in any such adjustments, and this in turn will serve to frictionally hold the sections of the sieve in any of their several working positions.

As a convenient means for moving the lever 8 from one side of the sieve, an operating rod 13 is, as shown, extended through a side board 1b secured to one side of the frame 1 and is provided, at its outer end,

with a hand-piece 14, while at its inner endy it is bent laterally at 13a and pivotally connected to the free end of the crank lever 8.

To detachably connect thesaid rod 13 to the said lever 8, a coupling head 15 is slidably mounted on the inner end of the rod 13 and is yieldingly pressed inward by a 'of the sieve sections, below coiled spring 16, anchored to said rod at its outer end. This coupling head 15 is provided with a bifurcated inwardly projecting flange 15a that normally underlies the end of the lever 8 and straddles the depending end 13a of the rod 13. IVhen this coupling head 15 is forced outward against the tension of the spring 16 far enough to carry this bifurcated flange 15a beyond the edge of the lever 8, the bent end of the rod 13 may be easily detached from said lever. This coupling head 15 is normally spring-pressed against the lever 8 so that there will be no rattling of the parts.

In the present application, as in my prior patent above identified, the slats 2 are corrugated, and between the corrugations, at their forward projecting raised portions of the said corrugations in the form of projectingyli'ngers. Those portions of the slats 2 that extend rearward of the respective rock shafts are bent downward at an angle with respect to the corresponding finger port-ions. To the front and rear bars of the frame 1 are rigidly secured other metallic slats 17 and 18, the former of which has no notches and the latter of which is provided with vfingers and notches of the character alreadyV indicated.

In each Slat, immediately over its rock shaft 3, is a main or primary dividing ridge 19, and on the intermediate portion of the rearwardly inclined section of each slat is a raised so-called secondary dividing ridge 20. By reference to Fig. 4 it will be noted that the rear portions of the slats which are at the rear of the so-calledV secondary dividing ridges 20 are formed with depressions 201. In the construction so far described,

the said slats are substantially identical with those shown in my said prior patent, the rear edge portions of the slats are extended rearward and downward on a curved line,y at 21, and are then bent under and forward and attached, by solder or otherwise, to the respective rock shafts 3. These downwardly curved portions 21 extend for a considerable `distance beyond the depressions 20a and they serve to direct upward through the sieve surface made up of the several slats, blasts of air from the main blast, which, in practice, is blown in a forwardly direction under the sieve. By reference to Fig. 2 it will be noted that even when the sieve sections are closed, as indicated by full lines, the downwardly extended portions 21 project far below the sieve surface so that they will insure upward currents of air through the sieve surface. These upward currents of air through the sieve surface are essential to the proper separating action and, hence, Vit will downward extensions 2 1 of the rear portions the secondary ridges 2O and depressions 20, constitute an Vshafts supporting said slats,

be understood lthat the important feature of improvement over the construction shown in Vmyv said prior patent.

What- I claiinis:

1. The combination with a sieve made up of a plurality of overlapping oscillatory slats, of means for adjusting said slats comprising a push bar connecting said slats for common oscillatory movements, a hand-piece, and a connection between said hand-piece and push bar, including a frictional coupling or device arranged to frictionally hold said slats in different positions, substantially as described.

2. The combination with a sieve made up of a plurality of overlapping slats, of rock necting said rock shafts for common oscillatory movements, a crank lever, a link connected at one end to said push bar, a frictional coupling connecting the other end of said link to said crank lever, and an operating rod connected to the free end of said crank lever, substantially as described. Y

3. In a sieve,the combination with a frame, of a sieve surface made up of a plurality of overlapping slats, crank-equipped rock shafts mounted in said frame and to which said slats Vare secured, a push bar connecting the cranks of said rock shafts, -a crank lever pivoted to said frame a link pivoted at one end to said push bar, and a frictional coupling connecting the other end of said link to a push bar con-- said crank lever and serving to frictiona'lly hold said slats in different adjustments, substantially as described. e

4. The combination with a sieve frame, of a sieve surface made up of a plurality of overlapped slats, crank-equipped rock shafts mounted in said frame and to which said slats are secured, a push bar connecting the cranks of said rock shafts, a crank lever pivoted to one of the transverse end bars of said frame, a link pivotally connected to said fpush bar at one end, a frictional spring coupling connecting the other end of said link to said crank lever, and an operating rod pivotally connected to the other end of said crank lever and extending to one side of said frame, substantially as described.

5. The combination with `a sieve made up of a plurality of overlapping slats, of means for adjusting said slats comprising a pivoted lever and an operating rod, the said operating rod having a spring-pressed clamp detachably pivoting one end thereof to said lever, substantially as described.

6. The combination with a sieve frame and a sieve surface made up of a plurality of overlapping slats, of crank-equipped rock shafts mounted in said frame and to which` said slats are secured, a ypush bar connecting vided with a hand-piece located at one side of said frame, and a spring-pressed coupling head slidably mounted on said rod and having a bifurcated end flange arranged to embrace the end of said rod and thereby detachably hold the same pivotally coupled to said lever, substantially as described.

7. A sieve made up of a plurality of overlapping slats having at their overlapping forward edges linger portions and intervening notches, and which slats are formed with primary and secondary dividing ridges and with depressions between said ridges and at the rear of said secondary ridges, andV are further provided with down-turned rear 15 In testimony whereof l afiiX my signature 20 in presence of two witnesses.

CHARLES CLOSZ.

Witnesses:

C. A. BIERNATZKI, l. I. CLosz.

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