US1648381A - Scraper for harrow disks and means for operating the same - Google Patents

Description

Nov. 8, 1927. 1,648,381

J. FLATLEY SCRAPER FOR HARROW DISKS AND MEANS FOR OPERATING THE SAME Filed June 16. 1924 4 Sheets-Sheet l 2 I a a 20 f G 3 o n 5 0 a 17 4 17 2 a u 16 4 E1 .,H n a 7 9 J a a 16 B i 9 a 7 B I m T a F n I I 0 I u I f 6 u 17 z 0 3 J 17 17 1 17 INVENTOR. Jplm HFJatZs y,

A TTORNE Y.

Nov. 8, 1927. 1,648,381

7 J. H. FLATLEY SCRAPER FOR HARROW DISKS AND MEANS FOR OPERATING THE SAME Filed June 16, 1924 4 Sheets-Sheet INVENTOR. Jbfizz [if/4227a y,

A TTORNE Y.

Nov. 8, 1927. 1,648,381

J. H. FLATLEY SCRAPER FOP HARROW DISKS AND MEANS FOR OPERATING THE SAME Filed June 16. 1924 4 Sheets-Sheet 3 INVENTOR. fihnHFlatZay,

syafizzm ATTORNEY.

Nov. 8, 1927. 1,648,381

J. H. FLATLEY v SCRAPER FOR HARROW DISKS AND MEANS FOR OPERATING THE SAME Filed June 16, 1924 4 Sheets-Sheet 4 attoz no, 1

Patented Nov. 8, 1927.

Joann, FLAILEY, or LITTLE YORK, .rLLnvoIsJ.

J sonAr R roe nan-now ris s Ann Means roaornnarinornasann.

Application filed iune 1c, I I

My invention relates to improvements in disk harrows. More particularlygthe inven tion pertains to improvements in scrapers for harrow disks and to mechanism for oper ating the same. One of the objects of my invention is to produce a scraper of apeculiarly different fornrfrom any of whichl am aware. Further, to present a working'e'dge thereof to the disk-surface in an entirely different manner, and in such manner that said disk can be readily and properly cleanedunder any conditions that may exist; d

Another object is that in presenting the scraper to its work the'dirt will be removed progressively fromra point nearest the center of disk-rotation, for example, toward the perimeter of the disk to the end that the draft upon the implement will not be suddenly increased. That is to say, rather than force a set of the scrapers into the entire bulk of the adhering matter on a series of disks, and thus suddenly increase the draft,

- it is my purpose to so construct the scrapers that agradual removal will take place, the Inaterial'being removed in a spiral cutuntil all is removed. But this will be made clear in the description to follow.

Still another object is to provide for maintaining the scrapers in yielding contact'with the disks and tolemploy a flexible member for each scraper adjustable with respect to a common operating member controlling a K series of such scrapers.

A still furtherobject is to furnish a mechanism for controlling all of the scrapers v wherein sets of the latter may be selective- 137 presented to the disks.

The appended drawings'illustrate my in vention in its preferred form though it is to be understood that the structures shown are susceptible of changes such as may be considered to ,lie within the invention and within the scope of the claims herein.

, Figure 1 is a plan of a disk harrow showing my invention applied thereto.

Figure 2 is'a rear elevation of a scraper of my invention showing its convex side.

Figure 3is a side elevation of the scraper as seen from its concave side.

EF' e 4B i a showing its concave form, r I

Figurefi showsthe scraper in perspective view at its front supported edge,

1924. 'seri i'no; 720,239.

Figure 6 is a side elevation of a portion of if a harrow disk showing the location of a scraper with respect thereto." f I Figure 7 shows a portion of a disk as viewed from above, a second disk in horizontal section, and a scraper showingits possible positions with respect to bothidisks.

Figure 7 is'a section of part of a disk in Figure 1.

Figure 9 is a rear elevation of the same.

Figure '10' shows, in perspective,v "certain" method of removal has not'b'een found to answer. Experience has shown that, tl ie dirt under some conditionswill accumulate or andscraper taken oi linef Figure 6. r

F igure 8 IS a plan 1n detail of parts shown buildup between the scrapers anddisks i forc g the f rmer away from,workingcontactl Again, when a scraper of the conimon'type is new there is asharp edge or corner in contact with theidisk' which'cleans properly;

under'ideal soil conditions. However, -S 1IlC6' the scraper body lies at an acute, angle to the disk-surfacesaid edge orwcorner is final-H ly worn to a bevel and simulates a chisel-end whereuponlt fails to properly, function since there is then no abrupt corner to act as a.

scraper should. When this condition obtams, the operator must remove all of the scrapersand restore their edges to the c n;

dition when first applied;

It is my. purpose, in view of the above, to so constructasc'raper and to so present it to the disk that a clean scraping action will be maintained indefinitely without attention.

This, however, will be made clear as "the I description proceeds,including other advan front elevation of the same l tages ofmy invention.

of a disk harrow, 2 the tongueor draft mem e", Wh @1 nd a e t rra n mem s below which are located disk-gangs jour naled in any usual and well known manner,

' members-3, for example, as clearly shown Ill in Figures 3, 8 and 9 are the stems or shafts 7 of scraper-blades 8, figuresQ to 7 inclusive,

suchstems or shafts being disposed between the several disks 9 in the positions most convenient for the required operation. Said blades are properly rights and lefts in order to engage the concave surfaces of the r disks of the gangs as placed.

. The form of the scrapers is illustrated in theseveral figures, 2 to 7 inclusive, the general outline being madeclear in Figure 3. One edge is securely bolted to the stem 7 while an opposite edge 11, before thelblade bent into the form shown, and to be described, is substantially parallel to the bolted edge. The top edge 10 is slightly curved from the'stem 7 as shown in plan in Figure 7 and continues into the edge 11, the latter ybeing the actual working edge to have contact with the disk. It is noted that said edge 11, Figures 2 and 5 is spirally formed,

the general line of which lies at an angle to the axis of the stern as viewed in planes at right angles to each other and at an angle,

face in the position shown.

therefore, to the axis of swinging movement of the blade. The general form of the scraper-blade may be likened to a longitudinal section of a hollow cone since it is bent from a small curve, at 12, Figure 3, such curve gradually spreading to longer curves. as denoted by the shade lines in said figure, v This is with the whole purpose of creating the spiral edge 11 presented to the disk-sur- The face of the blade lies at right angles to the, said disksurface as shown in Figure 7 the edge 11 lying squarely upon such surface, the arrow in this figure showing or indicating the direction of disk rotation. Clearly, the wear of the disk on the scraper" is at right angles to whatfmay be termed the plane of the scraper and the edge 11 never changes its.

form, the proper scraping action being maintained indefinitely. In presentmg the edge 11 to the disk the lower corner of said edge first engages the adhering matter nearest the disk center and in a continued movement toward a full contactprogressively removes the material in a spiral cut outward toward the perimeter of the disk, this progressive engagement of the scraping edge with the disk surface is due primarily to the shape of the scraper, the angle of the edge 7 11 with respect to the disk surface and pivotal mounting of the blade, and the 'man- I ner' in which thescraper is moved into ongagementwith the diskf As shown in Fig.

'7, it will be apparent that movement of the about-axis 7 willcause said edge port-ion to move to aiposition obliquely across the disc surface and progresslvely'engag'e the ent1re edge 11 therewith. The advantage of this action is that when an entire series of scrapers is moved to scrapingposition the entire load of material is not suddenly attacked, since to do so, especially when the soil is of a sticky or gummy nature, would greatly increase the draft on the implement.

The-form of the scraper and the position in which it may be mounted is advantageous in that, as shown in Figure 7, the edge 11 can be made to engage the outer or convex surface of an adjacent disk and remove the dirt from that part of said surface that prevents proper functioning of said disk in the soil. The dotted lines a a in said Figure 7 designates substantially the zone of scraping action, The position of the stem 7 between the disks may vary according to the form of the scraper audits ability to serve in both the capacities named. v p I There is included with the several scrapers a control mechanism by which I am enabled, preferably, to operate certain set-sor series of said scrapers, the others being allowed to remainidle; To this end there is journaled upon the tongue or draft device 2 a rock-shaft 13. This lies along said tongue and has a pair of upstanding arms 14L and 15 disposed somewhat in the rear of the positions of the gangs 5. V Secured to the upper end of each stein7 is an arm 16preferably capable of flexingfand may be made, therefore, of spring metal. These lie substantially parallel to one another, having reference, of course, to those of a given series, and each is pivotally connect edto a bar 17. Connected to said bar by a pivot bolt 17 for eXa1'nple,:is.a link 17 2 one end of which is slotted to receive one of the arms 14, At the point of pivotal con-. nection of the arm 16 with the bar 17 the latter is slotted as at18, Figure 8, whereby, an adjustment of the said arm may be made. withrespect to such bar. By a study of Figure 1 it will be seen that twoof the bars are controlled by each of the arms 14:, 15 of the rock-shaft. As arranged, it is clear that if the rod 13 is rocked so as to swing the arms 14, 15 toward the right, for example, the left front bar 17 andthe right rear bar 17 will both be shifted toward the right,.the other two bars 17 being unaffected. Similarly, in the movement of the said rod 13 to swingthe' said arms 14:, 15 toward the left the right forward and the left rearward bars 17 -will b Operated without movement of the other two. In use, all of the scrapers are preferably kept free oftthe disks, though, of course, this need not be followed necessarily. However, i'fInorm'ally'out of contact and it is necessary to clean the disks it is preferable to operate two of the series of scrapers at a time only. That is to say, the front series at the the rock-shaft is moved in one direction the two series of sorapersfirst namechfor example, may be'actua'ted, while an opposite dlrec' tion of movementwill aii'ect the other two.

series. find an extreme movement in either tlii'ec'tionavill result in the scrapers acting upon the convex suriaces of adjacent disks as explained earlier. I

A hand "lever 20 on the rock-shaft serves to impart movement thereto and may be set in a desired fixed position by any'usual or well known latch arrangement 21, this being sutiiciently well knownto require no. detailed drawing thereof. 1

In assembling the scrapers upon the implement their arms 16 maybe adjusted to proper positions on the bars 17 to the end that the scrapers will have the proper relation to their respective disks and so that, when the lever 20 is fixed by the latch mechanism mentioned, they will have the desired yielding contact under all conditions.

In Figures 11 and 12 is shown a modified form of scraper operating mechanism wherein 121 is a hand-lever suitably pivoted at 22 on the tongue 2, for example. One end of the lever is made flexible by twisting a flat portion 23 in a vertical plane so as to lie perpendicularly to stresses to be placed upon it to be understood later. This end of said lever is pivoted to one end of a short lever 24 pivoted between its ends at 25 on the said tongue. At 26 is a similar short lever also pivoted between its ends on the tongue at 27. This is spaced from the lever 24, and an in termediate' lever 28 is pivoted at its middle and has pivotal connection at its endswith adjacent ends of the short levers as shown. In the present instance each of the bars 17 that control the scrapers is attached to one of theends of the two levers24e and 26. It will be seen that the lever system is such that. when the hand lever 21 is moved toward the right, Figure 11, the short lever 24 will'be swung toward the left atits forward end and.

toward the right at its rear end. This "action shifts the bars 17 of that lever in oppo site directions and carrying the scrapers of the front pair of gangs .towardthe'concave sides of the disks of those gangs. 5 Due to the connection of the lever 2.8, ithe rearshortlever 26 will be. swung on itsipivot inthesame way, it being noted'th'atthe rear bars 17 are in positions opposite tlioseofthe' front bars so that'as shown by-the arrows both said rear bars are'shitted outwardly whereas the front ones are drawn inwardly ortoward the tongue whichmust result from the :factthat the front and rear gangs arereversed as to the positions of their disks; Though not illustrated, it is clear that there must be sutiicienttreedom of thepivot points of the lovers where they connect with one-anotherto .permit those points .to move in arcs described from the-pivots of said levers. I t

Aquadrant or sector 29' is provided "for the lever '21 and any usual latch mechaniSm 30 18811113103 86; whjerebyythesaid lever 21 may be .tixed'in a givenor desired. position.

Flexibility between the lever 21 and the mechanism operated that member. permits the scrapers to yieldto accommodate then'iselves'to'the condition of adhering-matter on the disks, or in case obstruct-ions should pass between the disks and said scrapers. The lever-2'1 made flexible, or any equivalent thereof, may be used in lieu of the arms 16 or'in connection therewith.

This form of. mechanism admits otfoper- 'ating all of the scrapers in their proper directions to a greater or lessextent, as may be desired, simultaneously with a single adjustment of the lever 21 as difiering :trom

the type first described.

I claim: 1. The combination with a harrow having a rotary harrow disk, of a scraper blade pivotally mounted on said harrow and movable into and out of engagement with said disk, said blade being curved and having a scraping edge disposed at an angle with respect to the pivotal axisof said blade,and means for ins pivotally mounted on said harrow and 'movable into and out of engagement with said disk, said blade being curved and having a scraping edge disposed at an angle with respect to the pivotal axis of said blade as' viewed in two different planes, and means for swinging said 1 blade to 'engage said scraping edge with said disk at an angle with respect to a radius of said disk, said scraping edge atone endfirst engaging said r disk and then progressively engaging at its entire edge therewith as it reaches an oblique position with respect to the radius of said disk.

3. The combination with a harrow having a rotary harrow disk, of a scraper blade piv-' otally mounted on said harrow and movable into'and out of engagement with said disk,

said blade having a substantially spirally curved scraping edge disposed at an angle with respect to the pivotal axis of said blade as viewed in planes at right angles to each other, and means for swinging said blade to engage said scraping edge at substantially right angles tot-he surface of the disk scraper blades pivotally mounted between pairs of adjacent disks, each of said blades being curved and movable into and out of engagement with the convex and concave surfaces of adjacent disks, each scraping blade being curved and having a scraping edge disposed at an angle with respect to the pivotal axis of said blade, and means for i at one end first engaging its respective disk and then progressively engaging at its entire edge therewith as it reaches an oblique position with respect to the radius .of said disk. r I r e 5. The combination in a harrow comprising amain frame and two pairs of opposed gangs of harrowing disks, of a series of scraper-blades for each said gang of disks journaled in the frame, each blade includthe scrapers of a gang, all of the arms of a gang of scrapers being connected to a member, and a common operating rod opera-- tively connected to the several members, the relation of the said rod and membersv being such that certain of the blades are selectively 5 exclusion of others ina given operated to the movement. 7

In testimony whereof I affix my signature.

JOHN H. 'FLATLEY.

lng an arm, a separate member for all of

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