US1514700A - Seed drill - Google Patents

Description

Nov. 11 1924.

Filed Dec.

1 mm i B. s. HARRIS SEED DRILL 15, 1922 2 Sheets-Shed! l INVENTDR.

'N v."11 ,1924. I nslvmoo B. s. HARRIS TSEED DRILL Filed Dee 16, 1922' 2 Sheets-Shoot 2 as o liner BURTON HARRIS, OF TORONTO, GNTARIO, GANADA, ASSIGIEOE' TO MASSEY-HARRIS.

' COMPANY, LlIlVLITED, 6H TORONIQ, ONTARIO,CANADA.

'snnn 113.111..

Application filed December To all whom it may concern:

Be it known that I, BURTON S. l'lnnnis. of the city of Toronto, in the county of York Province of Untario, Canada, have invented certain new and useful Improvements in Seed Drills, of which the following is a specification.

This invention relates particularly to seed drill axles used for actuating means for lifting the drills to provide road clearance and my object is to so construct the axle that the wheels carried thereby will have the necessary pitch and gather to ensure an easy running machine without interfering with the operation of the drill lifting means. Further objects l have in mind will hereinafter appear.

I attain my objects by means of the constructions described, and illustrated in the accompanying drawings in whicl Fig. 1 is a plan view of a seed drill show ing my invention applied thereto;

Fig. 2 a rearelevation of the same; and

Fig. 3 a cross section of a seed drill.

In the drawing like numerals of reference, indicate corresponding parts in the different figures.

1 is the frame of the seed drillwhich is carried by the axle 21 as hereinafter described. T he disc drills 3 are journalled on the drag bars 4 which-arepivotally mounted on the forward transverse portion 1 of the frame- 011 each drag bar adjacent its disc journal is pivotally connected one end of a spring pressure bar 5, the other'end of which is pivotally connected with an arm 7 secured to the control shaft 8. lhis shaft is formed in two parts each part being journalled on the frame and adapted to be rocked to raise and lower the discs at its end of the machine.

To mechanically ope ate the control shaft 8 from the axle 2 I provide the following means. At each end of the is carried a ground wheel 9, each wheel having a driving connection, by means of a clutch or ratchet device (not shown) with the axle so that the latter will be rotated when the machine is turning a short corner and only one wheel is in motion. In front of each half of the control shaft 8 is a clutch 11 suitably carried on the frame. As these clutches are old in the art and are shown in United States Patent 1,168,143, only a brief description is given. Each clutch is provided is, 1922. Serial No. 607,449.

with a constantly rotating part, having a sprocket 182. secured thereto. This sprocket is driven by means of a chain carried by a sprocket 1 secured to the axle 2. Each clutch is also provided with a shaft 1 1 having a crank 15 formed on its free end and this crank is connected by means of a link 16 with. the arm 17 secured to one half of the shaft The rotation of the crank shaft 14 from the sprocket wheel 18 is controlled by means of a projection 18, carried on a pivoted arm 19, adapted to engage either oneof a pair of spaced fingers 20 pivoted on the part of the clutch which carries the shaft 1 1. lhese fingers are substantially diametrically opposite one another and' when the arm 19 is rocked to disengage the projection 18 from itsfinger, the latter au tomatically throws the clutch into gear. his rotates the cranlr shaft 1% through an arc of substantially 180 then the second lingerie automatically engaged by the projection 18 to throw the clutch out of gear.

To disengage the rollers 18 from the fingers 20 the arms 19 are each provided with a pair, of holes 21 positioned so .hat the arm may be pulled forward or pulled upward to swing it on its pivot by a cord 24 secured to either one pair of holes to opcrate the clutches from a tractor in front of the seed drill or from a position behind the seed drill.

Assuming the discs to be raised out of the ground as shown in Fig. 3, it is evident that a pull on the cords will throw the antifriction rollers 18 out of engagement with one pair of fingers 20 and thus throw the clutches into gear so that the crank shaft 14: is rotated to rock the control shaft and lower the discs into the ground. It is necessary to hold the rollers 18 away from the clutch until the fingers 20. that have been in engagement with the rollers. are rotated sufficientiy to clear the rollers when the latfor are released and springs 23 hold the rollers in position against the periphery of the clutch so that they drop into engagement with the other pair of fingers 20, when the clutch has been rotated through an arc of 180, and thus throw the clutch out of gear. hen it is desired to raise the discs again the rollers 18 are disengaged from the second pair of fingers 20 and the clutch is rotated until the first pair of fingers become engaged by the rollers.

i i i This method of lifting and lowering the discs out of and into the ground is old in the art but heretofore it has been the custom to use a straight axle mounted transversely on the frame and rotated by either wheel. This straight axle has proved a failure on account of it bending out of line due to the weight of the seed carried by the seed box 25 and thus throwing the wheels 9 out of line. To overcome this objectionable feature I provide an aXle which is driven by either wheel and the end portions of which are set at an angle to the horizontal and to the vertical to give the wheels the desired pitch and gather. This axle is formed in three parts ;-a centrally located portion 2 which portion is journalled parallel -with the frame on the brackets 26, and the end portions 2 which are journalled in the end bearings 27 and brackets 28. These bearings and brackets are carried on the frame and are set at an angle to the vertical and to the horizontal. The centrally located portion 2 carries the sprockets l3 and each end of this portion is connected by means of a universal joint 29 with the adjacent end portions 2 so that when either drive wheel is rotated the clutches may be operated to lift or lower the discs 3. c

To adjust the clearance of the discs 3 from the ground or the depth of the fur rows the link 16 is formed, by the'bars 16 and 16 in two parts. One part is slidably carried on the other whereby the link may be shortened or lengthened to slightly advance or retard the rocking movement of the arm 17. This is accomplished'by pivotally connecting one end of the bar l6 on the crank 15 and pivotally connecting the opposite end of the bar 16 on the arm 17. The bars are guided on one another by meansof the pin and slot connections 34:. To 'adjust one bar relative to the other and releasably lock it as adjusted I provide the hand lever 31 fulcrumed on a depending portion of the bar 16 and adapted to be releasably locked in the notched quadrant 36 formed on this bar.

' The lever 31 is provided with a laterally tion it is obvious that a movement in either direction of the lever 81 Will slightly rock the shaft 8 in. the same direction to slightly lower or raise the discs and thus cause them to be further lowered into the ground or further raised from the surface of the gound on the next semi-revolution of the crank 15.

ll hat I claim as my invention is 1-- l. A seed drill provided with lifting meansfor the drills including an adjustable link formed in two parts suitably guided on one another; a notched quadrant formed on one part; a clever pivoted on the last mentioned part and adapted to be engaged with the quadrant; and a pin and slot connection. between the lever and the other part whereby one part of the link may be moved relative to the other.

2. A seed drill provided with lifting means for the lrillsincluding an vadjustable link formed in two we, suitably guided on one another, one part havingv a slot formed therein; a notched quadrant formed on the other part, said part having an arcuate slot formed therein; a lever pivoted on the last mentioned part and adapted to be engaged with the quadrant; and a pin carried on'the lever passing through said arc-uate slot and engaging the first mentioned slot.

Signed at Toronto Canada, this 28th day of November, 1922. l

BURTON S. HARRIS.

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