US688808A - Grain-drill. - Google Patents

Description

Patented Dec. l0, 190|.

J. L. AsHusT.

GRAIN DRILL.

(Application led Sept. 6, 1901.)

(No Model.)

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NITED STATES y ntic JOHN L. ASHURST, OF HAVANA, ILLINOIS, ASSIGNOR TO LEWIS B. ASHURST,

GRAIN- OF KILBOURNE, ILLINOIS.

DRILL.

SPECIFICATION forming part of Letters Patent No. 688,808, dated December 10, 1901. Application filed September 6, 1901. Serial No. 74,538. (No model.)

To @ZZ whom it may concern:

Be it known that I, JOHN L. AsHURsr, of Havana, in the county of Mason and State of Illinois, have invented certain new and useful Improvements in Grain-Drills, of which the following is a specication.

This invention relates to grain-drills coinposed oftwo frames hinged together, the front frame beingsupplied with furrmV-Upeners and 1o seed-drilling mechanism and the rear frame being mounted on wheels which develop the force used to drive the drilling mechanism and which carry the front frame While turning around.

The invention is particularly applicable to press-drills used to plant wheat, oats, and the like; but in its broadest sense itis also applicable to planters used to drill corn.

My principal object is to make it ilnpossi- 2o ble for the clutch of the drilling mechanism to be thrown out of mesh while the drill isin operation, and I attain that and other incidental results in lthe manner hereinafter explained.

The ,invention is exemplified in the structure hereinafter described, and it is delined in the appended claims.

In the drawings forming part of this specification, Figure 1 is a side elevation showing 3o in broken lines so much of a press-drill as is needed in the description of my invention and also showing essential details in solid lines. Fig. 2 is the same as Fig. l, excepting the relative positions of parts, the front frame being lowered in Fig. l and raised in Fig. 2.

Fig. 3 is a detail in plan of the clutch preferably used in the particular drill herein described.

The lever lis typical of the lift-levers corn- 4o inonly used in grain-drills and corn-planters, and its distinctive feature is its connection with the front frame. This connection provides for a limited amount of swing in the lever independent of the front frame, and it is exemplified by a pivotal conjunction with some part of the rear frame and a iiexible hitch, as chain S, extending forward from the lever and connecting directly or indirectly with the front frame. In this instance the 5o lift-lever is pivotally connected with a footlever 9 back of the fulcrum thereof, and the chain is connected with the foot-lever in front of the fulcruln thereof. The lift-lever may swing forward independent of the foot-1ever and of the front frame with which the foot-lever is connected; but it cannot swing backward lo its fullest extent without the front frame has been previously raised or without raising such front frame. A chain 2 or other fiexible connection extends forward 6o from lift-lever l and connects in some suitable manner with so me suitable form of clutch used to make and break connections between the axle-shaft 13M' the rear frame andthe drill-shaft l2 of the front frame. The con- 65 nection of the chain 2 with the clutch of the drill is such that extreme backward swing of thelift-lever will disengage the clutch; but apart from that essential characteristic the clutch and the connection therewith may be 7o of any desired form, so far as the broad scope of the invention is concerned.

In Fig. 3 is shown a form of clutch and a means for connectingthe chain 2 with the clutch which I havefound to work well on the particular drill outlined in Figs.` l and 2, and the details of such clutch and connection are as follows: A counter-shaft is shown at 16. Chain 14 conveys motion from a sprocketwheel on drive-shaft 13 to a sprocket-wheel 8o mounted loosely on the counter-shaft and provided on its hub with clutch projections. Chain 15 runs from a sprocket-wheel fixed on the counter-shaft to a. sprocket-wheel on the drill-shaft l2. Clutch-sleeve 7 is splined onto 85 the counter-shaft and provided with projections to engage the clutch projections of the hub of the loose sprocket-wheel. An arm 6 is hinged at its upper end to the seedbox, and its lower end engages an annular groove in 9o the clutch-sleeve. An L-lever 4 and 4a is fulcrumed below the seedbox. A link 5 connects arm di of the L-lever with the swinging arm 6, and the chain 2 is connected with arm /lof the L-lever. A spring 17 tends to hold the 95 clutch sleeve 7 in clutch with the loose sprocket-wheel, and under these conditions motion is imparted to the counter shaft through the chain 14, the sprocket -wheel thereof, and the clutch sleeve, while the roo chain 15 takes the motion of the countershaft to the drill-shaft.

The foot-lever 9 connects with extension l1 of the tongue of the drill through link 10.

When the front fra me ofthe drill is lowered, as shown in Fig. 1, the lift-lever swings forward sufficiently far to give considerable slack to chains 2 and S and the runners may follow irregularities of the ground, as great as are ever met in actual operation, without taking all the slack out of chain 2 while descending into depressions. On the rise of the runners in riding over elevations the slack of the chains is increased, and the front frame may rise as high as it is heldin turning around without affecting the clutch. The front frame may be raised by pressure applied to the footlever 9, in which case the lever l will rest in the position shown in Fig. 1 until pulled back -by hand to lock the front frame in a raised position; but ordinarily the pressure is applied simultaneously to the footlever and the hand-lever. In the case last named the slack will be taken up in chain 8 and the pull on the hand-lever will be imparted to the foot-lever and thence to the front framel before the chain. 2 is tightened sufficiently to affect the clutch. As the raising of the front frame continues the slack of chain 2 is taken up, and with the final raising motion of the front frame the clutch is shifted by the pull not' the chain.

The lever' 1 is locked at its extreme backward swing, preferably by being swung sidewise into engagement with a notch in a bar 18 on the frame, and it holds the front frame raised and the clutch broken until it is released. The chain 2 preferably -runs over a pulley 3, suitably journaled in the rear frame. t

I claim- 1. Front-frame-raising and clutch-shifting' mechanism for grain-drills of the class described, comprising a lift-lever having a limited amount of free swing and a flexible connection between the lift-lever and the clutch.

3. Ittont-fi'aine-xaising and clutch-shifting mechanism for grain-drills of the class described, com prisinga lift-lever pivotally connected'with the rear frame, and connecting with the front fraine through a chain that permits a limited amount of free swing in the lever, and a chain connecting the lever with the clutch and acting on the clutch when the lever is thrown back to complete the raise of the front frame.

4. Front-frame-raising and clutch-shifting mechanism for grain-drills of the class described, comprising a foot-lever on the rear frame connected with the front frame, a handlever pivoted on lthe foot-lever, a chain eX- tending forward from the hand -lever and connecting the hand-lever with the foot-lever, and a flexible connection extending forward from the hand-lever to the clutch.

5. Itront-frame-raising and clutch-shifting mechanism for grain-drills of the class described comprising a counter-shaft on the front frame, achain running from the shaft of the rear frame to a wheel on the countershaft, a chain running from the counter-shaft to a wheel on the drill-shaft, a clutch on the counter-shaft to make and break the train of force-transmitting gearing connecting the drive-shaft with the drill-shaft, a lever to lift the front frame and a iiexible connection between the lift-lever and the clutch.

In testimony whereof I sign my name in the presence of two subscribing witnesses.

JOHN L. ASIIURST.

Vitnesses:

H. G. BRUNING, J. B. FAGER.

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