US633960A - Grain-drill. - Google Patents

Description

No. 633,960. Patented Sept. 26, 1899.

L. L. HAWORTH'. I

GRAIN DRILL.

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and the drag-bars and depressing-springs UNITED STATES P TENT Or fice.

LYSANDER L." nAWoRTH, or DECATUR, ILLINOIS.

e RAIN-DRILL.

SPECIFICATION forming part of Letters Patent No. 633,960, dated September 26, 1899. Application filed August 16, 1899. Serial No. 72 7,396. (No model.)

springs used to yieldingly depress the f urrow-' openers of a grain-drill. It is exemplified in the structure hereinafter described, and it is defined in the appended claims.

In the drawings forming part of this specification, Figure 1 is a side elevation ofso much of a grain-drill as is needed to explain my in- Fig. 2 is a plan of a furrow-opener therefor. Fig.3 is a sideelevation of a furrowopener, drag-bars, and depressing-springs, showing certain modifications in detail. Fig.

dis a side elevation of the furrow-opener, the

drag-bars, and the depressing-springs, illustrating the operation thereof. Fig. 5 is a detail illustrative of a modified means for makin g the drag-bars and the springs continuous.

2 5 Fig. 6 is a plan detail showing how a springrod may be curved around a seed-tube to form a stay therefor. 7

The invention is confined to the drag-bars and depression-sprin gs, together with the neo- 0 essary adjuncts thereof, and .it resides primarily in a draft-rod, as 4, connected with a furrow-opener 1 and extended obliquely upward and forward therefrom. Near its upper termination the draft-rod diverts rearward to form the approximately horizontal portion 4, which converges into the circular bend at, and then extends rearward as a spring-rod 4. The forward portion of the spring-rod rests on the horizontal extension 4 of the draft-rod and its rear end swings free. The entire rod of which the drag-bar and the depression spring are formed is elastic, being preferably made of spring-steel, and the drag-bar portion is preferably larger 5 in cross-section than the spring portion. This constitutes the unit of the invention, the peculiarities of which are the continuity of the drag-bar and the spring-rod, the formation of the pivot-bearing by the bend at of the rod, and the rest or fulcrum t for the springrod. The continuity of the rods where one is larger than the other is preferably established by welding; but it may be established by the intervention of a casting, as 23 in Fig. 5, which forms the pivot bearing and with which the rods are firmly connected.

The bend i 'ofthe combined draft-rod and depressing-rod encircles a horizontal shaft 3 of the drill-frame, the rear end of the draftrod connects with the furrow-opener 1, and the rear end of the depressing-rod connects, indirectly, with a hand-lever. v The furrowopener is, in this instance, of the runner type, and it requires to be held firmly against side tilt to keep it in'its operative position. To provide for this, each runner is supplied with two draft-rods which diverge toward the shaft 3 and form a wide truss-like connection between the runner and theshaft. Inthis instance both of the draft'rods contin ue rearward as depression-rods but either one of the depression-rods may be made strong enough to depress the runner-and the other one may be omitted.

When pressure is applied downward on the rear end of the depres'sing'rod or rods,the shaft 3 serves as a fulcrum and the force given to the depressing-rod is imparted to the draftrod through extension 4, with which the depression rod is in contact, either directly or indirectly. The depressing-rod bends downward, as shown in Fig; at, imparting its pressure yieldingly to the draft-rod and to the runner, and the draft-rod bends downward slightly between its ends, as shown in the same figure. causes the front end of the runner to descend nearly as rapidly as the rear end, thus maintaining a practically uniform relation of the edge of the runner to the line of draft regardless of the depth of penetration of the runner into the soil. In other words, the tilt of the edge of the runner incident to the oscillatory swing of the draft-rods is neutralized to a considerable extent by the spring of the Thebend in the draftrod proximatelya uniform angle withthe surface of the ground.

In raising the runner clear of the ground the depressing-rods are lifted upwardand the lift is, imparted to the runner through the drag-bars.

pression-rods may be clamped to the extensions 4 of the drag-bar, as shown at 22 in To facilitate this action, the de- Fig. 3, or, which I prefer to do, a flexible connection 7 may be made between the depressing-rods and the front end of the runner.

The adjuncts of the depression-rods and drag-bars, whereby they are put in practical operation in a drill, are immaterial and capable of variation; but good results may be attained by following the details shown in the drawings, where a seed-conveying tube is shown at 2, a clamp-bracket on the ends of a pair of depressing-rods is shown at 8, and a pair of upward-extended lugs on the clampbracket are shown at 0. A rock-shaft 14, journaled in the drill-frame, hasa rearwardextending arm 13, and a bar 10 extends from the arm to the lugs of the clam p-bracket. The arm is preferably slotted to receive the upper end of the bar 10, and pins 11 and 12, through the bar on opposite sides of the arm, provide bearings for the arm. An arc-formed rack 15 is fastened on the frame, and a hand-lever 16 on the rock-shaft has a catch or pawl 17 to engage the teeth of the rack. In thisinstance the hand-lever is bent, and agrip-lever 18 connects with catch 17 through rod 19, bellcrank lever 20, and rod 21; but this is immaterial. The draft rods are fastened to a bracket 5, which is fastened to the runner, and the chain 7 extends from an eye 6 on bracket 5 to the clamp-plate 8.

The chain 7 is extended obliquely downward and forward from the rear endof the spring-rods and is connected with the runner or with the draft-rods. By this provision the motion of the upper hitch of the chain is not directly toward the lower hitch and the slack in the chain created by the downward swing of the spring-rods is not great enough to cause the chain to gather trash.

If desired, a rib 2 may be formed on the front of tube 2, as shown in Fig. 3, and an extension 8 of clamp 8 may be made to straddle the rib and stay the tube.

continuous rod bent at the conjunction of the spring with the draft-bar to form a pivot-100p.

3. A draft-bar and depression-spring for a furrow-opener of a grain-drill, formed of a continuous rod bent at the conjunction of the draft-bar with the spring to form a pivotloop, the draft-bar being extended in contact with the spring for some distance from the pivot-loop to form a bearing for the spring.

at. A continuous draft-bar and depressionspring for a furrow-opener of a grain-drill, in the form of an elastic bell-crank lever.

5. A continuous draft-bar and depressionspring for a furrow-opener of a grain-drill, forming an elastic bell-crank lever the draft member of which is of greater thickness than the depression-spring member.

6. In a grain-drill, the combination with a drag-bar and rearward-extended spring-rods connected with the drag-bar of a flexible connection extending obliquely forward and downward from the spring to the drag-bar, or to the furrow-opener with which the drag-bar is connected, whereby the slack in the flexible connect-ion incident to downward motion of the spring is lessened.

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

LYSANDER L. HAW ORTH.

\Vitnesses:

FRANK S; DODD, L. P. GRAHAM,

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