US537634A

US537634A - davis

Info

Publication number: US537634A
Authority: US
Publication date: 1895-04-16
Anticipated expiration: 1912-04-16

Description

(No Model.) 2 Sheets-Sheet I.

I'. E. DAVIS.

SULKY PLOW. No. 537,634. Patented Apr. 16, 1895.

(No Model.) I 2 vSheets-Sheet 2. P. E. DAVIS.

SULKY PLOW. No. 537,634. Patented Apr. 16, 1895i.

i NtraN STATES PATIENT erica.

FRANK E. DAVIS, OF LA GROSSE, WISCONSIN, ASSIGNOR TO ALBERT HIRSHHEIMER, OF SAME PLACE.

SU LKY-PLOW.

SPECIFICATION forming part of Letters Patent No. 537,634, dated April 16, 1895.

Application filed J une 5, 1894:. Serial No. 513,512. (No model.)

To all whom t may concern.-

Be it known that I, FRANK E. DAVIS, of La Crosse, Wisconsin, have invented certain new and useful Improvements in Sulky-Plows, ot' which the following is a specification.

This invention relates to wheeled plows; and its object is to provide a simple and etlicient means for giving a proper adjustment in lowering and raising the plow.

In carrying out the invention, the forward part of the plow beam is mounted upon the usual bail or crank axle, and the rear end of the beam is supported by means of an arm extending rearwardly from the beam and working upon a guide, the guide or arm having such form as will give the desired movement to the rear part of the beam, when the beam is swung upon its bail or forward support.

The invention further consists in means employed to assist in lifting the plow and in a stop for regulating and limiting the movement of the lifting lever. v

The invention is illustrated in the accompanying drawings, in which- Figure 1 is a perspective view of the plow, a part of the draft tongue being broken away. Fig. 2 is a partial plan view of the frame, parts being broken away and others omitted. Fig. 3 is a detail view in perspective of the arm and guide which support and control the movements of the rear part of the beam. Figs. l and 5 are detail views of a slightly modified construction of the arm and guide; and Fig. 6 is a detail in elevation of the lifting lever stop.

rIhe plow beam 7 is mounted near its forward end upon an ordinary crank axle or bail 8, which isoperated in the usual manner by means of a lifting' lever 9. The beam being raised or lowered by the turning of the bail, it at the same time moves backward or forward to a corresponding extent. The rear end of the beam is controlled in its movements by means of an arm 10, which is adjustably connected by means of a slot in its forward end and a bolt 11 with a bar 12, which is clamped to the beam 7 at two points 13, 14. The arm 10, in the preferred construction, is curved upwardly from a point near its connection to the beam, its main portion thus standing obliquely to a horizontal plane and its rear end is extended in a horizontal plane. This arm is provided with a slot 15 extending longitudinally, the major portion of the slot being in an oblique plane but terminating in a short horizontal slot. The sides of the slot form cams to guide and direct the movement of the rear part of the plow beam and plow, as the front end of the beam is swung on the bail or axle.

I will rst describe the construction of guide shown in Fig. 3, in which a slotted standard 16 is slidably mounted upon a bolt4 17, which bolt also passes through a casting 18 secured to the frame 19. The slotted standard 16 carries at its upper end a pin 20, which passes through the slot in the arm 10 and is provided with a head preventing the separation of the arm and standard laterally. The slotted standard 16 also has a series of `apertures 2l, in either of which a break pin `22 may be applied, preferably in one of the lower apertures, so as to form a stop to limit the upward movement of the standard 16 when the plow meets an obstruction suiicient to lift it but'so unyielding as to break the pin 22. A square bolt 22a may be fixed in one of the upper apertures 21 to form astop to limit the downward movement of the slotted casting 16, while leaving the latter free to slide if desired; or by adjusting the bolt 17 the casting 16 may be left free or so set as to slide with some friction, or it may be locked to the frame. By changing the bolt 22L to a difterent aperture the point of the plow may be limited as to its positions, the object of the construction being to raise and lower the front part of the beam to a greater extent than the rear part and in a different direction at different stages of its movement.. It will be seen (assuming the parts to be in the position shown in Fig. 3) that if the bail be rocked by means of the lever 9, raising the forward end of the beam and thrusting it rearwardly, the slotted arm 10 will be moved back, the pin 20 riding in the upper horizontal portion of the slot 15 until the plow is freed from the furrow slice. In this movement the point of the plow will be raised, thus facilitating the freeing of the plow from the ground. The further backward movement of the bail and slotted arm 10 will cause the pin IOO to enter lthe oblique portion of the slot and the thrust will cause the arm to ride upon the pin, thus lifting the hee-l of the plow clear of the ground. The length of the slot is equal to the maximum range of movement of the swinging bail on which the front end of the beam is mounted, and hence as the bail is swung the slotted arm will travel back 0r forth a corresponding distance, thus raising or lowering the heel of the plow. The horizontal portion of the slot 15 is of such length as to free the plow from the furrow slice and raise the point before the lifting of the rear begins.

The slotted standard 16 is not intended to be rigidly secured to the frame but may rise or fall to compensate for such movements of the plow as will occur from the striking of obstructions in plowing, while the pin 22 prevents the plow from being lifted out of the ground except when it strikes such an obstruction as would break the pin, which isordinarily made of wood and intended to break when the point ofthe plow strikes an unyielding obstruction.

The arm 10 is adjustably connected to the bar 12 in order to permit the easy assembling of the parts and avoid nicety in drilling holes in the several castings.

In the construction shown in Figs. 4 and 5, the standard 1G is provided with an apertured lug 16n through which aperture a bolt 23 passes. The upper end of bolt 23 is headed and its lower end carries a pin 24, corresponding to the pin 2O in the construction shown in Fig. 3, which pin passes through the slot in the arm 10, connected to the beam in the same manner as previously described. A spring 25 is coiled about the bolt 23 and has a bearing at its upper end on the lug 16 andV at itslower end on the arm 10. When the plow encounters any obstruction sufficient to lift the heel of the plow, the arm 10 will thrust the bolt 23 upwardly, compressing the spring 25, the function of the spring being to cushion the thrust. The limit or break pin may be used as in the previous construction.

It will be understood that other modications may be made in the manner of guiding the rear end of the plow in its vertical movement. Thus, instead of employing a slotted plate working over a pin secured upon the standard, the standard might have a slotted way to receive a pin carried by the arm 10; or said arm might work between antifriction rollers and its upper edges form cams to give it the required movement.

The lifting of the plow is facilitated by means of a spring arm 26 attached to the side 'frame of the plow and having one or more spiral turns, the spring arm extending forward to a position over the clasp 14 by which the beam is secured to the bail or crank shaft. A chain 27 connects the forward end of the spring arm to this clasp, and the spring arm thus assists in lifting the plow. The tension of the spring may loe varied by engaging different links of the chain over the end ofthe spring arm. v

Another feature of improvement is a stop lock u ,ed upon the lifting lever ratchet. It is often desirable to so arrange the ratchet that the lever shall be caused to stop always at the same point so as to engage the movement of the plow in order to cut at all times the same depth of furrow. This stop lock consists of a curved plate 27 to which the segment ratchet 2Sis secured, and of which it forms a part. This curved plate has upon one side a lug or projection 29 adapted to tit one of the notches of the ratchet and to extend above the same a sufficient distance to engage with the pawl of the lifting lever 9 and prevent its further movement. 'llo enable the easy adjustment of the locking device the curved plate has a longitudinal slot 30 therein, and through this slot and a hole in theframe a bolt 3l is passed, whereby the plate may be secured at any desired point. The bolt 31 is made somewhat longer than the thickness of the two parts through which it passes, and between the under side of the frame and the nut there is coiled around the bolt a spring 32 which acts to hold the head of the bolt down upon the curved plate, and consequently binds the latter to the frame. One end of the plate is curved upwardly, as seen at 33, to en` able it to be readily grasped by the lingers in adjusting it back or forth. The spring acts to hold the locking lug down in the notch in which it is placed. This stop device has the advantage that by its use the lever is left free to move in a rearward direction, its movement being limited only by the adjustable stop lock, and the plow is consequently left free to yield sufficiently, caused by meeting obstructions.

Without limiting my invention to the precise features of construction, I claim- 1. In a sulky plow, the combination with the frame, of a bail or crank shaft mounted thereon, a plow beam connected at its front end to the bail, an arm connected to the beam and extended rearwardly therefrom vand a vertically yielding guide connected to the frame and engaging the arm, substantially as described.

2. In a sulky plow, the combination with the frame, of a bail or crank axle mounted thereon, a plow beam connected at its front end to the bail, an arm connected to the beam and extending rearwardly therefrom, said arm having an ,upwardly extending longitudinal slot and a vertically yielding guide for said arm secured to the plow frame and working in said slot, substantially as described.

3. In a sulky plow, the combination with the frame, of a bail or crank axle mounted thereon, a plow beam connected at its forward end to the bail, an arm secured to the bail and extending rearwardly therefrom, said arm having a longitudinal slot extending throughout the major portion of its length in an oblique plane and terminating in a hori- ICO ontal plane, and a vertically yielding guide secured to the frame and working in said slot, substantially as described.

4. In a sulky plow, the combination with a frame, of a crank axle mounted thereon, a plow beam connected at its forward end to the crank axle, an arm connected to the beam and extending rearwardly therefrom, said arm having a longitudinal upwardly extending slot, a slotted standard slidably secured to the frame and having a pin working in the slot of the arm, and a limit pin for con trolling the upward vmovement of the standard, substantially as described.

5. In a sulky plow, the combination with a frame, of a crank axle mounted thereon, a plow beam connected at its forward end to the crank axle, an arm connected to the beam and extending rearwardly therefrom, a vertically movable guide for said arm and a spring having a bearing on the guide and on the arm whereby to moderate the thrust of the arm, substantially as described.

6. In a sulky plow, the combination with the frame, of a bail or crank shaft mounted thereon, a plow beam connected at its front end to the beam and extended rearwardly therefrom, a vertically yielding guide con neeted to the frame and engaging the arm, a

lifting lever for rocking the bail or crank shaft and a spring rod connected at one end to the frame and at its other end adjustably connected to the bail or crankshaft, substantially as described.

7. In a sulky plow, the combination with the frame, of a crank axle mounted thereon,

a plow beam connected at its forward end to the crank axle, an arm connected to the beam and extending rearwardly therefrom, a vertically movable guide engaging the arm, means for adjustably connecting the guide to the frame and a stop to limit the movement of the guide, substantially as described.

8, In a sulky plow, the combination with a frame, of a crank axle or bail mounted thereon, a lever for rocking said bail, a segment l