GB438746A - Improvements in reversible share ploughs - Google Patents

Abstract

438,746. Implements for working land. RANSOMES, SIMS, & JEFFERIES, Ltd., CHALLACOMBE, A., and BROWN, R. A., Orwell Works, Ipswich. Aug. 24, 1934, No. 24481. [Class 6 (i)] In a reversible plough having right and left hand plough bodies mounted on a beam structure adapted to turn about an axis to effect reversal of the plough bodies, the rotation being utilized to raise the beam structure relatively to two wheel standards which are independently movable vertically under control of latches, so as to cause the appropriate wheel to move into position to act as a furrow wheel for right or left hand ploughing, means are provided for operating the two latches manually by a single chain, cord, or lever, the same means being adapted to operate a stop to release the beam structure ready for reversal of the plough bodies. The beam structure 3 is mounted on an axle 4 on a draught frame 5 and is normally prevented from turning by a stop 6. The wheel standards 9 slide in sleeves 10 on the frame 5. Each pivoted latch 11 has two hooks 12, 13 to engage a pin 15 carried by arms 16 pivoted on a bracket 18 on the sleeve 10 and adjustably connected by links 19 and a lever 20 to a bracket 22 on the standard 9. The hooks 12, 13 engage the pin 15 when the wheel 7 is acting as furrow wheel and transport wheel, respectively. When the wheel 7 acts as a land wheel the pin 15 engages a bell-crank lever 24 which is adjustable, to regulate the depth of work, by means of a screw 26. Both latches 11 are tripped by pulling on a cord 43 and thus moving a ratchet lever 34 which rotates a cam shaft 30 through spur gearing 39, 36, each pull movement of the lever rotating the shaft 30 through 90‹. There are two unequal cam arms 31, 32 for each latch, the short arm for one latch coming into operation simultaneously with the long arm for the other latch and vice versa. The lever 34 passes through a slotted guide and is controlled by a spring. The stop 6 for the beam structure is pivoted and normally held in place by toggle levers and a spring. It is moved by the engagement of one of two cam arms on the shaft 30 with one of the toggle levers. Backward rotation of the beam structure is prevented by a pivoted latch above the stop 6. Each standard 9 may be connected to the draught frame 5 by a spring 56. It may normally be prevented by a key from rotating in the sleeve 10, being however free to castor when the wheel 7 is in transport position. In a modification the latch-pin 15 is adjustably connected to the bracket 22 by an adjustable screw connection.