| 摘要 |
983,541. Agricultural implements. C. SIELING. May 3, 1961 [May 3, 1960], No. 16008/61. Heading A1B. A one-way plough comprises a wheeled chassis 2 and ploughs 16, 16<SP>1</SP> mounted on a beam 12 pivoted on an axle 2 so that when one plough is working the other is raised clear of the ground. The plough is constructed so that it has a tendency to deviate from the furrow previously ploughed and this deviation is counteracted by a wheel 5 or 10 guided in the previous furrow. Each plough 16 or 16<SP>1</SP> is carried by an arm 15 pivoted on the plough beam 12 and a servomotor 17 is provided for adjusting the position of the arm 15, the motor 17 being actuated by a valve 18 which is operated by a rod 19 which is pivoted on a second beam 20 and is provided with a disc 23, the arrangement being that the plough 16 follows the lateral deflections of the disc 23. |
