Patent GB-191414455-A (GB)
Title: Improvements in or relating to Motor Ploughs.
IPC: A01B63/06
Filed: 1914-06-16
Granted: 1915-08-05
Abstract: 14,455. Stock Motorpflug Ges. July 11, 1913, [Convention date]. Ploughs. - A device for controlling the vertical adjustment of the steering-wheel of a motor plough comprises stops for automatically disconnecting the mechanism when the vertical movement is sufficient, locking - devices for preventing accidents, and means near the driver's seat for indicating the vertical position of the plough frame relatively to the steering-wheel. In the plough shown in Fig. 2, the steering -- wheel is adjustable vertically by hand or by power, a rack 15, carrying the steering-wheel 22, being raised or lowered by turning a spindle 5 by means of a crank handle 2, Fig. 4, or by actuating a lever 46 connecting a clutch 42 with one of two bevel-pinions 38, 39 on the spindle 5. The pinions 38, 39 gear with a pinion 41 driven from the motor, and a pinion gearing with the rack 15 is driven from the spindle 5 by worm gearing 77, 78, a spindle 79, and bevel-gearing 80, 81. At the end of the movement, the clutch 42 is disconnected by the engagement of one of two adjustable stops 82, 83 on the rack 15 with a two-armed lever 86, which is connected to a double lever 91 on the pivot pin of the clutch lever 46 by a wire 89 passing round guide-rollers 90. The clutch lever 46 may be locked in its -central position by a bolt 95, and the shaft 5 prevented from rotating by a bolt 96 engaging holes in a disk 98.. The handle 2 is provided with clutch teeth 107 normally held out of contact with the teeth 108 of a sleeve 109 by a spring 110. A rod 106 may be inserted between the sets of teeth to prevent engagement. The bolts or rods 95, 96, 106 are 'connected together as shown in Fig. 4, and are operated by a spring-controlled foot-lever 100. Normally the bolts 95, 96 are in operative position and the rod 106 in inoperative position. A small movement of the lever 100 disengages the bolt 96, so that the shaft 5 may be rotated by means of the handle 2, while the clutch lever 46 remains locked. A greater movement of the lever 100 unlocks the lever 46 after the shaft 5 and inserts the rod 106 between the teeth 107, 108, so as to prevent the crank-handle 2 from being thrown into action while the shaft 5 is being driven by power. The locking-bolt 95 may be dispensed with in the interlocking gear shown in Fig. 7. In this gear, the handle 2 is keyed on a sleeve 116 rotatably mounted between a collar 118 and nut 119 on a rod 117 in the hollow spindle 5. The clutch sleeve 42 .is locked in inoperative position when the handle 2 is in operative position by the engagement of a projection 121 on the rod 117 with a recess 123 in the sleeve 42, the end of the rod 117 sliding on an inclined surface 120 when the handle 2 is pushed towards the left. When the sleeve 42 is in either of its operative positions, it prevents the projection 121 from passing through the slot 122 in the spindle 5 and thus prevents the coupling of the handle 2 to the sleeve 109. The rack 15, Fig. 2, may be provided with a scale 84, and an indicator scale 114, Fig. 4, is provided on the casing 111 of the worm 77. The spindle of the pointer 113 of the indicator is driven from the spindle 79.