Patent GB-404206-A (GB)
Title: Improvements in or relating to apparatus for making drains and like water-conveying conduits
IPC: E02F5/10
Filed: 1933-06-02
Abstract: 404,206. Implements for working land. WARMING, K., 48, Vester Boulevard, Copenhagen. June 2, 1933, No. 16021. [Class 6 (i). Apparatus for making drains and like water conveying conduits includes a hollow coulter e for cutting a narrow ditch or channel in the ground and means for filling the groove wholly or partly with a granular drainage material comprising a supply hopper h for the granular material so arranged and connected to the coulter that the feed of material from the hopper through the coulter cavity and into the channel takes place by gravity alone. The drainage material may be sand, gravel, shingle, pebble &c. The supply hopper and the coulter are carried by a long slide a, which may comprise two beams of U-shaped cross-section connected by a steel plate a<1>, of such proportions that the pressure on the ground level while the plough is working does not exceed 1.4 -2.8 pounds per square inch. The hollow coulter e may have a rearwardly and downwardly facing outlet i and may consist of a bent steel plate the front edges of which are welded to single cutting blade f, Fig. 3, or to a double cutting blade g, Fig. 4. The coulter e and the hopper h provided on the upper end thereof may be mounted between the arms k of a pair of bellcrank levers pivoted about a shaft l, the other arms k<1> of the bellcrank levers being connected to mechanism for adjusting the inclination of the coulter. This adjusting mechanism may include a guiding bar m pivoted to the arms k<1> by a bolt m and forming a nut for a screw spindle n fixedly connected to a shaft n<1> carrying a hand wheel o ; the spindle and shaft are journalled to rotate but are not longitudinally displacable in a bearing p having two lateral pins p<1> sliding between the slots of two U-shaped horizontal guiding rails q on a bracket q<1> carried by the slide a. In this way it is possible to give the conduit a suitable inclination relative to the ground surface by gradually swinging the coulter about the pivot and also because of the position of the outlet i there is secured a gradually increasing crosssectional area of the drainage material as the depth of the conduit increases. A vertical circular steel disc or cutter b may be rotatably mounted on the front part of the slide to cut the turf or ground to facilitate the passage of the coulter therethrough. The cutter b may be mounted on a shaft d<3> journalled in a U-shaped frame d pivotally mounted on a shaft d<1> so that the depth of the cutter be varied, the frame d being locked in the desired position by means of a locking pin passing through holes d<5> in two curved arms d' rigidly secured to the slide and through corresponding holes in the frame d. A toothed wheel c may be provided in the shaft d<3> so that the teeth engage the ground and thus during the forward movement of the plough rotate the cutter b. When a coulter having double blades is used and the coulter is adjusted to a suitably inclined position the earth slides upwards between the blades and is forced through a slot in the plate a<1>, two rearwardly inclined flaps r and two laterally inclined flaps r<1> facilitate the discharge of the excavated earth from the slide. The slide may be drawn by a windlass or tractor, steering being effected by handle bars s. A seat t may be provided for the operator. Travelling wheels may be provided.