Patent GB-190407392-A (GB)
Title: Improved Method and Machinery for Excavating and Conveying Earth and other Materials.
Inventor: DUNLOP GEORGE HENRY
Filed: 1904-03-28
Granted: 1905-03-16
Abstract: 7392. Dunlop, G. H. March 28. Skips, &c.-Re. lates to a method of excavating by dragging a scoop and consists in operating the scoop for exca vating and dump ing from the traction engine or other dragging- appliance by means of cords, chains or racks and pinions; or a frame, mounted or the draught line of the scoop, may carry the gear for operating it. Fig 1 shows one form of apparatus, in which the scoop S, fitted with brackets s and drawn by a chain D, is operated by a cord C, which is wound over a pulley mounted in a swivelling frame y, to allow for turning bends, and on to a drum c. Fig. 1f shows the swivelling frame in front elevation. The scoop may be made with a bent or curved bottom, the draught line may be a rigid bar, rollers may be used instead of the brackets s, and the winding-engine and mechanism for the controlling-line may all be mounted in a swivel frame. The controlling-tine may be wound on a drum c, Fig. 3<c>, and pass between vertical guide-rollers m to allow for turning. Fig. 4 shows the scoop drawn by a bar D and operated by two controlling-lines C, C', the scoop being provided with a frame A to which one controlling-line is attached for the purpose of giving a more effective turning section. Fig. 5 shows a strut C<2> on which the pulleys for guiding the controlling-lines C, C<1> are mounted on a pivoted frame, and the lines are both connected to the frame A. With this arrangement and an extensible draught line, excavating may be performed when the traction engines or other drawing-appliance is stationary. Fig. 7 shows the scoops fitted with (1) wheels W to facilitate transit, (2) rollers w instead of brackets s (3) an end gate G operated by chain gearing g<3>; the scoop is operated by a chain C working on a sprocket-wheel e. The strut rests on rollers on a cross-bar carried by the frame A, and a spring v is interposed in the chain C to reduce the shock when reversing. Fig. 8 shows a controlling-line formed of a toothed rack C. Fig. 10 shows a wheeled scoop of the ordinary type, which is operated by moving a lever through an angle of about 90‹ in conjunction with a latch. The controlling-line C moves the lever L, and the latch l, which engages in a latch box l<2>, is operated by a latch line P. As shown in Fig. 11, the controlling-line is a strut C, and the scoop is worked by varying the length of the draught line D. The controlling-line and the draught line may both be extensible so that the tractor may remain stationary while soft earth is being excavated. The framework H mounted on the draught line D, Fig. 13, may carry the controlling-line and the mechanism for operating it. Fig. 15 shows a scoop traversing a curve and drawn by chains D attached to a cross-beam at the end of the tractor, and to the sides of the scoop, instead of the centrally-attached draught line as before described. The controlling-line may be similarly attached. Fig. 16 shows a scoop with a draught line attached to the sides, and the strengthening-rib K to permit the use of an end gate. Fig. 17 shows a scoop fitted with a holding-down rod C<2> to ensure the action of the front of the scoop on the ground.