Patent GB-599212-A (GB)
Title: Improvements in or relating to loading and stacking apparatus
IPC: A01D87/08
Filed: 1945-07-27
Abstract: 599,212. Hay-loaders. TEAGLE, W. T. July 27, 1945, No. 19295. [Class 6 (iii)] [Also in Group XXX] In loading and stacking apparatus of the kind in which a collecting and transporting device such as a sweep is pivoted to the free end of a jib pivotally mounted on a tractor and manually releasable locking means is provided for retaining the sweep in its normal operative position, the locking means comprises a toggle device mounted on the end of the jib and engaging an abutment on the rear end of the sweep. The machine described is used for the collection of hay, corn and like material, but if the sweep is replaced by a device similar to a large farmyard fork, manure may be transported while the substitution of a scoop-shaped device enables earth, sand, gravel, artificial manure, sugar beet, &c. to be dealt with. A flat platform is used when sacks, bags, boxes, bricks and builders' materials are to be handled. The sweep, Figs. 1 and 2, comprises a series of prongs 9 supported by a frame 8 which is pivoted at 55 in brackets 10 mounted on the free ends of channel members 4 forming the jib. Each member 4 is pivoted at 5 to one of the uprights 1 of a frame secured to the tractor. The prongs are held in alignment with the jib by the engagement of an abutment 56 on the frame with the lower member 58 of a toggle 57, 58, the upper member 57 of which is pivoted at 59 to a bracket 60 on the jib. In the locked position, a spring 62 holds the toggle against a stop 61 on the bracket and the toggle is supported in slightly over-centre position by the engagement of a stop 63, Fig. 4, on the link 58 with the link 57. The toggle is broken to allow the sweep to fall to discharge the load by raising a handle 65 and thus exerting a pull on the connecting cable 64. Springs 8a return the sweep to normal position after the discharge of the load. The load also may be discharged by the movement of a grid 11 along it. This grid is pivoted to a pair of arms 12 which are bolted at 13 to bars 7 slidably mounted in the members 4. Each bar has a series of holes through any one of which the bolt may be inserted to vary the position of the grid with respect to the sweep. The grid is supported also by a pair of struts 14, but when it is not desired to move the grid with respect to the sweep, these struts and also the grid are fixed to the sweep. Stops 15, 17 limit the movement of each bar 7 and a catch 18 is provided to retain each bar in the inner position. This catch is released when it engages an abutment 20a on the frame during the raising of the jib. A toggle 20, 21 controlled by a handle 70 and cable 71 is provided for locking the jib in the raised position. The jib is raised by cables 25 attached to winding drums 24. These cables are arranged so that when the upward movement of the jib is stopped by the abutment 20a, they draw out the bars 7, thereby causing the grid to push the load off the sweep. The winding drums are mounted on a shaft 31 carrying a wheel 32, Fig. 5, which is engageable by a friction wheel 40 mounted on a shaft 37 driven by the engine of the tractor through belt gearing. The shaft is mounted in a boxlike bracket 33 which is pivoted at 34 to an upright 1. A pair of straps 46 pivoted to the bracket support a brake shoe 41 which engages the wheel 32, the pressure thereon being varied by adjusting a screw 45. A cranked member 48, Fig. 7, is journalled at 49 in the bracket 33 and is formed with circular webs 47 which are mounted in eyes 50 in the end of an arm 51 mounted on the shaft 31. One journal 49 is attached to a handle 52 which on being depressed, turns the part 48 in a clockwise direction, thereby simultaneously applying the brake and raising the wheel 40 out of contact with the wheel 32. When the handle is raised, the brake is taken off and the driving member re-engaged. Additional adjustment is provided by making the arm 51 in two parts connected, by an eccentric 51a or the like.