Patent GB-679985-A (GB)
Title: Improvements relating to agricultural loaders
IPC: A01D87/12
Filed: 1950-03-13
Abstract: 679,985. Endless portable conveyers. CATCHPOLE ENGINEERING CO., Ltd., and BROWN, T. Sept. 20, 1950. [March 13, 1950] No. 6275/50. Class 78 (i). [Also in Group I] A tractor mounted loader, of the type having an endless conveyer elevator mounted in a frame attached in an inclined position at one side of the tractor with the forward end of the conveyer adjacent the ground and the rear end thereof overhanging the rear of the tractor, is characterised in that a section of the conveyer frame at the forward end is pivotally mounted on the main portion of the frame for swinging in a vertical plane to accommodate undulations in the surface of the ground, the lower extremity of the pivoted section riding on the ground, e.g. by means of a skid, and also to enable it to be folded back so as to overlie the adjacent end of the main frame portion, e.g. for stowage or transport. The elevator consists of a pair of endless chains 1 between which are mounted push-plates 2 for conveying material or articles, such as sacks, upwardly along a shallow trough 19, Fig. 3, the lower run being guided by the push-plates resting on tubular guides 27, 28. The endless chains extend the full length of the conveyer frame which consists of fixed section A and section B, pivoted to section A at C. Section B is provided with a shoe D for sliding along the ground, the shoe being adjustable along the slots 54, 55, Fig. 5, in section B, by means of bolts 51, 52, 53 passing through the slots and through holes in brackets 58 on the shoe. The shoe D is kept pressed against the ground by a pair of springs 42 which are so arranged that they also urge section B into a folded position shown in chain lines when it is lifted sufficiently. For manually adjusting the height of the shoe to accommodate unevenness in the ground a lever 38, operated by a, cable 39 from the tractor driver's position, is mounted on a shaft 35, Fig. 6, carried by frame section A adjacent pivot C, shaft 35 also carrying a pair of cams 36 co-operating with a follower 37 on section B. The springs 42 are connected to these cams at 44 to assist the tractor driver in raising section B. Frarne A rests on three laterally projecting bars 69, 69, 77, carried by brackets 71, 71, G respectively, which are secured to the tractor. Each bracket 71 is strengthened by a stay 63, Fig. 10 and pedestal 66. Material lying on the ground is guided by vertical plates 49, 50 mounted at either side of the shoe D into the path of a roller 7, Fig. 5, driven by a sprocket connection 11 from the shaft 8 carrying the lower end sprockets of the conveyer, and is fed by this roller into the path of the push-plates 2 which convey the material along the trough 19 to the upper end of the conveyer where the material is delivered by a roller 103 driven from the conveyer driving shaft 22. The latter is driven from a power take-off shaft 79 on the tractor through a gear box 85 and sprocket connections 82, 88, 92. Sacks and other bodies may also be elevated in a similar way, being delivered on to a table H pivoted at 6 to the conveyer frame, and provided with a folding sack arrester 101. Table H is adjusted angularly by a stay 99 engaging notches 97 on a bar 96 supported in the frame A by a brace 100.