GB888059A - Improvements in and relating to conveyors - Google Patents

Abstract

888,059. Endless conveyers. COAL INDUSTRY (PATENTS) Ltd. May 23, 1958 [June 19, 1957], No. 19323/57. Class 78 (1). In a conveyer comprising an endless belt or other endless loadcarrying member (not shown) which is provided with jaws at each side of the belt, each jaw having a number of gaps for the reception of a driving rope or cable, two flights of a single driving rope 12 are crossed over so as to provide upper and lower flights at both sides of the belt by a device comprising sheaves and deflector pulleys, for laterally deflecting the rope flights, the arrangement being such that the distance between the centres of the rope flights is different on entering and leaving the device. In one embodiment, Fig. 2, there are four single sheaves 10, 11, 13, 14, the sheaves 10, 13 and 11, 14 being coaxial, and four deflector pulleys 15- 18. Two double sheaves 24, 25 are also provided, the top edges of the latter sheaves being arranged above those of the sheaves 10, 11, 13 and 14. The top flight of the rope on one side passes over sheave 24, around sheave 11 and pulley 16 to pulley 17, then around sheave 13 to end sheave 20 associated with terminal belt drum 21. The top flight on the other side is similarly transferred to the sheave 19 on the first side via the sheaves 10, 14 and pulleys 15, 18. The sheaves 10, 14 are of larger diameter than sheaves 11, 13 and the pulleys 15, 18 correspondingly lower than pulleys 16, 17. In a second embodiment, Fig. 4, instead of providing separate sheaves 24, 25 these pulleys are incorporated in the sheaves 10, 11, 13 and 14 by forming the latter as double sheaves. The smaller double sheaves 11, 13 have their axes higher than those of the larger double sheaves 10, 14 so that all the sheaves have their top edges at the same level, providing a continuous flat rope assembly for supporting the upper run of the belt.