Patent GB-746793-A (GB)
Title: Improvements in, or relating to cable conveyors, particularly devised for loose materials
IPC: B65G17/02
Filed: 1953-12-21
Abstract: 746,793. Endless belt conveyers. BOCK, F. Dec. 21, 1953 [Dec. 19, 1952; April 10, 1953], No. 35516/53. Class 78 (1). In a belt conveyer consisting of a flexible band suspended from a supporting cable or track by suspension means and driven by a traction cable interconnecting the suspension means, the band is caused to assume a troughed formation whilst travelling between terminals with its forward and return runs adjacent to one another, whilst at discharge points and at the terminals the band is caused to assume a position with its plane substantially vertical, in which it depends from the cable or track, to discharge laterally, and in which it travels around a vertical axis at the terminals. In one form, Figs. 1 and 4, the belt 1 is secured by a series of flexible steel strips 7 to a series of suspension members 2 equipped with rollers 6 running on a cable track 3 and connected together by a hauling cable 5, one end of each strip 7 being detachably connected to the suspension member by a fastener 9 engaging over the hauling cable. At the end of the carrying run rollers 10 journalled in release hooks 8 engage a rail 11 causing the fasteners 9 to be first lifted off the hauling cable 5 and then lowered until the belt hangs in vertical position, spilling out the material into a shoot: Before reaching the loading station a further rail 11 (not shown), similarly engages the rollers 10 causing fasteners 9 to be gradually lifted and re-deposited on the hauling cable. In the form shown in Fig. 6, a frame 14 is pivoted to each suspension member 2, and each steel strip 7 is secured at one end to one side of the frame, while the other end is passed through a slot 15 on the other side of the frame, through a slot 15<SP>1</SP> in member 2, and is secured to the same side of the frame as the first end. The frame 14 can thus be tilted by the engagement of a roller 16 with a helical guide track 11 so that the belt hangs in vertical position at the side of the tilted frame. Clips 17 hold the frames in tilted position. Alternatively the belt 1 may be secured directly to the frame 14, the latter being then trough-shaped, the frame being tilted by engagement with a helical series of idler rollers (Fig. 8, not shown). In a further form, Fig. 10, the belt being shown in tilted position is secured at one side to a series of hoops 20, each of which is slidably carried so as to be rotatable in slides on the members 2, and each hoop having adjacent the point of attachment of the belt a roller 16 engaging a helical track 11 at the tilting points. Fig. 11 shows a modification of the Fig. 6 form, in which springy strips 21 attached to the belt are each hinged at one end to one side of each frame 14 and their other ends are each slidable a limited amount in a slot in the other side of each frame. When frame 14 is tilted the strips 21 are relieved of the load and straighten so that the belt is held truly vertical. Instead of the slidable connection the belt and strips 21 may be arranged to rest within a trough-shaped frame 14 when loaded, the belt being raised to a flat condition by straightening of the strips 21 when unloaded. In a still further form, Fig. 21, each member 2 has pivotally mounted on it a C-shaped member 20 to which one side of the belt is pivotally connected in such a way that when rotated from upright position (not shown), in which the belt with its load rests in the lower part of the member 20, to the position shown, the load is tipped and the belt hangs vertically. Locking pegs 23 are provided for holding members 20 in tilted position. Instead of being pivoted eccentrically, as shown, members 20 may be concentrically pivoted, providing less pendulum stability. Flexible cover strips (not shown) may be provided on both sides of members 2 to form a canopy over the belt, there being lifted at the loading station by helical roller tracks.