| 摘要 |
729,866. Endless bucket elevators. STAMICARBON N.V. June 30, 1953 [July 2, 1952], No. 18124/53. Class 78 (1). In an elevator comprising a series of buckets mounted on endless chains a bucket is attached to every other chain link and the chain links between the buckets are made shorter than the links to which the buckets are attached, being not more than three quarters of the length of the latter links. As shown, the buckets are carried by chains 9, 10 each consisting of pairs of long and short links 11, 12 and 13, 14 joined by pins 15, 16. Each pin extends through an extension of the adjacent side wall of a bucket and its inner end is notched and engaged by a locking plate 17 welded to the inner surface of the side wall of the bucket. Each bucket consists of a flat inside wall 2, side walls 3, 4, and a curved outer wall 5 joined by welding, the walls 2, 3, 4 being reinforced by angle irons 6, 7 and the edges of the walls 3, 4, 5 forming the mouth of the bucket being provided with a reinforcing rim 8. The chains run over hexagonal driving pulleys 19 provided with alternate long and short faces having lengths corresponding with the links 11, 12 and 13, 14 respectively. Lobes 20 on the short faces engage between the bars of the short links and thrust against the rear ends of the bars of the long links. The links 11 are tapered at their front ends to prevent them bumping against the rim of the pulleys. Guide plates 23 on the long faces of the return pulleys 22 lie just outside the links 12 and prevent the chains running off the pulleys. |
