GB309466A - Cement loading, controlling, measuring and counting apparatus for concrete mixers - Google Patents

Abstract

309,466. Robb, J. F. Jan. 9, 1928. Feeding-devices for endless-chain elevators; counting articles and loads, apparatus modified for.-A measuring device for the cement supplied to a concrete mixer comprises a bucket elevator in which each bucket, holding a predetermined quantity of cement, operates a counter the setting of which determines the number of buckets of cement constituting the charge for the batch. In the form shown in Fig. 1, the cement is charged into a shoot 38 by a bucket elevator, the buckets 17, Fig. 5, of which are mounted on springs so that when loaded, pins 19 thereon will operate a lever 20 connected by a link 23 with a counter 25, Fig. 8. The counter comprises a ratchet disc 27 which is rotated step-by-step against a spring 32 by a ratchet 26 operated by the link 23. The disc is provided with a number of holes for the reception of a stop 29 which, after the disc has been moved a number of steps depending on the setting of the stop 29, operates a lever 39 by means of which, through a link 40<a>, Fig. 5, a clutch 44 is thrown out to stop the bucket elevator; simultaneously a bell 48 is rung and a register 25<a> operated. The disc is reset by the release of a detent 31 through a lever 37 and linkage 36, 35 and 33, Fig. 1, from a bracket 7 on the skip 4 when the latter is raised to charge the drum. The elevator is charged from a hopper 14 which may be fed by hand and the door 14a of which is tripped by the pins 19 on the buckets. As shown, the hopper 14 is charged bv a device 11, Fig. 3, reciprocated through a Geneva stop mechanism and having three compartments A, B, C each of which receives by hand the contents of a bag of cement and is discharged by the engagement of a pin 76 on the hopper 14 with trip lever 77 which opens bottom doors 78 through toggles 77<a>, 77<b>. The bags of cement are taken from a platform 8.