GB222294A - Improvements in automatic weighing apparatus for liquids - Google Patents

Abstract

222,294. Simpson, J. R. H. Aug. 30, 1923. Automatic - feed weighers.-An automatic weighing - apparatus for liquids and particularly for sugar juices comprises a pair of balanced receptacles into which a surplus quantity of liquid is passed alternately, the supply: of liquid being diverted automatically from one receptacle to the other when the contents of the first receptacle is discharged automatically, the surplus liquid being discharged automatically and serving to actuate the liquid supply means so as to divert the supply of liquid from one receptacle to the other. Two receptacles 6 mounted on counterbalanced weight-beams 5 are arranged side by side and are supplied alternately with the liquid by means of a pipe 11, pivoted tube 10 and a divided hopper 8. Assuming the right-hand receptacle, Fig. 1, to be filling, the increasing charge causes the receptacle to fall, but as the feed of liquid continues an overweight is received. A rod 58, Fig. 4, descending with the receptacle. is arrested by a stop on the frame and opens a valve 57, allowing the surplus liquid to run out into a bucket 18 suspended from one arm of a lever 14, Fig. 1, the other arm supporting a similar bucket 17 used in connection with the left-hand receptacle. The liquid in the bucket 18 rocks the lever 14 and thus turns the feed tube 10 so as to direct the feed into the left-hand receptacle. A hole 20<a> in the overflow of the bucket 18 allows the contents to run out for return to the source of supply. During the downward movement of the right-hand receptacle a roller thereon pushes back a sliding catch on the lefthand receptacle and thus allows the discharge valve of the left-hand receptacle to fall into the closed position. When the weigh-beam rises, due to the loss of the surplus liquid, the valve 57 closes and a block on the weigh-beam presses upon the lower end of a lever 44, Fig. 4, pivoted on a weighted lever 43, and throws the weighted lever into the horizontal position shown. The weighted lever, acting through a link 42. sleeve 34 and spring 37 raises a rod 24 and opens the discharge valve 23 of the weighing-receptacle. During the further upward movement of the weighing-receptacle (retarded by a dash-pot), a roller 63 restores the weighted lever 43 to its former vertical position, where it is retained by a catch 52. A similar cycle of operations takes place in connection with the left-hand receptacle. In a modified arrangement the discharge valve 23 is opened by a solenoid the circuit of which is closed by the upward movement of the weighing receptacle.