GB905056A - Improvements in or relating to automatically controlled dispensing devices - Google Patents

Abstract

905,056. Automatic weight-control systems. HAECHLER, W. Oct. 18, 1960, No. 35607/60. Class 38 (4). [Also in Group XVIII] In an automatic system for weighing the individual constituents of a mixture, the material to be weighed is dispensed from a supply device to a weighing device including a pivoted conveyer driven at constant speed and a reading of the quantity of material on the conveyer is fed to a remotely positioned control device which controls the dispensing of the material. As shown, the rate of flow of a fluent material leaving a hopper through a pipe 3 is controlled by a pivoted shutter 12 positioned by a motor 6. The discharged material is received on a conveyer 13, moving at constant speed, which is rotatable about a pivot 50 against the action of a spring 51. Movement of a rod 22, representative of the weight of material on the conveyer, through a lever 14 and rack- and-pinion 26, 27 rotates an indicating pointer 15 and a rotor 29 of a transmitter 31 having a stator 30 connected to a stator 32 of a receiver 33. A rotor 34 of the receiver 33 drives a shaft 35 to which is secured an indicating pointer 19 and cams 41, 42. Micro-switches 43, 44 are secured to a gear-wheel 38 coupled to a setting-pointer 36, the position of which is adjusted by a shaft 39 carrying a gear-wheel 40 meshing with the gear-wheel 38. The microswitches are each connected to an energizing coil of a relay 49 to determine the direction of rotation of the motor 6 and are actuated by cams 41, 42 so as to maintain the rate of delivery of material from the hopper between predetermined limits. The limits are set by the angular displacement of the recesses 47, 48 of the cams. A plurality of hoppers and associated weighing conveyers 13 may deliver to a main conveyer and a template device, Fig. 4 (not shown), may simultaneously position all the setting pointers.