Control circuit for several related conveyors - has input memory and three interlocking control levers operated simultaneously to produce input signal to change sequence

摘要

The conveyor belt system for bulk material has a number of conveyor sections whose controls are interlocked. The conveyor belt controls operate on three different levels which are input level, memory level and interlocking level. The input level includes two sets of push buttons which have to be operated together to feed an input signal into the appropirae memory unit. When all the inputs of a memory unit are set, an output from the memory reaches the appropriate unit on the interlocking level. Together with timers on the interlocking level, the conveyor control system allows a quick and safe changeover of the conveyor operating sequence.