Remote controls for railway safety systems - with priority for transmitted signals informing new changes of condition

摘要

Information is transmitted by the time-division multiplex system from individual stations to a central control in an interrogation cycle, using counters whose capacity equals the number of steps in the cycle. the stations contain several groups of information storage devices having different priorities. Groups having the same priority are allocated consecutive stages in the counters which can be set in partial cycles. Synchronous operation of all the counters is effected by a clock generator which generates a series of pulses for at least the first partial cycle in each interrogation cycle. Pref. the number of clock pulses for one or more associated partial cycles can be programmed.