Control device for the step-wise, pilot controlled level regulation of communication systems

Claim 1

IN A DEVICE FOR THE STEPWISE, PILOT-CONTROLLED LEVEL REGULATION OF COMMUNICATION TRANSMISSION SYSTEMS, ESPECIALLY FOR CARRIER FREQUENCY MULTICHANNEL LONG DISTANCE COMMUNICATION SYSTEMS WITH MANY REGULATORS CONNECTED IN SERIES, IN WHICH THE RECEIVED, AMPLIFIED, AND RECTIFIED PILOT VOLTAGE IS EVALUATED BY A VOLTAGE DISCRIMINATOR WHICH RESPONDS TO THE OCCURRENCE OF AN UNDERLEVEL OR AN OVERLEVEL AND DETERMINES THE STEPPING DIRECTION OF A SETTING DEVICE WHICH IS STEPPED BY MEANS OF STEPPING PULSES FROM A PULSE GENERATOR, THE IMPROVEMENT COMPRISING MEANS FOR COUPLING THE PULSE GENERATOR WITH THE DISCRIMINATOR IN SUCH A MANNER THAT THE PULSE GENERATOR IS RELEASED ONLY WHEN THE DISCRIMINATOR IS RESPONDING AND THAT AFTER A PREDETERMINED SMALL DELAY PERIOD AFTER SETTING THE STEPPING DIRECTION OF THE SETTING DEVICE, A FIRST TIMING PULSE OCCURS AND CHANGES THE SETTING DEVICE IMMEDIATELY BY ONE STEP IN THE DESIRED DIRECTION, WHILE THE SUBSEQUENT STEPPING PULSES FOLLOW IN ACCORDANCE WITH THE SYNCHRONIZING FREQUENCY, UNTIL THE DISCRIMINATOR HAS AGAIN ATTAINED ITS REST CONDITION.