Brake and propulsion control system for automated trains

Claim 1

AUTOMATIC BRAKE AND PROPULSION CONTROL APPARATUS FOR UNMANNED TRAINS, SAID APPARATUS COMPRISING IN COMBINATION: (A) SIGNAL PICK-UP MEANS SUBJECT TO INFLUENCES PROPAGATED FROM THE TRACKWAY AND VARIOUSLY RESPONSIVE DEPENDING UPON THE TRACK ZONE ENTERED BY THE TRAIN, (B) A PLURALITY OF BRAKE CONTROL MEANS SELECTIVELY OPERATIVE TO EFFECT DIFFERENT DEGREES OF A BRAKE APPLICATION, (C) PROPULSION CONTROL MEANS, (D) PULSATING VOLTAGE MEANS PROVIDING A VOLTAGE PULSATING AT A FREQUENCY PROPORTIONAL TO THE SPEED OF THE TRAIN, (E) PULSATION COUNTING MEANS OPERATIVE TO COUNT AND TO REGISTER THE PULSATION FREQUENCY OF THE VOLTAGE SUPPLIED BY SAID PULSATING VOLTAGE MEANS, (F) TIMING MEANS FOR ESTABLISHING THE TIME INTERVAL DURING WHICH THE PULSATION COUNTING MEANS COUNTS AND REGISTERS THE PULSATION FREQUENCY OF THE VOLTAGE SUPPLIED BY THE PULSATING VOLTAGE MEANS, (G) AND ZONING MEANS SELECTIVELY RESPONSIVE TO CONTROL BY SAID SIGNAL PICK-UP MEANS ACCORDING TO THE TRACK ZONE ENTERED BY THE TRAIN FOR SELECTIVELY CAUSING THE TIMING MEANS TO VARY THE LENGTH OF TIME SAID PULSATION COUNTING MEANS COUNTS THE PULSATIONS FREQUENCY OF THE VOLTAGE SUPPLIED BY THE PULSATING VOLTAGE MEANS, (H) SAID PULSATION COUNTING MEANS AND SAID ZONING MEANS BEING OPERATIVE COOPERATIVELY TO SELECTIVELY CONTROL SAID PLURALITY OF BRAKE CONTROL MEANS AND SAID PROPULSION CONTROL MEANS TO CONTROL THE SPEED OF THE TRAIN ACCORDINGTO THE TRACK ZONE ENTERED BY THE TRAIN.