Slow order control for railway locomotives

Claim 1

IN A SYSTEM FOR GOVERNING THE OPERATION OF A LOCOMOTIVE OVER A LENGTH OF TRACK IN ACCORDANCE WITH TRAFFIC CONDITIONS ON THE TRACK AHEAD OF THE LOCOMOTIVE, SAID TRACK HAVING A STRAIGHT AND LEVEL PORTION AND AN IRREGULAR PORTION, LOCOMOTIVE MOTOR THROTTLE OPERATING MEANS FOR OPERATING THE THROTTLE TO A PLURALITY OF SETTINGS, SPEED REGISTERING MEANS EFFECTIVE TO REGISTER THE ACTUAL SPEED OF THE LOCOMOTIVE, SPEED SELECTION MEANS EFFECTIVE TO SELECT THE LIMIT OF SPEED OF THE LOCOMOTIVE IN ACCORDANCE WITH TRAFFIC CONDITIONS, A FIRST PLURALITY OF CIRCUIT MEANS INCLUDING SAID SPEED REGISTERING MEANS EFFECTIVE TO CONTROL THE THROTTLE OPERATING MEANS TO OPERATE SAID THROTTLE TO A SELECTED SETTING AS GOVERNED BY A RESPECTIVE SPEED SELECTION MEANS AND THE ACTUAL SPEED THE LOCOMOTIVE IS TRAVELLING, A SECOND CIRCUIT MEANS INCLUDING SAID SPEED SELECTION MEANS EFFECTIVE TO SELECT ONE OF SAID FIRST PLURALITY OF CIRCUIT MEANS TO CONTROL THE SPEED OF THE LOCOMOTIVE IN AGREEMENT WITH A PREDETERMINED LIMIT, INFORMATION MEANS AT THE APPROACH TO SAID IRREGULAR PORTION, RECEIVING MEANS ON THE LOCOMOTIVE OPERATED BY SAID INFORMATION MEANS WHEN THE LOCOMOTIVE PASSES SAID APPROACH, AND ELECTRICAL MEANS OPERATIVELY CONNECTED IN SAID FIRST PLURALITY OF CIRCUIT MEANS AND INCLUDING SAID RECEIVING MEANS WHEN OPERATED TO CONTROL SAID THROTTLE OPERATING MEANS TO OPERATE THE THROTTLE OF THE LOCOMOTIVE TO A PREDETERMINED SETTING AS GOVERNED BY SAID INFORMATION MEANS IN ACCORDANCE WITH THE ACTUAL SPEED.