Patent ID: 7142957

Claim:
In an automatic vehicle operation system for controlling the speed of vehicles traveling in a single direction over a guideway said system consisting of: a. a plurality of successive electrical power segments spaced one from another along at least a substantial portion of the length of said guideway; b. a vehicle for traveling along said guideway; c. a driving induction motor disposed in said vehicle; d. means for coupling said power segments to said motor; and e. a first plurality of electrical power source means coupled to said power segments for producing a series of traveling power frequency waves along said guideway, each of said power segments being at a frequency different from that of the other of said segments within a wave, said induction motor receiving with respect to a predetermine wave a preceding or succeeding segment of a frequency as to decrease the torque of said induction motor in response to an increase in vehicle speed and to increase the torque of said induction motor in response to a decrease in vehicle speed from the effective speed of said predetermined wave as it travels along said power rails; the improvement which comprises the establishment of at least one zone in said roadway utilizing those power segments within said zone for stopping and starting said vehicle comprising in combination: i. a selected series of said power segments within said zone arranged to receive said traveling waves to create a starting and traveling condition; ii. a second plurality of electrical power source means coupled to said selected series of power segments for providing a series of decreasing power frequencies at each of said selected series of power segments with respect to the direction of travel of said vehicle to create a stopping condition; and iii. switching means interposed between said first plurality of electrical power source means, said second plurality of electrical power source means and said selected series of power segments whereby either said first or second plurality of electrical power source means will be connected to said selected series of power segments at any particular time.