| 摘要 |
<p>The toy vehicles each include a reversible drive motor and a transmission engaged between the motor and two drive wheels, for rotating one or the other of the drive wheels in response to the direction of rotation of the drive motor. This biases the car against one or the other of the side walls of the track to guide the vehicle along its path of travel in one or the other of the lanes. The track includes electricl contact strips which supply power to the drive motor of the vehicles through current collectors. A control system permits the operators to separately and independently control current to the contact strips and also to selectively reverse the polarity of the current so that the operators can vary the speed of their associates vehicles and cause the vehicles to move from one lane to the other.</p> |
