System for controlling the direction and speed of a steerable locomotive
Patent 4264851 Issued on April 28, 1981. Estimated Expiration Date: 
August 21, 1999. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
August 21, 1999. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3720281 Electronic position and velocity control system Total power fluid system vehicle with steering control Safety interlock circuit for an error-signal-controlled servo system Patent #: 4191913 InventorsAssigneeApplicationNo. 06/068388 filed on 08/21/1979US Classes:318/587, Land vehicles180/6.28, Electrical318/663Potentiometer systems including autotransformers and Wheatstone bridgesExaminersPrimary: Dobeck, B.Attorney, Agent or FirmInternational ClassesB60K 17/30 (20060101)B60K 17/00 (20060101) B62D 11/18 (20060101) B62D 11/06 (20060101) B62D 11/02 (20060101) Foreign Application Priority Data1978-08-25 FRAbstractA direction and speed control system for a steerable locomotive having independent speed controls for two driving rollers, in which, where CD and CG are speed control signals for the two rollers, is a steering angle of a steerable support, which may be a mere skid or a driving roller and Cmax is a maximum speed control value, there are three operational networks which generate signals F1, F2 and F3 given by C(1-K1 tan ), C(1+K1 tan ) and Cmax (1-K1 | tan |)/(1+K1 | tan |), comparators which receive Cmax and F1 and Cmax and F2 respectively and output terminals fed in parallel, through gating circuits controlled by the comparators, by the first and third networks and by the second and third networks respectively. | |
