Abstract: A speed control circuit is provided for a lift truck which is driven by an electric truck drive motor powered from a power source through a motor controller. The motor controller is responsive to a power control signal generated by summing a speed sensor signal, which is derived by comparing a tachometer signal with a speed selection signal. A fork height sensor provides a fork height signal which is used to limit the maximum level of the speed control signal. A safety circuit monitors operation of the speed control circuit and disconnects the circuit from the motor controller upon occurrence of a malfunction.

Abstract: Apparatus for controlling the position of an antenna rotator from remote locations includes a sender unit which generates desired antenna position information and a control circuit associated with an antenna rotator. The sender includes a dial for selecting the desired antenna position, a control transmitter responsive to the position of the dial for providing an output at a first frequency containing the antenna position information and a holding circuit for continuing the output of the control transmitter until the antenna reaches the desired position. The sender also includes a receiver responsive to a signal at a second frequency from the control circuit for terminating the operation of the control transmitter.