Abstract: Systems and methods which allow a spotter external to a vehicle to provide signals to a driver of the vehicle in order to facilitate safe backup operations of the vehicle are disclosed. A wireless transmitter, in wireless communication with a receiver positioned within the vehicle, is operated by the spotter. An indicator, also in communication with the receiver, is configured to provide a plurality of audible and/or visible signals perceivable by the driver in response to a wireless signal received by the receiver from the transmitter. The audible and/or visible signals may comprise selected patterned tones and lights which inform the driver whether they should proceed to backup the vehicle or stop the vehicle.

Abstract: Systems and methods which allow a spotter external to a vehicle to provide signals to a driver of the vehicle in order to facilitate safe backup operations of the vehicle are disclosed. A wireless transmitter, in wireless communication with a receiver positioned within the vehicle, is operated by the spotter. An indicator, also in communication with the receiver, is configured to provide a plurality of audible and/or visible signals perceivable by the driver in response to a wireless signal received by the receiver from the transmitter. The audible and/or visible signals may comprise selected patterned tones and lights which inform the driver whether they should proceed to backup the vehicle or stop the vehicle.

Abstract: Systems and methods which allow a spotter external to a vehicle to provide signals to a driver of the vehicle in order to facilitate safe backup operations of the vehicle are disclosed. A wireless transmitter, in wireless communication with a receiver positioned within the vehicle, is operated by the spotter. An indicator, also in communication with the receiver, is configured to provide a plurality of audible and/or visible signals perceivable by the driver in response to a wireless signal received by the receiver from the transmitter. The audible and/or visible signals may comprise selected patterned tones and lights which inform the driver whether they should proceed to backup the vehicle or stop the vehicle.

Abstract: Systems and methods which allow a spotter external to a vehicle to provide signals to a driver of the vehicle in order to facilitate safe backup operations of the vehicle are disclosed. A wireless transmitter, in wireless communication with a receiver positioned within the vehicle, is operated by the spotter. An indicator, also in communication with the receiver, is configured to provide a plurality of audible and/or visible signals perceivable by the driver in response to a wireless signal received by the receiver from the transmitter. The audible and/or visible signals may comprise selected patterned tones and lights which inform the driver whether they should proceed to backup the vehicle or stop the vehicle.

Abstract: A back-up safety apparatus and method that enables the driver of a large vehicle with inherent rear blind spots to receive signals, to proceed or stop, based on changing safe or unsafe conditions. A spotter who monitors the vehicle's progress from a safe and remote vantage point in the rear, uses a hand held wireless transmitter to signal the driver. The transmitter also provides a deadman style safety switch for the benefit of the spotter that will automatically signal the driver to stop if the spotter becomes disabled, falls or drops the transmitter.

Abstract: A back-up safety apparatus and method that enables the driver of a large vehicle with inherent rear blind spots to receive signals, to proceed or stop, based on changing safe or unsafe conditions. A spotter who monitors the vehicle's progress from a safe and remote vantage point in the rear, uses a hand held wireless transmitter to signal the driver. The transmitter also provides a deadman style safety switch for the benefit of the spotter that will automatically signal the driver to stop if the spotter becomes disabled, falls or drops the transmitter.

Abstract: Systems and methods which allow a spotter external to a vehicle to provide signals to a driver of the vehicle in order to facilitate safe backup operations of the vehicle are disclosed. A wireless transmitter, in wireless communication with a receiver positioned within the vehicle, is operated by the spotter. An indicator, also in communication with the receiver, is configured to provide a plurality of audible and/or visible signals perceivable by the driver in response to a wireless signal received by the receiver from the transmitter. The audible and/or visible signals may comprise selected patterned tones and lights which inform the driver whether they should proceed to backup the vehicle or stop the vehicle.

Abstract: A back-up safety apparatus and method that enables the driver of a large vehicle with inherent rear blind spots to receive signals, to proceed or stop, based on changing safe or unsafe conditions. A spotter who monitors the vehicle's progress from a safe and remote vantage point in the rear, uses a hand held wireless transmitter to signal the driver. The transmitter also provides a deadman style safety switch for the benefit of the spotter that will automatically signal the driver to stop if the spotter becomes disabled, falls or drops the transmitter.

Abstract: Fluid operated time modulated position control mechanisms are operated with a sub-critical carrier frequency. The carrier frequency is selected to be within a band lying between the minimum critical or natural frequency of an actuator system including the control mechanism and the maximum control signal frequency as determined by the system dynamics. The carrier signal is also selected to provide a dither amplitude sufficient to overcome the coulomb friction of the control mechanism and load.