Abstract: A high voltage proximity warning system utilizing wireless sensors for preventing heavy equipment from contacting high voltage lines is provided. The warning system is adapted for use with mobile heavy equipment that can be used around overhead power transmission lines. The alarm system consists of a number of wireless radio linked proximity antennas mounted on heavy equipment in locations that could possibly come into contact with high voltage lines. These wireless antennas detect the electric field in the proximity of the high voltage lines and transmits signals to a control panel located in the proximity of the operator of the equipment. The resulting signal level is displayed on the control panel along with an alarm setpoint. If the signal level rises above the alarm setpoint, the control panel provides a visual alarm indication, an audio alarm annunciation, and control signals that can directly inhibit specific functions of the heavy equipment.

Abstract: The invention provides a device and method for producing substantially kinematic steering of a boat whose yaw rate and direction is approximately proportional to the rate and direction that a steering device such as a steering wheel is being operated. The invention provides a helmsman a precise method of steering that is relatively independent of such considerations such as the size and weight of the boat, conflicting currents and winds, windage, the size of the rudder and the overall inherent controlling characteristics of the boat. When the steering device is not being operated, the boat continues on a straight course; however, when the steering device such as the steering wheel is turned in one direction or the other, the steering rate of the boat is relatively dependent upon the rate that the steering wheel is being turned.