Abstract: A rotating beacon employs an array of LEDs mounted on a rotor assembly in a pattern for unidirectional emission wherein the LEDs are excited through noncontact inductive coupling between a load coupling on the rotor assembly and a source coupling on the stator or mount element. In a particular embodiment, a primary sender flat coil of an air gap transformer is disposed concentrically forming a disc and mounted juxtaposed to a secondary receiver flat coil so that power can be conveyed across the air gap while the rotor is in motion. The transferred power excites substantially all of the LED array in a fixed pattern on the rotating mount. In a second embodiment, the air gap transformer has a primary sender coil is mounted coaxially with a secondary receiver coil (which is typically but not necessarily inside the primary coil), so the secondary, with the array can freely rotate and draw power from the source.

Abstract: The present invention is a system for use, for example, in motorized vehicles to provide a warning signal directed to the attention of the driver of the equipped vehicle and also to the operator of a target vehicle, as well as possibly other drivers in the vicinity of the system-equipped vehicle of impending danger. The system senses the presence of obstacles that can be identified by scanning and subsequently tracked. Obstacles may be fixed objects or other vehicles either also moving or still. The system detects and determines the distance separating the object from the sensor location, its ground velocity and rate of closure. The system's signaling sound and light emitters are able to be positioned and adjustable to face a target receiver and are able to signal with varying sound and light patterns and output amplitudes.