Abstract: Some embodiments of the invention provide an electronic safety device, adapted for use in a helmet suitable for an impact-sport, which operates to warn a first participant that a head inside the helmet is in an unsafe position relative to a body coupled to the head. In some embodiments, the head may belong to the first participant, in which case the first participant is warned of their own unsafe head position. Alternatively and/or additionally, the head may belong to a second participant, in which case the first participant is warned of the unsafe head position of the second participant. In very specific embodiments the electronic safety includes a sensor that senses head position and provides corresponding readings, and a processor that interprets the reading of the sensor in order to determine whether or not to produce a signal that indicates that the head is in an unsafe position.

Abstract: Some embodiments of the invention provide an electronic safety device, adapted for use in a helmet suitable for an impact-sport, which operates to warn a first participant that a head inside the helmet is in an unsafe position relative to a body coupled to the head. In some embodiments, the head may belong to the first participant, in which case the first participant is warned of their own unsafe head position. Alternatively and/or additionally, the head may belong to a second participant, in which case the first participant is warned of the unsafe head position of the second participant. In very specific embodiments the electronic safety includes a sensor that senses head position and provides corresponding readings, and a processor that interprets the reading of the sensor in order to determine whether or not to produce a signal that indicates that the head is in an unsafe position.

Abstract: An optical level detection probe is disclosed having first and second spaced apart optic guides, each guide having a 45.degree. angle reflecting face or surface opposing one another such that light traveling along the first optic guide will reflect off of its 45.degree. angle face, reflect off of the 45.degree. angle face of the second optic guide, and travel along the second optic guide for detection by a sensor as long as the material is below the reflecting surfaces. When the material reaches the reflecting surfaces, the light will be blocked.