Abstract: A method and apparatus for determining local solar time for virtually any location on any planet having a radiating sun, wherein the method requires minimal a prior knowledge of the planet's major characteristics and the apparatus is organized so as to permit completely automatic determination of the key parameters from which the time calculation is derived. Advantageously, the time determination is accomplished using a formulation of the time equation which depends on two key solid angles initially obtainable any time the planet's sun is reasonably high above the horizon. Additionally, methods are outlined which permit the apparatus to provide basic navigational data, such as latitude and longitude locations (for other than extreme polar positions) of the timepiece.
Abstract: A phonostethoscope conversion unit for use with conventional stethoscopes in order to amplify and clarify critical body sounds by interposing a pair of detachable electronic conversion units at the earpiece locations to optionally provide improved operational characteristics. The electronic units are located at the terminal end of the vibrating air column so as to provide an amplified version of the sounds of interest in a manner which the user has been attuned by experience to expect from his instrument, and further to minimize the impact of the units during stethoscope usage when the electronic assist capability is not in use.