Abstract: A passive feedback mechanism by which sound produced by a musical instrument is enhanced by utilizing the reverberations from the sound to dynamically and passively alter the magnetic field in the vicinity of an electronic pickup is disclosed. This is accomplished by utilizing a component or material adhered to the instrument with the property to alter the magnetic field as the material vibrates in response to sound reverberation, one embodiment being a ferromagnetic surface coating. An electromagnetic pickup, sensitive to these variations in the magnetic field, is installed on or within the instrument. The changes in the magnetic field, in response to the music, are captured by the pickup and transformed into an electric signal with thus produce a unique and enhanced sound.

Abstract: A passive feedback mechanism by which sound produced by a musical instrument is enhanced by utilizing the reverberations from the sound to dynamically and passively alter the magnetic field in the vicinity of an electronic pickup is disclosed. This is accomplished by utilizing a component or material adhered to the instrument with the property to alter the magnetic field as the material vibrates in response to sound reverberation, one embodiment being a ferromagnetic surface coating. An electromagnetic pickup, sensitive to these variations in the magnetic field, is installed on or within the instrument. The changes in the magnetic field, in response to the music, are captured by the pickup and transformed into an electric signal with thus produce a unique and enhanced sound.

Abstract: The present invention provides a device for removing well casing from plugged and abandoned oil wells. The invention includes a unitary platform structure sufficiently small that the structure may be transported by boat to offshore well platforms and be lifted onto the well platform as a single unit. The platform also has a center station with an opening allowing the casing to pass therethrough. The device further includes at least one lifting means, which lifts the well casing through the center station.The present invention will serve many of the purposes of much larger drilling rigs or work over rigs typically employed on oil and gas well platforms. The present invention will be much quicker to transport and requires considerably less set-up time than dig rigs or work over rigs.