Abstract: A high gain acoustic transducer is formed of a voice coil and a magnetic material housed within a transducer housing. The transducer housing includes two symmetrical dome halves formed of a flexible material. Vibrations of the transducer induce a current in the voice coil as the magnetic material is caused to translate relative to the voice coil. Alternatively, electrical signals applied to the voice coil induce vibrations in the transducer. The voice coil is supported by a first of the two dome halves by way of a first support assembly, and the magnetic material is supported by a second of the two dome halves by way of a second support assembly. The first and second support assemblies are positioned against similarly-dimensioned portions of the first and second dome halves, respectively. Resonating surfaces of the two dome halves are of substantially similar dimensions. The housing forms a watertight enclosure, and the transducer may be utilized in underwater applications.

Abstract: The temperature compensating pressure regulator (TCPR) allows a modified constant output pressure regulator to change its output pressure in response to changes in the ambient temperature. Furthermore, the changes in the ambient temperature are extrapolated to estimate the changes in a mass which is in the same ambient environment. The best mode teaches a beer keg application. A wax filled container expands in relation to the temperature changes in a cold storage room. The thermal expansion coefficient of the wax and impurities therein simulate the temperature changes in a keg of beer in the same cold storage room. Upon responding to a temperature change, the TCPR adjusts the keg pressure to the brewer's predetermined pressures, thereby maintaining the proper CO.sub.2 solution in the beer.Further embodiments include controlling a quarter turn valve with a wax element having a controllable heating coil and controlling the TCPR with a controllable heating coil.

Abstract: The temperature compensating pressure regulator (TCPR) allows a modified constant output pressure regulator to change its output pressure in response to changes in the ambient temperature. Furthermore, the changes in the ambient temperature are extrapolated to estimate the changes in a mass which is in the same ambient environment. The best mode teaches a beer keg application. A wax filled container expands in relation to the temperature changes in a cold storage room. The thermal expansion coefficient of the wax and impurities therein simulate the temperature changes in a keg of beer in the same cold storage room. Upon responding to a temperature change, the TCPR adjusts the keg pressure to the brewer's predetermined pressures, thereby maintaining the proper CO.sub.2 solution in the beer.

Abstract: A speaker system having a magnet and voice coil are mounted within a dome-shaped enclosure in such a way as to be capable of transmitting sonic vibrations and audio waves through a liquid medium or solid structure, the dome-shaped enclosure cooperating with the magnet and voice coil in such a way as to greatly enhance the waves and sonic vibrations generated to the other medium or structure.