Abstract: A fluid-displacer engine which utilizes the thermodynamic Stirling cycle to extract energy from an external thermal gradient is disclosed. A working gas is disposed in each of two adjacent cylinders and is cycled from a hot region to a cold region of the respective cylinders by movement of a hot displacer fluid and a cold displacer fluid. Alternate heating and cooling of the working gas in each chamber causes the displacer fluid to flow from one cylinder to the other which, in turn allows one of the working gasses to expand and compresses the other. The flow of displacer fluids can be optimally controlled by the use of control valves. Energy can be extracted from the flow of the displacer fluids by the use of turbines in the displacer fluid flow paths.

Abstract: A removable brace wedges between a fuel nozzle activating lever and the nozzle handle finger guard. A static electricity sensing circuit has antennas on both protruding sides of the brace. Visual and audible warning signals activate when a user approaches the nozzle with an electrostatic charge in the user's body. Light emitting diodes in upwardly extending protruding side portions are highly visible. A piezo-electric sounding device gives a loud warning. A magnet enables the brace to be attached to a metal part of the vehicle, such as inside the fuel cover door, when not in use.

Abstract: A removable brace wedges between a fuel nozzle activating lever and the nozzle handle finger guard. A static electricity sensing circuit has antennas on both protruding sides of the brace. Visual and audible warning signals activate when a user approaches the nozzle with an electrostatic charge in the user's body. Light emitting diodes in upwardly extending protruding side portions are highly visible. A piezo-electric sounding device gives a loud warning. A magnet enables the brace to be attached to a metal part of the vehicle, such as inside the fuel cover door, when not in use.

Abstract: A fluid-displacer engine which utilizes the thermodynamic Stirling cycle to extract energy from an external thermal gradient is disclosed. A working gas is disposed in each of two adjacent cylinders and is cycled from a hot region to a cold region of the respective cylinders by movement of a hot displacer fluid and a cold displacer fluid. Alternate heating and cooling of the working gas in each chamber causes the displacer fluid to flow from one cylinder to the other which, in turn allows one of the working gasses to expand and compresses the other. The flow of displacer fluids can be optimally controlled by the use of control valves. Energy can be extracted from the flow of the displacer fluids by the use of turbines in the displacer fluid flow paths.