Abstract: An automatic charge hearth access door assembly for a melting furnace includes an access door movable between a closed position for covering a furnace opening located on a face of the furnace and an opened position for providing access to the furnace opening. A latch mechanism is configured to automatically secure the access door to the face of the furnace in the closed position. An open-and-close drive assembly includes a motor and arm operably connected to the motor. The open-and-close drive assembly is configured to automatically move the access door relative to the face of the furnace between the closed position and opened position and simultaneously move the access door relative to the arm.

Abstract: An automatic charge hearth access door assembly for a melting furnace includes an access door movable between a closed position for covering a furnace opening located on a face of the furnace and an opened position for providing access to the furnace opening. A latch mechanism is configured to automatically secure the access door to the face of the furnace in the closed position. An open-and-close drive assembly includes a motor and arm operably connected to the motor. The open-and-close drive assembly is configured to automatically move the access door relative to the face of the furnace between the closed position and opened position and simultaneously move the access door relative to the arm.

Abstract: A system and method for partially or completely inverting (rotating) a die and subsequently returning the die to its normal operating position. Systems of the invention include a roll-over unit that engages a roll frame or similar structure to which a die of interest is temporarily secured. The roll-over unit includes a drive motor that is used to rotate the roll frame and the die that is releasably coupled thereto. A deceleration assembly is provided to bring rotation of the die to a slow and controlled stop in one or both rotational directions. When the drive motor is a hydraulic motor, the deceleration assembly may include deceleration valves that are actuated by a rack gear that is caused to move linearly during rotation of the drive motor.

Abstract: A system and method for partially or completely inverting (rotating) a die and subsequently returning the die to its normal operating position. Systems of the invention include a roll-over unit that engages a roll frame or similar structure to which a die of interest is temporarily secured. The roll-over unit includes a drive motor that is used to rotate the roll frame and the die that is releasably coupled thereto. A deceleration assembly is provided to bring rotation of the die to a slow and controlled stop in one or both rotational directions. When the drive motor is a hydraulic motor, the deceleration assembly may include deceleration valves that are actuated by a rack gear that is caused to move linearly during rotation of the drive motor.

Abstract: An electrical system and method for a turbine/alternator comprising a gas driven turbine and a permanent magnet alternator rotating on a common shaft includes an inverter circuit connectable either to an output circuit or the stator winding of the alternator. A control circuit during a start-up mode switches the inverter circuit to the stator winding of the alternator and during a power out mode switches the inverter circuit to the output circuit and power line. During the power output mode the power line is monitored and the output voltage, frequency and/or phase is matched or synchronized to the power line.