Abstract: An invention is disclosed for a distributed shell for use in a distributed computer environment. The distributed shell includes a shell server, which is located on a server computer system. The shell server processes commands for distribution to particular client computer systems of the distributed computer system. In addition, the distributed shell includes a plurality of shell clients. Each shell client is executed on a separate client computer system and is in communication with the shell server. In operation, the shell server selects a particular shell client to perform a task or tasks in response to receiving a command. The tasks are then sent to the selected shell client and the shell client executes the task.

Abstract: An invention is provided for testing in a Java based environment. The method includes launching a test harness in a first JVM, and starting a virtual machine (VM) agent in a second JVM. The VM agent is placed in communication with the test harness. The VM agent then executes a test application such that both the test application and the VM agent execute in the second JVM. In this manner, the VM agent is restarted using the test harness if the second JVM fails.

Abstract: An invention is disclosed for a distributed shell for use in a distributed computer environment. The distributed shell includes a shell server, which is located on a server computer system. The shell server processes commands for distribution to particular client computer systems of the distributed computer system. In addition, the distributed shell includes a plurality of shell clients. Each shell client is executed on a separate client computer system and is in communication with the shell server. In operation, the shell server selects a particular shell client to perform a task or tasks in response to receiving a command. The tasks are then sent to the selected shell client and the shell client executes the task.

Abstract: An invention is provided for testing in a Java based environment. The method includes launching a test harness in a first JVM, and starting a virtual machine (VM) agent in a second JVM. The VM agent is placed in communication with the test harness. The VM agent then executes a test application such that both the test application and the VM agent execute in the second JVM. In this manner, the VM agent is restarted using the test harness if the second JVM fails.

Abstract: A microprocessor controlled system and method for automaticaly determining the rate of leakage from a fluid storage tank. The method includes four phases. In Phase #1 the operator manually enters into the system the phase setting, the tank type, the tank material, the tank diameter, the tank volume, and the type of product in the tank. In Phase #2 the operator manually enters into the system the API gravity and the API temperature of the product it the tank. In Phase #3 the microcontroller calculates the thermal coefficient of expansion of the product, and maintains the level of product in a stand tube and computes the product being put in and taken out of the stand tube.

Abstract: A fluid level maintenance sensor or use in a tank test system and which includes an upper sensor coil and a lower sensor coil mounted on a level sensing tube. A float carrying a ferromagnetic ring is operatively mounted in the level sensing tube which causes a fluid transfer signal to be generated when the float and ring are moved upwardly or downwardly to transfer fluid out or into the level sensing tube to maintain a selected fluid level in the tube.

Abstract: A microprocessor based fluid tank test management system and method, for measuring the tightness of fluid tanks for leakage. The system includes, an automatic temperature sensing apparatus to measure any temperature change in the fluid during a test period, apparatus for continuously circulating the fluid in the tank, apparatus for stabilizing the geometry of the tank, apparatus for automatically maintaining a constant fluid head in communication with the fluid in the tank and for measuring the fluid added to or removed from the fluid head to keep it constant during the test period, apparatus to determine the coefficient of expansion of the fluid in the tank, and apparatus for utilizing the values of the temperature change, the fluid measurement, and coefficient of expansion, to automatically calculate any fluid leak from the tank during the test period.

Abstract: A thermal probe for use in a tightness testing apparatus for an underground storage tank provided with a fill pipe extending from ground level down to the tank, and including a mechanical compression, ring-shaped seal which sealingly engages the outer periphery of the access or fill pipe of an underground storage tank and expands to form a leak tight connection therewith.

Abstract: A control circuit for automatically controlling and transferring various power sources for a recreational vehicle or the like. More particularly, the system responds to various load demands, contingencies and conditions to control and transfer the power supplied to the recreational vehicle between a land line, a motor generator, and an inverter.