Abstract: An unmanned autonomous submarine which can float, dive and move in water to perform various tasks. The submarine includes a pressurized cabin which is necessary for the diving and flotation system to work properly. This also helps to increase its sealing power against water leakage into the cabin. The submarine is autonomous, that is automatic and self controlled. It is propelled by water jet propulsion. It can be programmed to dive to preset depths, move along preset trajectories, and return to the base after completing the assigned tasks. A remote control option is provided in order to perform special tasks. The submarine is equipped with several sensors that can measure depth, orientation, attitude, location and speed. It is also equipped with an underwater video camera that can send wireless video pictures from underwater to a monitor above water surface.

Abstract: A motor operated hand tool for tightening and loosening threaded fasteners and comprising a housing having opposed input and output ends, an input spindle slidably, rotatably mounted in the input end of the housing, and an output spindle rotatably mounted in the output end of the housing. A stationary compound gear set is fixedly mounted inside the housing at the output end coaxial with the output spindle. A driving gear is fixedly mounted to an inside end of the output spindle. A rotatable compound gear set is rotatably coupled to an inside end of the input spindle and has an axis of rotation offset from and parallel to an axis of rotation of the input spindle. The second compound gear set is selectively engageable with the stationary compound gear set and the driving gear.

Abstract: A vaporizing carburetor which introduces gasoline vapors into atmospheric air without any heating by directing a stream of air through liquid fuel to cause vaporization and a depression, as a consequence of evaporation, in the temperatures of both the fuel and the resulting mixture, to produce a chemically correct fuel to air ratio and a homogeneous distribution of fuel vapors in the airstream.