Abstract: Goggles for use in water that are configured to guide a person along predetermined courses. The goggles can have a pair of indicators that can be in communication with a microprocessor. The microprocessor can actuate the indicators selectively to guide a person wearing the goggles along a predetermined course.

Abstract: An implement includes a frame, a tower, a manifold, and a retractable mount. The manifold is attached to the tower. The retractable mount attaches the tower and manifold to the frame and is configured to allow the tower and manifold to move between an extended position and a retracted position relative to the frame. A distance between the manifold and the frame is greater in the extended position than in the retracted position.

Abstract: Goggles for use in water that are configured to guide a person along predetermined courses. The goggles can have a pair of indicators that can be in communication with a microprocessor. The microprocessor can actuate the indicators selectively to guide a person wearing the goggles along a predetermined course.

Abstract: Goggles for use in water comprising a frame, a first lens operatively secured in a frame, a second lens operatively secured in the frame, a first indicator adjacent the first lens, a second indicator adjacent the second lens, and a housing connected with both ends of the frame wherein the housing is in communication with the indicators.

Abstract: In the structure for providing protection for the human body from ballistic projectiles which includes one or more ballistic resistant panels overlying at least a portion of the body, wherein the improvement comprising one or more electronic devices integrated into at least one of the ballistic resistant panels.

Abstract: The trigger mechanism allows the firearm to operate in a closed-bolt mode during semi-automatic fire and in an open-bolt mode during automatic fire. The mode change occurs only after the first round is discharged after the selector has been moved instead of when the selector switch is moved, thus avoiding undesirable mechanism noise or motion at the time of selecting the firing mode.

Abstract: The invention provides an under-reamer tool and method for creating a large diameter volume within a well bore. The under-reamer tool includes a mandrel for connection to a drill pipe and for supporting a torque arm assembly and hole initiator assembly. The hole initiator assembly, upon activation, creates a nominally larger diameter volume that triggers activation of the torque arm assembly thereby allowing the torque arm assembly to extend to cut away a cutting face thereby creating a significantly larger diameter volume within the wellbore as the under-reamer is rotated within the wellbore. Reverse circulation of a circulation medium in combination with the geometry of the cutting face provides effective removal of the cuttings from the cutting face.

Abstract: Aromatic prostaglandin derivatives are prepared. These compounds have valuable antiprostaglandin activity specifically inhibiting prostaglandin synthesis and antagonizing diarrhea induced by prostaglandin E.sub.2 (PGE.sub.2).

Abstract: Heterocyclic homoprostanoidal derivatives are prepared. These compounds have valuable antiprostaglandin activity specifically inhibiting prostaglandin synthesis and antagonizing diarrhea induced by prostaglandin E.sub.2 (PGE.sub.2).