Abstract: The present invention is a grappling hook for use in mooring boats. It has an elongated shank defining an axis and having first and second ends thereon. The shank has a mooring line fastened to the first end and a hook-shaped grasping end at the second end extending outward from the axis. The hook has a balance point on the shank where the weight of the first end equals the weight of the second end. To moor the boat, the hook is thrown therefrom over an obstruction by the mooring line and drawn toward the boat, and when the balance point on the shank reaches the obstruction, the force of gravity lifts the hook end from the obstruction and rotates it downward about the shank to engage the obstruction, making fast the boat.

Abstract: A reversible drive mechanism for socket wrenches, having a detented selector cap thereon. The socket driving post of the wrench is fixedly attached to a triangular shaft rotatably contained within an internal cylindrical bearing surface, which in contained within the head of the wrench handle. Each face of the triangular shaft is a convex arc-shaped surface, and the cylindrical surface and the convex surfaces create between them three lune-shaped spaces. Each of the convex faces on the triangular shaft has tiltably mounted thereon a U-shaped fixture, which loosely contains within its arms a cylindrical roller. As the selector cap is rotated back and forth between selector positions, each U-shaped fixture tips back and forth on its respective convex face, and shifts the contained roller from one extreme to the other of its respective lune-shaped space.

Abstract: A reversible drive mechanism for socket wrenches, having a detented selector cap thereon. The socket driving post of the wrench is fixedly attached to a triangular shaft rotatably contained within an internal cylindrical bearing surface, creating three arc-shaped spaces. The cylindrical surface is the inner surface of the head of the wrench handle. Each of the surfaces on the triangular shaft has tiltably mounted thereon a U-shaped fixture, which loosely contains within its arms a cylindrical roller. As the selector cap is rotated back and forth between selector positions, each U-shaped fixture tips back and forth on its respective triangular surface, and shifts the contained roller from one side to the other of its respective arc-shaped space.