Abstract: A workpiece indexing and clamping system for machining the workpiece. Spherical or narrow cylindrical heads of index pins extend from holes in a base plate into workpiece holes to align and index the workpiece. The pin portions in the base plate holes can be expanded to lock them to the base plate. Each pin has relief flats parallel to the pin axis. Clamps engage workpiece edges with thread-like angled grooves on a cam surface to force workpiece edges against the base plate during machining of the workpiece. A central clamp has a pin extending from the base plate into a workpiece hole. Angled grooves in a cam surface are brought into contact with the hole sides to force the workpiece toward the base plate and hold the central area in place during machining. In another version, a combined index and clamp pin has a head that fits within a workpiece hole and an extension that fits within a base plate hole.

Abstract: A workpiece indexing and clamping system for machining the workpiece. Spherical or narrow cylindrical heads of index pins extend from holes in a base plate into workpiece holes to align and index the workpiece. The pin portions in the base plate holes can be expanded to lock them to the base plate. Each pin has relief flats parallel to the pin axis. Clamps engage workpiece edges with thread-like angled grooves on a cam surface to force workpiece edges against the base plate during machining of the workpiece. A central clamp has a pin extending from the base plate into a workpiece hole. Angled grooves in a cam surface are brought into contact with the hole sides to force the workpiece toward the base plate and hold the central area in place during machining.

Abstract: A workpiece indexing and clamping system for machining the workpiece. Spherical or narrow cylindrical heads of index pins extend from holes in a base plate into workpiece holes to align and index the workpiece. The pin portions in the base plate holes can be expanded to lock them to the base plate. Each pin has relief flats parallel to the pin axis. Clamps engage workpiece edges with thread-like angled grooves on a cam surface to force workpiece edges against the base plate during machining of the workpiece. A central clamp has a pin extending from the base plate into a workpiece hole. Angled grooves in a cam surface are brought into contact with the hole sides to force the workpiece toward the base plate and hold the central area in place during machining.

Abstract: A hoist assembly having a swiveling head with a pivoting shackle. A lift swivel is captured by a housing and is rotatable relative to the housing. A shackle assembly including a hoist ring is fastened to the lift swivel. A lift bolt is threaded into the housing opposite the shackle assembly. The lift bolt includes an axially extending shaft for threading into a corresponding hole in a structure to be lifted. The end of the shaft in the hole is expandable to lock the shaft in the structure hole. A retainer such as a snap ring, or a jam ring and setscrews may be provided to securely lock the lift bolt to the housing. The lift bolt is threaded into the housing by a tool extending through the lift swivel or from the opposite end.

Abstract: A workpiece indexing and clamping system for machining the workpiece. Spherical or narrow cylindrical heads of index pins extend from holes in a base plate into workpiece holes to align and index the workpiece. The pin portions in the base plate holes can be expanded to lock them to the base plate. Each pin has relief flats parallel to the pin axis. Clamps engage workpiece edges with thread-like angled grooves on a cam surface to force workpiece edges against the base plate during machining of the workpiece. A central clamp has a pin extending from the base plate into a workpiece hole. Angled grooves in a cam surface are brought into contact with the hole sides to force the workpiece toward the base plate and hold the central area in place during machining.

Abstract: A universal hoist assembly for lifting large, heavy, structures. The assembly basically includes a housing which captures the base of a lift swivel while permitting free rotation of the base. An upright extension of the base extends out of the housing and has a transverse aperture through which a shackle is fastened. This arrangement permits the shackle to pivot and the extension to freely rotate, so that a lift can be conducted with structures of widely varying configurations without danger from sideloads on the lift assembly. Preferably, the base is either disk-shaped and housed in a corresponding recess for rotation in a plane or has a spherical exterior shape in a corresponding recess to permit rotation plus pivoting in any direction. The assembly may be fastened to a structure by a single central threaded bolt fastened to the housing and threaded into the structure or extending through a structure wall to a nut or by several spaced bolts.

Abstract: A workpiece indexing and clamping system for machining the workpiece. Spherical or narrow cylindrical heads of index pins extend from holes in a base plate into workpiece holes to align and index the workpiece. The pin portions in the base plate holes can be expanded to lock them to the base plate. Each pin has relief flats parallel to the pin axis. Clamps engage workpiece edges with thread-like angled grooves on a cam surface to force workpiece edges against the base plate during machining of the workpiece. A central clamp has a pin extending from the base plate into a workpiece hole. Angled grooves in a cam surface are brought into contact with the hole sides to force the workpiece toward the base plate and hold the central area in place during machining.

Abstract: A workpiece indexing and clamping system for machining the workpiece. Spherical or narrow cylindrical heads of index pins extend from holes in a base plate into workpiece holes to align and index the workpiece. The pin portions in the base plate holes can be expanded to lock them to the base plate. Each pin has relief flats parallel to the pin axis. Clamps engage workpiece edges with thread-like angled grooves on a cam surface to force workpiece edges against the base plate during machining of the workpiece. A central clamp has a pin extending from the base plate into a workpiece hole. Angled grooves in a cam surface are brought into contact with the hole sides to force the workpiece toward the base plate and hold the central area in place during machining.