Abstract: A device for controlling the swinging of a boom on a sailboat comprising a line fixed at opposite ends to opposite gunwales of the boat and passing intermediate its ends about a drum secured to the boom.

Abstract: A prosthesis, adapted for fixation within the medullary cavity of a human bone, having an orthopedic device to which a nonresorbable, flexible membrane is attached in a liquid and air-tight manner. A flexible woven sheath encompasses the membrane and the prosthesis is provided with means for introducing liquid cement under pressure internally of the membrane to force the membrane and sheath outwardly into firm engagement with the walls of the bony cavity to fix the prosthesis in the cavity once the cement has hardened. The membrane prevents any chemical interaction between the cement and bodily fluids.

Abstract: A garment for human beings to cover at least the upper torso. On the garment is a decorative design having a specific cognitive orientation and is positioned such that the wearer readily recognizes the design. The design is further incorporated into an additional design having a specific cognitive orientation which is readily recognizable by a nonwearing observer.

Abstract: The invention relates to total hip joint replacements in humans in which the ball-like head of the femur and the cup-shaped cavity of the acetabulum are replaced by metal, plastic or ceramic substitutes and, more particularly, to a device for cutting screw threads in the wall of the acetabulum to receive a threaded substitute hip socket.

Abstract: The disclosure relates to a leg traction system having structure for supporting the leg and applying axial force to the leg. A rigid vector bar is positioned above the knee and lower leg, a pulley system including a cable and weight is connected at one end to the leg supporting structure and at the other end to the vector bar.

Abstract: A device for turning tubular fabric sleeves. The device comprises a narrow hollow inverting tube and a long rigid wire fabric puller. The fabric puller is equipped with a handle on one end and a plurality of helical turns on the other end. The last of the helical turns is arranged at a 90 degree angle relative to the centerline of the wire so as to form a ledge for the fabric sleeve to bear against.

Abstract: In a power tool for binding concrete-reinforcing bars together with a wire tie, a predetermined length of wire is fed into a pair of jaws having loop-forming grooves therein. A rotatable inner mandrel carries a cutter bar while an outer mandrel is rotatably mounted on the inner mandrel. Radial flanges on the outer mandrel form openings with the cutter bar for the passage of the wire as it is formed into a loop by the jaws. Relative rotation of the inner mandrel relative to the outer mandrel cuts the wire and then twists the cut ends into a wire tie that binds the reinforcing bar. Controls are provided for properly positioning the openings for the passage of the wire upon each successive cycle of operation.

Abstract: Gas flow through a turbine is divided, with part of the flow directed to the compressor for the combustion chamber and part directed to the primary power turbine. Division of the gas flow is accomplished by a mixing wheel of novel design. Before passing to the primary power turbine the gas flow passes through a secondary power turbine that drives the compressor for the combustion chamber. Both the secondary power turbine and the compressor rotate independently of the main turbine rotor shaft. The power input to the secondary power turbine is varied in accordance with the pressure differential between the gas pressure at the outlet of the compressor for the combustion chamber and the outlet from the mixing wheel. If the speed of the main turbine shaft slows down more power is put into the secondary power turbine and the combustion chamber compressor is speeded up so as to produce a higher gas pressure than would otherwise be the case.

Abstract: A garment fitting aid or device is made from a plurality of links pivotally joined together to form a chain of links with two free ends, the chain having first and second series or sets of links with curved edge portions at one side, and shorter intermediate links with curved edge portions at opposite sides whereby the intermediate links may be folded back upon themselves to shorten the length of the chain. In use, the links are pressed against the body of the person being fitted and the body contour curves so obtainable are then used to redraw the appropriate seam curves on a garment sewing pattern.

Abstract: In the electrolytic reduction of alumina an excess amount of cryolite bath is utilized to increase the amount of metal plated out. The carbon anodes are lowered into the excess bath to raise the liquid level of the bath above the normal operating level. Alumina is then added to saturate the upper portions of the excess bath and to form a thick crust over the pot. The carbon anodes are raised to their normal operating position and the bath periodically charged with alumina over the remainder of the run without breaking the crust. Molten aluminum leaches from the crust and augments the metal plated out and deposited at the bottom of the bath.