Abstract: An anchor davit comprising an elongated U-shaped frame for receiving a main shank of an anchor; a roller at the outboard end of the frame for guiding the anchor line as it is lowered or raised; means at the outboard end of the U-shaped frame for providing chafe protection of an anchor line when the anchor is deployed and for providing captivity of the anchor when the anchor is being raised and secured; and means at a rear portion of the flat bottom portion juxtaposed the rear of the U-shaped frame for securing the U-shaped frame to a bow, a deck, a gunnel or another structural member of a boat. The means at the outboard end of the U-shaped frame for providing chafe protection of the anchor line and for providing captivity of the anchor comprises a smooth round rod.

Abstract: An AED includes a housing. Electronic circuitry is disposed in the housing for delivery of an electric shock to a stricken patient. A removable battery pack is selectively, operably, communicatively coupled to the electronic circuitry. The battery pack has an anticipatory detector for generating an anticipatory signal to the electronic circuitry. The signal indicates to the electronic circuitry that the disengagement of the battery pack from the AED is imminent. The present invention further includes a method for ensuring that the high voltage storage circuits of the AED are safely discharged prior to disengaging the battery pack from the AED.

Abstract: A skating vehicle has a frame with a blade or rollers mounted thereon and a boot for mounting a detachable shoe in a locked position thereon. The boot includes a rigid wall which encircles the sole of the shoe cradled within, and a rearward projection in the toe portion which enters a slot in the shoe sole when the shoe is inserted and moved forward, locking the shoe in the boot. A rear semirigid cuff is lined with a padding whose lower edge is proximate with and communicates with the upper edge of the shoe during skating. The cuff is closed with an adjustable latch which comprises the single device required to mount and dismount the shoe. The multi-use shoe includes a semirigid outer heel attached to the sole extremity and a semirigid outer tongue overlying the shoe upper.

Abstract: A catamaran design has a third hull positioned between the conventional hulls. The third hull has a length equal to about two-thirds of the length of the conventional hulls, and a recess is formed in the underside of the deck aft of the third hull. The recess has a depth sufficient to accommodate the rooster tail created by the third hull. The third hull enhances the buoyancy of the craft and prevents formation of waves under the leading end of the deck. The recess prevents the rooster tail from impinging against the underside of the deck. The third hull produces a concave wake and it is submerged to a similar extent as the twin hulls when the watercraft is at rest floating in a body of water. In combination, the third hull and recess provide a catamaran that can handle heavy seas, with control and safety, that is not subject to the pounding of waves on the underside of its deck, and which performs in all other respects like a conventional catamaran.

Abstract: A process for recovering silver present in cuprous chloride solutions as a soluble silver chloride which comprises saturating the cuprous chloride solution with sodium chloride, subjecting the saturated solution to evaporation to co-crystallize the sodium chloride and silver chloride, separating the solid chlorides from the liquid, recovering silver from the sodium chloride-silver chloride crystals and reclaiming the sodium chloride, adding water to the liquid and cooling it to crystallize cuprous chloride. The procedure is adaptable to processes for recovering copper from its ores in which copper is reduced to cuprous chloride in a leach slurry followed by cooling the leach slurry to crystallize out the cuprous chloride from which copper is recovered by conventional techniques.

Abstract: Copper is recovered from chalcopyrite by means of a pollution-free hydrometallurgical process which entails leaching and converting the chalcopyrite with copper sulfate in order to produce an insoluble copper sulfide, a soluble iron sulfate and sulfuric acid. A secondary leach is then conducted in order to react the copper sulfide with oxygen in the presence of a jarosite-forming cation to produce a soluble copper sulfate and an insoluble iron bearing jarosite. This copper sulfate is separated from the jarosite and sent to a copper recovery process and/or recycled. Alternatively, the copper sulfide from the initial leach may be separated from the iron sulfate solution immediately after the initial leach, and this copper sulfide can be treated with other processes to produce elemental copper and sulfur.