Abstract: Methods and apparatus are provided for harvesting aquaculture from a body of water. The apparatus includes a continuous belt which is partially submerged in the water. A flow of water is created which forces aquaculture against the moving belt and the belt then lifts the aquaculture into the vessel. The aquaculture is then deposited on a moving belt which initially filters out a selected species from the aquaculture and deposits the selected species in a settling compartment. The selected species is then pumped from the settling compartment to a second compartment. The selected species may then be passed through another filtering system comprised of a tube with a formed wire spirally wound thereabout. The spacing between the wound wire may be varied so that only the selected species having a specific size may pass therethrough.

Abstract: A cylinder head for an internal combustion engine includes a helical inlet port with a sharp edge swirl lip on a generally cylindrical valve stem recess. The helical inlet port has an inlet passage, a bowl-shaped chamber which has a rim that terminates in an annular valve seat and which encompasses an annular space about a generally cylindrical valve stem guide for a poppet valve stem. One surface of the bowl meets one wall of the inlet passage along a swirl edge, which has a radius of less than about 0.5 mm, and preferably a sharp edge with a radius of less than about 0.1 mm. Such swirl edges may be formed by casting the inlet port with excess material, which is then machined away only within the bowl along a cylindrical cutting line.

Abstract: The present invention provides herbicidal emulsifiable suspension concentrate compositions of imidazolinyl benzoic acids, or esters or salts thereof, and dinitroaniline herbicides. Such compositions have improved low temperature stability.

Abstract: A system for producing a three-dimensional image of a surface, such as a surface of a cornea, includes a laser beam that passes through a beamsplitter and an objective lens to produce a spherical wavefront that impinges on the cornea and is reflected by the cornea as a return beam back through the objective lens. The return beam is reflected by the beamsplitter through an imaging lens that focuses the return beam onto an imaging screen, through a dual phase plate, and onto a photosensitive array. The dual phase plate includes two sets of spaced periodic refractive features spaced along orthogonal directions. The phase plate is modulated by incrementing it at a 45 degree angle relative to the first and second directions, thereby simultaneously producing phase shear along the two orthogonal directions.

Abstract: To retain a lamp in a reflector body of a light assembly, a wire retaining clip is provided which has a U-shaped anchor portion disposed as a friction fit in a recess in the body. Arms of the clip extend in cantilever fashion from the anchor portion and engage against a flange on the lamp so as to urge an abutment surface on the lamp into engagement with a corresponding abutment surface in the reflector body. The arms of the clip are resiliently biassed in the same direction as that required to bring said abutment surfaces into mutual engagement and are also resiliently deformable outwardly so as to facilitate snap-engagement of the lamp into a lamp-receiving aperture in the reflector body.

Abstract: A pipe coupling includes a nut in which a collet, a back-up member and an anti-extrusion washer are retained by means of an axially split ring which is detachably engageable in a peripheral groove in the back-up member and engaged in a recess in the nut. The anti-extrusion washer has an extrusion press fitted into the member. This construction permits the various parts to be easily assembled into the nut without the risk of damaging the ring or the screw-threading in the nut.