Abstract: A fish lure simulative of a live insect has a resilient push frame which on a deflection thereof by a cam engaging the push frame, flexes wing parts of the lure upwardly, a release of the cam engagement allowing a bias present in the deflected push frame to restore it to a rest position, the wing parts being flexed downwardly to a complete the wing oscillation during restoration travel of the push frame. Oscillations at different amplitudes also can be produced by using camming surfaces on the cam which have different cam throws.

Abstract: A conveyor belt has a textured edge for use in a spiral conveyor which includes a plurality of protrusions on the edge of the belt engaging the capstan, providing enhanced friction between the belt and the capstan. The protrusions may be placed on end links or reenforcement links, and may be a part of rods connecting links of the belt. In one of the embodiments, the capstan is textured as well to provide an additional friction. As the result, the driving force is transmitted to the belt much more efficiently, and the practical use of the plastic conveyor belt in the spiral conveyor systems is possible. In one of the embodiments, the conveyor belt is made predominantly of plastic.

Abstract: A plastic sprocket wheel includes a sprocket body having a series of circularly spaced recesses located around a body circumferential edge, there also being a body side face opening in at least one body side face which communicates with the recess edge openings so that replaceable tooth elements can be slidably inserted into an associated recess when tooth replacement such as required when one or more teeth of an operating sprocket break or are rendered unusable. The replacement mounting requires no separate fastening devices for holding replacement teeth securely to the sprocket body, friction fit being sufficient to that end. The sprocket body is of resilient material such as an acetal, a polyethylene, a polypropylene etc., and the tooth elements can be of metal or the same material as the sprocket body, or such can be a combination of materials, e.g., a strong metal tooth piece molded in a resilient or plastic material core.

Abstract: A conveyor belt has a textured edge for use in a spiral conveyor which includes a plurality of protrusions on the edge of the belt engaging the capstan, providing enhanced friction between the belt and the capstan. The protrusions may be placed on end links or reenforcement links, and may be a part of rods connecting links of the belt. In one of the embodiments, the capstan is textured as well to provide an additional friction. As the result, the driving force is transmitted to the belt much more efficiently, and the practical use of the plastic conveyor belt in the spiral conveyor systems is possible. In one of the embodiments, the conveyor belt is made predominantly of plastic.

Abstract: A fixed radius conveyor belt for turn conveyors has a radially positioned plurality of rods which are wrapped with helically wound filaments bridging spaces between the rods to prevent conveyed objects from falling through the spaces between the rods. The filaments are maintained in the radial space between links which are attached to the rods at their ends close to an inside edge, and retainers attached at the ends of the rods close to an outside edge of the belt. The links engage one sprocket wheel of a conveyor, and the second wheel of the conveyor engages rods in an area adjacent to the retainers. Such an arrangement results in a belt which is structurally strong and can withstand conveyor jams and other irregularities in the conveying action without disintegration of the belt structure. The relatively simple construction of the belt permits easy assembly and allows production at a relatively low cost.

Abstract: A capstan for a spiral conveyor includes a plurality of grooves in the external surface thereof for controlling the driving friction between the outer surface of the capstan and the inner edge of a conveyor belt in contact with it. In one embodiment of the invention, the grooves are oriented vertically such that they contact the inner edge at an angle relative to motion therebetween. In another embodiment, the grooves are inclined to the vertical such that they contact the inner edge at right angles to the relative motion. In a further embodiment, the grooves are inclined generally parallel to the relative motion.