Abstract: A projectile includes a body having one of a number of geometric shapes which have a plurality of blades. The projectile may be divisible into two substantially equal portions. The portions have a number of blades disposed across their respective surfaces. Moreover, a blade may encircle the periphery of the projectile and may be sandwiched between the portions once assembled to one another. In one embodiment, the blades may be removed so that they may be replaced when they become dulled through use. Alternatively, the blades may be removed, sharpened, and returned to their appropriate positions on the projectile body.

Abstract: The bladed projectile dart disclosed has a bladed head that has a plurality of separable blades that allow for individual replacement. The dart has a hollow shaft that surrounds a draw line which allows for pulling back the projectile when it is mounted in a special slingshot launching device. The draw line is attached at one end to a hub that maintains the blades in formation. The blades are detachable from this hub when the head is lodged in a target. The other end of the blades have a pointed cap that is threadedly mounted to the blade tips. Also described are various launching mechanisms for launching the darts.

Abstract: A slingshot is constructed to produce the maximum projectile velocity with a minimum of force exerted by the user and includes a cable assembly cooperating with a plurality of pulley assemblies. A pair of draw pulley assemblies are mounted upon a fixed frame and are joined, by the cables, to a pair of pulley assemblies carried by the free ends of two resilient limbs extending forwardly and upwardly from their attachment to the frame. A handle assembly, fixed relative the frame, includes an arm guard extending forwardly and rearwardly of the frame and is engaged by a substantial length of the user's arm to stabilize the slingshot during its use.

Abstract: This invention relates to a process for recovering magnetite from fly ash. Fly ash containing magnetite is made into a slurry having 5% to 10% solids by weight and the slurry is then concentrated in a settling tank to a slurry having approximately 20% solids by weight. The concentrated slurry is delivered to a magnetic separator where the magnetite is separated from the remainder of the fly ash. The magnetite is then crushed in a pulverizer to a size so that 95% of the crushed magnetite will pass through a 325 mesh sieve. The crushed magnetite is then delivered to a second magnetite separator which is weaker than the first magnetic separator to separate the crushed magnetite from any impurities. The purified crushed magnetite is then dried and stored.