Abstract: A target launcher for launching a target in the form of a propeller-shaped, air foil or wing having a reversible motor with a launching head connected to the end of the motor shaft and which head includes a holder for releasably supporting thereon the propeller-shaped target. The motor is energized by a control circuit, which when activated, will effect rotation of the motor in one direction to retain the target in place on the launching head and to effect the release of the target when circuit is activated to reverse the direction of the motor. To vary the point of release of the target, the reversible motor is mounted to oscillate or rotate in as much as the motor is activated.

Abstract: A saw blade construction and method of forming such blade whereby the ends of a saw blade are abutted into end to end relationship to define an endless saw blade having a series of teeth formed along one edge to define a cutting edge, and having a back edge which is progressively sloped or tapered in opposite directions from an intermediate point on the back edge so that in a cutting operation the saw blade effects a cut along an edge portion of a workpiece on the down feed stroke of the blade and a progressive cut on the opposite edge of the workpiece whereby the teeth are rendered self-feeding on the progressive cut of the workpiece. In a modified embodiment the saw blade is formed with a plurality of alternate disposed down feed and progressive cutting edges.

Abstract: A method and construction of a saw blade whereby the ends of a saw blade are secured to define an endless saw blade construction which has a series of cutting teeth progressively arranged from leading to trailing end so that the respective teeth are rendered self-feeding. Each cutting tooth is formed with a relatively wide root which is inclined to define a clearance angle of 10.degree. to 15.degree..