Abstract: A cutting tool includes a frame, a shaft, a cutter and a cam. The shaft is rotatable about an axis. The cutter is coupled to the shaft such that rotation of the shaft about its axis causes rotation of the cutter about the shaft's axis. The cam is positioned around the shaft such that the cam contacts the frame upon rotation of the shaft. The cam has a cam surface which is distanced away from the axis of the shaft a varying amount such that contact of the cam with the frame upon rotation of the shaft causes the shaft, and thus the cutter, to reciprocate in a generally transverse direction relative to the axis of the shaft.

Abstract: A cutting tool includes a frame, a shaft, a cutter and a cam. The shaft is rotatable about an axis. The cutter is coupled to the shaft such that rotation of the shaft about its axis causes rotation of the cutter about the shaft's axis. The cam is positioned around the shaft such that the cam contacts the frame upon rotation of the shaft. The cam has a cam surface which is distanced away from the axis of the shaft a varying amount such that contact of the cam with the frame upon rotation of the shaft causes the shaft, and thus the cutter, to reciprocate in a generally transverse direction relative to the axis of the shaft.

Abstract: Disclosed is a window and lock assembly for releasably locking a sash component of a window in a closed position with respect to a frame component; wherein the lock assembly includes two catches mounted on said frame component at spaced apart positions. The catches are rotatably movable between locked and unlocked positions, wherein a slide bar connects the two catches. Rotation of the first catch causes rotation of the second catch, wherein in the unlocked position the first catch is rotationally closer to the first keeper than the second catch is to the second keeper.