Abstract: A baseball practice bat having a main bat barrel, a movable handle portion, a fixed handle portion, a shaft running through the handle sections. The shaft may also run through the bat barrel. When properly aligned, a projection on one of the handles impacts the other handle, thereby creating a sharp crack, indicating that the practice swing was good. If the handles are not properly aligned, instead a soft thud is created indicated that the practice swing was not properly executed. The handles take the form of tubes surrounded by resilient grips. In one embodiment, a post extends from the movable handle and a resilient washer with a cut-away portion is located at the top of the fixed handle. When the handles are properly aligned, the post can impact the tube portion exposed by the cut-away portion of the washer. In another embodiment, projections extend from the tubes of the fixed handle and movable handle. When the handles are properly aligned, the two projections impact, creating the sharp crack.

Abstract: Baseball Practice Bat with a main bat barrel, a slidable handle portion, a non slidable handle portion, a rigid centrally located shaft running through the main bat barrel, the slidable handle portion and the non sliding handle portion, a non pinch flange located on the bottom of the slidable handle, the flange having a downwardly facing post, the smaller flange on the non moving handle having a rubber washer attached to its top surface, the washer having a cut out area where said downwardly facing post can penetrate and make contact with the metal portion of said non moving handle, and finger locator portions that are molded into the side of the sliding handle and non sliding handle that helps the user align his or her knuckles with respect to both handles.

Abstract: A drum-type sequencer operable in a ladder logic program and capable of being selectively stepped in various modes; that is, in forward stepped sequence, non-sequentially, and backwardly.