Abstract: A device for training a pitcher to complete his/her delivery with a full follow-through consists of a pliable, sheet-like tail member attached to an official-size baseball with conventional seams. Multiple apertures provided for the attachment of the tail member to the ball enable the tail member to be positioned relative to the seams so as not to obstruct various pitching grips. The ball is free to rotate independently of the tail member, so that the trainee pitcher can practice various pitches in which spin is applied to the ball. Upon completion of the pitcher's delivery, a full follow-through is indicated by an audible snapping of the distal end of the tail member.

Abstract: A first magnetic clamp embodiment (20) for bonding gas pipes or objects that need static electricity control object (13), includes a first and second magnetic members having poles consisting of parallel magnetic plains (10) and (11). A wire or conductor (12) connecting both magnetic members. A second magnetic clamp embodiment (220) for bonding gas pipe fittings or objects that need static electricity control, includes one magnetic member having poles consisting of parallel magnetic plains (20) a grounding rod (22) connected with a wire or conductor (21).

Abstract: A dual purpose welding clamp (20) includes a spring clamp (22) having upper and lower jaws. An upper conductor (30) is connected to the upper jaw, and a lower conductor (32) is connected to the lower jaw. The upper (30) and lower (32) conductors may be clamped about an object (502) to be welded. Alternatively, a magnet (26) and magnet housing (24) may be magnetically connected to a magnetic object (500) to be welded. A spring loaded terminal (38), which abuts the magnetic object (500) being welded is connected to lower conductor (32). In a second embodiment of welding clamp (120), spring loaded terminal (138) is disposed in a hole (125) in magnet (126).

Abstract: A welding clamp (20) includes a magnetic ground clamp (22) to which a removal tab (28) is attached. Welding clamp (20) may be removed from a magnetic object (500) by using removal tab (28) to lift clamp (20) from object (500). A second embodiment (40) has two welding clamps (20) welded to a hinge (42) between them. A bolt (48) in the hinge (42) secures the hinge so that the two clamps (20) remain in a fixed position in relation to each other.