Games using tangible projectile – Playing field or court game; game element or accessory... – Practice or training device
Reexamination Certificate
2008-03-24
2010-06-01
Kim, Gene (Department: 3711)
Games using tangible projectile
Playing field or court game; game element or accessory...
Practice or training device
C473S233000, C473S457000
Reexamination Certificate
active
07727090
ABSTRACT:
A training baseball bat has an internal movable magnet that accelerates to the end of the bat when swung at a fast enough speed. As the magnet moves it passes through a coil that is connected to one or more LEDs so that the LEDs momentarily flash as the magnet moves through the coil. A stationary magnet can be used to hold the movable magnet until sufficient centrifugal force is imparted by the swing to overcome the magnetic holding force. Spacers can be provided to establish a distance between the magnets as needed to establish a desired swing speed at which centrifugal force overcomes the magnetic attraction.
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Chambers M
Gant Richard Alva
Kim Gene
Rogitz John L.
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