Apparatus for use in practicing pitching of baseballs

摘要

An apparatus for use in practicing pitching of baseballs to enable the user to improve pitching accuracy and to indicate pitched balls delivered within a strike zone having a vertical backboard with a rectangular opening therethrough, four trapezoidal shaped wings secured to the backboard and serving to form an opening defining a strike zone, each of the wings being pivotal when engaged by a baseball, electrical contacts activated as each trapezoidal wing is pivoted when struck by a baseball and electrical indicators for signaling when a baseball strikes one of the trapezoidal wings to indicate that the baseball has been pitched high, low, inside or outside of the strike zone.