Title:
【発明の名称】スピード感知投射体
Document Type and Number:
Japanese Patent JP2001503652
Kind Code:
A
Abstract:
A speed-sensing projectile such as for example a baseball includes a generally spherical body. An inertial switch is positioned within the body and is actuable between open and closed conditions in response to accelerations of the body greater than a threshold value. A processor also within the body is responsive to the inertial switch and calculates the average speed at which the baseball is thrown over a fixed distance. A visible display on the body is in communication with the processor and displays the calculated speed.
Inventors:
David Sactin
Application Number:
JP52089898A
Publication Date:
March 21, 2001
Filing Date:
October 30, 1997
Export Citation:
Assignee:
David Sactin
International Classes:
A63B43/00; A63B69/00; (IPC1-7): A63B43/00
Attorney, Agent or Firm:
Nobuyuki Kaneda (2 others)