An integrating wave sensing and magnetic induction dartboard system
TW200821533A
Induction frame for a dartboard
US7108620B1
Game dart having ballast
DE102004025864A1
Electric percussion tool driving method, involves arranging time interval, during which solenoid is deenergized, longer than time interval, during which solenoid is energized, to allow spring unit to have longer time
DE102004001110A1
Dart game device, has line generator including housing with chamber in which circuit board is placed, and light generating device fixed on board in desired angle and behind lens for production of more reference lines on ground
DE10341814A1
Driving method for electric percussion tool, involves energizing and de-energizing solenoid again to move plunger core towards middle portion and then move in driving direction in addition to spring biasing force applied by spring
DE10251451A1
Time measurement unit with automatic time correction has a number of time keeping wheels with openings for the passage of a light beam so that it can be reflected from a reflector on the reverse side of the wheel
