发明名称 Magnetic ball lock for a pinball game
摘要 The play feature of the invention comprises a ball well and electromagnetic coil. A ball sensor is located near the well entrance to signal when a ball is detected. The electromagnet, disposed at the well entrance, attracts the ball from the playfield into the well where it is retained. To eject the ball, the magnet is reenergized and the ball is ejected form the well onto the playfield.
申请公布号 US5415403(A) 申请公布日期 1995.05.16
申请号 US19940260715 申请日期 1994.06.16
申请人 WILLIAMS ELECTRONICS GAMES, INC. 发明人 RITCHIE, STEVE;BIAGI, CARL A.
分类号 A63F3/02;A63F7/00;A63F7/26;A63F7/30;A63F9/00;(IPC1-7):A63F7/30 主分类号 A63F3/02
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