Spinning target assembly

作者: Max Wiczer

DOI:

关键词: Bridge (interpersonal)EngineeringStructural engineeringSpinningMechanical engineering

摘要: The spinning target assembly comprises a post rotatably mounted to the playfield board of pinball game. A bridge extends over and is substantially parallel board. Three units hang downwardly from bridge. carried thereby are rotatable about axis any selected position. Each unit includes pair supports therebetween thereby. switch associated with each located in sense number revolutions target.

参考文章(5)
J Lally, C Foster, Lock-out ball bumper switch ,(1972)
Frank G Nicolaus, Bumper switch for ball-rolling games ,(1941)
Arthur E Stokes, Putting target device ,(1952)