04461475 is referenced by 19 patents and cites 5 patents.

A game machine has a plurality of targets which unpredictably come out and disappear from their corresponding holes at the surface of a table on a game stand. A player can only strike targets which are positioned above the surface thereof. A main shaft is provided with the target on its upper end and is supported by bearings in such a manner that it can rotate and move up and down. A plunger disposed at the periphery of the main shaft is magnetically attracted by an electromagnetic solenoid. When raised, the main shaft always faces a predetermined direction due to an action of permanent magnets. Hitting of the target can be detected by monitoring abrupt large fluctuations in current flowing through the solenoid during a period of time that the target is caused to appear above the table.

Title
Game machine having pop-up target
Application Number
6/337214
Publication Number
4461475
Application Date
January 5, 1982
Publication Date
July 24, 1984
Inventor
Masaya Nakamura
Tokyo
JP
Agent
Jordan and Hamburg
Assignee
Namco
JP
IPC
A63F 9/00
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