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Title:
GAME MACHINE WITH ELECTROMAGNETIC BALL DETECTING DEVICE
Document Type and Number:
Japanese Patent JPS5982880
Kind Code:
A
Abstract:
A ball detector senses and signals the presence of a metal containing ball near preselected points on a game playfield. The ball detector is positioned to avoid contact with the ball and includes an electromagnet for generating a magnetic flux near the preselected points on the game playfield and a sensor for measuring the time rate of change of the magnetic flux induced by passage of the ball through the magnetic flux.

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Inventors:
DONARUDO EDOWAADO FUTSUKAA
Application Number:
JP17909683A
Publication Date:
May 14, 1984
Filing Date:
September 27, 1983
Export Citation:
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Assignee:
BALLY MFG CORP
International Classes:
A63F7/02; A63F7/30; A63F7/32; H03K17/95; A63F3/02; (IPC1-7): A63F7/02
Attorney, Agent or Firm:
Nobuyuki Iida



 
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