Sensor for detecting the position of a metal object

Details Sensor for detecting the position of a metal object Sensor for detecting the position of a metal object

G - Physics

01

V

G01V 3/12 (2006.01) A63F 7/02 (2006.01) G01B 7/00 (2006.01) G01V 3/08 (2006.01) G07F 17/34 (2006.01) G07F 17/38 (2006.01) A63F 3/02 (2006.01)

Patent

CA 2122901

ABSTRACT OF THE INVENTION. A sensor for detecting objects in pinball machines comprises a plurality of transmitting lines (22) being energized for generating a magnetic field, a board for supporting the transmitting lines (22), a plurality of reception lines (26) being electro-magnetically coupled with the transmitting lines (22) for detecting a magnetic flux change made by the approach of the metal object, and a board for supporting the reception lines (26). The transmitting lines (22) and the reception lines (26) are made of conductive thin films formed on their respective boards having turn forms having sending and returning paths. The transmitting lines (22) and the reception lines (26) are laid out in a direction to cross each other with the boards between.

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