Metal body detecting apparatus for detecting location of metal body and a sensing matrix assembly used therefor

Patent 5605329 Issued on February 25, 1997. Estimated Expiration Date:

December 1, 2014. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Inventors

Assignee

Kabushiki Kaisha Ace Denken

Application

No. 307783 filed on 12/01/1994

US Classes:

273/121B, Pachinko (i.e., nearly vertical playing surface)273/121AElectric or magnetic

Examiners

Primary: Harrison, Jessica J.
Assistant: O'Neill, Michael

Attorney, Agent or Firm

Lowe, Price, LeBlanc & Becker

Foreign Patent References

63-26720 JP. 02/13/1988
2-279186 JP. 11/13/1990
4002378 JP 01/13/1992
4-122375 JP. 04/13/1992
2230463 GB 10/13/1990

International Class

A63F 007/02

Foreign Application Priority Data

1992-04-16 JP

Abstract

A metal body detecting device having a sensing matrix (20) and a signal processing system (170) for driving the sensing matrix. The sensing matrix comprises a plurality of transmission lines (22) and a plurality of reception lines (26) arranged in rows and column respectively, and a wiring board (17) for supporting these lines. Each of the transmission lines and reception lines consists of a pair of lead wires formed of an outward path and a return path being in parallel each other. The pair of lead wires is connected at one end, and are used, at the other end, as an input and an output end of a signal. The wiring board includes a transmission terminal unit (23) and a reception terminal unit (27) and an area on which the transmission lines and the reception lines are wired. The wiring board further includes circumventive wiring (64) for transmission lines for connecting the input/output end of the transmission lines to the transmission terminal unit, and circumventive wiring for reception lines for connecting the input/output end of the reception lines. At least one of the circumventive wiring for transmission and the circumventive wiring for reception, is provided with individual wiring for only one of the input/output end of the outward path and return path of each pair of lead wires, and common wiring is provided for the other end.