| 摘要 |
PROBLEM TO BE SOLVED: To reduce malfunctioning with a simple structure. SOLUTION: When three or more magnets 1a, 1b, 1c and 1d (four in Fig. 1) are made to attract two or more conductors M1 , M2 and M3 (three in Fig. 1), the conductors M1 , M2 and M3 are connected electrically between the respective magnets and a series circuit conducts to let a current Is flow. Thus, ash electrical signal (voltage) Vs (=V) indicating the detection of the conductors M1 , M2 and M3 is outputted. |
