Registers – Records – Conductive
Patent
1993-08-19
1995-06-13
Hajec, Donald
Registers
Records
Conductive
235493, G06K 1906
Patent
active
054245273
ABSTRACT:
A signal receiving coil in which an erroneous input of a signal due to an alternating magnetic field that has been accidentally generated is prevented. In this invention, a signal receiving coil includes a first spiral coil having a predetermined winding direction and a second spiral coil spaced from the first spiral coil. The second spiral coil is connected in series to the first spiral coil and has its winding direction opposite from that of the first spiral coil. The second spiral coil generates an induced electromotive force of substantially the same magnitude and opposite direction from the first spiral coil when both spiral coils are subjected to the same alternating magnetic field. When a change in a magnetic field is applied over the entire surface of the signal receiving coil, the induced electromotive forces generated by the two spiral coils cancel each other.
REFERENCES:
patent: 3669207 (1972-06-01), Fellgett et al.
patent: 4818853 (1989-04-01), Ohta et al.
patent: 5015834 (1991-05-01), Suzuki et al.
patent: 5068521 (1991-11-01), Yamaguchi
patent: 5182442 (1993-01-01), Takahira
patent: 5220158 (1993-06-01), Takahira et al.
patent: 5274221 (1993-12-01), Matsubara
Filipek Jeffrey R.
Hajec Donald
Mitsubishi Denki & Kabushiki Kaisha
LandOfFree
Signal receiving coil and non-contact type IC card using the sam does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Signal receiving coil and non-contact type IC card using the sam, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Signal receiving coil and non-contact type IC card using the sam will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1311039