Electricity: measuring and testing – Magnetic – With means to create magnetic field to test material
Reexamination Certificate
2006-07-04
2006-07-04
Patidar, Jay (Department: 2862)
Electricity: measuring and testing
Magnetic
With means to create magnetic field to test material
C194S320000, C324S239000, C324S242000, C324S243000
Reexamination Certificate
active
07071685
ABSTRACT:
A planar induction sensor for sensing of security features of documents having changing magnetic and (or) conducting properties is of a multilayer printed circuit board design. The sensor comprises a planar current transformer with a spiral-type primary coils and one or several turns of secondary coil in an adjacent layer of the printed circuit board. The secondary coil of the current transformer is connected to an operating coil, which is situated at a sensing edge of the sensor. The operating coil can be formed by external wires or can be incorporated in the circuit board of the current transformer. When a security element, made from the magnetic or conductive material moves past the sensing edge of the sensor, a change in inductance of the induction sensor occurs. In a preferred embodiment, two induction sensors with individual associated electronic circuits were located on opposite sides of validator channel. Analysis of both signals from the sensors allows correction of the signal to reduce variation caused by changing distance of the security document from each sensor.
REFERENCES:
patent: 4253079 (1981-02-01), Brosh
patent: 4864238 (1989-09-01), Seitz
patent: 5014006 (1991-05-01), Seitz
patent: 5278500 (1994-01-01), Seitz
patent: 5576224 (1996-11-01), Yakura et al.
patent: 5614824 (1997-03-01), Dames et al.
patent: 6057683 (2000-05-01), Khvostov
patent: 6382386 (2002-05-01), Gaponyuk et al.
patent: 2002/0110396 (2002-08-01), Tadashi
Androsyuk Sergiy
Barchuk Volodymyr
Baydin Dmitro
Gaponyuk Gennadiy
Grzhibovskyy Vitaliy
CashCode Company Inc.
Jackson Tyrone
Patidar Jay
LandOfFree
Induction sensor using printed circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Induction sensor using printed circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Induction sensor using printed circuit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3541739