Magnetic sensor and card reader containing it

Details Magnetic sensor and card reader containing it Magnetic sensor and card reader containing it

1989-06-05

1991-10-15

Levy, Stuart S.

Registers

Coded record sensors

Particular sensor structure

235474, 360121, G06K 918, G06K 928, G11B 2103

Patent

active

050576780

ABSTRACT:
A magnetic sensor comprising a rotatable magnetic disc provided on its circular surface with a circular magnet belt having N and S magnetic poles alternately at a constant pitch; and a sensor means comprising a support and at least one sensor element having a plurality of magnetoresistive portions fixed to one or both surfaces of the support, the magnetoresistive portions being connected to each other in series and arranged radially at a constant interval in a point-symmetric manner on the support. This magnetic sensor is assembled in a card reader in which the magnetic disc serves as a roller rotatable with a card.

REFERENCES:
patent: 3549822 (1970-12-01), Chupity
patent: 3914789 (1975-10-01), Coker, Jr. et al.
patent: 3920960 (1975-11-01), Ditman
patent: 3949193 (1976-04-01), Dowdell
patent: 4275428 (1981-06-01), Lehureau
patent: 4304992 (1981-12-01), Kobayashi et al.
patent: 4345278 (1982-08-01), Double
patent: 4390905 (1983-06-01), Tokitsu
patent: 4460934 (1984-07-01), Yamada
patent: 4593328 (1986-06-01), Baus, Jr.
patent: 4605843 (1986-08-01), Aubrey
patent: 4812924 (1989-03-01), Fukami et al.
patent: 4827218 (1989-05-01), Meunier et al.
National Technical Report, vol. 31, No. 2, pp. 49-55 (1985).
Omron Technics, vol. 26, No. 3, 8 pp., and Abridged Translation, 1986.

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