Magnetoresistant transduction device for reading low density cod

Details Magnetoresistant transduction device for reading low density cod Magnetoresistant transduction device for reading low density cod

1982-03-09

1984-03-27

Pellinen, A. D.

Registers

Coded record sensors

Particular sensor structure

360113, 235450, G06K 708

Patent

active

044396716

ABSTRACT:
A magnetoresistant transduction device for reading coded data comprises a plurality of magnetoresistances (MRI.sub.1 to MRI.sub.5), which are placed in alignment and spaced from a magnetization device (DAI) by means of a grid (GMI) of non-remanent magnetic material, having parallel elements (EFI.sub.1 to EFI.sub.5) situated between the magnetization device and the magnetoresistances and to which the magnetoresistances are secured either directly or by means of a substrate. The parallel elements serve to focus the magnetic field generated by the magnetization device, which may be in the form of a permanent magnet, such that a plurality of n mutually independent magnetic fields is formed, each field being associated with a corresponding magnetoresistance. The transduction device is applicable to the reading of coded data of very low density, utilized more particularly in franking machines.

REFERENCES:
patent: 3887944 (1975-06-01), Bajorek
patent: 4197987 (1980-04-01), Lazzari
patent: 4356523 (1982-10-01), Yeh
IBM--Tech. Disclosure Bulletin, vol. 16, No. 5, 10/73, p. 1372.

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