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US 5,684,444 AGranted
Coding head for the magnetization of layers
AssigneeBogen Electronic GmbH
InventorsHelmut Becker, Jan-Thomas Rebsch
Life of this patent
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Abstract
A coding head for applying magnetic codes onto magnetizable layers of scales, graduations, angle encoders, transport belts and the like has a magnetic pole (10) about which a coil (12) is wound, the saturation induction of the magnetic pole being selected in dependence upon the coercive field strength of the magnetizable layer (18). In this case, the saturation induction (in Tesla) has a specified relationship to the coercive field strength (in kOe).
Claims8
A coding head for applying magnetic codes onto a magnetizable layer having varying thickness and a coercive field strength H.sub.c, comprising:
- a magnetic pole;
- at least one coil wound about the magnetic pole;
- the magnetic pole having a saturation induction B.sub.s and a surface from which magnetic lines of flux emerge, the surface being capable of orientation substantially parallel to the magnetizable layer;
- the saturation induction B.sub.s of the magnetic pole being selected in dependence upon the coercive field strength H.sub.c of the magnetizable layer wherein:
- B.sub.s (Tesla).congruent.0.4.times.H.sub.c (kOe) for layer thicknesses of essentially 0.01 to 0.09 mm;
- or
- B.sub.s (Tesla).congruent.0.2.times.H.sub.c (kOe) for layer thicknesses of essentially 0.4 to 1.0 mm.
4 more elements
Dependencies are inferred from the claim text.