Magnetizing apparatus for the magnetization of keys and rotors o

Details Magnetizing apparatus for the magnetization of keys and rotors o Magnetizing apparatus for the magnetization of keys and rotors o

1985-09-18

1987-07-21

Salce, Patrick R.

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

For magnetizing or demagnetizing

361147, 70413, H01F 720

Patent

active

046821376

ABSTRACT:
The invention relates to magnetizing apparatus for the magnetization with coded orientation of magnetic blades (6) to be embedded into two sides of a magnetic key shank forming part of a magnetic safety lock system, wherein tapering flux-conducting soft iron shanks (2, 4) are coupled to the poles of an exciting magnet (1) of the apparatus. Between the shanks is an air gap (3) into which a feeding mechanism feeds the blades (6) to be magnetized.
The magnet is a permanent magnet (1) made of intermetallic compounds of rare earth metals of shell 4f with transition metals of shell 3d by means of powder metallurgy or casting. The areas of the soft iron (2) which are contiguous to the air gap (3) are made of a material of high saturation value. The direction of the feed of magnetic blades (6) is parallel with the direction of the magnetic field (dipole) of the poles of the flux-conducting soft iron (2).
The invention also includes apparatus for the total through-magnetization of the rotor discs of the lock-inserts of magnetic safety locks. In this variant, there are two symmetric magnetic cirucits, with permanent magnets (1, 1a) made of intermetallic compounds as above, with pairs of soft irons (2, 2a) and tapering shanks (4, 4a) facing one another across an air gap (14) and being of opposite polarity.

REFERENCES:
patent: 4003336 (1977-01-01), Koester et al.
patent: 4043297 (1977-08-01), Hartmann et al.
patent: 4379276 (1983-04-01), Bouchara et al.
patent: 4382244 (1983-05-01), Koester et al.

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