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Machine translation
1. (WO1981002602) MAGNETIC DECOUPLER
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1981/002602    International Application No.:    PCT/US1981/000139
Publication Date: 17.09.1981 International Filing Date: 30.01.1981
IPC:
E05B 73/00 (2006.01), H01F 7/02 (2006.01), E05B 47/00 (2006.01)
Applicants:
Inventors:
Priority Data:
127188 04.03.1980 US
Title (EN) MAGNETIC DECOUPLER
(FR) DECOUPLEUR MAGNETIQUE
Abstract: front page image
(EN)Magnetic decoupler (10) for use with an antitheft device. In one preferred embodiment, the decoupler includes a composite permanent magnet comprising an annular permanent magnet (12) that may be of ceramic and a second, preferably dis-shaped permanent magnet (14), which is preferably more strongly magnetized than the annular magnet and which preferably comprises a rare earth element. The two magnets are coaxially aligned with but axially displaced from each other and are oriented with the opposite polarity so as to create a region of especially great magnetic flux in the bore of the annular magnet. A cover plate (24), preferably of cold-rolled steel, may be provided adjacent the face of the annular magnet that is remote from the second magnet to further concentrate the flux in the bore.
(FR)Decoupleur magnetique (10) destine a etre utilise dans un dispositif antivol. Dans une realisation preferee, le decoupleur comprend un aimant permanent composite comprenant un aimant (12) permanent annulaire qui peut etre en ceramique et un deuxieme aimant permanent (14), de preference en forme de disque, qui est de preference aimante plus fortement que l'aimant annulaire et qui comprend un element de terre rare. Les deux aimants sont alignes coaxialement mais decales axialement l'un de l'autre et sont orientes avec la polarite opposee de maniere a creer une region de flux magnetique particulierement important a l'interieur du trou de l'aimant annulaire. Une plaque de couverture (24), de preference en acier lamine a froid, peut etre montee adjacente a la face opposee de l'aimant annulaire par rapport au deuxieme aimant de maniere a concentrer le flux dans le trou.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)