Cylinder lock and key device

Details Cylinder lock and key device Cylinder lock and key device

1997-03-11

1998-10-20

Gall, Lloyd A.

Locks

Operating mechanism

Using a powered device

70277, E05B 4900

Patent

active

058230289

ABSTRACT:
A key-operated cylinder device includes a cylinder device body into which a key having a secondary coil is inserted, the cylinder device body including a coil mounting portion forming the front end portion of said cylinder device body; a primary coil mounted in said coil mounting portion, the primary coil wound on a coil bobbin; and shielding device for preventing the magnetic flux of the primary coil from flowing into the cylinder device body, the shielding device being arranged between the coil mounting portion and the primary coil.

REFERENCES:
patent: 4918955 (1990-04-01), Kimura et al.
patent: 4924686 (1990-05-01), Vonlanthen
patent: 4939915 (1990-07-01), Vonlanthen
patent: 5003801 (1991-04-01), Stinar etal.
patent: 5043593 (1991-08-01), Tsutsumi et al.
patent: 5117097 (1992-05-01), Kimura et al.
patent: 5195341 (1993-03-01), Niewkoop

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