Locks – Special application – For automotive vehicles
Patent
1998-10-29
2000-05-30
Gall, Lloyd A.
Locks
Special application
For automotive vehicles
70276, B60R 2504
Patent
active
060678240
ABSTRACT:
A lock for an automobile ignition system includes a sleeve having a cylindrical inner surface. A lock cylinder is provided which is rotatably mounted within the sleeve and has a cylindrical outer surface defining a cylindrical interface with the inner surface of the sleeve. The cylinder includes a keyway adapted for receiving a key used to rotate the cylinder between an off and start position. A differential magnetic comparator having a pair of magnetically sensitive areas is mounted on the sleeve for detecting when the cylinder is rotated to the start position to generate an ignition signal. A magnet is mounted to the cylinder interface for generating a magnetic flux and for activating the comparator when the cylinder is rotated to the start position. A difference in the magnetic flux density present on the pair of magnetically sensitive areas causes the comparator to generate the ignition signal. However, in the presence of a magnet external to the lock, the magnetically sensitive areas detect no difference in magnetic flux density which prevents the comparator from generating the ignition signal.
REFERENCES:
patent: 2767278 (1956-10-01), Collins
patent: 4399673 (1983-08-01), Gotanda
patent: 4518918 (1985-05-01), Avery
patent: 4692702 (1987-09-01), Huschelrath et al.
patent: 4745363 (1988-05-01), Carr et al.
patent: 4935698 (1990-06-01), Kawaji et al.
patent: 5045920 (1991-09-01), Vig et al.
patent: 5084674 (1992-01-01), Lachmann et al.
patent: 5115194 (1992-05-01), Luetzow et al.
patent: 5192877 (1993-03-01), Bittebierre et al.
patent: 5202580 (1993-04-01), Janssen
patent: 5241267 (1993-08-01), Gleixner et al.
patent: 5321355 (1994-06-01), Luetzow
patent: 5451868 (1995-09-01), Lock
patent: 5551267 (1996-09-01), Janssen et al.
patent: 5614821 (1997-03-01), Leiderer
patent: 5682095 (1997-10-01), Mathes et al.
patent: 5694040 (1997-12-01), Plagens
patent: 5862691 (1999-01-01), Friedrich et al.
patent: 5865049 (1999-02-01), Friedrich et al.
patent: 5878610 (1999-03-01), Friedrich
patent: 5890384 (1999-04-01), Bartel et al.
Gall Lloyd A.
Optek Technology, Inc.
LandOfFree
Automobile ignition security system using a differential magneti does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Automobile ignition security system using a differential magneti, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automobile ignition security system using a differential magneti will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1902295