Motor vehicle door lock system

Details Motor vehicle door lock system Motor vehicle door lock system

1997-11-07

1999-03-09

Gall, Lloyd A.

Locks

Systems

Operation and control

70276, 70DIG30, E05B 4700, E05B 6536

Patent

active

058786104

ABSTRACT:
A motor vehicle door lock has a key operated lock cylinder signalling antitheft and locking-and-unlocking positions via Hall effect chips which include electronic circuitry working into evaluation circuitry connected to the chips. The chips themselves can be selected from a series of mass produced chips based on criteria including the magnetic thresholds and electrical thresholds of the chips provided that the thresholds of the evaluation circuitry are selected appropriately matching of each chip or its Hall effect element to the system is thoroughly avoided.

REFERENCES:
patent: 3124950 (1964-03-01), Nallinger
patent: 4399673 (1983-08-01), Gotanda
patent: 4565994 (1986-01-01), Mochida et al.
patent: 4910980 (1990-03-01), Katoh
patent: 5551267 (1996-09-01), Janssen et al.
patent: 5566562 (1996-10-01), Fujii

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