Velocity change sensor with magnetic field concentrator and dire

Details Velocity change sensor with magnetic field concentrator and dire Velocity change sensor with magnetic field concentrator and dire

1991-03-12

1992-10-06

Scott, J. R.

Electricity: circuit makers and breakers

Special application

Change of inclination or of rate of motion responsive

200 6153, 280735, H01H 3514, G01P 1508, B60R 2108

Patent

active

051533928

ABSTRACT:
An accelerometer for sensing velocity changes particularly suited for passenger restraint systems in a motor vehicle for the deployment of an air bag includes a housing with a magnetic closing element. The magnetic closing element includes a permanent magnet which generates a field around the sensor housing. A restricting element is mounted around the magnet for restricting and concentrating the magnetic field around the sensor. In an alternate embodiment, two similar sensors may be housed in a single enclosure for additional sensitivity. The restrictive elements of the sensors eliminate interference between the sensor magnetic fields.

REFERENCES:
patent: 3557628 (1971-01-01), Tsukada
patent: 3737599 (1973-06-01), Zuvela
patent: 4009460 (1977-02-01), Fukui et al.
patent: 4116132 (1978-09-01), Bell
patent: 4117401 (1978-09-01), Glauert
patent: 4221940 (1980-09-01), Roth
patent: 4262177 (1981-04-01), Paxton et al.
patent: 4329549 (1982-05-01), Breed
patent: 4827091 (1989-05-01), Behr
patent: 4873401 (1989-10-01), Ireland
patent: 5003259 (1991-03-01), Palazzetti et al.

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