Electricity: circuit makers and breakers – Special application – Change of inclination or of rate of motion responsive
Patent
1991-07-16
1993-04-27
Scott, J. R.
Electricity: circuit makers and breakers
Special application
Change of inclination or of rate of motion responsive
200 6153, H01H 3514
Patent
active
052064697
ABSTRACT:
The crash sensor of the present invention comprises a magnet, a sensing mass made of a ferromagnetic material and attractable by the magnet, a sleeve made of a paramagnetic material and restricting the movement of the sensing mass in one direction, a pair of strips that make a closed circuit by contact with the sensing mass having moved in one direction and a body fitted with the magnet and housing the sensing mass, the sleeve and the contacts; the crash sensor further comprising a magnetic shield made of a ferromagnetic material and covering the magnet and the body. The magnetic shield forms a closed-type magnetic field by covering the magnet and the body and forms an appropriate magnetic loop in the vicinity of the sensing mass, so that the crash sensor also acts as a magnetic shield to protect itself from being influenced by outside ferromagnetic bodies and makes effective use of the magnetic force of the magnet. The above pair of strips are fitted in the same direction vertically on the inner wall of the body, whereby they do not project out in the axial direction so that the crash sensor can be of a reduced whole length, as well as of smaller outside diameter than conventional crash sensor with its contacts positioned facing each other.
REFERENCES:
patent: 4827091 (1989-05-01), Behr
patent: 4914263 (1990-04-01), Behr
patent: 4933515 (1990-06-01), Behr et al.
patent: 5010217 (1991-04-01), Hueniken et al.
patent: 5012050 (1991-04-01), Sewell
patent: 5053588 (1991-10-01), Bolender
patent: 5153392 (1992-10-01), Husby et al.
Imanishi Etsujiro
Kakiya Masaharu
Kita Kazuyuki
Kuroiwa Akihiko
Minekubo Koji
Scott J. R.
Sensor Technology Co. Ltd.
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