Acceleration sensor

Details Acceleration sensor Acceleration sensor

1991-11-12

1993-03-23

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

051966611

ABSTRACT:
An accelerator sensor comprises a cylinder of a conductive material, a magnetized inertial member mounted in the cylinder so as to be movable longitudinally of the cylinder, a conductive member mounted at least on one end surface of the inertial member that is on the side of one longitudinal end of the cylinder, a pair of electrodes disposed at this one longitudinal end of the cylinder, and an attracting member disposed near the other longitudinal end of the cylinder. When the conductive member of the inertial member comes into contact with the electrodes, these electrodes are caused to conduct via the conductive member. The attracting member is made of a magnetic material such that the attracting member and the inertial member are magnetically attracted toward each other. The cylinder has a thick wall portion at the end of the cylinder where the electrodes are located. Chattering of the electrodes is prevented by a strong magnetic force of the thick wall portion which reduces the impact speed of the inertial member prior to engagement of the conductive member and the electrodes.

REFERENCES:
patent: 4329549 (1982-05-01), Breed
patent: 4827091 (1989-05-01), Behr
patent: 4933515 (1990-06-01), Behr et al.
patent: 5010217 (1991-04-01), Hueniken et al.
patent: 5053588 (1991-10-01), Bolender

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