Motion sensor

Details Motion sensor Motion sensor

1988-04-11

1990-02-06

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

33366, 340689, G08B 1324, G01C 906

Patent

active

048991325

ABSTRACT:
A motion sensor is provided having within a casing a resonant element with a magnet arranged therebeneath and a freely movable ball made from magnetizable material disposed there above. A change in the position of the ball causes a change in the density of the flow of the magnetic lines of force and as a result, a resonance voltage is produced in the resonant element thereby indicating motion. As the motion is detected by electronic means, high sensitivity is assured, and such sensitivity, furthermore, can be adjusted by simple means as required in a given case of application.

REFERENCES:
patent: 4587741 (1986-05-01), Rorden et al.

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