Acceleration actuated microswitch

Details Acceleration actuated microswitch Acceleration actuated microswitch

1999-09-24

2000-06-27

Friedhofer, Michael

Electricity: circuit makers and breakers

Special application

Change of inclination or of rate of motion responsive

H01H 3514

Patent

active

060809442

ABSTRACT:
A acceleration actuated microswitch that accurately detects accelerations in various directions is provided. A mass is supported by first beams in a space defined in a silicon substrate. The mass can be reciprocated in a direction perpendicular to the silicon substrate. A pair of second beams extend from the mass. Each second beam includes an electrode layer. A cover is secured to the silicon substrate. A pair of steps are formed in the inner surface of the cover. A pair of fixed contacts is located on each step. Each pair of contacts faces a corresponding electrode layer. When an acceleration having a certain magnitude is applied to the switch, the first beams are vibrated and the electrode layers contact the steps, which closes the switch.

REFERENCES:
patent: 5060504 (1991-10-01), White et al.
patent: 5111693 (1992-05-01), Greiff
patent: 5177331 (1993-01-01), Rich et al.
patent: 5383364 (1995-01-01), Takahashi et al.
patent: 5656846 (1997-08-01), Yamada
patent: 5777227 (1998-07-01), Cho et al.
patent: 5905203 (1999-05-01), Flach et al.

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