Earthquake actuated micro switch

Details Earthquake actuated micro switch Earthquake actuated micro switch

2005-07-12

2005-07-12

Friedhofer, Michael A. (Department: 2832)

Electricity: circuit makers and breakers

Special application

Change of inclination or of rate of motion responsive

C200S061520, C200S061530

Reexamination Certificate

active

06917004

ABSTRACT:
An earthquake actuated micro switch includes a ball which falls into a micro switch actuating position when disturbed. The ball normally resides in a shallow ball seat. A sufficient disturbance causes the ball to escape the ball seat, and fall into a switch seat. When the ball comes to rest in the switch seat, a lower surface of the ball pushes a micro switch actuator, thereby actuating the micro switch.

REFERENCES:
patent: 2312234 (1943-02-01), Brandt
patent: 2946867 (1960-07-01), Wehrig
patent: 3217120 (1965-11-01), Bowen et al.
patent: 4185507 (1980-01-01), Domyan
patent: 4261379 (1981-04-01), Berry
patent: 4789922 (1988-12-01), Cheshire
patent: 4903720 (1990-02-01), McGill
patent: 5119841 (1992-06-01), McGill
patent: RE38220 (2003-08-01), Engdahl
patent: 2002/0014264 (2002-02-01), Crane

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