Earthquake detection device

Details Earthquake detection device Earthquake detection device

1995-08-14

1998-03-10

Husar, Stephen F.

Illumination

Light source and modifier

Condition responsive

362205, 362802, 200 6145R, 340690, F21V 2500

Patent

active

057253013

ABSTRACT:
An earthquake detection device with an innovative mechanism capable of sensing vibrations. The device is an open electrical circuit that, when triggered by sufficient vibration, becomes a closed circuit, thus enabling a variety of electrical appliances. The inner mechanism of the present invention works much like a conventional pulley. A weighted object, when agitated by sufficient vibration, causes a balance beam to fall out of a delicate equilibrium, thereby causing a hammer to fall on two receptacles which carry the electrical circuit, thus closing the circuit and enabling the electrical appliances.

REFERENCES:
patent: 3813505 (1974-05-01), Shoji
patent: 4357648 (1982-11-01), Nelson
patent: 4408196 (1983-10-01), Freeman
patent: 4789922 (1988-12-01), Cheshire
patent: 4841288 (1989-06-01), Addicks
patent: 5365145 (1994-11-01), Fields
patent: 5418523 (1995-05-01), Anderson et al.

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