Seismic initiator for earthquake shutoff valves and the like

Details Seismic initiator for earthquake shutoff valves and the like Seismic initiator for earthquake shutoff valves and the like

1993-05-03

1994-05-03

Nilson, Robert G.

Machine element or mechanism

Automatic operation or control

137 45, 251 65, 200 6145M, F16K 1736

Patent

active

053076990

ABSTRACT:
An acceleration-responsive magnetic device for closing a valve or operating a switch or the like in response to a disturbance such as an earthquake. A pendulum operates to increase the length of a magnetic path, releasing a magnetic element to perform the desired actuation.

REFERENCES:
patent: 5074327 (1991-12-01), Reid
patent: 5115829 (1992-05-01), Franzke

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