Safety device actuatable by seismic vibrations

Details Safety device actuatable by seismic vibrations Safety device actuatable by seismic vibrations

1975-08-22

1977-06-07

Scott, James R.

Electricity: circuit makers and breakers

Special application

Change of inclination or of rate of motion responsive

200 615, H01H 3514

Patent

active

040285103

ABSTRACT:
An apparatus actuated by seismic vibrations and other vibrations is disclosed.
A vertically or substantially vertically movable rod, a weight or mass in engagement or capable of engagement with the rod and a plurality of pivotable stays or support arms supporting the weight are provided within a housing, and held in a mechanically balanced state in their entirety. When the apparatus undergoes seismic or other vibrations, the mechanical balance is disturbed, whereupon the weight is released from the support arms and allowed to fall together with the vertically movable rod due to the gravitational force, thereby effecting the switching of a related fluid or electric circuit.

REFERENCES:
patent: 2949783 (1960-08-01), Butler
patent: 3001039 (1961-09-01), Johnson
patent: 3560681 (1971-02-01), Webber
patent: 3588400 (1971-06-01), Fanes
patent: 3626764 (1971-12-01), Prachar
patent: 3703102 (1972-11-01), Prachar

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