G - Physics – 01 – P
Patent
G - Physics
01
P
340/148
G01P 13/00 (2006.01)
Patent
CA 1222802
14 SEISMIC ACTUATION SYSTEM ABSTRACT OF THE DISCLOSURE A seismic actuation system incorporating a plurality of motion sensors. The motion sensors included a housing in which a weight is supported for slidable movement along a single direction within the housing. The sensors are mounted to a horizontally disposed enclosure. The sensors are arranged so that the directions of travel of the weights within the enclosures are uniformly arranged so that vibration of sufficient magnitude in the horizontal plane will cause one or more of the weights to move. By adjusting the mass of the weights, the sensitivity of the sensors can be adjusted. When a seismic event of sufficient magni- tude occurs, the weight becomes displaced from a central position within its housing and moves to one or the other end of the housing to activate the contacts. Activating the contacts completes a circuit so that one or more warnings, such as bells, lights, or spoken words, are produced or one or more safety devices are actuated.
460087
Fetherstonhaugh & Co.
Freeman Albert J.
LandOfFree
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