Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1983-07-01
1985-07-09
Swann, III, Glen R.
Communications: electrical
Condition responsive indicating system
Specific condition
200 6145R, 200 6153, 200DIG8, 200DIG20, 307117, G08B 2100
Patent
active
045285594
ABSTRACT:
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 magnitude 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.
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