초록 ▼

A seismic detector which generates an electrical signal in response to the occurrence of a vertical seismic wave predetermined magnitude is mounted in a weather-proof container in or adjacent an inhibitable building. A circuit breaker to interupt electrical power to the building is mounted in the sa

A seismic detector which generates an electrical signal in response to the occurrence of a vertical seismic wave predetermined magnitude is mounted in a weather-proof container in or adjacent an inhibitable building. A circuit breaker to interupt electrical power to the building is mounted in the same container and connected to open in response to signals from the detector. Gas and water line connections each with a solenoid operated shut-off valve are separately housed in a weather-proof container in or adjacent the building and the valves are connected so that they will close in response to a signal from the seismic detector. The entire system is rendered fail safe through the use of an interruptible power supply system housed in the container with the seismic detector and connected to energize the gas and water line cut off valves to hold them in open condition. In response to a signal from the seismic detector, however, the circuit between the power supply and the cutoff valves is opened which cuts off all utilities to the building.

대표청구항 ▼

A fail-safe control system for automatic cut-off of gas, electric and water utilities in a building in the event of an earthquake, comprising: (a) an uninterruptible power supply for providing continuous power to said system; (b) an electrical seismic detector means, being connected to said uninterr

A fail-safe control system for automatic cut-off of gas, electric and water utilities in a building in the event of an earthquake, comprising: (a) an uninterruptible power supply for providing continuous power to said system; (b) an electrical seismic detector means, being connected to said uninterruptible power supply, and having an output for triggering an electric current upon the occurrence of an earthquake; (c) a control relay being connected to said seismic detector means and obtaining power from said output of said seismic detector means; (d) electrically operated gas cut off means, being adapted to be positioned between the main gas supply and the building gas supply, and connected to said uninterruptible power supply, for interrupting the gas supply to the building upon an occurrence of an earthquake detected by said seismic detector means; (e) electrically operated water cut-off means, being adapted to be positioned between the main water supply and the building water supply, and connected to said uninterruptible power supply, for interrupting the water supply to the building upon an occurrence of an earthquake detected by said seismic detector means; (f) said gas and water cut off means being normally opened when energized and being closed when de-energized; (g) first normally closed contact of said control relay being connected in series with said gas cut-off means, and said first contact being opened when said control relay is energized by said seismic detector means upon an occurrence of an earthquake detected by said seismic detector means, thereby de-energizing and closing said gas cut-off means; (h) second normally closed contact of said control relay being connected in series with said water cut off means, and said contact being open when said control relay is energized by said seismic detector means upon an occurrence of an earthquake detected by said seismic detector means, thereby de-energizing and closing said water cut off means; (i) electrically operated breaker trip means, being connected to said uninterruptible power supply, for tripping the main power supply breaker to the building when said breaker trip means is energized upon an occurrence of an earthquake detected by said seismic detector means; (j) first normally open contact of said control relay being connected in series with said breaker trip means, and said normally open contact being closed when said control relay is energized by said seismic detector means upon an occurrence of an earthquake detected by said detector means, thereby energizing said breaker trip means and tripping the main power supply breaker to the building; and (k) said gas and water cut-off means and said breaker trip means being manually resetable after said seismic detector means has been activated in response to an earthquake.