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A vibration activated device is provided for closing a utility gas valve. A control lever on the valve is held in the open position by a latch which fits into a latch groove in the end of the control lever of the valve; a spring is attached to the control lever to pull the valve shut when the latch

A vibration activated device is provided for closing a utility gas valve. A control lever on the valve is held in the open position by a latch which fits into a latch groove in the end of the control lever of the valve; a spring is attached to the control lever to pull the valve shut when the latch is released. The shock waves of the earthquake move a pendulum which then moves an activator which then moves a pivot arm which moves a latch located thereon to release the valve control lever. When the valve control lever is released, a spring pulls the end of the valve control lever to turn it to the closed position. The device is designed to operate on a valve located in either a vertical or a horizontal pipeline.

대표청구항 ▼

A device to close a gas valve during an earthquake, comprising: a. A base of aluminum or other hard material which is fastened to a commercial utility gas valve altered by a latch groove on the end of the valve control lever, b. a pivot arm fastened to said base, c. an activator fastened to said piv

A device to close a gas valve during an earthquake, comprising: a. A base of aluminum or other hard material which is fastened to a commercial utility gas valve altered by a latch groove on the end of the valve control lever, b. a pivot arm fastened to said base, c. an activator fastened to said pivot arm at one end, d. at least one latch fastened on said pivot arm in the proximity of said latch groove on the end of said valve control lever when said valve control lever is in the open position, e. a trigger which when moved raises said activator, f. a pendulum fastened to said trigger at one end which swings to move said trigger, a pendulum bracket fastened to said base and containing a hole in which said trigger sits, h. a control spring fastened to said base at one end and to said valve control lever at the other end, so as to pull said valve control lever to the closed position when said latch is released from said latch groove, and i. a means of fastening said base to said valve.