Earthquake gas valve

An earthquake gas valve comprising:

• a main housing;
• a housing top cover;
• a pair of housing clamps;
• a rack member gasket;
• a housing gasket;
• a radial rack member;
• a gear motor;
• a battery;
• a drive gear;
• a gas closure member;
• a linkage arm;
• a separator plate;
• a printed circuit board;
• a plurality of shake switches;
• a microprocessor;
• said housing top cover attached to said main housing via said housing clamps;
• said housing gasket sealing said housing top cover to said main housing sealed in an airtight manner;
• said separator plate isolating the lower gas flow area from the upper electromechanical storage area;
• said radial rack member extending from said upper housing area to said lower housing area and through said rack member gasket;
• said drive gear attached to the shaft of said gear motor;
• said drive gear engaging said radial rack;
• said radial rack terminating at one end in said gas closure member;
• said closure member being made of a resilient material;
• said linkage arm attached to said radial rack member and pinned to a fulcrum hinge point located under said separator plate;
• said main housing including one or more gas inlet apertures and one gas outlet aperture;
• said battery capable of powering said gear motor;
• said gear motor caused to rotate when said shake switches sense physical movement and turn on said motor causing said gas closure member to fully obstruct said gas outlet aperture;
• and said microprocessor including a timing circuit that delays the activation of said gear motor for a pre-determined period of time to ensure that the movement is being generated by an earthquake and not by an accidental brief motion occurrence.