Abstract: A building levelling system is provided for a building having a basement or foundation supported on expansive soil. A water management system is included for maintaining water in the expansive soil at a level adjacent the foundation to saturate the soil with water and thereby prevent the cyclic shrinking and expanding of the soil when the soil is normally repeatedly dried and wetted, causing damage to the building supported thereon. An injection system may also be included for injecting water into the soil spaced well below the foundation to lift a foundation which has already settled significantly due to shrinkage of expansive soil upon which it is supported. The injection system includes a level sensing mechanism for determining when a level of water in a prescribed area of the expansive soil falls below a reference level of the system and injectors for feeding water into that area.

Abstract: A building levelling system is provided for a building having a basement or foundation supported on expansive soil. A water management system is included for maintaining water in the expansive soil at a level adjacent the foundation to saturate the soil with water and thereby prevent the cyclic shrinking and expanding of the soil when the soil is normally repeatedly dried and wetted, causing damage to the building supported thereon. An injection system may also be included for injecting water into the soil spaced well below the foundation to lift a foundation which has already settled significantly due to shrinkage of expansive soil upon which it is supported. The injection system includes a level sensing mechanism for determining when a level of water in a prescribed area of the expansive soil falls below a reference level of the system and injectors for feeding water into that area.

Abstract: Most valve assemblies used in water closet tanks are relatively bulky and often interfere with the operative action of the tank. Furthermore, such valve assemblies are noisy in operation and "wire drawing" effects cause considerable wear of the valve seat and/or valve. This device includes a flexible diaphragm engageable with an annular valve seat and acting as a valve between the water intake and the interior of the tank. A spherical segment cam is mounted in the assembly operatively connected to a float and connecting rod moving reciprocally. The cam operates a plug sliding reciprocally in the body of the valve assembly, said plug engaging the diaphragm and controlling the opening and closing of the diaphragm with the valve seat. The mechanical advantage of the spherical segment cam gives a positive closing action plug minimizing the "wire drawing" effect and the construction of the diaphragm and associated parts eliminates thumping and hissing during the closing action.