Abstract: The present invention is related to an apparatus and method of constructing walls of framed block assemblies including both exterior and interior partition walls which are assembled through an interlocking structure having dovetail tongues interlocked with dovetail channels. Includes are a plain wall, a wall with mortar for ornamentation, and a wall applied with straight longitudinal blocks.

Abstract: The present invention is a unique semi-automatic mop wringer. The mop wringer comprises a hollow housing vertically movably supported on a supporting structure by a suspension mechanism. The housing is engaged with the supporting structure through a rack-and-gear mechanism, so that a downward motion of the housing can be transmitted into the rotation of crank members which in turn drive a wringer roller to squeeze the mop against a wringer plate mounted inside the housing. A user can use the present invention mop wringer to wring a mop by placing the mop inside the housing, holding the mop holder and applying a downward force. The downward motion of the housing causes the wringer roller to move in a circular path to squeeze the mop against the wringer plate. When the user withdraws the downward force, the housing moves back upwardly to allow the user to repeat the process.