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You are an expert at summarizing long articles. Proceed to summarize the following text: 
[0001]    Mold for making mortar-less interlocking, split-face blocks, made by changing and deleting some parts of the mold described in U.S. Pat. No. 4,896,472, which makes the regular interlocking block, so that the resulting mold will produce a 12″×8″×12″ block that can be split into 6″×8″×12″ split-face block and/or produce a 16″×8″×16″ block that can be split into two 8″×8″×16″ split-face blocks. 
       OBJECTIVE OF THE INVENTION 
       [0002]    The objective of the invention is to build mortar-less, interlocking, split-face blocks for construction of residential dwellings and commercial buildings that require no skilled labor. 
       BACKGROUND OF THE INVENTION 
       [0003]    The invention relates to a building block and a system to facilitate the construction of buildings, walls, cross walls and the like without the need of special equipment or techniques. The essential idea is to provide a full block and a system using the full and two other types of interlocking blocks, the basic system being three blocks. The blocks are designed to firmly lock together and thus the construction does not require the traditional mortar or cement to bond it together. This is due to the selection and position ears protruding from at least the full block and grooves in all the blocks that fit on said protruding ears. As a result, it is possible to interlock said blocks in parallel, longitudinally or transversely. Thus, with this system any simple or complex structure may be built. 
         [0004]    This application claims a benefit of an earlier provisional application 360/839,200 filed Aug. 22, 2006. Also applicants are elderly, one is 78 and the other is 80 so we wish to ask for and expedited application process. 
     
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0005]    The system comprises the combination of two basic building blocks: a full block; and a half block. 
         [0006]    These blocks should be manufactured with precision for interlocking without the use of mortar. Load-bearing structures can be built therewith. 
       The Full Block 
       [0007]    As shown in  FIG. 1 , the full block is a rectangular configuration of two spaced, parallel end walls and two spaced, parallel side walls extending longitudinally of the block between the therefore transverse end walls. The side and end walls have respective external faces  101 ,  102  and define an open-ended internal cavity extending between top and bottom faces  108 , 109 , respectively, of the walls and, therefore, of the open-ended internal cavity. 
         [0008]    The middle web  103  extend transversely of said block and, therefore, parallel to it end walls between internal faces of the side walls for separating the open-ended internal cavity into two end cavities of substantially equal size of one end wall, one internal face of one end wall, one internal face of one middle web, and the intervening internal faces of side walls. 
         [0009]    An ear  107  on a central web protrudes from the top face  108 , each ear being of substantially the same dimensions. Each ear has a transversely extending surface  104  delimiting the extent of said ear toward said central web and oppositely disposed, longitudinally extending surface  114 , each delimiting the extent of said ear toward the proximal wall. 
         [0010]    A groove is in the internal face of the end and side walls of each end cavity. Each said groove extends from the bottom face  109  toward the top face  108  at least as far as the ears  107  project from the top face  108 . Each groove is defined by a groove face  100  and adjacent opposite edges  106 . 
         [0011]    The side edges  106  of the groove in each end wall are each spaced from the external face  101  of the proximal side wall a distance x substantially the same as the distance from the longitudinally-extending surfaces  114  of the ears  107  respectively to the same, proximal side wall faces. Each transversely-extending surface  104  of each ear is spaced from the external face  102  of the proximal end wall a distance Y substantially one half the external length of a side wall minus the distance Z of the face of the groove  100  Z in the proximal end wall to said external face  102  Z of said end wall. The side edge  106  Z proximal the end wall of the groove in each said side wall is substantially the same distance ZX from the external face  102  Z of said proximal end wall as the distance X of each longitudinally-extending surface  114  of each ear to the external face  101  of the proximal side wall. 
         [0012]    As a result, as shown in  FIG. 1 , an ear and groove of three adjacent blocks A, B and D or B, C and E can be male-female interlocked with external side and end faces of one bloc flush in a longitudinal orientation, like block A, B and D, or transverse orientation, like blocks B, C and E. The full block is such, therefore, that three such blocks in sequence are adapted to form a running bond of longitudinal or transverse orientation of the sequential full blocks. In the longitudinal orientation, each groove  100 AD,  100 BC in each end wall of one full block D respectively male-female interlocks with one ear  107 AD,  107 BD of each of the other two full blocks a, B the external faces  102  of the end walls of the other full blocks A, B being in mating relationship at  102  and the external faces  101  of the side walls of each full block being parallel and respectively flush with the external faces of the side walls and one groove  100  CE in one side wall of one full block E respectively male-female interlocks with one said ear  107 BE,  107 CE of each of said other two full blocks B, C, the external faces of side walls  101  of full E block being transverse to the external faces of the side walls  101  of at least one of said other two full blocks B, C. 
         [0013]    In other words each groove extending from the bottom toward the top face at least as far as the ears project from the top face is positioned, shaped and dimensioned so that an ear and groove of adjacent block can be male-female interlocked with one external face of one block flush with an external face of another block foe either longitudinally or transverse orientations of the blocks. 
       Mold Design 
       [0014]    In the manufacture of conventional blocks only one bar  400 B is used for the cores. The bar  400 B is located along the top face of a mold for concrete blocks to support steel cores  401 B to form a cavity or hollow in a concrete block. The mold method herein described uses twin, i.e. two parallel-spaced core bars  400 A for supporting steel cavity-forming  401 A in a block forming press mold. The positions of the twin bars  400 A can be approximately 6 mm from opposite longitudinal edges ( 114  in  FIG. 3 ) of the protruding ear  107  to a position of approximately 3 mm with relation to the external edge of the steel core. 
         [0015]    Molding guides  407  in  FIG. 4  on sections of the twin bars at the area of the top face  403 A and extend downward between the steel cores  401 A to the frits levels defined by top face  404 A ( 108  in  FIG. 4 ) of said block aside from the ear projections. These are in the 6 mm space between the twin bars  400 A and the longitudinal sides face  408 A of the projections at  403 A as delimited by the steel cores  401 A. The molding guides  407  are removable. 
         [0016]    The contours are such that each external face has at least one protruding portion  150  and at least one receding portion  152 , the side external faces each having two of each such potions. The depth from and into the block of the protruding and receding portion of the contours together define an average face (only one shown) at  154  of each wall which is shown in phantom because not real. The average face at  154  corresponds to the face from which various distance have heretofore been described as being measured. 
         [0017]    In the embodiment of  FIG. 2 , the average face of the walls corresponds with the non contoured portion of the side and end external faces  101 ′,  102 ′ at the ends of each wall and also at the middle of the side walls. A marker groove  156  extends parallel to the contours at the middle of the side faces to mark this location for alignment with an edge of an end or side face of another full block in a construction of such blocks. This helps get the external faces of the block flush in transverse orientation of the blocks and helps position the blocks in a construction for the grooves and ears to interlock. 
         [0018]    The protruding and receding portion of the contours on opposite end and side faces of the block are complimentarily positioned for nesting with those of another full block similarly oriented relative to the top and bottom faces when complementary end or side faces of the blocks mate. This prevents relative movement of the blocks transverse of the contours and, when there are two such blocks with the ears and grooves thereof interlocked, too, adapts the block for forming rigid structure. 
         [0019]    It will be understood that various other characteristics and features of the invention are apparent from the drawings that such variations of any characteristics or features of the invention as may occur to one of ordinary skill in the art are contemplated by the following claims to the invention. 
       BRIEF DESCRIPTION OF THE DRAWINGS 
       [0020]    Merely-preferred embodiments, which do not limit the invention, are shown in drawings, wherein: 
         [0021]      FIG. 1  is a prospective top and bottom view of a group of full blocks. 
         [0022]      FIG. 2  is a bottom view of a block before it is split to make a 6×8×12 split-face block. 
         [0023]      FIG. 3  is a top plain view of a shoe assembly of the block molding. It is also a top view of a block before it is split to make a 6×8×12 split-face block. 
         [0024]      FIG. 4  is a cross sectional view of the end of the mold design. 
         [0025]      FIG. 5  is a longitudinal, side cross-sectional view 
         [0026]      FIG. 6  is a transverse end cross-sectional view. 
         [0027]      FIG. 7  Bottom View (female) side A and Side B are identical and is a unit when molded. Once Side A and Side B are split apart forming two whole split-face blocks, Side A and/or Side B may be split again to form half split-face blocks. XX shows the splits. 
         [0028]      FIG. 8  is a view showing the full block except the slots  100 - 106  is not shown. Under the ears, the twin bars for making the ears are in the drawing also. 
         [0029]      FIG. 9  is a cut-away view of an exploding full block.

Summary:
The invention is to make a mold that will make a square 12×8×12 block that when split makes a full 6×8×12 and a half block that will be used in a construction system based on the combined use of split-face mortar less blocks designed to lock together. There are two basic blocks, the full, and half block, with which any desirable structure can be built. The full block has protruding ears and grooves. The half block also has protruding ears and grooves. There are standard measurements between groove face in all blocks and standard measurements between ears in the full block which correspond to the measurement of the groove faces. This provides for a wide array of interlocking positions.