Frangible masonry unit

Claim 1

A FULL WALL WIDTH MASONRY BLOCK ADAPTED TO ENCLOSE VERTICAL REINFORCEMENTS, ELECTRICAL CONDUITS, PIPES AND CONSTRUCTIONAL MEMBERS WITHOUT CUTTING THE BLOCK DURING INSTALLATION AND ADAPTED TO BE SEPARATED BY A SHARP BLOW INTO HALF PORTIONS OF CONVENTIONAL BRICK SIZE; THE BLOCK COMPRISING A MASONRY BODY GENERALLY U-SHAPED IN HORIZONTAL SECTION HAVING TOP AND BOTTOM SURFACES AND RECTANGULARLY ARRANGED OPPOSITE SIDES AND END SURFACES; THE U-SHAPE BEING DEFINED BY A RECESS, HAVING AN OPEN END AND AN INNER END, FORMED IN THE BODY EXTENDING FROM ONE END SURFACE TOWARD THE OTHER END SURFACE ALONG AN AXIS MIDWAY BETWEEN SAID PARALLEL WITH THE BLOCK SAID SURFACES; THE OPEN END OF THE RECESS DIVIDING SAID ONE END SURFACE INTO FIRST AND SECOND END PORTIONS SPACED APART BY SAID OPEN RECESS END; THE RECESS HAVING OPPOSED SURFACES LOCATED ON EITHER SIDE OF SAID AXIS AND PARALLEL WITH EACH OTHER AND WITH SAID AXIS; THE BODY HAVING A FLANGE EXTENDING BETWEEN THE TOP AND BOTTOM BODY SURFACES AND DEFINING PART OF SAID FIRST END PORTION, THEREBY PROVIDING A REDUCED OPENING FOR THE OPEN RECESS END BETWEEN SAID SPACED FIRST AND SECOND END PORTIONS; THE INNER END OF SAID RECESS HAVING SURFACE PORTIONS TAPERING FROM SAID OPPOSED PARALLEL SURFACES TOWARD EACH OTHER AND TOWARD THE OTHER END SURFACE; THERE BEING A SHALLOW GROOVE FORMED INWARD IN THE BODY FROM SAID OTHER END SURFACE EXTENDING BETWEEN THE TOP AND BOTTOM BODY SURFACES ALONG SAID AXIS AND TOWARD SAID RECESS; SAID SHALLLOW GROOVE DIVIDING SAID OTHER END SURFACE INTO THIRD AND FOURTH END PORTIONS RESPECTIVELY OPPOSITE DEFINED IN PART BY SAID FLANGE HAVING A FIRST END PORTION DEFINED IN PART BY SAID FLANGE HAVING A WIDTH EQUAL TO THAT OF THE THIRD END PORTION; AND THE RECESS HAVING A WIDTH BETWEEN SAID OPPOSED PARALLEL SURFACES GREATER THAN THE WIDTH OF THE SHALLOW GROOVE; WHEREBY WHEN THE BODY IS SEVERED INTO HALF PORTIONS BY FRACTURE BETWEEN THE TOP AND BOTTOM SURFACES AND BETWEEN THE GROOVE AND RECESS, ONE OF THE HALF PORTIONS IS DEFINED BY A SIDE SURFACE AND SAID FIRST AND THIRD END PORTIONS SIMULATING THE SIDE AND TWO ENDS OF A CONVENTIONAL BRICK.