Wall unit with plural layers and transverse tie

Claim 1

A PREFABRICATED READY-TO-ERECT WALL UNIT COMPRISING AT LEAST THREE LAYERS, NAMELY A FACADE OR OUTER LAYER OF BUILDING STONES ARRANGED IN COURSES AND JOINED TOGETHER BY MORTAR BONDS, THE JOINTS FORMED BY THE SPACED END SURFACES IN ANY ONE COURSE BEING OFFSET RELATIVE TO THE CORRESPONDING JOINTS BETWEEN THE BUILDING STONES FORMING THE COURSES ADJACENT SAID ONE COURSE, THE BUILDING STONES IN ALTERNATE COURSES HAVING PLANAR END SURFACES EXTENDING PERPENDICULAR TO THE PLANES CONTAINING THE MAJOR FACES OF THE STONES, AN INNER OR SUPPORTING LAYER SPACED FROM SAID OUTER LAYER AND COMPRISING BUILDING STONES ARRANGED IN VERTICAL COURSES AND JOINED TOGETHER BY MORTAR BONDS INCLUDING GENERALLY STRAIGHT VERTICAL MORTAR BONDS BETWEEN SUCCESSIVE VERTICAL COURSES, AND AN INTERMEDIATE INSULATING LAYER BETWEEN SAID INNER AND OUTER LAYER, SAID OUTER LAYER HAVING AT LEAST TWO PARALLEL GROOVES OR CHANNELS THEREIN EXTENDING THE LENGTH OF SAID WALL UNIT, EACH SAID GROOVE COMPRISING RECESSES IN STONES IN EVERY ALTERNATE ONE OF SAID COURSED FORMING SAID OUTER LAYER AND SPACES BETWEEN SAID PLANAR END SURFACES OF THE STONES IN THE OTHER COURSES OF SAID OUTER LAYER, SAID RECESSES AND SPACES BEING IN VERTICAL ALIGNMENT TO FORM SAID GROOVES, ALL OF SAID THREE LAYERS BEING JOINED TOGETHER BY MEANS OF AT LEAST TWO PARALLEL CONNECTING MEMBERS, EACH CONNECTING MEMBER COMPRISING METAL REINFORCING LADDER MEANS HAVING TWO SPACED PARALLEL ELONGATED ROD MEMBERS CONNECTED BY TRANSVERSE WEB MEMBERS, ONE OF SAID ROD MEMBERS OF EACH CONNECTING MEMBER BEING FIRMLY SECURED IN ITS RESPECTIVE ONE OF SID GROOVES BY MEANS OF MORTAR, SAID TRANSVERSE WEB MEMBERS OF SAID CONNECTING MEMBERS EXTENDING THROUGH SAID INSULATING LAYER AND THE OTHER ROD MEMBER OF EACH OF THE CONNECTING MEMBERS BEING FIRMLY CONNECTED IN THE MORTAR OF THE ALIGNED VERTICAL JOINTS BETWEEN THE VERTICAL COURSES OF STONES FORMING THE INNER LAYER.