Wall repair device

Claim 1

APPARATUS FOR REPAIRING A BREAK IN WALL AND TO SUPPORT PATCHING PLASTER THEREIN, SAID APPARATUS COMPRISING AN OPEN-ENDED GENERALLY BOX-LIKE MEMBER HAVING ONE SIDE THEREOF LONGER THAN ANOTHER SIDE; AN EXPANDED METAL BASE ON SAID BOX-LIKE MEMBER TO HOLD THE PATCHING PLASTER AND PERMITTING PATCHING PLASTER TO KEY IN SAID EXPANDED METAL BASE; SIDE WALLS SERRATED TO POINTS, SAID SIDE WALLS PERMITTING PATCHING PLASTER TO EXTRUDE BETWEEN SAID POINTS AND THEREBY FORMING PLASTER KEYS AGAINST THE REAR SURFACE OF SAID WALL; AND EXPANSIBLE HOLDING MEANS FOR SAID BOX-LIKE MEMBER HAVING A FIRST LEG INSERTABLE THROUGH SAID EXPANDED METAL BASE AND EXTENDING AT AN ANGLE, SAID FIRST LEG ENGAGING SAID EXPANDED METAL BASE ACROSS THE REAR SURFACE THEREOF AND HAVING A SECOND LEG EXTENDING OUTWARDLY FROM SAID BASE BEYOND THE POINTS OF SAID SIDEWALLS AND LATERALLY THEREOF THEREBY ADAPTED TO EXTEND THROUGH SAID BREAK AND ACROSS THE EDGE OF THE BREAK AND ACROSS THE FRONT SURFACE OF SAID WALL, SAID LEGS OF SAID HOLDING MEANS BEING CAPABLE OF BEING EXPANDED FROM THEIR FREE STATE WHEN DISPOSED, AS AFORESAID, TO BIAS THE SERRATED EDGES INTO ENGAGEMENT WITH THE REAR SURFACE OF SAID WALL.