Anchorage bolt and block for concrete structures

Claim 1

AN ANCHORAGE AND FASTENING MEANS FOR USE WITH CONCRETE AND LIKE STRUCTURES, COMPRISING IN COMBINATION: (A) A BLOCK ADAPTED TO BE IMBEDDED IN CONCRETE WITH ONE FACE THEREOF EXPOSED, (B) SAID BLOCK HAVING A RECESS WITH OPPOSITELY DISPOSED UNDERCUT WALLS CONSTITUTING A T-SLOT, WHICH TSLOT OPENS AT THE SAID FACE, SAID RECESS HAVING A PAIR OF STRAIGHT, OPPOSITE WALL SURFACES, (C) AN ANCHOR BOLT HAVING A SHANK AND A FLATTED AND ELONGATE SHAPED HEAD, THE LATTER BEING RECEIVED IN SAID T-SLOT WITH THE SHANK PROTRUDING FROM THE SAID EXPOSED FACE OF THE BLOCK, (D) SAID HEAD HAVING A SIZE AND ELONGATE SHAPE WHICH PREVENTS IT FROM BEING COMPLETELY TURNED WHEN IN THE SLOT BUT ENABLING A PARTIAL TURNING TO BE EFFECTED LOCATING THE OUTERMOST PORTIONS OF THE HEAD IN THE UNDERCUT PORTIONS OF THE WALLS TO PREVENT PULL-OUT OF THE BOLT FROM THE BLOCK, (E) SAID HEAD PORTION OF THE BOLT HAVING OPPOSITELY DISPOSED END FACES COMPRISING A PAIR OF CURVED ECCENTRIC CAM SURFACES, SAID CAM SURFACES COOPERATING WITH THE STRAIGHT OPPOSITE WALL SURFACES OF THE BLOCK RECESS TO HOLD THE BOLT, THE PORTIONS OF THE CAM SURFACES WHICH ENGAGE THE SAID STRAIGHT OPPOSITE WALL SURFACES, TOGETHER WITH THE AXIS OF THE BOLT BEING ALL IN ALIGNMENT ALONG A LINE WHICH IS NORMAL TO THE SAID WALL SURFACES FOR THE PURPOSE OF HOLDING THE BOLT FIRMLY WEDGED AGAINST LATERAL MOVEMENT AND FIXEDLY SUPPORTED IN THE SLOT IN VARIOUS LOCATIONS SOLELY IN RESPONSE TO TO THE BOLT BEING SLIGHTLY TURNED.