Door mortising template and holder

Claim 1

A MORTISING DEVICE, COMPRISING: (A) A FRAME STRUCTURE ADAPTED TO BE APPLIED TO THE MARGINAL EDGE PORTION OF A DOOR, INCLUDING (A) A FIRST PLATE AND A SECOND PLATE IN RIGHT ANGLED RELATION COOPERATING TO POSITION THE FRAME STRUCTURE IN AN OPERATIVE POSITION WITH THE PLATES RESPECTIVELY ENGAGING THE EDGE FACE OF THE DOOR AND THE ADJACENT SIDE FACE OF THE DOOR, ONE OF SAID PLATES HAVING AN OVERHANGING SIDE MARGIN EXTENDING OUTWARDLY OF THE PLANE OF THE OTHER PLATE, AND AN OPENING HAVING PORTIONS EXTENDING ON OPPOSITE SIDES OF SAID PLANE; (B) MARGINAL EDGE PORTIONS PROJECTING FROM THE OUTER SURFACE OF SAID ONE OF SAID PLATES TO FORM A TEMPLATE RECEIVING RECESS, THE OUTER SURFACES OF SAID EDGE PORTIONS LYING IN A PLANE PARALLEL TO THE PLANE OF THE DOOR ENGAGING INNER SURFACE OF THE PLATE FOR GUIDING ENGAGEMENT WITH A ROUTER FACE-PLATE; (C) A TEMPLATE POSITIONED IN SAID RECESS HAVING A ROUTER TOOL GUIDING OPENING ARRANGED TO BE POSITIONED OVER THE PLATE OPENING, AND THE PORTIONS OF THE OPENINGS OUTWARDLY OF THE OTHER OF SAID PLATES PROVIDING A STARTING POSITION IN WHICH THE TOOL MAY OPERATE FREELY WITHOUT CONTACT WITH THE ASSOCIATED DOOR; AND (D) CLAMPING MEANS CARRIED BY SAID PLATES FOR ATTACHING THE FRAME STRUCTURE IN AN OPERATIVE POSITION ON THE DOOR.