Tool for carpentry calipers for curved frames with joined end corners

A method for making a frame having at least two adjacent portions, each of a distinct curvature, wherein a joint between said at least two portions on the frame is rounded, the method comprising the steps of:

• providing a carpentry caliper for outlining at least one of said at least two portions on the frame, the carpentry caliper comprising a circular flange, a pin extending vertically from the circular flange, a revolving unit pivotally secured to the pin spaced from the circular flange, and a pair of parallel first rods slidably secured to the revolving unit, each of said first rods having a front end;
• providing and movably securing an accessory unit to the carpentry caliper for outlining the joint between said at least two portions on the frame, the accessory unit comprising a rod holding unit secured to the front ends of the first rods on the carpentry caliper and extending a desired distance from the circular flange of the carpentry caliper, a pair of parallel second rods slidably secured to the rod holding unit, and a sliding block slidably secured to the pair of the second rods, the rod holding unit including means providing rotation of the second rods with respect to the first rods;
• and
• securing a cutting means to the accessory unit for cutting out said at least two portions and the joint therebetween, the cutter means being secured to the front ends of the second rods;
• securing the circular flange of the carpentry caliper to a workpiece and extending the first rods, thereby providing a distance between the revolving unit and the front ends of the first rods corresponding to a desired radius of the said at least one of said at least two portions of the frame, and
• cutting out said at least one of said at least two portions of the frame;
• extending and fixing the rod holding unit secured to the front ends of the first rods on the carpentry caliper at a desired distance from the circular flange of the carpentry caliper, and engaging the sliding block to the rod holding unit, thereby setting a desired radius of the joint to be cut off, and
• cutting out said joint.