A jig for clamping that includes two or more clamping aid tools for use and mounting with various common tools, including a carpenter, framing and speed square, and various straight edges for easily and accurately positioning various objects, either flat and/or round, magnetic or not. The clamping aids can clamp to round pipes at correct angles while being fitted, secured and/or welded together.

A jig for clamping that includes two or more clamping aid tools for use and mounting with various common tools, including a carpenter, framing and speed square, and various straight edges for easily and accurately positioning various objects, either flat and/or round, magnetic or not. The clamping aids can clamp to round pipes at correct angles while being fitted, secured and/or welded together.

In one embodiment, an artist tool for capturing relationships between features comprises: a first transparent blade; and a second transparent blade, the first and the second transparent blade each having a length extending from a first to a second distal end, and a width extending from a first to a second edge, each having a fastener hole offset from a center point; a fastener that penetrates through the fastener holes of the first and second blades such that the first blade is rotatably coupled to the second blade by the fastener. At least one of the first or second blades comprise a first linear slit that extends along a center axis between the first distal end and the fastener hole. Either blade may include a second linear slit that extends between the second distal end and the fastener hole. The center axis passing through a center of the fastening hole.

The line-marking tool attaches to a pad of paper. The line-marking tool comprises an anchored straight edge, a rotating straight edge, and a slewing bearing. The slewing bearing attaches the rotating straight edge to the anchored straight edge. The anchored straight edge attaches to the pad of paper such that the position of the anchored straight edge relative to the top sheet of the pad of paper is fixed. The anchored straight edge and the rotating straight edge are used to draw straight lines on the top sheet. The slewing bearing adjusts the cant of the rotating straight edge relative to the anchored straight edge such that a cant is formed between a line drawn using the rotating straight edge and a line drawn using the anchored straight edge. The slewing bearing is calibrated to form a precise angle of cant on the top sheet.

The line-marking tool attaches to a pad of paper. The line-marking tool comprises an anchored straight edge, a rotating straight edge, and a slewing bearing. The slewing bearing attaches the rotating straight edge to the anchored straight edge. The anchored straight edge attaches to the pad of paper such that the position of the anchored straight edge relative to the top sheet of the pad of paper is fixed. The anchored straight edge and the rotating straight edge are used to draw straight lines on the top sheet. The slewing bearing adjusts the cant of the rotating straight edge relative to the anchored straight edge such that a cant is formed between a line drawn using the rotating straight edge and a line drawn using the anchored straight edge. The slewing bearing is calibrated to form a precise angle of cant on the top sheet.

One or more clamping aid tools for mounting to various squares and straight edges, including carpenter squares, framing squares, speed squares or the like, and various straight edges and rulers for easily and accurately positioning various objects, either flat and/or round, magnetic or not. The clamping aid tools can secure these squares and straight edges to various objects while they are being fitted, secured and/or welded together.

One or more clamping aid tools for mounting to various squares and straight edges, including carpenter squares, framing squares, speed squares or the like, and various straight edges and rulers for easily and accurately positioning various objects, either flat and/or round, magnetic or not. The clamping aid tools can secure these squares and straight edges to various objects while they are being fitted, secured and/or welded together.

An adjustable carpenters square has a handle and first and second blades extending from the handle in a substantially perpendicular relationship. The first blade is fixed in the handle and the second blade is pivotally mounted on the handle to enable it to be adjustable with respect to the fixed first blade to ensure that it is at a true 90 to the first blade. A cam mechanism is mounted in the handle and engageable with the second blade to pivot the second blade with respect to the first blade. The cam mechanism includes a one-piece cam having a cylindrical base and a cam portion offset therefrom. This cam mechanism enables the method of the present invention of adjusting the perpendicular relationship between the two blades to be achieved with a high degree of accuracy.

An adjustable carpenters square has a handle and first and second blades extending from the handle in a substantially perpendicular relationship. The first blade is fixed in the handle and the second blade is pivotally mounted on the handle to enable it to be adjustable with respect to the fixed first blade to ensure that it is at a true 90 to the first blade. A cam mechanism is mounted in the handle and engageable with the second blade to pivot the second blade with respect to the first blade. The cam mechanism includes a one-piece cam having a cylindrical base and a cam portion offset therefrom. This cam mechanism enables the method of the present invention of adjusting the perpendicular relationship between the two blades to be achieved with a high degree of accuracy.

An instrument for establishing orientation of a pelvic prosthesis comprises a hub, a first arm attached to and extending from the hub, and a second arm attached to and extending from the hub. The first and second arms define a nominal plane of the apparatus, and may extend from the hub at an angle relative to each other. Distances between the first and second legs and between the first and third legs are adjustable. The first, second, and third legs have tips, and the tips of the first, second, and third legs define a plane having a predefined geometric relationship to the nominal plane of the apparatus.