A carpenter square includes a body including a first, second, and third edges. A fence is pivoted to the first edge for movement among first, second, and third positions. In the first and second positions, the fence is normal to the body. In the third position, the fence is coplanar to the body. A hinge assembly pivots the fence to the body and includes a notch in the body, a recess in the notch, and a tab projecting from the fence and fit over the pin for reciprocating and swinging movement. The tab moves between a neutral stance, in which the tab is mis-registered with the recess and disables movement of the fence among the first, second, and third positions, and an advanced stance, in which the tab is registered with the recess and enables movement of the fence among the first, second, and third positions.

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 angle indicating instrument which, used in conjunction with a sliding T-Bevel, can indicate to users what miter saw setting to use when cutting two pieces of material for a miter joint, or for cutting one piece of material requiring a miter cut.

A roof square for marking rafters comprising a right angle triangular body with a marking blade pivotally mounted adjacent the right angle. Either side of the square adjacent the right angle is held against the stock to be marked, and the blade used to mark either a plumb cut or a foot cut. The blade retracts to allow marks to be made at a measured depth. The tool can also be used as a conventional square to make 90 and 45 degree marks.

A roof square for marking rafters comprising a right angle triangular body with a marking blade pivotally mounted adjacent the right angle. Either side of the square adjacent the right angle is held against the stock to be marked, and the blade used to mark either a plumb cut or a foot cut. The blade retracts to allow marks to be made at a measured depth. The tool can also be used as a conventional square to make 90 and 45 degree marks.

It is provided a multi-purpose analogue device (1) for tracing curves and geometric transformations comprising a first guide (3) defining a first translation axis (3a) and movable on a tracing plane along a predetermined direction perpendicular to the first axis (3a), a second guide (4) integral to the first guide (3) defining a second translation axis (4a) perpendicular to the first axis (3a), a connector (5) configured to be connected to the guides (3, 4) and comprising a third guide (50) defining a third translation axis (5a), constrained in a compliant way and roto-translatable with respect to the second guide (4), a first slider (6) constrained in a compliant way to the first guide (3), movable along the first axis (3a) and including first movement means (60) configured to allow movement of the first slider (6) in the plane along a movement direction (6a), and support means (61) configured to track a mark on the plane or to support in contact with the plane tracking means, wherein the connector (5) further comprises a fourth guide (51) defining a fourth translation axis (5b) and integrally constrained or integral, to the third guide (50) such that the translation axes (5a, 5b) are mutually perpendicular so as to allow for at least a first and second configuration in which the first slider (6) is also constrained in a compliant way respectively to the third guide (50) and translatable along the third axis (5a) or also to the fourth guide (51) and translatable along the fourth axis (5b).

It is provided a multi-purpose analogue device (1) for tracing curves and geometric transformations comprising a first guide (3) defining a first translation axis (3a) and movable on a tracing plane along a predetermined direction perpendicular to the first axis (3a), a second guide (4) integral to the first guide (3) defining a second translation axis (4a) perpendicular to the first axis (3a), a connector (5) configured to be connected to the guides (3, 4) and comprising a third guide (50) defining a third translation axis (5a), constrained in a compliant way and roto-translatable with respect to the second guide (4), a first slider (6) constrained in a compliant way to the first guide (3), movable along the first axis (3a) and including first movement means (60) configured to allow movement of the first slider (6) in the plane along a movement direction (6a), and support means (61) configured to track a mark on the plane or to support in contact with the plane tracking means, wherein the connector (5) further comprises a fourth guide (51) defining a fourth translation axis (5b) and integrally constrained or integral, to the third guide (50) such that the translation axes (5a, 5b) are mutually perpendicular so as to allow for at least a first and second configuration in which the first slider (6) is also constrained in a compliant way respectively to the third guide (50) and translatable along the third axis (5a) or also to the fourth guide (51) and translatable along the fourth axis (5b).

A carpenter tool includes a triangular body having a hypotenuse edge opposite a right corner, a first edge extending between the right corner and the hypotenuse edge, and a second edge extending between the right corner and the hypotenuse edge opposite the first edge. A fence is pivoted to the first edge for movement between first and second positions. In the first position, the fence is normal to the triangular body. In the second position, the fence is coplanar to the triangular body.

A carpenter tool includes a triangular body having a hypotenuse edge opposite a right corner, a first edge extending between the right corner and the hypotenuse edge, and a second edge extending between the right corner and the hypotenuse edge opposite the first edge. A fence is pivoted to the first edge for movement between first and second positions. In the first position, the fence is normal to the triangular body. In the second position, the fence is coplanar to the triangular body.

The present invention provides an installation device comprising a substantially planar first element having a first elongate body having a first end and a second end opposing the first end, the elongate body defining a first longitudinal axis and having a width w1 extending transverse to the first longitudinal axis, the elongate body defining a linear alignment indicator located at a midpoint of width w1 and extending along the length of the first element; and a substantially planar second element having a second elongate body having a first end and a second end opposing the first end, the elongate body defining a second longitudinal axis and having a width w2 extending transverse to the second longitudinal axis, the elongate body defining an engagement channel extending along a portion of the length of the second element, the second elongate body further comprising a plurality of position indicators along at least a portion of its length; and engagement means extending from the first element through the engagement channel and operable to secure the first and second elements to one another, wherein the installation device is moveable between a first configuration in which the first and second elements are pivotable relative to one another about the engagement means; a second configuration where the second element is slidable relative to the first element in a direction parallel to the second longitudinal axes; and a third configuration in which the first and second elements are fixed relative to one another. Also provided is a method of preparation of the aforementioned installation device and a method of use of the aforementioned installation device.