The drafting instrument of the invention (10) disclosed herein generally compromises a planar body in a quadrilateral, symmetrical form, having four perimeter sides (22,24,26 and 28), interconnected end to end to form a quadrilateral configuration and show an open space (40) in the interior of the body, and of which two pairs of sides are right angles to each other and positioned opposite and symmetrical to each other on the planar body. The instrument is provided in two primary embodiments, the first, adapted from a 45 degree triangular instrument, where side intersections of the present invention comprises a 135 degree, a 90 degree, a 45 degree and a 90 degree interior angle, respectively and the second adapted from a 30/60 degree triangular instrument, where side intersections of the present invention comprise a 150 degree, a 90 degree, a 30 degree and a 90 degree interior angle, respectively. The instrument is provided with a handle (18) that is integrally formed near the intersection of two of the perimeter sides on the planar body and extends perpendicular from the planar body, and in the preferred embodiment of the invention, the handle (18) is provided with a groove or rigid structure at its outer most edge for permitting easy indexing and pivoting with handle (18) to aid in reversing the instrument from side to side. The instrument includes a plurality of support points (38) extending outwardly from one face (16) of the instrument only, to permit pivoting and to support the instrument slightly above the surface upon which it is used.
I have discovered it is possible to find an indirect measurement if the vertex angle is given and the sides and the diameter are given. Using an instrument having the shape of an isosceles triangle it is possible to have a vertex angle and two congruent sides that correspond to the diameter of a circle or the side of a cube to find an indirect measurement to solve four classic problems, one is squaring the area of a circle, two is squaring the area of a sphere, three is finding the cube root of a sphere and cubing the volume, four is to double the volume of a cube.
The quilting tool has at least one surface defining an angle of 116.6 degrees. A transparent plate is imprinted with at least two guidelines allowing the cutting off of a portion of a fabric strip, resulting in a trapezoidal fabric pattern.
A straight edge guide having a straight edge formed along a first elongated planar member. An elevated handle is provided to hold the device in place which positions a user's hand above a blade which traverses the elongated planar member, and which transfers a user's weight through the handle as the user is in the kneeling position to hold one end of the guide in place, while the opposite end of the guide is held in place by the user's knee. An outrigger is provided which provides further friction to hold the device in place.
The quilting tool has a transparent, parallelogram plate and a first set of guidelines. The plate has at least a first major surface, a second major surface, a first side, a second side parallel to the first side, a third side and a fourth side parallel to the third side. The first set of guidelines has at least a plurality of individual guidelines imprinted on the first major surface of the plate. The individual guidelines are parallel to the first side of the plate and extend from the third side to the fourth side of the plate. The individual guidelines are spaced from the first side based on the equation (FB/NP)+(2.times.SA). FB is the finished block edge length. NP is the number of patches wanted along FB. SA is the seam allowance.
