Geometrical instruments – Miscellaneous – Light direction
Reexamination Certificate
2002-01-22
2004-09-07
Gutierrez, Diego (Department: 2859)
Geometrical instruments
Miscellaneous
Light direction
C033S018300, C033S277000
Reexamination Certificate
active
06785972
ABSTRACT:
FIELD AND BACKGROUND OF THE INVENTION
The present invention relates to a method and system for recording a point in space that is to be used as the viewing point of from which the eye, for example of an artist, will view a scene, for example a copy easel and the subject to be copied and, in particular, it concerns recording the viewing point in such a way as to allow the removal of the eye from this viewing point and return of an eye, not necessarily the same eye or the same viewer, to the same specific viewing point in order to continue viewing with the same perspective as before.
There are known copy easels that are made of transparent materials so as to allow an artist to make a copy drawing of a subject, which is positioned on the opposite side of the easel from the artist.
It is further known that, when using a copy easel, the eye must remain stationary in order for the perspective, scale, and alignment of the drawing to be maintained. Any change in the distance between the artist's eye and the subject, will effect the scale of any subsequent drawing. Any change in the angle of the line of sight, in relation to the line to infinity, will effect the perspective and alignment of any subsequent drawing.
There is further known, a sighting awning, such as referred to in U.S. Pat. No. 4,168,573, that, when attached to a copy easel, defines a sighting opening. This sighting opening, while providing a means to preserve the scale, perspective, and alignment of the drawing, proves to be an inflexible way to define the point in space where the artist's eye must be in order to effectively use the copy easel. The location of the opening is defined by the awning's designer, incorporating any limitations brought about by design or manufacturing requirements. Further, this awning restricts the user's field of vision and obscures portions of the drawing surface.
There is therefore a need for a method and system for recording the exact point in space, which is to be used as the viewing point, of from which the eye of an artist will view a copy easel and the subject to be copied, that is flexible and that allows for the comfort and personal preferences of the artist using the copy easel, and does not restrict the user's field of vision or obscure portions of the drawing surface.
SUMMARY OF THE INVENTION
The present invention is a method and system for recording a point in space that will be used as the viewing point from which the eye of an artist will view a copy easel and the subject to be copied.
According to the teachings of the present invention there is provided, that during use, the elements of the present invention are viewed monocularly, which renders visual perception two-dimensional.
According to a further teaching of the present invention, the viewing point is recorded in such a way as to allow the eye to be returned to the recorded viewing point if the position of the eye is changed.
According to a further teaching of the present invention, each reference point, of a first pair of reference points, is designated by use of at least a first graphic form.
According to a further teaching of the present invention, each reference point, of a second pair of reference points, is designated by use of graphic forms, so that the first pair of reference points is located between the second pair of reference points and the eye.
According to a further teaching of the present invention, the reference points are positioned so that, when seen from the viewing point, the at least a first graphic form designating the reference points of the first pair of reference points is aligned with a corresponding graphic form designating the reference points of the second pair of reference points.
According to a further teaching of the present invention, the eye is returned to the viewing point by changing the position of the eye until each of the at least a first graphic form designating the reference points of the first pair of reference points is aligned with a corresponding graphic form designating the reference points of the second pair of reference points.
According to a further teaching of the present invention, the designation of the first pair of reference points includes placement of the graphic forms, of the first pair of reference points, on the transparent drawing surface of a copy easel.
According to a further teaching of the present invention, the designation of the second pair of reference points includes placement of the graphic forms, of the second pair of reference points, on a surface behind the copy easel.
According to a further teaching of the present invention, the alignment of the two sets of reference points is accomplished by repositioning the second pair of reference points.
According to a further teaching of the present invention, the rotation of the second pair of reference points is restricted during transitional movement that occurs during the positioning.
According to a further teaching of the present invention, the restriction includes a mechanical element.
According to a further teaching of the present invention, the pairs of reference points are incorporated into complimentary portions of a figure, the figure having a normal appearance such that proper alignment of the pairs of reference points will further result in the proper alignment of the portions of the figure so as to make the figure appear to be complete and normal.
According to a further teaching of the present invention, the second pair of reference points is designated as end points of a line segment.
According to a further teaching of the present invention, the line segment is chosen from a group of line segments of varying lengths.
According to a further teaching of the present invention, the line segments are distinguished such that individual line segments are identifiable.
According to a further teaching of the present invention, the first set of reference points is incorporated into the figure of a clown face, consisting of a semi-circle, in which facial features have been drawn, that is printed on a card so that the straight edge of the semi-circle is coincidental to the top edge of the card, with the first pair of reference points being the end points of the straight line, and a vertical line that bisects the semi-circle is also printed.
According to a further teaching of the present invention, the second set of reference points are chosen from graduations which are incorporated into a drawing of a clown hat that is in the shape of an isosceles triangle with horizontal graduations, and a line which bisects the triangle.
According to a further teaching of the present invention, alignment is accomplished by aligning the two portions of the figure so that the hat appears to be resting directly above the clown face, and the vertical line that bisects the triangle of the hat and the vertical line that bisects the clown face, appear to be a continuous line.
According to a further teaching of the present invention, the line may appear as a straight line, or it may appear as a line which bends at an angle at the point of intersection of the hat and the clown face.
According to a further teaching of the present invention, the eye may be returned to the viewing point by use of the following steps: align the two lines which bisect the hat and the clown face respectively; align the line segment which is the top of the clown face with the corresponding reference graduation in the hat; move the eye toward or away from the easel until the hat is the same size as the clown face.
According to a further teaching of the present invention, the reference points of the second pair of reference points are designated by a device that includes a mechanism that varies the distance between two reference points, enabling the device to designate a pair of reference points that are separated by a selected distance.
According to a further teaching of the present invention, the device consists of: a card, into which two vertical slits have been cut, and onto which a triangular hat has been drawn; a transparen
Friedman Mark M.
Gonzalez Madeline
Gutierrez Diego
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