Device for making perspective drawings

Abstract

Abstract 1. A GRAPHIC AID FOR DRAWING A PERSPECTIVE DRAWING OF A SCENE, COMPRISING: A TRANSPARENT PLANAR BASE MEMBER HAVING A VERTICALLY EXTENDING FRAME EDGE SAID BASE MEMBER HAVING A PAIR OF HORIZONTAL PARALLEL LINES THEREON, ONE LINE BEING ON EACH OF THE FRONT AND BACK SURFACE AND SAID LINES DEFINING A PLANE PERPENDICULAR TO THE PLANE OF SAID BASE MEMBER WHEREBY TO PROVIDE MEANS FOR ORIENTING SAID PLANAR BASE MEMBER NORMAL TO THE LINE OF SIGHT, SAID BASE MEMBER HAVING A CIRCULAR APERTURE THEREIN, A TRANSPARENT CIRCULAR MEMBER ROTATABLY MOUNTED IN SAID APERTURE AND HAVING AN ELONGATED SLOT ALONG A PORTION OF A DIAMETER THEREOF TO DEFINE A STRAIGHT EDGE ALIGNABLE WITH A PERSEPECTIVE LINE OF SAID SCENE, SAID ROTATABLY MOUNTED MEMBER INCLUDING MEANS ASSOCIATED THEREWITH FOR INDICATING THE RELATIVE ANGLE OF ROTATION OF SAID STRAIGHT EDGE IN THE PLANE OF SAID BASE MEMBER FROM A REFERENCE POSITION, A HORIZONTAL BUBBLE LEVEL FIXED TO SAID BASE MEMBER FOR ORIENTING SAID PARALLEL LINES HORIZONTAL, SAID BASE MEMBER FURTHER COMPRISING A RECTANGULAR FRAMING PORTION INCLUDING A PAIR OF ORTHOGONAL MEANS FOR INDICATING THE RELATIVE POSITION OF SAID PERSPECTIVE LINE WITH RESPECT TO A HORIZON, SAID TRANSPARENT CIRCULAR MEMBER HAVING A VERTICAL AND A HORIZONTAL AXIS AND BEING ROTATABLY MOUNTED WITH SAID VERTICAL AND HORIZONTAL AXES SUBSTANTIALLY DISPOSED ALONG PATHS WHICH RESPECTIVELY BISECT SAID ORTHOGONAL MEANS WHEN SAID STRAIGHT EDGE PORTION HORIZONTAL AXIS IS ALIGNED WITH ONE OF SAID PATHS, SAID HORIZONTAL AXIS BEING PARALLEL TO THE HORIZON, SAID ORTHOGONAL MEANS EACH INCLUDING A PLURALITY OF EQUISPACED INDICIA, ONE OF SAID ORTHOGONAL MEANS BEING DISPOSABLE PARALLEL TO SAID HORIZONTAL AXIS, THE OTHER OF SAID ORTHOGONAL MEANS BEING DISPOSABLE PARALLEL TO SAID VERTICAL AXIS, SAID VERTICAL DISPOSABLE ORTHOGONAL MEANS INCLUDING A PLURALITY OF SPACED APART GUIDE LINES PARALLEL TO SAID HORIZONTAL DISPOSABLE ORTHGONAL MEANS INCLUDING A PLURALITY OF SPACED APART GUIDE LINE PARALLEL TO SAID HORIZONTAL DISPOSABLE ORTHOGONAL MEANS. D R A W I N G

Inventors

• 👤 T Atkins

Bibliographic Details