Perspectograph consisting of a flat table board with two raised edges, an L-shape mechanism (folds down for storage) with a two-pulley system, and a disc system, and a disc sight on a rod. The L-shaped piece is placed on the board, with the angle against one raised edge. At the top of the vertical rod is a pulley. At the base of the rod, to each side, is a guide wheel. At the horizontal end of the L is a horizontal pulley. A string passes completes a circuit up and back along the L. At one point on the vertical rod is a cursor with sight connected to the string, so it moves up and down as the string is moved. The horizontal piece of the L has cursor with indicator moving along a grooved section. This is also connected to the string, moving as the string is moved and thus as the cursor on the rod moves. On the other raised edge is a holder for the vertical rod with the disc sight. By looking through the disc sight at an object, and raising the sight on the vertical rod up in line, the point on the horizontal cursor will give a point. Moving the L-shaped piece right to left, and the cursor up and down, will give a series of points corresponding to the object as it is seen in perspective.
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