Mechanical perspective drafting device
OwnerVladimir F. Tamariinventor
Life of this patent
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Abstract
Mechanical perspective drafting device, characterized by a first drafting board which is fitted with a second drafting board with a fixed support which includes a universal joint through which a long member can slide and rotate freely, the long member being fitted with a drawing device ending with a point which can come in contact with the second drafting board, the line which is connecting the universal joint and the point is passing through an imaginary three dimensional figure and this causes the point to draw a perspective projection of the figure as it is seen from the position of the universal joint, the movement of the line through the figure is assisted by a tracing guide which guides the long member.
Claims5
A mechanical perspective drafting device comprising a first drafting board, a second drafting board positioned on said first drafting board and forming an angle (.theta.) therewith;
- a training unit including a base, a vertical member on said base and extending upwardly therefrom, and a support member on said vertical member and adjustable vertically therealong;
- and a long member, said support member including a universal joint by which said long member is mounted and through which said long member can slide and rotate freely, said long member being fitted with a drawing device ending with a point which can come in contact with said second drafting board, the universal joint and the point defining a line which is passing through an imaginary three dimensional figure and this causes the point to draw a perspective projection of the figure as it is seen from the position of the universal joint, the movement of the line through the figure being assisted by said base that forms a tracing guide which guides said support member and thereby the long member and enables a manual tracing of a figure on said first board, and where a plurality of stops are present on said vertical member to limit movement of said support member vertically of said member.
Mechanical perspective drafting device characterized by a first drafting board which is fitted with a second drafting board with a fixed support which includes a universal joint through which a long member can slide and rotate freely, the long member being fitted with a drawing device ending with a point which can come in contact with the second drafting board, the line which is connecting the universal joint and the point is passing through an imaginary three dimensional figure and this causes the point to draw a perspective projection of the figure as it is seen from the position of the universal joint, the movement of the line through the figure is assisted by a tracing guide which guides the long member, said drafting device containing a second universal joint the height of which above the first drawing board can be limited by an upper lock and a lower lock at which the zero point of a vertical scale is located, said lower lock being an integral part of said scale.
Dependencies are inferred from the claim text.