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US 4,357,757 AGranted
Perspective drawing machine
OwnerFrank R. Wurtzinventor
Life of this patent
Estimating the term…
Abstract
This invention relates to a perspective drawing machine and more particularly, to a machine which will keep track of a chosen vanishing point. This invention describes a mechanical machine in which the corrected voltage is computed on an external calculator or computer, which when found on the output potentiometer will result in the correct line pointing at the invisable vanishing point.
Claims10
An electronic perspective drawing machine comprising:
- a case having at least a top and a bottom;
- means mounting said case above a drawing surface for linear movement between one chosen position to another chosen position;
- drafting rule means pivotally mounted to said case;
- a linear gear secured to a drawing surface and extending the length or width of the drawing surface;
- a rotatable input shaft extending through bearings in the top and bottom of said case;
- a follower gear connected solidly to said input shaft, said follower gear riding on and engaging said linear gear;
- a drive gear also mounted on said input shaft between the top and bottom of said case;
- right and left vanishing point input gears mounted in said case meshing with said drive gear;
- means connected to both said right and left input gears to produce a voltage potential proportional to the change of position of said case;
- means connected to said drafting rule means to produce a voltage potential proportional to a pivotal movement of said drafting rule from zero reference potential at the eye level position;
- said case including means for lifting the drafting rule off the drawing surface;
- means to lock said case against lateral movement;
- and
- means to selectively measure said voltage potentials.
11 more elements
Dependencies are inferred from the claim text.