Universal parallel ruler for three-dimensional drawing

A universal parallel ruler including a protractor disc and scales attached thereto for use in three-dimensional drawing, comprising:

• a plurality of preset stopper means for angularly adjusting said scales relative to said protractor disc, one of said preset stopper means corresponding to at least one of the basic axes of said three-dimensional drawing, each of said preset stopper means having a receiving portion;
• and
• scale supporting member means for positively engaging said preset stopper means for angularly setting said scales to align one of said scales with one of the basic three axes of said three-dimensional drawing,
• said scale supporting member means including an engaging portion selectively secured to said receiving portion thereby permitting said preset stopper means to be removably engaged to said scale supporting member means.

A univeral parallel ruler including at least one scale for use in three-dimensional drawing, comprising:

• at least one preset stopper means corresponding to at least one of the basic three axes of a three-dimensional drawing, said at least one preset stopper means for angularly adjusting said at least one scale relative to said protractor disc;
• a scale supporting member means for positively engaging said preset stopper means for adjustably setting the angle of said at least one scale to align said scale with one of the basic three axes of said three-dimensional drawing;
• and
• a protractor disc including a guide groove and a member fixed at a desired position along said groove;
• said preset stopper means being stationarily mounted on said guide member.

A universal parallel ruler including a protractor disc, a head and at least one scale for use in three-dimensional drawing, comprising:

• stationary stopper means for locking said at least one scale to one of the basic three axes of said three-dimensional drawing;
• two angularly adjustable preset stopper means corresponding to the remaining two axes of said three-dimensional drawing for angularly adjusting said at least one scale, said two angularly adjustable preset stopper means being mounted on the head;
• and
• two movable guide members selectively fixed at desired positions relative to said protractor disc;
• said two angularly adjustable preset stopper means corresponding to the remaining two axes of said three-dimensional drawing being mounted on said two guide member means;
• said two angularly adjustable preset stopper means being located on the same circular arc with respect to said stationary stopper means.

A universal parallel ruler for use in three-dimensional drawing, comprising:

• a head shaft;
• a protractor concentrically located around said shaft, said protractor having a plurality of preset stoppers attached thereto and adapted to be set to the basic three axes of said three-dimensional drawing, at least one of said preset stoppers being rotatable about said head shaft;
• and
• a scale supporting member having a locking piece attached thereto, said scale supporting member rotating with said head shaft thereby permitting said scale supporting member to be brought into engaging relationship with one of said plurality of preset stoppers.