Universal parallel ruler for three-dimensional drawing

Details Universal parallel ruler for three-dimensional drawing Universal parallel ruler for three-dimensional drawing

1978-12-19

1980-06-10

Haroian, Harry N.

Geometrical instruments

Straightedge type

Base attached

B43L 1314

Patent

active

042065518

ABSTRACT:
A Universal parallel ruler for use with three-dimensional drawings is disclosed which utilizes a pair of perpendicular scales individually secured to a mounting plate which is connected to a head portion. The head portion contains a plurality of preset stoppers which are angularly adjustable relative to the angular position of the respective axes of the three-dimensional drawing. Once each of the preset stoppers are angularly adjusted to their proper angular positions, clamp members secure each of the preset stoppers in position within the head portion. A locking piece is then utilized to disengage the head portion from one preset stopper allowing the head portion to be rotated to another preset stopper. Releasing the locking piece re-engages the head portion to another preset stopper and thus in alignment with another axis of the three-dimensional drawing.

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