Geometrical instruments – Straightedge type – Rules
Patent
1995-08-03
1997-07-15
Bennett, G. Bradley
Geometrical instruments
Straightedge type
Rules
33 1M, 33 1PT, 33449, 33483, B43L 704
Patent
active
056471351
ABSTRACT:
A self-contained drafting instrument adapted for rapid measurement of diagrams or drawings on a surface. The instrument utilizes an internal movement detection mechanism, an electronics processing system, and a display screen capable of graphical representation. The movement detection mechanism measures both orthogonal components of movement and the display screen provides a scale that electronically scrolls as the instrument moves or by manually pressing a key on a keyboard. The drafting instrument can be constructed in a number of orientations including a ruler, drafting triangle, protractor, or T-square.
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Fuentes Alejandro
Gomez Arturo
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