Patent ID: 6243959
Filing Date: 2001-06-12
Classification: G01B,G09B

Abstract:
A measuring and instructional device comprised of:(a) a base panel having a top surface and a perimeter bounded by at least one edge, said top surface having evenly spaced apart linear rulings perpendicularly disposed to said edge and defining a non-linear standard unit of measure; and(b) a top transparent sheet having a top surface and a perimeter bounded by at least one edge, said top transparent sheet surface having evenly spaced apart linear rulings perpendicularly disposed to said edge of said top transparent sheet and defining fractional increments of said non-linear standard unit of measure;wherein said transparent sheet is positionable over said base panel so that said fractional increments of said unit of measure may be aligned with said units of measure to demonstrate the relationship between said unit of measure and the fractional increments thereof.