Blue print scale

Details Blue print scale Blue print scale

1983-07-20

1984-11-27

Little, Willis

Geometrical instruments

Straightedge type

Rules

G01B 302

Patent

active

044843950

ABSTRACT:
A scale is disclosed for use in making direct measurements in feet and inches on blue prints and the like drawn in various reduced scales. The scale features special inch character markings throughout the length of the scale to enable the user to directly read measurements in inches between corresponding foot measurements. The markings include 3, 6 and 9 inch subdivision and character markings with 6 inch markings for the smallest scale contemplated.

REFERENCES:
patent: 1235801 (1917-08-01), Hornig
patent: 1602490 (1926-10-01), Homan

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