Cox & Stevens/United States Army Air Forces rolling ruler
Date: circa 1942
Inventory Number: 2004-1-0378
Classification: Ruler
Subject:
Maker: Cox & Stevens Aircraft Corporation (circa 1942)
Maker: United States Army Air Forces (1941-1947)
Cultural Region:
Place of Origin:
Dimensions:
2.2 × 30.5 × 5.1 cm (7/8 × 12 × 2 in.)
Material:
Description:
Brass base with trapezoidal cross-section, into which are inserted two knurled brass wheels, one near each end. To the outside of each of the wheels are two L-shaped brass plates, bolted to the base at one end and bolted to one another at the other. Between the two wheels is a raised brass rectangle.
Printed along the top and bottom edges of the rule is a scale carrying values from 0 to 90. Below the left end of each scale is printed: "MAP SCALE / 1=500,000".
Printed along the top and bottom edges of the rule is a scale carrying values from 0 to 90. Below the left end of each scale is printed: "MAP SCALE / 1=500,000".
Signedbase of rule, top center: COX & STEVENS AIRCRAFT CORP.–#498 ;
on raised bar in center of base, center: PROPERTY – AIR FORCE / UNITED STATES ARMY
on raised bar in center of base, center: PROPERTY – AIR FORCE / UNITED STATES ARMY
Inscribedbase of rule, bottom center: INTERCEPT OFFICERS EQUIPMENT
FunctionUsed for measuring and drafting on maps with a 1:500,000 scale. By sliding the ruler on its wheels, the user can draw parallel lines any distance apart. This ruler was specifically designed for use in air navigation by the United States Army Air Forces.
Curatorial RemarksIdentical to 2003-1-0261, this instrument is slightly corroded.
ProvenancePrivate Donor, Troy, New York.
