promotional engineer's scale and protractor
Date: circa 1960
Inventory Number: 2003-1-0209
Classification: Rule
Subject:
Maker: Lehigh Portland Cement Company (1897-present)
Cultural Region:
Dimensions:
0.1 × 18 × 3.5 cm (1/16 × 7 1/16 × 1 3/8 in.)
Material:
DescriptionPlastic six-inch white ruler with U-shaped slot along center and one semi-circular end, printed in blue.
Printed along the top edge of the face of the ruler is a scale in inches, graduated into sixteenths. Also on the face, printed along the top edge of the slot is a scale in inches, graduated into tenths. Printed along the bottom edge of the slot is a scale in tenths of a foot, graduated into tenths. Printed along the bottom edge of the face of the ruler are a three-quarters inch scale (left to right) and a three-eighths inch scale (right to left). The semicircular end of the ruler is a protractor marked for 0 to 180 degrees.
The top edge of the back of the ruler is printed with scales in inches (left to right) and half-inches (right to left). Also on the back, printed along the top edge of the slot are a quarter-inch scale (left to right) and an eighth-inch scale (right to left). Along the bottom edge of the slot is a "METRIC SCALE" in centimeters, graduated into tenths. Along the bottom edge of the back of the ruler are, on the left, inverted three-inch and sixth-inch scales (graduated into twenty-fourths and fouths, respectively) and, on the right, an eighth-inch scale.
Printed along the top edge of the face of the ruler is a scale in inches, graduated into sixteenths. Also on the face, printed along the top edge of the slot is a scale in inches, graduated into tenths. Printed along the bottom edge of the slot is a scale in tenths of a foot, graduated into tenths. Printed along the bottom edge of the face of the ruler are a three-quarters inch scale (left to right) and a three-eighths inch scale (right to left). The semicircular end of the ruler is a protractor marked for 0 to 180 degrees.
The top edge of the back of the ruler is printed with scales in inches (left to right) and half-inches (right to left). Also on the back, printed along the top edge of the slot are a quarter-inch scale (left to right) and an eighth-inch scale (right to left). Along the bottom edge of the slot is a "METRIC SCALE" in centimeters, graduated into tenths. Along the bottom edge of the back of the ruler are, on the left, inverted three-inch and sixth-inch scales (graduated into twenty-fourths and fouths, respectively) and, on the right, an eighth-inch scale.
Signedface, left center: LEHIGH PORTLAND CEMENT CO. / ALLENTOWN, PA.- CHICAGO, ILL. / COPYRIGHT APPLIED FOR
back, left center: LEHIGH PORTLAND CEMENT CO. / ALLENTOWN, PA.- CHICAGO, ILL. / COPYRIGHT APPLIED FOR
back, right center: [Lehigh Portland Cement Co. trademark]
back, left center: LEHIGH PORTLAND CEMENT CO. / ALLENTOWN, PA.- CHICAGO, ILL. / COPYRIGHT APPLIED FOR
back, right center: [Lehigh Portland Cement Co. trademark]
FunctionFor measuring angles, and to transfer lengths at fixed ratios, as in engineers' or architects' scale drawings. This ruler was distributed by the Lehigh Portland Cement Co. for promotional purposes.
ProvenancePrivate Donor, Troy, New York.