Keuffel & Esser 1621P Architects' Triangular Scale
date: label: date made
content: 1943–1962
name: label: maker
content: Keuffel & Esser Co.
notes: label: Description
content: This 12-inch triangular boxwood rule has indentations along each side, and the sides are faced with white celluloid. On one side, one edge has a scale divided to 1/16" and numbered by ones from 0 to 12. The other edge has scales for 3/32" and 3/16" to the foot. Between these scales is a scale divided to 3/32", numbered from left to right by fours from 0 to 124, and numbered from right to left by twos from 0 to 62. This side is marked: 1621P KEUFFEL & ESSER CO. N.Y. PARAGON.
label: Description
content: One edge of the second side has scales for 1" and 1/2" to the foot. Between these scales is a scale divided to 1/2", numbered from left to right by ones from 0 to 10 and from right to left by twos from 0 to 20. The other edge has scales fro 1/8" and 1/4" to the foot. Between these scales is a scale divided to 1/8", numbered from left to right by fours from 0 to 92 and from right to left by twos from 0 to 46.
label: Description
content: One edge of the third side has scales for 3/4" and 3/8" to the foot. Between these scales is a scale divided to 3/8", numbered from left to right by ones from 0 to 14 and from right to left by twos from 0 to 28. The other edge has scales for 1-1/2" and 3" to the foot. Between these scales is a scale divided to 1-1/2", numbered from left to right by twos from 0 to 4 and from right to left by ones from 0 to 2. This side is marked: RHW.
label: Description
content: A triangular green cardboard box has masking tape at both ends. A red and green paper label is marked: K + E PARAGON (/) ARCHITECTS' TRIANGULAR SCALE (/) 1621P 12 IN. (/) MADE IN U.S.A. TM'S REG. U.S. PAT. OFF.
label: Description
content: Keuffel & Esser began to offer model 1621P between 1901 and 1909, when it cost $2.50. The firm introduced the logo shown on the box in 1943. In 1944, this instrument sold for $7.50. The company changed its model numbers in 1962. According to the donor, the instrument was used by her husband, the electrical engineer Robert H. Wieler (1923–1993).
label: Description
content: References: <i>Catalogue and Price List of Keuffel & Esser Co.</i>, 33rd ed. (New York, 1909), 190; <i>Catalogue and Price List of Keuffel & Esser Co.</i>, 40th ed. (New York, 1944), 138.
label: Location
content: Currently not on view
place: label: place made
content: United States: New York, New York City
topic: label: Subject
content: Mathematics
label: Subject
content: Drafting, Engineering
setName: label: See more items in
content: Medicine and Science: Mathematics
label: See more items in
content: Science & Mathematics
label: See more items in
content: Scale Rules
creditLine: label: Credit Line
content: Gift of Norma P. Wieler
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1998.0032.04
label: catalog number
content: 1998.0032.04
label: accession number
content: 1998.0032
objectType: label: Object Name
content: scale rule, triangular
label: Object Name
content: triangular rule
physicalDescription: label: Physical Description
content: boxwood (overall material)
label: Physical Description
content: plastic (overall material)
label: Physical Description
content: paper (overall material)
label: Measurements
content: overall: 2.7 cm x 32.4 cm x 3 cm; 1 1/16 in x 12 3/4 in x 1 3/16 in