Keuffel & Esser 8883 Triangular Chain Scale
date: label: date made
content: ca 1928
name: label: maker
content: Keuffel & Esser Co.
notes: label: Description
content: This 12-inch triangular boxwood rule is grooved on each side. One side has scales divided to 1/10" (numbered by ones from 0 to 12) and 1/50" (numbered by twos from 0 to 60). This side is marked: 8883 K & E SCHOOL QUALITY. The second side has scales divided to 1/20" (numbered by ones from 0 to 24) and 1/40" (numbered by twos from 0 to 48). The third side has scales divided to 1/30" (numbered by twos from 0 to 36) and 1/60" (numbered by fours from 0 to 72).
label: Description
content: William J. Ellenberger (1908–2008), who donated this object, studied electrical and mechanical engineering at The George Washington University between 1925 and 1934. He then worked for the Potomac Electric Power Company and the National Bureau of Standards. During World War II, he served in the U.S. Army Signal Corps. He was a civilian construction management engineer for the army from 1954 to 1968, when he became a private consultant.
label: Description
content: Keuffel & Esser sold model 8883 from at least 1928. Sometime after 1928, K&E made this ruler out of plastic instead of boxwood.
label: Description
content: References: "The GW Engineering Hall of Fame 2006 Inductees," http://www.weas.gwu.edu/ifaf/hall_of_fame_inductees_2006.php; "The Nature of Radio and Electricity," <i>Radio Broadcast</i> 13 (July 1928): 135.
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
label: Subject
content: Education
setName: label: See more items in
content: Medicine and Science: Mathematics
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content: Science & Mathematics
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content: Scale Rules
creditLine: label: Credit Line
content: Gift of William J. Ellenberger
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1981.0933.10
label: catalog number
content: 1981.0933.10
label: accession number
content: 1981.0933
objectType: label: Object Name
content: scale rule, triangular
label: Object Name
content: scale, triangular
physicalDescription: label: Physical Description
content: boxwood (overall material)
label: Measurements
content: overall: 2 cm x 32 cm x 2 cm; 25/32 in x 12 19/32 in x 25/32 in