Keuffel & Esser 4088-3 Polyphase Duplex Slide Rule
date: label: date made
content: 1913
name: label: maker
content: Keuffel & Esser Co.
notes: label: Description
content: This ten-inch duplex linear slide rule is made from boxwood faced with white celluloid and held together with L-shaped metal end pieces. On one side, the base has DF and D scales, with CF, CIF, and C scales on the slide. The bottom of the base is marked: KEUFFEL & ESSER CO. N. Y.; PAT. JUNE 5, '00 DEC. 22, '08. On the other side, there are K, A, D, and L scales on the base and S, T, and CI scales on the slide. Both pieces of the base and the slide are stamped on one end: 13. The indicator is glass in a metal frame with vertical bars on the sides.
label: Description
content: Keuffel & Esser introduced this form of slide rule in 1913 as model 4088-3 and sold it with a leather case for $7.00. This style of indicator was used only from 1913 to 1915, when K&E switched to its "frameless" glass cursor. This example thus dates to 1913–1915. Compare to MA.321778, 1981.0933.03, and MA.318480.
label: Description
content: References: Willie L. E. Keuffel, "Slide-Rule" (U.S. Patent 651,142 issued June 5, 1900) and "Slide-Rule" (U.S. Patent 907,373 issued December 22, 1908); <i>Catalogue of Keuffel & Esser Co.</i>, 34th ed. (New York, 1913), 304a; <i>Catalogue of Keuffel & Esser Co.</i>, 35th ed. (New York, 1915), 307b.
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: Rule, Calculating
setName: label: See more items in
content: Medicine and Science: Mathematics
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content: Science & Mathematics
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content: Slide Rules
creditLine: label: Credit Line
content: Gift of Keuffel & Esser Company
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: MA.318476
label: catalog number
content: 318476
label: accession number
content: 235479
objectType: label: Object Name
content: slide rule
physicalDescription: label: Physical Description
content: boxwood (overall material)
label: Physical Description
content: metal (part material)
label: Physical Description
content: celluloid (laminate material)
label: Physical Description
content: glass (cursor material)
label: Measurements
content: overall: 1 cm x 4 cm x 31 cm; 13/32 in x 1 9/16 in x 12 7/32 in