Pamphlet, Trigonometry Tables and Involute functions
date: label: date made
content: 1954
name: label: maker
content: Illinois Tool Works Inc.
notes: label: Description
content: In the mid-twentieth century, American tool manufacturers sometimes distributed trigonometry tables that included advertisements for their products. This small paper pamphlet includes definitions of the sine, cosine, tangent, cotangent, secant and cosecant as well as formulas for finding the length of sides for right-angled and oblique triangles when different angles and sides are known. It then gives tables to five places of values of the six trigonometric functions mentioned, as well as a table of decimal equivalents. In addition to this material, the pamphlet has a section on involute function that includes tables and formulas for spur and helical gears.
label: Description
content: Also shown are precision metal cutting tools manufactured by Illinois Tool Works, which billed itself as “Headquarters for Engineered Cutting Tools.”
label: Description
content: The pamphlet was owned by machinist and museum specialist George A. Norton. The copyright date is 1954.
label: Description
content: Compare 1986.3078.01.
label: Location
content: Currently not on view
place: label: place made
content: United States: Illinois, Chicago
topic: label: Subject
content: Mathematics
setName: label: See more items in
content: Medicine and Science: Mathematics
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content: Trigonometry
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content: Science & Mathematics
creditLine: label: Credit Line
content: Gift of George A. Norton
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1986.3078.02
label: nonaccession number
content: 1986.3078
label: catalog number
content: 1986.3078.02
objectType: label: Object Name
content: Pamphlet
physicalDescription: label: Physical Description
content: paper (overall material)
label: Measurements
content: overall: .5 cm x 7.8 cm x 16.5 cm; 3/16 in x 3 1/16 in x 6 1/2 in