Section Liner
date: label: date made
content: ca 1900
notes: label: Description
content: A section liner is an instrument for drawing closely spaced parallel lines, such as appeared in cross-hatching. In this example, two metal crossbars attached near the base of a wooden triangle hold a rectangular wooden inset. The separation between the bottom of the rectangle and the adjacent, parallel, part of the triangle is controlled by a metal cam.
label: Description
content: This instrument, which combined a section liner with a triangle, is similar but not identical to one invented by Oscar F. Hill of Lowell, Massachusetts, in 1894 (in Hill’s instrument, the triangle is only a skeleton). Hill’s section liner was sold by Keuffel & Esser Company.
label: Description
content: The instrument has no maker’s mark. A mark penciled on the cam reads: 1/16.
label: Description
content: References:
label: Description
content: Oscar F. Hill, “Draftsman’s Instrument,” U.S. Patent 531,186, December 18, 1894.
label: Description
content: Keuffel & Esser Company, <I>Catalog</I>, 1909, pp.162-163.
label: Description
content: For a discussion of section liners, see the website www.mathsinstruments.me.uk, accessed July 13, 2017.
label: Location
content: Currently not on view
topic: label: Subject
content: Mathematics
setName: label: See more items in
content: Medicine and Science: Mathematics
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content: Single Drawing Instruments
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content: Science & Mathematics
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1990.0316.05
label: catalog number
content: 1990.0316.05
label: accession number
content: 1990.0316
objectType: label: Object Name
content: section liner
physicalDescription: label: Physical Description
content: wood (overall material)
label: Physical Description
content: metal (cam, attachments material)
label: Measurements
content: overall: .8 cm x 7.7 cm x 7 cm; 5/16 in x 3 1/32 in x 2 3/4 in