Guedon Pocket Simplex Slide Rule
date: label: date made
content: 1940s
name: label: maker
content: Guedon
notes: label: Description
content: This one-sided, five-inch steel linear slide rule is painted white. The scales are not lettered, but on the base they are equivalent to A and D scales and on the slide they are the equivalent of B, CI, and C scales. The bottom of the base is marked: GUEDON. CAMDEN. NEW JERSEY. It is also marked: PATENT PENDING and MADE IN U. S. A.
label: Description
content: The base has grooves along the top and bottom of both the front and the back. The front grooves hold a celluloid indicator with concave curves on both sides. The back grooves hold a piece almost as wide as the base that serves as a support for the slide. The slide is a narrower metal piece, hooked to the support at both ends. The front of the support has a table for converting fractions to decimals; on the back are scales of 12.5 cm, divided to millimeters, and of 5 inches, divided to 32nds of an inch. The rule fits in a cardboard sleeve coated with brown synthetic leather.
label: Description
content: According to a letter in the Keuffel & Esser collection at the MIT Museum, the Guedon company was making rules of this type in 1943 and selling them wholesale for 50 cents.
label: Description
content: Reference: International Slide Rule Museum, "Miscellaneous USA," http://sliderulemuseum.com/MiscUSA.htm.
label: Location
content: Currently not on view
place: label: place made
content: United States: New Jersey, Camden
topic: label: Subject
content: Mathematics
label: Subject
content: Rule, Calculating
setName: label: See more items in
content: Medicine and Science: Mathematics
label: See more items in
content: Science & Mathematics
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content: Slide Rules
creditLine: label: Credit Line
content: Gift of David G. D. Hecht
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 2009.3008.03
label: nonaccession number
content: 2009.3008
label: catalog number
content: 2009.3008.03
objectType: label: Object Name
content: slide rule
physicalDescription: label: Physical Description
content: metal (overall material)
label: Physical Description
content: plastic (cursor material)
label: Physical Description
content: paper (case material)
label: Measurements
content: overall: 5.7 cm x 16.3 cm x .4 cm; 2 1/4 in x 6 13/32 in x 5/32 in