Concise Model 28 Circular Slide Rule
date: label: date made
content: 1959-1966
name: label: distributor
content: Pan American Airlines
label: maker
content: Concise
notes: label: Description
content: This white plastic circular slide rule was made by Concise Company, Ltd., of Tokyo, Japan, for Pan American Airlines. The base has a D scale, and there are C, CI, A, and K scales on a disc that rotates atop the base. A clear plastic indicator is pivoted at the center. The center of the rotating disc is marked: CIRCULAR CONCISE SLIDE RULE (/) NO. 28 (/) MADE IN JAPAN.
label: Description
content: The back of the object is light blue with a white logo of a globe and is marked: WORLD'S LARGEST AIR CARGO CARRIER (/) PAN AM (/) WORLD'S MOST EXPERIENCED AIRLINE. The instrument was received with a clear plastic sleeve, a black vinyl case, and an undated instruction manual. The case is marked: Concise (/) No. 28. In 1963, the rule was advertised as "a revolutionary new design concept."
label: Description
content: Concise has specialized in circular slide rules, particularly for promotional distribution by other companies, since its founding in 1949. The company operated under the name Concise Co., Ltd., which appears on the instruction manual, from 1959 to 1966, hence the rough date assigned this slide rule. The donor, industrial engineer Richard Freeze, reported that he received the item as a promotional item distributed at a conference. For other Pan American promotional slide rules, see 1996.3029.01 and 1996.3029.02. For other slide rules by Concise, see 1985.0636.02, 1996.0141.01, and 2006.0173.01.
label: Description
content: References: "Concise Corporate History," http://www.concise.co.jp/eng0731/history.html; Peter M. Hopp, <i>Slide Rules: Their History, Models, and Makers</i> (Mendham, N.J.: Astragal Press, 1999), 105; advertisement, <i>Civil Engineering</i> 33 (February 1963): 84; accession file.
label: Location
content: Currently not on view
place: label: place made
content: Japan: Tōkyō, Tokyo
topic: label: Subject
content: Rule, Calculating
label: Subject
content: Promotional Item
label: Subject
content: Mathematics
setName: label: See more items in
content: Medicine and Science: Mathematics
label: See more items in
content: Science & Mathematics
label: See more items in
content: Slide Rules
creditLine: label: Credit Line
content: Gift of Richard Freeze
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 2003.0012.01
label: accession number
content: 2003.0012
label: catalog number
content: 2003.0012.01
objectType: label: Object Name
content: calculating rule
label: Object Name
content: slide rule
physicalDescription: label: Physical Description
content: plastic (overall material)
label: Physical Description
content: paper (part material)
label: Measurements
content: in case: 9.3 cm x 9.1 cm; 3 21/32 in x 3 19/32 in
label: Measurements
content: overall: 8.2 cm; 3 1/4 in