Slide Chart, UNICON Universal Currency Converter
date: label: date made
content: ca 1971
name: label: maker
content: Peoria Journal Star
notes: label: Description
content: This Universal Currency Converter is a plastic-covered paper holder that contains a plastic-covered paper core. The user slides the core to match a foreign currency to the U.S. dollar, given a known exchange rate, and then reads off conversions for other amounts of U.S. currency. The table thus enables the user to avoid multiplication.
label: Description
content: The back of the Unicon contains metric to common measure conversion tables for distances, liquid volumes, weights, temperature, time zones, and “unofficial” exchange rates, as well as a 6-inch and 15 cm ruler. These rates have some historical interest for nations that no longer exist, such as West Germany and the U.S.S.R.; for currencies that have been merged, such as that of various Eurpoean nations; and for changes in exchange rates. A sheet of instructions for the Unicon also has another table of weights and measures and a list of equivalent clothing sizes. The instrument and its instructions are stored in a plastic case, meant to be carried in the pocket of travelers.
label: Description
content: A mark at the top front of the object reads: UNICON (/) UNIVERSAL CURRENCY CONVERTER (/) INSTANT * ACCURATE * ALWAYS CURRENT (/) CONVERTS ANY FOREIGN CURRENCY. A mark on the bottom front reads: Patent Pending Peoria Journal Star, Inc. 1971.
label: Description
content: This example of the Unicon was given to the Museum by one of its inventors, David J. Schlink (1931–2010). Schlink and Walter K. Schwarz received U.S.Patent No. 3,680,775 on 1 August 1972 for the Unicon. They assigned the patent to Schlink’s employer, The Peoria Journal Star, Inc., of Peoria, Illinois. Under the name PJS Enterprises, the newspaper manufactured and sold the Unicon for $3.95 retail. Distribution soon was taken over by Unicon Enterprises of Peoria, which sold a later version of the instrument, the Unicon II, as late as 1988. By this time, foreign travelers also were advised to take along electronic calculators for currency conversion.
label: Description
content: Schlink wrote two books on currency conversion, <I>Money Sense Overseas</I> (or,<I>Unicon I</I>), which sold in 1984 for $4.50 (ISBN 0912327006) and <I>Unicon II</I>, which sold in 1983 for $4.95 (ISBN 0912327014). It is not clear why <I>Unicon II</I> was copyrighted before <I>Unicon I</I>.
label: Description
content: References:
label: Description
content: Accession file.
label: Description
content: W. K. Schwarz and D. J. Schlink, “Calculating Device,” U.S. Patent 3,680,775, August 1, 1972.
label: Description
content: W. K. Schwarz and D. J. Schlink, “Calculating Device,” U.S. Patent 3,754,702, August 28, 1973.
label: Description
content: W. K. Schwarz and D. J. Schlink, “Conversion Calculator,” U.S. Design Patent 231,796, June 11, 1974.
label: Description
content: “Travel Log,” <I>Boston Globe</I>, January 14, 1973, p. A25.
label: Description
content: Tom Grimm, “How to Avoid Currency Problems When Overseas,” <I>Chicago Tribune</I>, June 25, 1975, p. B14.
label: Description
content: Betty Lukas, “Purse Is the Traveler’s Best Friend,” <I>Los Angeles Times</I>, September 8, 1985, p. G19.
label: Description
content: Jonathan Storm, “Adventurous Tours for Women over 30,” <I>Philadelphia Inquirer</I>, May 29, 1988.
label: Description
content: “David J. Schlink,” <I>Peoria Journal Star</I>, September 24, 2010.
label: Location
content: Currently not on view
place: label: place made
content: United States: Illinois, Peoria
topic: label: Subject
content: Mathematics
label: Subject
content: Numismatics
setName: label: See more items in
content: Medicine and Science: Mathematics
label: See more items in
content: Mathematical Charts and Tables
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content: Science & Mathematics
creditLine: label: Credit Line
content: Gift of David J. Schlink
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: MA.333847
label: catalog number
content: 333847
label: accession number
content: 303772
objectType: label: Object Name
content: mathematical table
physicalDescription: label: Physical Description
content: plastic (overall material)
label: Physical Description
content: paper (overall material)
label: Measurements
content: overall: .4 cm x 16.6 cm x 8 cm; 5/32 in x 6 17/32 in x 3 5/32 in