Rockwell 61R Handheld Electronic Calculator
date: label: date made
content: 1974-1975
name: label: maker
content: Rockwell International
notes: label: Description
content: This handheld electronic calculator was described by its maker as an “advanced slide rule.” It has an array of twenty-five sloping plastic keys. These may either perform the function indicated on the key or, if the F key is pressed first, perform a “secondary function” which is indicated above the key on the keyboard. With this combination of keys, the calculator performs not only the four arithmetic functions but computes natural and common logarithms and anti-logarithms, trigonometric and inverse trigonometric functions, square roots, roots and powers for any real numbers, and reciprocals. The number pi may be recalled and there are five memory keys. An on/off switch and a degree/radian switch are behind the keyboard. Behind them is an eight-digit fluorescent display with a sign indicator. A mark behind it reads: Rockwell. A mark along the front edge reads: ADVANCED SLIDE RULE 61R.
label: Description
content: According to the instructions for the calculator, it has a sealed battery pack that is recharged by plugging a charger into a jack on the back edge of the calculator. This example lacks a charger. A sticker on the back gives operating instructions. Text near the bottom of the sticker reads: Microelectronics Product Division (/) Rockwell International (/) Anaheim, California 92803. Further text reads: Calculator Model 61R (/) Assembled in Mexico (/) U.S. and Foreign Parts. It continues: Ser [sic] (/) No. 139029.
label: Description
content: The calculator has a plastic, cloth-lined carrying case marked on the front: Rockwell. Also in the case is a pamphlet entitled <I>The Answer Book Owner’s Manual for Rockwell Model 61R Advanced Slide Rule Electronic Calculator</I>. It is copyrighted 1974.
label: Description
content: Compare the Rockwell 63R (1986.0988.163).
label: Description
content: References:
label: Description
content: [Advertisement], <I>Washington Post</I>, September 23, 1974, p. A7. Rockwell 61R advertised as selling for $119.95.
label: Description
content: [Advertisement], <I>Chicago Tribune</I>, December 4, 1975, p. A6. Rockwell 61R advertised as selling for $69.95.
label: Description
content: [Advertisement], <I>Statesville (N.C.) Record and Landmark</I>,May 12, 1975, p. 3. Rockwell 61R on sale for $79.95
label: Description
content: [Advertisement], <I>Washington Post</I>, July 1, 1976, p. B10. Rockwell 61R, regularly $59.95, on sale for $28.83.
label: Location
content: Currently not on view
place: label: place made
content: Mexico
setName: label: See more items in
content: Medicine and Science: Computers
label: See more items in
content: Computers & Business Machines
label: See more items in
content: Handheld Electronic Calculators
creditLine: label: Credit Line
content: Gift of John B. Priser
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1986.0988.241
label: catalog number
content: 1986.0988.241
label: accession number
content: 1986.0988
objectType: label: Object Name
content: electronic calculator
physicalDescription: label: Physical Description
content: metal (keyboard; circuitry; lock on carrying case material)
label: Physical Description
content: plastic (case; carrying case; display cover; keys material)
label: Physical Description
content: paper (sticker; pamphlet material)
label: Measurements
content: overall: 1 in x 3 1/4 in x 6 in; 2.54 cm x 8.255 cm x 15.24 cm