Texas Instruments 1250 Handheld Electronic Calculator
date: label: date made
content: 1977
name: label: maker
content: Texas Instruments
notes: label: Description
content: This handheld electronic calculator has a black plastic case and a metal keyboard. It has an array of twenty-four rectangular black plastic keys. The meaning of the keys is indicated on the keyboard. There are ten digit keys a decimal point key, a total key, four arithmetic function keys, a clear key, a clear entry key, a change sign key, and a percentage key. Above these is a row of four memory keys. The on/off switch is on the left edge. A mark above the keyboard on the left reads: TEXAS INSTRUMENTS. Behind the keyboard is an eight-digit LED display. A mark below the keys reads: TI-1250.
label: Description
content: A jack for a power outlet is along the back edge. A sticker on the back reads: US PAT 3819921 AND OTHER PATS PENDING (/) TEXAS INSTRUMENTS (/) Serial No. A 2197367. The sticker indicates that the calculator should be recharged using an AC9180 adapter/charger. It also reads in part: ASSEMBLED IN USA. Below the sticker is a compartment for a nine-volt battery. A mark below it reads: 0777 LTA.
label: Description
content: Compare this calculator to the TI-1400 (1986.0988.195). The latter lacks memory keys. Also compare the TI-1265 (1986.0988.193). It has the same keys, but different coloring of the keyboard and a different type of display.
label: Description
content: Ball & Flamm give a 1975 price of $19.95.
label: Description
content: Reference:
label: Description
content: Guy Ball and Bruce Flamm, <I>The Complete Collector’s Guide to Pocket Calculators</I>, Tustin, CA: Wilson/Barnett, 1997, p. 156.
label: Location
content: Currently not on view
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: 1986.0988.053
label: catalog number
content: 1986.0988.053
label: accession number
content: 1986.0988
objectType: label: Object Name
content: electronic calculator
label: Other Terms
content: electronic calculator; Handheld
physicalDescription: label: Physical Description
content: plastic (case; keys material)
label: Physical Description
content: metal (keyboard; circuitry material)
label: Physical Description
content: paper (sticker material)
label: Measurements
content: overall: 1 1/4 in x 2 1/2 in x 5 1/2 in; 3.175 cm x 6.35 cm x 13.97 cm