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Texas Instruments 1250 Handheld Electronic Calculator

Texas Instruments 1250 Handheld Electronic Calculator

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Description
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.
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.
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.
Ball & Flamm give a 1975 price of $19.95.
Reference:
Guy Ball and Bruce Flamm, The Complete Collector’s Guide to Pocket Calculators, Tustin, CA: Wilson/Barnett, 1997, p. 156.
Location
Currently not on view
Object Name
electronic calculator
date made
1977
maker
Texas Instruments
Physical Description
plastic (case; keys material)
metal (keyboard; circuitry material)
paper (sticker material)
Measurements
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
ID Number
1986.0988.053
catalog number
1986.0988.053
accession number
1986.0988
Credit Line
Gift of John B. Priser
See more items in
Medicine and Science: Computers
Handheld Electronic Calculators
Computers & Business Machines
Data Source
National Museum of American History
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