Texas Instruments Concept II Handheld Electronic Calculator

Description:

Texas Instruments continued to manufacture calculators sold by other companies. This example was marketed by the Zayre department store chain. The 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 keyboard on the left reads: TEXAS INSTRUMENTS. Behind the keyboard is an eight-digit LED display. A mark below the keys reads: CONCEPT II.

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 (/) Concept II (/) Serial No. 1027861. It also reads in part: ASSEMBLED IN USA. Below the sticker is a compartment for a nine-volt battery. A mark below it reads: 4276 LTA. Unscrewing four screws on the back of the calculator does not reveal the chip.

Compare the Concept II calculator with the TI-1250 (1986.0988.053). By 1977 Zayre stores sold different calculators under the Concept name.

References:

[Advertisement], Hartford Courant , June 6, 1976, p. 8O, Selling for $14.77, regularly $18.77.

[Advertisement], Hartford Courant , December 5, 1976, p. 25L. Selling for $13.88, regularly $16.88.

Online Datamath museum, accessed June 3, 2015.

Date Made: 1976

Maker: Texas Instruments

Location: Currently not on view

See more items in: Medicine and Science: Computers, Computers & Business Machines, Handheld Electronic Calculators

Exhibition:

Exhibition Location:

Credit Line: Gift of John B. Priser

Data Source: National Museum of American History

Id Number: 1986.0988.192Accession Number: 1986.0988Catalog Number: 1986.0988.192

Object Name: electronic calculatorOther Terms: electronic calculator; Handheld

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

Guid: http://n2t.net/ark:/65665/ng49ca746a1-374a-704b-e053-15f76fa0b4fa

Record Id: nmah_334606

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