Object Details
maker
Texas Instruments
Description
This handheld programmable scientific electronic calculator has a black plastic case and forty-five small rectangular plastic keys arranged in nine rows. In addition to ten digit keys, a decimal point key, and a change sign key (all light gray), the calculator has a total key, four arithmetic function keys, a clear key, a clear entry key, and a "2nd" key (all gold). The remaining keys are brown. Pushing the “2nd” key allows the keys to serve a “dual function,” which is given in text above the keys.
The space for programming cards is just above the keyboard. A mark behind this reads: TEXAS INSTRUMENTS SR-52. Behind it are an R/D (radians/degrees) switch and an on/off switch. Behind this is an LED display that shows ten positive or negative digits of the result as well as powers of ten from -99 to +99.
The power supply plugs into the calculator along the back edge. A mark on it reads: MODEL AC 9130A.
A sticker on the back of the calculator reads in part: TEXAS INSTRUMENTS (/) SR-52 (/) Serial No. (/) SR-52 011415. It also reads in part: ASSEMBLED IN USA. Below the sticker is a compartment that holds three batteries. A sticker for it reads in part: TEXAS INSTRUMENTS BATTERY PACK BP-1. Removing the battery pack reveals two chips. The larger has text that reads: TMC0501NL (/) EΔ7537. The small one has the mark: TMC 0595 NL (/) BA7539. A mark on the back of the calculator near the bottom reads: 4675DTA.
Also included with the object is a black plastic folder that holds twenty-six magnetic cards with programs on them, a tablet of preprinted forms for writing programs, and two small spiral-bound notebooks of documentation. One is the Owner's Manual, the other is the Operating Guide. These documents are copyrighted 1975.
Compare 1987.0435.01 and 1987.0487.297.
Ball & Flamm give a 1976 price of $229.
Reference:
Guy Ball and Bruce Flamm, The Complete Collector’s Guide to Pocket Calculators, Tustin, CA: Wilson/Barnett, 1997, p. 154.
Location
Currently not on view
Credit Line
Gift of Uta C. Merzbach
date made
1975
ID Number
2010.3093.01
nonaccession number
2010.3093
catalog number
2010.3093.01
Object Name
electronic calculator
Physical Description
plastic (case; keys; power supply case; program case material)
metal (circuitry; screws material)
paper (manuals; box; program sheets material)
Measurements
calculator: 4.5 cm x 8 cm x 26 cm; 1 25/32 in x 3 5/32 in x 10 1/4 in
overall: 7 cm x 21.5 cm x 28 cm; 2 3/4 in x 8 15/32 in x 11 1/32 in
See more items in
Medicine and Science: Computers
Computers & Business Machines
Handheld Electronic Calculators
Data Source
National Museum of American History
Link to Original Record
Record ID
nmah_1399127