General Information

Serial #

047932

Part Number

1

Total Parts

2

AKA

N/A

Patents

N/A

General Description

SYNTHETIC WITH METAL TRIM/ SYNTHETIC CASE

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length

17.5 cm

Width

9.5 cm

Height

4.5 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Mathematics

Category

Calculating devices

Sub-Category

N/A

Manufacturer

AKA

National Semiconductor

Country

United States of America

State/Province

California

City

Sunnyvale

Context

Country

Canada

State/Province

Quebec

Period

C. 1974-1980

Canada

IT IS A CLOSE COPY OF THE HP-45 BUT PROBABLY HALF THE PRICE. RCB BOUGHT A HP-45 IN 1973 FOR $501 (TAX INCL.) BUT THIS CALCULATOR WAS PROBABLY $300 OR LESS.

Function

USED BY SCIENTISTS & ENGINEERS TO CALCULATE MULTIPLE FUNCTIONS. FORTY FUNCTIONS USING A "FUNCTION" KEY TO MAKE EACH KEY OPERATE 2 FUNCTIONS. CAN BE SET FOR EXPONENTIAL DISPLAY. 10 DIGIT DISPLAY.

Technical

DESIGN COPIED FROM HEWLETT PACKARD CALCULATORS (E.G. HP-35,45,65). AS WITH HPS, THIS USEDREVERSE POLISH NOTATION (SEE PG 14 OF MANUAL) WHICH MADE MORE EFFICIENT USE OF THE REGISTRARS & WAS FASTER TO MANIPULATE ESP. FOR COMPLEX SERIES OF CALCULATIONS.

Area Notes

Unknown

Details

Markings

CALCULATOR: PRINTED ON TOP: 'National/ Semiconductor 4640/ [DESIGNATIONS ON AND BELOWN BUTTONS]'/ MFG'S STICKER ON BACK: 'NATIONAL/ SEMICONDUCTOR/ Consumer Products from/ National Semiconductor Corporation/ 1177 Kern Avenue, Sunnyvale/ California 94086/ Serial No./ 047932/ Made in U.S.A.'/ MOLDED IN BACK: 'MADE IN USA/ U645'/ CASE: STAMPED IN ZIPPER TAG: 'TALON'

Missing

NO ADAPTOR

Finish

CALCULATOR: BLACK TEXTURED BODY; YELLOW, WHITE OR BLACK BUTTONS/ CASE: BROWN SIMULATED LEATHER OUTSIDE; BLACK ZIPPER AND INSIDE PADDING

Decoration

CALCULATOR: NARROW SILVER METAL STRIPS AROUND TOP FRONT