Calculator Collection.

Here is my collection of old electronic calculators. Updated! (2/21/2007)

 

I started to collect some old calculators without luck some years ago, however, now, I'm able to find more calculators at the flea market. Whenever is possible, I make it work.

 

Novus 650 - Mathbox

 

Standard Calculator.

 

Keys: CE/C, ENT+, -, X, / (div), 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 and ON switch.

 

As you can see, there is no PERIOD key (for decimals) as it is already on the display showing two decimal positions.

 

I found this one with the keys not working and the plastic cover of the display upside down. I was able to make it work. It was in really bad shape.

 

Display LEDs, Color: Red, 7 Segments, 6 digits (two decimal places included).

 

This calculator was made by National Semiconductor, it is a basic calculator. I guess it was made for students at low cost.

 

Additional information on the back:

 

NOVUS 650
See manual for detailed instructions
OPERATION: Always enter fist number with the ENT+ key. Enter subsequent numbers, then touch function key desired.
CLEAR: If last key used was a number, touch CE/C once to clear entry, twice to clear all. If last key was a function, one touch of CE/C clears all.
POWER: Use 9V alkaline battery. Turn power off when replacing battery or connecting adapter.
DECIMAL POINT: The decimal on display is fixed at 2 places as guide for adding and subtracting only.

 

EXAMPLES:

 

123 + 45 - 600 = -432
ENTER/PRESS:
[CE/C] 123 [ENT+] 45 [ENT+] 600 [-] Display: -4.32

 

5.00 + 5.00 = 10.00
[CE/C] 500 [ENT+] 500 [ENT+] Display: 10.0

 

6 / 2 = 3
[CE/C] 6 [ENT+] 2 [/] Display: . 3

 

6 X 2 = 12
[CE/C] 6 [ENT+] 2 [X] Display: .12

 

62 = 36
[CE/C] 6 [ENT+] [X] Display: .36

 

NOVUS - Consumer Products from National Semiconductor Corporation. Made in U.S.A.

 

Serial No. 2692264

 

Casio memory-8R

 

Standard calculator.

 

Keys: AC, C, %, MR, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, =, +, -, x, / (division)

 

On/off switch.

 

Display fluorescent, color: Green, 7 segments, 8 digits

 

Additional info on the back:

 

Works with two AA batteries (1.5 x 2) or use AC adaptor AD-2S. 0.2 Watts.
Y-811
Made in Japan
Casio Computer Co, LTD
Serial 7018018

 

Works ok, appears to be on very good condition.

 

Texas Instruments TI-30

 

Scientific Calculator.

 

Keys: 1/x, x2, sqr(x), OFF, ON/C, INV, sin, cos, tan, DRG, K, EEv, log, inx, y2, PI, %, (, ), / (div), X, -, +, =, +/-, STO, RCL, SUM, EXC, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, .

 


 

Display LEDs, color RED, 7 segments, 9 digits.

 

Works with 1 (one) 9-volts battery (6LR61 or size 522). Doesn't appears to have an AC adapter jack, however, it have a hole and enough room for additional circuits inside the calculator, but I don't have any information about it.

 

Additional Information on the back:

 

Texas Instruments
Electronic Calculator
Serial number: 1026529 ATA 3481
Assembled in USA.

 

Patents numbers on the back.

 

On the back there is a name, lightly visible, it says: "Larry Valenzuela".

 

National Semiconductor 4640.

 

Scientific Calculator.

 

Keys: F, SIN, COS, TAN, DMS, LN, LOG, 1/x, Sqr(), ->P, M+, SUM+, %%, x->y, ROLL, MR, MS, EEX, CHS, CF, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, ., / (division), X, -, +, C

 

Additional functions: SIN-1, COS-1, TAN-1, ->D, ex, 10x, yx, x2, ->R, x!, SUM-, Delta%, PI, SD, x-, ENG, DS, ->KG, ->CM, ->LIT, ->LB, ->IN, ->GAL, DEG, GRAD, RAD, oF, oC, CA

 

Display: LEDs, Seven segments, Color RED. 14 Digits.

 

Additional Information on the back:

 

NATIONAL SEMICONDUCTOR
Consumer Products from National Semiconductor Corporation
1177 Kern Avenue, Suynnyvale, California 94086
Made in USA
Serial No: 081590
Engraved: MADE IN USA U646.

 

It works fine. It doesn't use regular batteries, it had rechargeable batteries but I had to remove it and throw it away because it was damaging the calculator.

 

The way this calculator works if kinda weird, the digits goes from left to right (regular calculators displays the numbers from the right to the left).

 

This little machine is amazing, have a lots of functions that I don't even see on newer calculators, however, I can't find the " = " key. I'm not sure how to use it. Appears the division and multiplication keys doesn't work or I don't know how to use it.

 

Update: It uses REVERSE POLISH NOTATION. Thanks PKM!

 

Canon Checkbook [Money Manager]

 

Money Manager Calculator.

 

Keys: 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, ., % +-, CL, C, =, X, / (div), -, +, ON, OFF, CHK1, DEP1, BAL1, CHK2, DEP2, BAL2, CHK3, DEP3, BAL3, GT

 

Display: LCD 8 digits, with "123 M - E" indicators.

 

Two screws are missing but the calculator is in really good condition. It allows to manage three checking accounts easily, even the cents.

 

Additional Information on the back:
Canon checkbook
D.C. 3V 0.1mW
CANON INC. JAPAN
USE LITHIUM BATTERY 3Vx1
121986 (Maybe the serial number?)

 

Texas Instruments unknown.

UPDATE: Appears this is a TI-1250, circa 1975.

 

Scientific Calculator (?)Standard Calculator

 

Keys: MC, MR, M-, M+, C, CS, %, / (div), X, -, +, =, . , CE, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 and on/off switch.

 

Somebody removed the cover and there is no keys labeled, not even the model number, however, it does have 24 keys. so I guess this is a scientific calculator.

 

Display: LEDs, 7 Segments, 8 digits, Color: RED.

 

It doesn't work (yet), under restoration process. It uses a 9v battery.

 

Additional information on the back:

 

US PAT 819921 AND OTHERS PARTS PENDING
TEXAS INSTRUMENTS
SERIAL No A17927
A DIM OR ERRATIC DISPLAY INDICATES DISCHARGED BATTERY
REFER TO MANUAL OR BOX PANEL FOR ADDITIONAL INFORMATION
OPERATION EXAMPLES
ADD/SUBTRAC 4+6-3=7
MULTIPLY/DIVIDE 27X2/3=18
ADD-ON PERCERNT 20+6%=21.2
DISCOUNT PERCENT 20-6%=18.8
TO CLEAR CALCULATOR Depress C key
TO CLEAR LAST ENTRY Depress CE key

 

Model AC 9180 adapter available from your dealer for operation on household line voltage.

 

ASSEMBLED IN USA
(engraved:) 2976 LTA

 

 

 

 


 < About the Flag on the background.Homepage
discover Index
Cheap products are expensive.> 

 

If any information, data, picture or design infringes a copyrighted material, please send me an e-mail asking to remove it along with the supporting data.
Some features may not work with Google Chrome. © 2006-2010 Jose Pino - Powered by JPC Alpha