The Kohner Easy Adder

Ғылым және технология

The Easy Adder by Kohner is a toy adding machine from the mid 1960s. It has a single dial like an old rotary phone with which you can add a digit to the total. It can also subtract.
Stephen Freeborn has a nice video of this machine: • Kohner Easy Adder Addi...
For more information about this and other machines in my collection, please visit my website:
www.jaapsch.net/mechcalc/
0:00 Introduction
0:16 Addition
0:46 Subtraction
1:21 Clearing
2:27 Mechanism
4:51 Outro

Пікірлер: 5

  • @guldilo
    @guldilo10 ай бұрын

    Thank you! Beautiful toy!

  • @rubberswan
    @rubberswan10 ай бұрын

    I have one of those in the opposite colour way - the red bits are yellow, and the yellow bits are red.

  • @jaapsch2

    @jaapsch2

    10 ай бұрын

    I've also seen pictures of a blue one, but it seems the red ones are by far the most common.

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