Review of the Felix M Arithmometer

Having put things in order in the garage, I found an Felix M arithmometer from 1978.

It was not a gadget with a bunch of electronics, but a heavy representative of old iron.

My father worked as a metal engineer long ago, and they used a piece of paper and a slide rule for calculations. Therefore, to speed up the calculations, my father bought himself a mechanical arithmometer in 1978. It was the sunset of the era of arithmometers. In 1978, it was relatively free to buy Electronics B3-18A, but it cost 220r with an engineer’s salary of 120-140r, while an arithmometer cost 15r. Actually, the price and the need for constant settlements have become a decisive factor. Felix M swept across the entire union from Cherepovets, where, by the way, it was bought, to Baikonur and Vladivostok. And it weighs quite a bit - just over 5 kg.

Let's get down to the review. Felix spent the last 20-25 years in the garage, traveled a lot, so his appearance is not the best, but all the mechanisms work perfectly (even lubrication was not required).

Front view: 1 - handle for adding / subtracting
2 - levers for setting the number
3 - lock
4 - counter reset lever
5 - rev counter
6 - result
7 - shift lever
8 - lever reset result


View from the left side:

Rear view:
Embossing close-up:

View from the right side:

Bottom

view: Top view:

Revolution counter:

Result:

Below, for example, we multiply 11 by 321 for this:
1) we set 11
2) 1 revolution - we multiply by 1
3) right shift by 1
4) 2 turns - we multiply by 20
5) right shift by 1
6) 3 turns - we multiply by 300 we
got 3531


process videos:


UPD
A little bit of insides: