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Mechanical Monsters

Although the VEGA was the first fully electronic Soviet calculator, it was preceeded (and followed) by an interesting variety of Mechanical and Electromechanical Calculating Monsters. Some of these machines were extremely heavy (almost solid hunks of metal, 20+ kg), and were either entirely mechanical, or combined both mechanical and early electronic systems to perform calculation. Few of these machines are known to exist today, and many of the pictures you see here are gathered from manuals and references in period books.

Although sometimes difficult to categorise, this index attempts to contain all the machines which use some form of mechanical system as part of calculation/display. Purely electronic machines appear in the other indexes.

Each calculator shown here has a dedicated page with larger images and more information. Calculators are sorted by estimated date of production (these dates are mostly guesses). If you have information about a calculator not present on this list, or further information about one that is, or corrections to data already here, I would appreciate hearing from you!




pre
1960s


Odhner

Odhner

Felix
Felix M

Felix

The most famous of the mechanical Soviet machines, and perhaps the most beautiful.


...
1960s


VK-1

VK1

An interesting keyboard!

VK-2

VK2

Electromechanical version of the VK-1


VMM-2

VMM2

VMP-2

VMP-2

P44SM

P44SM

The P44SM is an sleek electromechanical monster with nearly 200 keys!


1970s


Vilnius

Vilnius

Bystritsa-2

Bystritsa

Performing division on these machines was a major miracle - make sure you read how it's done!

Rasa

Rasa

Produced around 1970, and weighing approximately 20kg, this machine had a 'Thyrotron-powered spinning Stroboscopic Display', using a drum spinning at 1500 rpm, which was rather noisy?!! Oh, my goodness!




?


Ros

No Picture available

Orbita

No Picture available



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