Addiators A Collection of Mechanical Calculators

Addiators, or troncets, are simple adding or adding/subtracting devices which operate via a system of slides usually operated with a stylus. They are also commonly known as slide adders. Addiators are strictly speaking just one of many brands of slide adder, but the term "Addiator" has been adopted as the generic term for all such…

Addiators A Collection of Mechanical Calculators

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Angle/Time Calculators

Addiator Calculating Machine For Pounds Shillings And Pence [ 17.5cm METAL CALCULATOR, BLACK & GILT PAINTED FRONT WITH YELLOW LETTERING + LOGO ON TOP, NUMEROUS HOLES & SLIDE SLITS TO MOVE INDICATORS

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Vintage Arithmetic ruler Calculator Mechanical Slide Addiator 1960s USSR.

Portable Antique Mechanical Calculator - Old Fashioned Abacus Dialer - Can be Added or subtracted - 20.511.5CM : Office Products

Addiator - Mechanical Calculators

Addiator Slide Adder (Troncet) A Collection of Mechanical Calculators

Vintage Arithmetic ruler Calculator Mechanical Slide Addiator 1960s USSR.

Addiator Duplex Adding And Subtracting Machine [ 12.6cm METAL CALCULATOR, BLACK & GILT PAINTED FRONT WITH YELLOW LETTERING + LOGO ON TOP, NUMEROUS HOLES & SLIDE SLITS TO MOVE INDICATORS, RESET LEVER +

Addiator Arithma Mechanical Calculator

Mechanical calculator - Wikipedia