Facit mechanical calculator manual

Facit – electromechanical calculators. From the early s on, the Swedish company Facit achieved enormous success with its mechanical calculators. They were exported around the world. By the early s, the electronic revolution was underway and the calculators followed along. However, although Facit’s management new big. Facit ESA-O1. Electro-mechanical, pin-wheel calculator. Can multiply a 9 digit number by an 8 digit number and give a 13 digit answer. Functions - Addition/Subtraction/Multiplication/Division. mm x mm x mm (11" x 10" x 7"), 13 Kg ( lbs.). Made in Sweden by Atvidaberg-Facit.  · This is the manual for the Facit It explains the four basic arithmetic operations, as well as discounts, percentages, British Currency, and even provides a table for calculating square roots. Note that the fold-out leaf with a numbered diagram of the .

FACIT Calculators. The following is a description of the models manufactured by FACIT since with its serial numbers. In each case an effort has been made to include photos of items provided by collectors of mechanical calculators. The captions included in each model were taken from a FACIT catalog published in This is only a small sample of mechanical calculators. There were many more models from many manufacturers. For more featured non-decimal machines see the Non-decimal Calculators section.. For featured British mechanical calculators see the associated British Vintage Calculators site.. Mechanical calculating machines date from the early s - see the Calculator Time-line Section. The Facit C Pinwheel Calculator -Technical Description Introduction A digit mechanism with back-transfer and a key numeric keypad was introduced as the manual Model CM in The fully-automatic CA followed in , with an updated Model in The 13 and digit mechanisms were both manufactured in parallel.

A selection of Mechanical calculators: The basic operating principles of mechanical calculators changed little from the end of the 19th century to their obsolescence in the s, though there were many developments in the mechanisms and the materials used. This site shows representative examples of the different types. Facit calculators work on a similar principle to the more conventional Odhner type pinwheel calculators, but their external appearance and user interface is strikingly different. Rather than having an external moving carriage in conjunction with a fixed rotor, Facit machines reverse this arrangement and the carriage is fixed but the rotor moves. Antique Mechanical Calculator for Pencil or Pen Made in Germany Manual Numerical Calculator 20's Art Deco Office OffbeatAvenue 5 out of 5 stars (1,).