Surveying Instrument Collection
Maker |
Facit AB (Sweden) |
Model |
CM 2-13 |
Serial Number |
184827 |
Dimensions |
Length 210mm, Width 180mm, Height 160mm |
Image |
|
Description |
This Calculating Machine was introduced by FACIT in about 1940. The machine incorporates a barrel-type mechanical design with a 'ten-key' keyboard consisting of numbers labelled 0 to 9. The machine carries three registers, the product register (register for showing the results of additions) on the top left, the multiplier register on the top right and the 13-digit setting register on the bottom left. The setting register is fed by the ten-key keyboard at the bottom. Each number is typed on the keyboard, digit by digit, and the setting register moves one space to the left each time a digit is entered. The main handle and the setting register clearance handle are at the right, as usual, and the three red-coloured keys situated next to the ten-key keyboard are for controlling the carriage movement. This ten-key machine allows very simple touch operation, but necessitates a zero being entered wherever it is required. On the other hand, ten-key machines tend to be smaller and lighter than their full-keyboard competitors. The machine provides the provision for all four arithmetic operations to take place, namely addition, subtraction, multiplication and division. |
History & comments |
The Facit calculating machine has perhaps been, in the past, the second most widely applied arithmetic instrument, with the Brunsviga being the first. |
Conservation |
In a container |
Condition |
Inoperative, poor condition |
Remarks | |
Dates |
Manufactured in 1940 (approx). Catalogued in 1997 |