BRUNSVIGA - Gehirn von Stahl. Display cabinet 2 in Room 1
Invitation ...
1904
Invitation to view our new German adding machine "Addograph" put on the market by us (...)". With the invitation originally came a post card with which the addressee could subscribe to the demonstration.
Manual for Addograph
1904, 41 pages, 22 illustrations
Apart from the calculating, also e.g. the feeding of paper, the oiling of the machine and the exchange of the inkpad is discussed. With the adding machine were delivered as accessories either a roll of paper or 12 sheets of printing paper. In both cases, a glass of printing ink, a brush, three inkpads and a fabric cover were supplied.
Trinks adder ADDOGRAPH
1903 - s/n 12. Printing, electrically driven full-keyboard adder with radial pinwheels
From about 1902 to 1906, "GNC" tried to market various adding machines apart from the four-species calculators. In 1903, "GNC" announced the Addograph. It used a system where the appropriate number of pins was pushed into the pinwheel by external levers connected to the keyboard, operated both the printer and the result register, and was then reset outwards at the end of the rotation. Despite the existence of advertising material, only very few machines were sold. From the serial number of the machine exhibited, we can assume that at least twelve machines were constructed. On November 10 1904, Franz Trinks notified the board of directors that he "plans to start in April to sell the modified machines in stock." Apparently this was not possible - on May 1st 1908, the production of adding machines was stopped.
Column adder MATADOR
1905 - s/n 152. Non-reversible hand-operated single-number adding machine driven through nine levers.
Apart from the Addograph, "GNC", at the beginning of the 20th century, built the Matador machines in a number of variants. This model is a column adder, also named "single-number adder". Except for this model, also Matador machines with keys instead of levers could be bought, e.g. at the Brunsviga distributor in Johannesburg, M&F Elkan.
Advertisement for Matador
1905
Manual for column adder "Matador"
1905
The leaflet explains the use of the column adder. One after the other, the ones, then the tens, then the hundreds etc. of a sum are added up. When the result is complete for a particular position, the operator moves the carriage one position.
Adding machine MATADOR
1905 - s/n 702 Hand operated reversible adding machine with pinwheels.
This version of the matador can add and subtract. For this, the lever on the left side must be moved, to unblock a safety. After setting of the numbers, the lever must be returned to the original position prior to adding or subtracting. The setting part of the machine in this particular example is adapted for English currency, i.e. 1 position: farthing, 2nd position: pence, 3rd and 4th position: shilling, 5th to 10th position: pound.
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